Plugin test rework

Cleanup of plugin test code. Renames many files. Prep for VOL branch merge.

14 files changed, 2011 insertions, 1714 deletions

diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index 8522c1d..0a2afbf 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -70,73 +70,73 @@ if (BUILD_SHARED_LIBS)
 endif ()
 
 #-----------------------------------------------------------------------------
-# If plugin library tests can be tested
+# If filter plugin tests can be tested
 #-----------------------------------------------------------------------------
   # make plugins dir
-  file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/testdir1")
-  file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/testdir2")
+  file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/filter_plugin_dir1")
+  file (MAKE_DIRECTORY "${CMAKE_BINARY_DIR}/filter_plugin_dir2")
 
   #-----------------------------------------------------------------------------
-  # Define Plugin Test Sources
+  # Define Filter Plugin Test Sources
   #-----------------------------------------------------------------------------
-  set (TEST_PLUGIN_LIBS
-      dynlib1
-      dynlib3
+  set (FILTER_PLUGINS_FOR_DIR1
+      filter_plugin1_dsets
+      filter_plugin3_dsets
   )
-  set (TEST2_PLUGIN_LIBS
-      dynlib2
-      dynlib4
+  set (FILTER_PLUGINS_FOR_DIR2
+      filter_plugin2_dsets
+      filter_plugin4_groups
   )
 
-  foreach (test_lib ${TEST_PLUGIN_LIBS})
-    set (HDF5_TEST_PLUGIN_LIB_CORENAME         "${test_lib}")
-    set (HDF5_TEST_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TEST_PLUGIN_LIB_CORENAME}")
-    set (HDF5_TEST_PLUGIN_LIB_TARGET           ${HDF5_TEST_PLUGIN_LIB_CORENAME})
+  foreach (plugin_name ${FILTER_PLUGINS_FOR_DIR1})
+    set (HDF5_TEST_PLUGIN_CORENAME          "${plugin_name}")
+    set (HDF5_TEST_PLUGIN_NAME              "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TEST_PLUGIN_CORENAME}")
+    set (HDF5_TEST_PLUGIN_TARGET            ${HDF5_TEST_PLUGIN_CORENAME})
     add_definitions (${HDF_EXTRA_C_FLAGS})
     INCLUDE_DIRECTORIES (${HDF5_SRC_DIR})
 
-    add_library (${HDF5_TEST_PLUGIN_LIB_TARGET} SHARED ${HDF5_TEST_SOURCE_DIR}/${test_lib}.c)
-    TARGET_C_PROPERTIES (${HDF5_TEST_PLUGIN_LIB_TARGET} SHARED " " " ")
-    target_link_libraries (${HDF5_TEST_PLUGIN_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
-    H5_SET_LIB_OPTIONS (${HDF5_TEST_PLUGIN_LIB_TARGET} ${HDF5_TEST_PLUGIN_LIB_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
-    set_target_properties (${HDF5_TEST_PLUGIN_LIB_TARGET} PROPERTIES FOLDER libraries/TEST_PLUGIN)
+    add_library (${HDF5_TEST_PLUGIN_TARGET} SHARED ${HDF5_TEST_SOURCE_DIR}/${plugin_name}.c)
+    TARGET_C_PROPERTIES (${HDF5_TEST_PLUGIN_TARGET} SHARED " " " ")
+    target_link_libraries (${HDF5_TEST_PLUGIN_TARGET} ${HDF5_TEST_LIB_TARGET})
+    H5_SET_LIB_OPTIONS (${HDF5_TEST_PLUGIN_TARGET} ${HDF5_TEST_PLUGIN_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
+    set_target_properties (${HDF5_TEST_PLUGIN_TARGET} PROPERTIES FOLDER libraries/TEST_PLUGIN)
 
     #-----------------------------------------------------------------------------
-    # Copy plugin library to a plugins folder
+    # Copy the filter plugin to a plugins folder
     #-----------------------------------------------------------------------------
     add_custom_command (
-        TARGET     ${HDF5_TEST_PLUGIN_LIB_TARGET}
+        TARGET     ${HDF5_TEST_PLUGIN_TARGET}
         POST_BUILD
         COMMAND    ${CMAKE_COMMAND}
         ARGS       -E copy_if_different
-          "$<TARGET_FILE:${HDF5_TEST_PLUGIN_LIB_TARGET}>"
-          "${CMAKE_BINARY_DIR}/testdir1/$<TARGET_FILE_NAME:${HDF5_TEST_PLUGIN_LIB_TARGET}>"
+          "$<TARGET_FILE:${HDF5_TEST_PLUGIN_TARGET}>"
+          "${CMAKE_BINARY_DIR}/filter_plugin_dir1/$<TARGET_FILE_NAME:${HDF5_TEST_PLUGIN_TARGET}>"
     )
   endforeach ()
 
-  foreach (test_lib ${TEST2_PLUGIN_LIBS})
-    set (HDF5_TEST_PLUGIN_LIB_CORENAME         "${test_lib}")
-    set (HDF5_TEST_PLUGIN_LIB_NAME             "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TEST_PLUGIN_LIB_CORENAME}")
-    set (HDF5_TEST_PLUGIN_LIB_TARGET           ${HDF5_TEST_PLUGIN_LIB_CORENAME})
+  foreach ( plugin_name ${FILTER_PLUGINS_FOR_DIR2})
+    set (HDF5_TEST_PLUGIN_CORENAME          "${plugin_name}")
+    set (HDF5_TEST_PLUGIN_NAME              "${HDF5_EXTERNAL_LIB_PREFIX}${HDF5_TEST_PLUGIN_CORENAME}")
+    set (HDF5_TEST_PLUGIN_TARGET            ${HDF5_TEST_PLUGIN_CORENAME})
     add_definitions (${HDF_EXTRA_C_FLAGS})
     INCLUDE_DIRECTORIES (${HDF5_SRC_DIR})
 
-    add_library (${HDF5_TEST_PLUGIN_LIB_TARGET} SHARED ${HDF5_TEST_SOURCE_DIR}/${test_lib}.c)
-    TARGET_C_PROPERTIES (${HDF5_TEST_PLUGIN_LIB_TARGET} SHARED " " " ")
-    target_link_libraries (${HDF5_TEST_PLUGIN_LIB_TARGET} ${HDF5_TEST_LIB_TARGET})
-    H5_SET_LIB_OPTIONS (${HDF5_TEST_PLUGIN_LIB_TARGET} ${HDF5_TEST_PLUGIN_LIB_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
-    set_target_properties (${HDF5_TEST_PLUGIN_LIB_TARGET} PROPERTIES FOLDER libraries/TEST_PLUGIN)
+    add_library (${HDF5_TEST_PLUGIN_TARGET} SHARED ${HDF5_TEST_SOURCE_DIR}/${plugin_name}.c)
+    TARGET_C_PROPERTIES (${HDF5_TEST_PLUGIN_TARGET} SHARED " " " ")
+    target_link_libraries (${HDF5_TEST_PLUGIN_TARGET} ${HDF5_TEST_LIB_TARGET})
+    H5_SET_LIB_OPTIONS (${HDF5_TEST_PLUGIN_TARGET} ${HDF5_TEST_PLUGIN_NAME} SHARED ${HDF5_PACKAGE_SOVERSION})
+    set_target_properties (${HDF5_TEST_PLUGIN_TARGET} PROPERTIES FOLDER libraries/TEST_PLUGIN)
 
     #-----------------------------------------------------------------------------
-    # Copy plugin library to a plugins folder
+    # Copy the filter plugin to a plugins folder
     #-----------------------------------------------------------------------------
     add_custom_command (
-        TARGET     ${HDF5_TEST_PLUGIN_LIB_TARGET}
+        TARGET     ${HDF5_TEST_PLUGIN_TARGET}
         POST_BUILD
         COMMAND    ${CMAKE_COMMAND}
         ARGS       -E copy_if_different
-          "$<TARGET_FILE:${HDF5_TEST_PLUGIN_LIB_TARGET}>"
-          "${CMAKE_BINARY_DIR}/testdir2/$<TARGET_FILE_NAME:${HDF5_TEST_PLUGIN_LIB_TARGET}>"
+          "$<TARGET_FILE:${HDF5_TEST_PLUGIN_TARGET}>"
+          "${CMAKE_BINARY_DIR}/filter_plugin_dir2/$<TARGET_FILE_NAME:${HDF5_TEST_PLUGIN_TARGET}>"
     )
   endforeach ()
 
@@ -411,17 +411,17 @@ endif ()
 ###    P L U G I N  T E S T S
 ##############################################################################
 if (BUILD_SHARED_LIBS)
-  add_executable (plugin ${HDF5_TEST_SOURCE_DIR}/plugin.c)
-  TARGET_NAMING (plugin SHARED)
-  TARGET_C_PROPERTIES (plugin SHARED " " " ")
-  target_link_libraries (plugin ${HDF5_TEST_LIB_TARGET})
-  set_target_properties (plugin PROPERTIES FOLDER test)
+  add_executable (filter_plugin ${HDF5_TEST_SOURCE_DIR}/filter_plugin.c)
+  TARGET_NAMING (filter_plugin SHARED)
+  TARGET_C_PROPERTIES (filter_plugin SHARED " " " ")
+  target_link_libraries (filter_plugin ${HDF5_TEST_LIB_TARGET})
+  set_target_properties (filter_plugin PROPERTIES FOLDER test)
 else ()
-  add_executable (plugin ${HDF5_TEST_SOURCE_DIR}/plugin.c)
-  TARGET_NAMING (plugin STATIC)
-  TARGET_C_PROPERTIES (plugin STATIC " " " ")
-  target_link_libraries (plugin ${HDF5_TEST_LIB_TARGET})
-  set_target_properties (plugin PROPERTIES FOLDER test)
+  add_executable (filter_plugin ${HDF5_TEST_SOURCE_DIR}/filter_plugin.c)
+  TARGET_NAMING (filter_plugin STATIC)
+  TARGET_C_PROPERTIES (filter_plugin STATIC " " " ")
+  target_link_libraries (filter_plugin ${HDF5_TEST_LIB_TARGET})
+  set_target_properties (filter_plugin PROPERTIES FOLDER test)
 endif ()
 
 ##############################################################################
diff --git a/test/CMakeTests.cmake b/test/CMakeTests.cmake
index 61ac3d2..973d389 100644
--- a/test/CMakeTests.cmake
+++ b/test/CMakeTests.cmake
@@ -1,4 +1,4 @@
-#
+
 # Copyright by The HDF Group.
 # All rights reserved.
 #
@@ -520,7 +520,7 @@ set (test_CLEANFILES
     multi_file-r.h5
     multi_file-s.h5
     core_file
-    plugin.h5
+    filter_plugin.h5
     new_move_a.h5
     new_move_b.h5
     ntypes.h5
@@ -1013,7 +1013,7 @@ if (BUILD_SHARED_LIBS)
 endif ()
 
 ##############################################################################
-###    P L U G I N  T E S T S
+###    F I L T E R  P L U G I N  T E S T S
 ##############################################################################
 if (WIN32)
   set (CMAKE_SEP "\;")
@@ -1023,9 +1023,9 @@ else ()
   set (BIN_REL_PATH "../")
 endif ()
 
-add_test (NAME H5PLUGIN-plugin COMMAND $<TARGET_FILE:plugin>)
-set_tests_properties (H5PLUGIN-plugin PROPERTIES
-    ENVIRONMENT "HDF5_PLUGIN_PATH=${CMAKE_BINARY_DIR}/testdir1${CMAKE_SEP}${CMAKE_BINARY_DIR}/testdir2;srcdir=${HDF5_TEST_BINARY_DIR}"
+add_test (NAME H5PLUGIN-filter_plugin COMMAND $<TARGET_FILE:filter_plugin>)
+set_tests_properties (H5PLUGIN-filter_plugin PROPERTIES
+    ENVIRONMENT "HDF5_PLUGIN_PATH=${CMAKE_BINARY_DIR}/filter_plugin_dir1${CMAKE_SEP}${CMAKE_BINARY_DIR}/filter_plugin_dir2;srcdir=${HDF5_TEST_BINARY_DIR}"
     WORKING_DIRECTORY ${HDF5_TEST_BINARY_DIR}
 )
 
diff --git a/test/Makefile.am b/test/Makefile.am
index ba2d79b..4f192ac 100644
--- a/test/Makefile.am
+++ b/test/Makefile.am
@@ -26,11 +26,12 @@ AM_CPPFLAGS+=-I$(top_srcdir)/src -I$(top_builddir)/src
 #       testlibinfo.sh:
 #       testcheck_version.sh: tcheck_version
 #       testlinks_env.sh: links_env
-#       test_filenotclosed.sh: filenotclosed.c
 #       testflushrefresh.sh: flushrefresh
-#       test_usecases.sh: use_append_chunk, use_append_mchunks, use_disable_mdc_flushes
 #       testswmr.sh: swmr*
 #       testvdsswmr.sh: vds_swmr*
+#       test_filenotclosed.sh: filenotclosed.c
+#       test_filter_plugin.sh: filter_plugin.c
+#       test_usecases.sh: use_append_chunk, use_append_mchunks, use_disable_mdc_flushes
 TEST_SCRIPT = testerror.sh testlibinfo.sh testcheck_version.sh testlinks_env.sh test_filenotclosed.sh\
     testswmr.sh testvdsswmr.sh testflushrefresh.sh test_usecases.sh
 SCRIPT_DEPEND = error_test$(EXEEXT) err_compat$(EXEEXT) links_env$(EXEEXT) test_filenotclosed$(EXEEXT) \
@@ -40,8 +41,8 @@ SCRIPT_DEPEND = error_test$(EXEEXT) err_compat$(EXEEXT) links_env$(EXEEXT) test_
     swmr_sparse_reader$(EXEEXT) swmr_sparse_writer$(EXEEXT) swmr_start_write$(EXEEXT) \
     vds_swmr_gen$(EXEEXT) vds_swmr_reader$(EXEEXT) vds_swmr_writer$(EXEEXT)
 if HAVE_SHARED_CONDITIONAL
-  TEST_SCRIPT += test_plugin.sh
-  SCRIPT_DEPEND += plugin$(EXEEXT)
+  TEST_SCRIPT += test_filter_plugin.sh
+  SCRIPT_DEPEND += filter_plugin$(EXEEXT)
 endif
 
 check_SCRIPTS = $(TEST_SCRIPT)
@@ -81,7 +82,7 @@ check_PROGRAMS=$(TEST_PROG) error_test err_compat tcheck_version \
     swmr_remove_writer swmr_addrem_writer swmr_sparse_reader swmr_sparse_writer \
     swmr_check_compat_vfd vds_swmr_gen vds_swmr_reader vds_swmr_writer
 if HAVE_SHARED_CONDITIONAL
-  check_PROGRAMS+= plugin
+  check_PROGRAMS+= filter_plugin
 endif
 
 # These programs generate test files for the tests.  They don't need to be
@@ -102,29 +103,17 @@ endif
 
 if HAVE_SHARED_CONDITIONAL
   # The libh5test library provides common support code for the tests.
-  # The libdynlib1, libdynlib2, libdynlib3, and libdynlib4 library for testing plugin module plugin.c.
-  # Build them as shared libraries if configure is enabled for shared library.
-  noinst_LTLIBRARIES=libh5test.la libdynlib1.la libdynlib2.la libdynlib3.la libdynlib4.la
-  libdynlib1_la_SOURCES=dynlib1.c
-  libdynlib2_la_SOURCES=dynlib2.c
-  libdynlib3_la_SOURCES=dynlib3.c
-  libdynlib4_la_SOURCES=dynlib4.c
-  libdynlib1_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
-  libdynlib2_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
-  libdynlib3_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
-  libdynlib4_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
-
-  libdynlib1.la: $(libdynlib1_la_OBJECTS) $(libdynlib1_la_DEPENDENCIES) $(EXTRA_libdynlib1_la_DEPENDENCIES)
-	$(AM_V_CCLD)$(libdynlib1_la_LINK) $(am_libdynlib1_la_rpath) $(libdynlib1_la_OBJECTS) $(libdynlib1_la_LIBADD)
-
-  libdynlib2.la: $(libdynlib2_la_OBJECTS) $(libdynlib2_la_DEPENDENCIES) $(EXTRA_libdynlib2_la_DEPENDENCIES)
-	$(AM_V_CCLD)$(libdynlib2_la_LINK) $(am_libdynlib2_la_rpath) $(libdynlib2_la_OBJECTS) $(libdynlib2_la_LIBADD)
-
-  libdynlib3.la: $(libdynlib3_la_OBJECTS) $(libdynlib3_la_DEPENDENCIES) $(EXTRA_libdynlib3_la_DEPENDENCIES)
-	$(AM_V_CCLD)$(libdynlib3_la_LINK) $(am_libdynlib3_la_rpath) $(libdynlib3_la_OBJECTS) $(libdynlib3_la_LIBADD)
-
-  libdynlib4.la: $(libdynlib4_la_OBJECTS) $(libdynlib4_la_DEPENDENCIES) $(EXTRA_libdynlib4_la_DEPENDENCIES)
-	$(AM_V_CCLD)$(libdynlib4_la_LINK) $(am_libdynlib4_la_rpath) $(libdynlib4_la_OBJECTS) $(libdynlib4_la_LIBADD) 
+  # The filter_plugin* libraries are for use in filter_plugin.c.
+  # Build them as shared libraries if that option was enabled in configure.
+  noinst_LTLIBRARIES=libh5test.la libfilter_plugin1_dsets.la libfilter_plugin2_dsets.la libfilter_plugin3_dsets.la libfilter_plugin4_groups.la
+  libfilter_plugin1_dsets_la_SOURCES=filter_plugin1_dsets.c
+  libfilter_plugin2_dsets_la_SOURCES=filter_plugin2_dsets.c
+  libfilter_plugin3_dsets_la_SOURCES=filter_plugin3_dsets.c
+  libfilter_plugin4_groups_la_SOURCES=filter_plugin4_groups.c
+  libfilter_plugin1_dsets_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
+  libfilter_plugin2_dsets_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
+  libfilter_plugin3_dsets_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
+  libfilter_plugin4_groups_la_LDFLAGS = -avoid-version -module -shared -export-dynamic -rpath /nowhere
 else
   # The libh5test library provides common support code for the tests.
   noinst_LTLIBRARIES=libh5test.la
@@ -185,7 +174,7 @@ CHECK_CLEANFILES+=accum.h5 cmpd_dset.h5 compact_dataset.h5 dataset.h5 dset_offse
     tmisc[0-9]*.h5 set_extent[1-5].h5 ext[12].bin           \
     getname.h5 getname[1-3].h5 sec2_file.h5 direct_file.h5           \
     family_file000[0-3][0-9].h5 new_family_v16_000[0-3][0-9].h5      \
-    multi_file-[rs].h5 core_file plugin.h5 \
+    multi_file-[rs].h5 core_file filter_plugin.h5 \
     new_move_[ab].h5 ntypes.h5 dangle.h5 error_test.h5 err_compat.h5 \
     dtransform.h5 test_filters.h5 get_file_name.h5 tstint[1-2].h5    \
     unlink_chunked.h5 btree2.h5 btree2_tmp.h5 objcopy_src.h5 objcopy_dst.h5 \
@@ -215,7 +204,7 @@ use_append_mchunks_SOURCES=use_append_mchunks.c use_common.c
 use_disable_mdc_flushes_SOURCES=use_disable_mdc_flushes.c
 
 # Temporary files.
-DISTCLEANFILES=testerror.sh testlibinfo.sh testcheck_version.sh testlinks_env.sh test_plugin.sh \
+DISTCLEANFILES=testerror.sh testlibinfo.sh testcheck_version.sh testlinks_env.sh test_filter_plugin.sh \
     testswmr.sh testvdsswmr.sh test_usecases.sh testflushrefresh.sh test_filenotclosed.sh
 
 include $(top_srcdir)/config/conclude.am
diff --git a/test/dynlib1.c b/test/dynlib1.c
deleted file mode 100644
index e9137fb..0000000
--- a/test/dynlib1.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Copyright by The HDF Group.                                               *
- * All rights reserved.                                                      *
- *                                                                           *
- * This file is part of HDF5. The full HDF5 copyright notice, including      *
- * terms governing use, modification, and redistribution, is contained in    *
- * the COPYING file, which can be found at the root of the source code       *
- * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
- * If you do not have access to either file, you may request a copy from     *
- * help@hdfgroup.org.                                                        *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/*
- * Programmer:	Raymond Lu
- *		13 February 2013
- *
- * Purpose:	Tests the plugin module (H5PL)
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "H5PLextern.h"
-
-#define H5Z_FILTER_DYNLIB1      257
-
-static size_t H5Z_filter_dynlib1(unsigned int flags, size_t cd_nelmts,
-                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
-
-/* This message derives from H5Z */
-const H5Z_class2_t H5Z_DYNLIB1[1] = {{
-    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
-    H5Z_FILTER_DYNLIB1,		     /* Filter id number		*/
-    1, 1,                            /* Encoding and decoding enabled   */
-    "dynlib1",			     /* Filter name for debugging	*/
-    NULL,                            /* The "can apply" callback        */
-    NULL,                            /* The "set local" callback        */
-    (H5Z_func_t)H5Z_filter_dynlib1,    /* The actual filter function	*/
-}};
-
-H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
-const void    *H5PLget_plugin_info(void) {return H5Z_DYNLIB1;}
-
-/*-------------------------------------------------------------------------
- * Function:	H5Z_filter_dynlib1
- *
- * Purpose:	A dynlib1 filter method that adds on and subtract from
- *              the original value with another value.  It will be built 
- *              as a shared library.  plugin.c test will load and use 
- *              this filter library.    
- *
- * Return:	Success:	Data chunk size
- *
- *		Failure:	0
- *
- * Programmer:	Raymond Lu
- *              29 March 2013
- *
- *-------------------------------------------------------------------------
- */
-static size_t
-H5Z_filter_dynlib1(unsigned int flags, size_t cd_nelmts,
-      const unsigned int *cd_values, size_t nbytes,
-      size_t *buf_size, void **buf)
-{
-    int *int_ptr = (int *)*buf;          /* Pointer to the data values */
-    size_t buf_left = *buf_size;  /* Amount of data buffer left to process */
-    int add_on = 0;
-
-    /* Check for the correct number of parameters */
-    if(cd_nelmts == 0)
-        return(0);
-
-    /* Check that permanent parameters are set correctly */
-    if(cd_values[0] > 9)
-        return(0);
-  
-    add_on = (int)cd_values[0];
-
-    if(flags & H5Z_FLAG_REVERSE) { /*read*/
-        /* Substract the "add on" value to all the data values */
-        while(buf_left > 0) {
-            *int_ptr++ -= add_on;
-            buf_left -= sizeof(int);
-        } /* end while */
-    } /* end if */
-    else { /*write*/
-        /* Add the "add on" value to all the data values */
-        while(buf_left > 0) {
-            *int_ptr++ += add_on;
-            buf_left -= sizeof(int);
-        } /* end while */
-    } /* end else */
-
-    return nbytes;
-} /* end H5Z_filter_dynlib1() */
-
diff --git a/test/dynlib2.c b/test/dynlib2.c
deleted file mode 100644
index 2574d4d..0000000
--- a/test/dynlib2.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Copyright by The HDF Group.                                               *
- * All rights reserved.                                                      *
- *                                                                           *
- * This file is part of HDF5. The full HDF5 copyright notice, including      *
- * terms governing use, modification, and redistribution, is contained in    *
- * the COPYING file, which can be found at the root of the source code       *
- * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
- * If you do not have access to either file, you may request a copy from     *
- * help@hdfgroup.org.                                                        *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/*
- * Programmer:	Raymond Lu
- *		13 February 2013
- *
- * Purpose:	Tests the plugin module (H5PL)
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "H5PLextern.h"
-
-#define H5Z_FILTER_DYNLIB2      258 
-#define MULTIPLIER              3
-
-static size_t H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
-                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
-
-/* This message derives from H5Z */
-const H5Z_class2_t H5Z_DYNLIB2[1] = {{
-    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
-    H5Z_FILTER_DYNLIB2,		     /* Filter id number		*/
-    1, 1,                            /* Encoding and decoding enabled   */
-    "dynlib2",			     /* Filter name for debugging	*/
-    NULL,                            /* The "can apply" callback        */
-    NULL,                            /* The "set local" callback        */
-    (H5Z_func_t)H5Z_filter_dynlib2,    /* The actual filter function	*/
-}};
-
-H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
-const void   *H5PLget_plugin_info(void) {return H5Z_DYNLIB2;}
-
-/*-------------------------------------------------------------------------
- * Function:	H5Z_filter_dynlib2
- *
- * Purpose:	A dynlib2 filter method that multiplies the original value 
- *              during write and divide the original value during read. It
- *              will be built as a shared library.  plugin.c test will load 
- *              and use this filter library.    
- *
- * Return:	Success:	Data chunk size
- *
- *		Failure:	0
- *
- * Programmer:	Raymond Lu
- *              29 March 2013
- *
- *-------------------------------------------------------------------------
- */
-static size_t
-H5Z_filter_dynlib2(unsigned int flags, size_t cd_nelmts,
-      const unsigned int *cd_values, size_t nbytes,
-      size_t *buf_size, void **buf)
-{
-    int *int_ptr = (int *)*buf;          /* Pointer to the data values */
-    size_t buf_left = *buf_size;  /* Amount of data buffer left to process */
-
-    /* Check for the correct number of parameters */
-    if(cd_nelmts > 0)
-        return(0);
-
-    /* Assignment to eliminate unused parameter warning. */
-    cd_values = cd_values;
-
-    if(flags & H5Z_FLAG_REVERSE) { /*read*/
-        /* Divide the original value with MULTIPLIER */
-        while(buf_left > 0) {
-            *int_ptr++ /= MULTIPLIER;
-            buf_left -= sizeof(int);
-        } /* end while */
-    } /* end if */
-    else { /*write*/
-        /* Multiply the original value with MULTIPLIER */
-        while(buf_left > 0) {
-            *int_ptr++ *= MULTIPLIER;
-            buf_left -= sizeof(int);
-        } /* end while */
-    } /* end else */
-
-    return nbytes;
-} /* end H5Z_filter_dynlib2() */
-
diff --git a/test/dynlib3.c b/test/dynlib3.c
deleted file mode 100644
index 8871321..0000000
--- a/test/dynlib3.c
+++ /dev/null
@@ -1,103 +0,0 @@
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Copyright by The HDF Group.                                               *
- * All rights reserved.                                                      *
- *                                                                           *
- * This file is part of HDF5. The full HDF5 copyright notice, including      *
- * terms governing use, modification, and redistribution, is contained in    *
- * the COPYING file, which can be found at the root of the source code       *
- * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
- * If you do not have access to either file, you may request a copy from     *
- * help@hdfgroup.org.                                                        *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/*
- * Programmer:	Raymond Lu
- *		1 April 2013
- *
- * Purpose:	Tests the plugin module (H5PL)
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
-#include "H5PLextern.h"
-
-#define H5Z_FILTER_DYNLIB3      259
-#define SUFFIX_LEN              8
-#define GROUP_SUFFIX            ".h5group"
-
-static size_t H5Z_filter_dynlib3(unsigned int flags, size_t cd_nelmts,
-                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
-
-/* This message derives from H5Z */
-const H5Z_class2_t H5Z_DYNLIB3[1] = {{
-    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
-    H5Z_FILTER_DYNLIB3,		     /* Filter id number		*/
-    1, 1,                            /* Encoding and decoding enabled   */
-    "dynlib3",			     /* Filter name for debugging	*/
-    NULL,                            /* The "can apply" callback        */
-    NULL,                            /* The "set local" callback        */
-    (H5Z_func_t)H5Z_filter_dynlib3,    /* The actual filter function	*/
-}};
-
-H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
-const void   *H5PLget_plugin_info(void) {return H5Z_DYNLIB3;}
-
-/*-------------------------------------------------------------------------
- * Function:	H5Z_filter_dynlib3
- *
- * Purpose:	A dynlib3 filter method that is used to test groups.  It 
- *              appends the suffix ".h5group" to each group name during 
- *              write and takes it out during read.
- *
- * Return:	Success:	Data chunk size
- *
- *		Failure:	0
- *
- * Programmer:	Raymond Lu
- *              1 April 2013
- *
- *-------------------------------------------------------------------------
- */
-static size_t
-H5Z_filter_dynlib3(unsigned int flags, size_t cd_nelmts,
-      const unsigned int *cd_values, size_t nbytes,
-      size_t *buf_size, void **buf)
-{
-    size_t   ret_value;         /* Return value */
-
-    /* Check for the correct number of parameters */
-    if(cd_nelmts > 0)
-        return(0);
-
-    /* Assignment to eliminate unused parameter warning. */
-    cd_values = cd_values;
-
-    if(flags & H5Z_FLAG_REVERSE) { /*read*/
-        ret_value = *buf_size = nbytes - SUFFIX_LEN;
-    } /* end if */
-    else { /*write*/
-        void    *outbuf = NULL;     /* Pointer to new buffer */
-        unsigned char *dst;         /* Temporary pointer to destination buffer */
-
-	dst = (unsigned char *)(outbuf = H5allocate_memory(nbytes + SUFFIX_LEN, 0));
-
-        /* Copy raw data */
-        memcpy((void*)dst, (void*)(*buf), nbytes);
-
-        /* Append suffix to raw data for storage */
-        dst += nbytes;
-        memcpy(dst, (void*)GROUP_SUFFIX, SUFFIX_LEN);
-
-        /* Free input buffer */
- 	H5free_memory(*buf);
-
-        /* Set return values */
-        *buf_size = nbytes + SUFFIX_LEN;
-	*buf = outbuf;
-	outbuf = NULL;
-	ret_value = *buf_size;
-    } /* end else */
-
-    return ret_value;
-} /* H5Z_filter_dynlib3() */
-
diff --git a/test/dynlib4.c b/test/dynlib4.c
deleted file mode 100644
index 06d90ff..0000000
--- a/test/dynlib4.c
+++ /dev/null
@@ -1,102 +0,0 @@
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Copyright by The HDF Group.                                               *
- * All rights reserved.                                                      *
- *                                                                           *
- * This file is part of HDF5. The full HDF5 copyright notice, including      *
- * terms governing use, modification, and redistribution, is contained in    *
- * the COPYING file, which can be found at the root of the source code       *
- * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
- * If you do not have access to either file, you may request a copy from     *
- * help@hdfgroup.org.                                                        *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/*
- * Purpose:    Tests the plugin module (H5PL)
- */
-
-#include <stdlib.h>
-#include <stdio.h>
-#include "H5PLextern.h"
-
-#define H5Z_FILTER_DYNLIB4      260
-
-#define PUSH_ERR(func, minor, str) H5Epush2(H5E_DEFAULT, __FILE__, func, __LINE__, H5E_ERR_CLS, H5E_PLUGIN, minor, str)
-
-static size_t H5Z_filter_dynlib4(unsigned int flags, size_t cd_nelmts,
-                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
-
-/* This message derives from H5Z */
-const H5Z_class2_t H5Z_DYNLIB4[1] = {{
-    H5Z_CLASS_T_VERS,                /* H5Z_class_t version             */
-    H5Z_FILTER_DYNLIB4,             /* Filter id number        */
-    1, 1,                            /* Encoding and decoding enabled   */
-    "dynlib4",                 /* Filter name for debugging    */
-    NULL,                            /* The "can apply" callback        */
-    NULL,                            /* The "set local" callback        */
-    (H5Z_func_t)H5Z_filter_dynlib4,    /* The actual filter function    */
-}};
-
-H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
-const void    *H5PLget_plugin_info(void) {return H5Z_DYNLIB4;}
-
-/*-------------------------------------------------------------------------
- * Function:    H5Z_filter_dynlib4
- *
- * Purpose:    A dynlib4 filter method that adds on and subtract from
- *              the original value with another value.  It will be built
- *              as a shared library.  plugin.c test will load and use
- *              this filter library. Designed to call a HDF function.
- *
- * Return:    Success:    Data chunk size
- *
- *        Failure:    0
- *
- *-------------------------------------------------------------------------
- */
-static size_t
-H5Z_filter_dynlib4(unsigned int flags, size_t cd_nelmts,
-      const unsigned int *cd_values, size_t nbytes,
-      size_t *buf_size, void **buf)
-{
-    int *int_ptr = (int *)*buf;          /* Pointer to the data values */
-    size_t buf_left = *buf_size;  /* Amount of data buffer left to process */
-    int add_on = 0;
-    unsigned ver_info[3];
-
-    /* Check for the library version */
-    if(H5get_libversion(&ver_info[0], &ver_info[1], &ver_info[2]) < 0) {
-        PUSH_ERR("dynlib4", H5E_CALLBACK, "H5get_libversion");
-        return(0);
-    }
-    /* Check for the correct number of parameters */
-    if(cd_nelmts == 0)
-        return(0);
-
-    /* Check that permanent parameters are set correctly */
-    if(cd_values[0] > 9)
-        return(0);
-
-    if(ver_info[0] != cd_values[1] || ver_info[1] != cd_values[2]) {
-        PUSH_ERR("dynlib4", H5E_CALLBACK, "H5get_libversion does not match");
-        return(0);
-    }
-
-    add_on = (int)cd_values[0];
-
-    if(flags & H5Z_FLAG_REVERSE) { /*read*/
-        /* Substract the "add on" value to all the data values */
-        while(buf_left > 0) {
-            *int_ptr++ -= add_on;
-            buf_left -= sizeof(int);
-        } /* end while */
-    } /* end if */
-    else { /*write*/
-        /* Add the "add on" value to all the data values */
-        while(buf_left > 0) {
-            *int_ptr++ += add_on;
-            buf_left -= sizeof(int);
-        } /* end while */
-    } /* end else */
-
-    return nbytes;
-} /* end H5Z_filter_dynlib4() */
-
diff --git a/test/filter_plugin.c b/test/filter_plugin.c
new file mode 100644
index 0000000..8b7e0e4
--- /dev/null
+++ b/test/filter_plugin.c
@@ -0,0 +1,1511 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/*
+ * Purpose:    Tests the plugin module (H5PL)
+ */
+
+#include "h5test.h"
+#include "H5srcdir.h"
+
+/*
+ * This file needs to access private datatypes from the H5Z and H5PL package.
+ */
+#define H5PL_FRIEND
+#include "H5PLpkg.h"
+#define H5Z_FRIEND
+#include "H5Zpkg.h"
+
+/* Filters IDs for test filter plugins */
+#define FILTER1_ID          257
+#define FILTER2_ID          258
+#define FILTER3_ID          259
+#define FILTER4_ID          260
+
+const char *FILENAME[] = {
+    "filter_plugin",
+    NULL
+};
+#define FILENAME_BUF_SIZE       1024
+
+/* Dataset names */
+#define DSET_DEFLATE_NAME    "deflate dset"
+#define DSET_FILTER1_NAME    "filter 1 dset"
+#define DSET_FILTER2_NAME    "filter 2 dset"
+#define DSET_FILTER3_NAME    "filter 3 dset"
+
+/* Array sizes used throughout the test */
+#define DSET_DIM1               100
+#define DSET_DIM2               200
+#define CHUNK_DIM1              2
+#define CHUNK_DIM2              25
+#define HYPERSLAB_OFFSET1       7
+#define HYPERSLAB_OFFSET2       30
+#define HYPERSLAB_SIZE1         4
+#define HYPERSLAB_SIZE2         50
+
+/* Global size arrays */
+const hsize_t sizes_g[2] = {DSET_DIM1, DSET_DIM2};                      /* Dataset dimensions   */
+const hsize_t hs_sizes_g[2] = {HYPERSLAB_SIZE1, HYPERSLAB_SIZE2};       /* Hyperslab sizes      */
+const hsize_t hs_offsets_g[2] = {HYPERSLAB_OFFSET1, HYPERSLAB_OFFSET2}; /* Hyperslab offsets    */
+const hsize_t chunk_sizes_g[2] = {CHUNK_DIM1, CHUNK_DIM2};              /* Chunk dimensions     */
+
+/* Limit random number within 20000 */
+#define RANDOM_LIMIT    20000
+
+/* Things used in the groups + filter plugins test */
+#define N_SUBGROUPS             1000
+#define SUBGROUP_PREFIX         "subgroup_"
+#define TOP_LEVEL_GROUP_NAME    "top-level group"
+
+/* Global arrays in which to save data */
+int **orig_deflate_g  = NULL;
+int **orig_dynlib1_g  = NULL;
+int **orig_dynlib2_g  = NULL;
+int **orig_dynlib4_g  = NULL;
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:  free_2D_array
+ *
+ * Purpose:   Free up a dynamic 2D pseudo array and set the pointer to NULL
+ *            Designed to be callable in error conditions so NULLs are okay
+ *
+ * Return:    SUCCEED (always)
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+free_2D_array(int ***arr) {
+
+    if (arr && *arr && (*arr)[0])
+        HDfree((*arr)[0]);
+    if (arr && *arr)
+        HDfree(*arr);
+    *arr = NULL;
+
+    return SUCCEED;
+} /* end free_2D_array() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  allocate_and_init_2D_array
+ *
+ * Purpose:   Initialize an array as a pseudo 2D array and copy in some
+ *            initial values.
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+allocate_and_init_2D_array(int ***arr, const hsize_t *sizes, int **initial_values) {
+
+    size_t r, c;        /* Data rows and columns    */
+    size_t i;           /* Iterator                 */
+    size_t n_bytes;     /* # of bytes to copy       */
+
+    r = (size_t)sizes[0];
+    c = (size_t)sizes[1];
+
+    /* Allocate and set up pseudo-2D array */
+    if (NULL == (*arr = (int **)HDcalloc(r, sizeof(int *))))
+        TEST_ERROR;
+    if (NULL == ((*arr)[0] = (int *)HDcalloc(r * c, sizeof(int))))
+        TEST_ERROR;
+    for (i = 0; i < r; i++)
+        (*arr)[i] = (**arr + c * i);
+
+    /* Copy over the data elements */
+    if (initial_values) {
+        n_bytes = r * c * sizeof(int);
+        HDmemcpy((*arr)[0], initial_values[0], n_bytes);
+    }
+
+    return SUCCEED;
+error:
+    free_2D_array(arr);
+    
+    return FAIL;
+} /* end allocate_and_init_2D_array() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  compare_2D_arrays
+ *
+ * Purpose:   Compare two pseudo 2D arrays
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+compare_2D_arrays(int **dset1, int **dset2, const hsize_t *sizes, /*OUT*/ hbool_t *are_same) {
+    hsize_t i, j;           /* index variables */
+
+    *are_same = TRUE;
+
+    /* Check all the array values. This could optionally emit any
+     * bad data, but it's not clear how that would help debugging.
+     */
+    for (i = 0; i < sizes[0]; i++)
+        for (j = 0; j < sizes[1]; j++)
+            if (dset1[i][j] != dset2[i][j]) {
+                *are_same = FALSE;
+                return SUCCEED;
+            }
+
+    return SUCCEED;
+    
+} /* end compare_2D_arrays() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  ensure_filter_works
+ *
+ * Purpose:   Tests writing entire data and partial data with filters
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+ensure_filter_works(hid_t fid, const char *name, hid_t dcpl_id)
+{
+    hid_t           did = -1;                       /* Dataset ID                                   */
+    hid_t           dxpl_id = -1;                   /* Dataset xfer property list ID                */
+    hid_t           write_dxpl_id = -1;             /* Dataset xfer property list ID for writing    */
+    hid_t           sid = -1;                       /* Dataspace ID                                 */
+    void           *tconv_buf = NULL;               /* Temporary conversion buffer                  */
+    int           **orig = NULL;                    /* Data written to the dataset                  */
+    int           **read = NULL;                    /* Data read from the dataset                   */
+    size_t          r, c;                           /* Data rows and columns                        */
+    size_t          hs_r, hs_c, hs_offr, hs_offc;   /* Hypserslab sizes and offsets                 */
+    size_t          i, j;                           /* Local index variables                        */
+    int             n = 0;                          /* Value written to point array                 */
+    hbool_t         are_same;                       /* Output from dataset compare function         */
+    int          ***save_array = NULL;              /* (Global) array where the final data go       */
+
+    /* initialize */
+    r = (size_t)sizes_g[0];
+    c = (size_t)sizes_g[1];
+
+    /* Create the data space */
+    if ((sid = H5Screate_simple(2, sizes_g, NULL)) < 0)
+        TEST_ERROR;
+
+    /* Allocate memory for the data buffers
+     * We're using the hacky way of doing 2D arrays that uses a
+     * single data buffer but which allows normal 2D access.
+     */
+    if (allocate_and_init_2D_array(&orig, sizes_g, NULL) < 0)
+        TEST_ERROR;
+    if (allocate_and_init_2D_array(&read, sizes_g, NULL) < 0)
+        TEST_ERROR;
+
+    /* Create a small conversion buffer to test strip mining. We
+     * might as well test all we can!
+     */
+    if ((dxpl_id = H5Pcreate(H5P_DATASET_XFER)) < 0)
+        TEST_ERROR;
+    if (NULL == (tconv_buf = HDcalloc((size_t)1000, sizeof(char))))
+        TEST_ERROR;
+    if (H5Pset_buffer(dxpl_id, (size_t)1000, tconv_buf, NULL) < 0)
+        TEST_ERROR;
+    if ((write_dxpl_id = H5Pcopy(dxpl_id)) < 0)
+        TEST_ERROR;
+
+    TESTING("    filters (setup)");
+
+    /* Check if all the filters are available */
+    if (H5Pall_filters_avail(dcpl_id) != TRUE)
+        TEST_ERROR;
+
+    /* Create the dataset */
+    if ((did = H5Dcreate2(fid, name, H5T_NATIVE_INT, sid, H5P_DEFAULT, dcpl_id, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    PASSED();
+
+    /*----------------------------------------------------------------------
+     * STEP 1: Read uninitialized data.  It should be zero.
+     *----------------------------------------------------------------------
+     */
+    TESTING("    filters (uninitialized read)");
+
+    if (H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl_id, *read) < 0)
+        TEST_ERROR;
+
+    /* The input buffer was calloc'd and has not been initialized yet */
+    if (compare_2D_arrays(orig, read, sizes_g, &are_same) < 0)
+        TEST_ERROR;
+    if (FALSE == are_same)
+        TEST_ERROR;
+
+    PASSED();
+
+    /*----------------------------------------------------------------------
+     * STEP 2: Test filters by setting up a chunked dataset and writing
+     * to it.
+     *----------------------------------------------------------------------
+     */
+    TESTING("    filters (write)");
+
+    n = 0;
+    for (i = 0; i < r; i++)
+        for (j = 0; j < c; j++)
+            orig[i][j] = n++;
+
+    if (H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, write_dxpl_id, *orig) < 0)
+        TEST_ERROR;
+
+    PASSED();
+
+    /*----------------------------------------------------------------------
+     * STEP 3: Try to read the data we just wrote.
+     *----------------------------------------------------------------------
+     */
+    TESTING("    filters (read)");
+
+    /* Read the dataset back */
+    if (H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl_id, *read) < 0)
+        TEST_ERROR;
+
+    /* Check that the values read are the same as the values written */
+    if (compare_2D_arrays(orig, read, sizes_g, &are_same) < 0)
+        TEST_ERROR;
+    if (FALSE == are_same)
+        TEST_ERROR;
+
+    PASSED();
+
+    /*----------------------------------------------------------------------
+     * STEP 4: Write new data over the top of the old data.  The new data is
+     * random thus not very compressible, and will cause the chunks to move
+     * around as they grow.  We only change values for the left half of the
+     * dataset although we rewrite the whole thing.
+     *----------------------------------------------------------------------
+     */
+    TESTING("    filters (modify)");
+
+    for (i = 0; i < r; i++)
+        for (j = 0; j < c / 2; j++)
+            orig[i][j] = (int)HDrandom() % RANDOM_LIMIT;
+
+    if (H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, write_dxpl_id, *orig) < 0)
+        TEST_ERROR;
+
+    /* Read the dataset back and check it */
+    if (H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl_id, *read) < 0)
+        TEST_ERROR;
+
+    /* Check that the values read are the same as the values written */
+    if (compare_2D_arrays(orig, read, sizes_g, &are_same) < 0)
+        TEST_ERROR;
+    if (FALSE == are_same)
+        TEST_ERROR;
+
+    PASSED();
+
+    /*----------------------------------------------------------------------
+     * STEP 5: Close the dataset and then open it and read it again.  This
+     * insures that the filters message is picked up properly from the
+     * object header.
+     *----------------------------------------------------------------------
+     */
+    TESTING("    filters (re-open)");
+
+    if (H5Dclose(did) < 0)
+        TEST_ERROR;
+    if ((did = H5Dopen2(fid, name, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    if (H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl_id, *read) < 0)
+        TEST_ERROR;
+
+    /* Check that the values read are the same as the values written */
+    if (compare_2D_arrays(orig, read, sizes_g, &are_same) < 0)
+        TEST_ERROR;
+    if (FALSE == are_same)
+        TEST_ERROR;
+
+    PASSED();
+
+    /*----------------------------------------------------------------------
+     * STEP 6: Test partial I/O by writing to and then reading from a
+     * hyperslab of the dataset.  The hyperslab does not line up on chunk
+     * boundaries (we know that case already works from above tests).
+     *----------------------------------------------------------------------
+     */
+    TESTING("    filters (partial I/O)");
+
+    hs_r = (size_t)hs_sizes_g[0];
+    hs_c = (size_t)hs_sizes_g[1];
+    hs_offr = (size_t)hs_offsets_g[0];
+    hs_offc = (size_t)hs_offsets_g[1];
+    for (i = 0; i < hs_r; i++)
+        for (j = 0; j < hs_c; j++)
+            orig[hs_offr + i][hs_offc + j] = (int)HDrandom() % RANDOM_LIMIT;
+
+    if (H5Sselect_hyperslab(sid, H5S_SELECT_SET, hs_offsets_g, NULL, hs_sizes_g, NULL) < 0)
+        TEST_ERROR;
+
+    /* Use the "read" DXPL because partial I/O on corrupted data test
+     * needs to ignore errors during writing
+     */
+    if (H5Dwrite(did, H5T_NATIVE_INT, sid, sid, dxpl_id, *orig) < 0)
+        TEST_ERROR;
+
+    if (H5Dread(did, H5T_NATIVE_INT, sid, sid, dxpl_id, *read) < 0)
+        TEST_ERROR;
+
+    /* Check that the values read are the same as the values written */
+    if (compare_2D_arrays(orig, read, sizes_g, &are_same) < 0)
+        TEST_ERROR;
+    if (FALSE == are_same)
+        TEST_ERROR;
+
+    PASSED();
+
+    /* Save the data written to the file for later comparison when the file
+     * is reopened for read test.
+     */
+    if (!HDstrcmp(name, DSET_DEFLATE_NAME))
+        save_array = &orig_deflate_g;
+    else if (!HDstrcmp(name, DSET_FILTER1_NAME))
+        save_array = &orig_dynlib1_g;
+    else if (!HDstrcmp(name, DSET_FILTER2_NAME))
+        save_array = &orig_dynlib2_g;
+    else if (!HDstrcmp(name, DSET_FILTER3_NAME))
+        save_array = &orig_dynlib4_g;
+    else
+        TEST_ERROR;
+    if (allocate_and_init_2D_array(save_array, sizes_g, orig) < 0)
+        TEST_ERROR;
+
+    /* Clean up and exit */
+    if (H5Dclose(did) < 0)
+        TEST_ERROR;
+    if (H5Sclose(sid) < 0)
+        TEST_ERROR;
+    if (H5Pclose(dxpl_id) < 0)
+        TEST_ERROR;
+    if (H5Pclose(write_dxpl_id) < 0)
+        TEST_ERROR;
+
+    free_2D_array(&orig);
+    free_2D_array(&read);
+
+    HDfree(tconv_buf);
+
+    return SUCCEED;
+
+error:
+    /* Clean up objects used for this test */
+    H5E_BEGIN_TRY {
+        H5Dclose(did);
+        H5Sclose(sid);
+        H5Pclose(dxpl_id);
+        H5Pclose(write_dxpl_id);
+    } H5E_END_TRY
+
+    /* NULLs are okay here */
+    free_2D_array(&orig);
+    free_2D_array(&read);
+
+    if (tconv_buf)
+        HDfree(tconv_buf);
+
+    return FAIL;
+} /* end ensure_filter_works() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  test_dataset_write_with_filters
+ *
+ * Purpose:   Tests creating datasets and writing data with dynamically loaded filters
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+test_dataset_write_with_filters(hid_t fid)
+{
+    hid_t           dcpl_id = -1;           /* Dataset creation property list ID        */
+    unsigned int    compress_level;         /* Deflate compression level                */
+    unsigned int    filter1_data;           /* Data used by filter 1                    */
+    unsigned int    libver_values[4];       /* Used w/ the filter that makes HDF5 calls */
+
+    /*----------------------------------------------------------
+     * STEP 1: Test deflation by itself.
+     *----------------------------------------------------------
+     */
+    HDputs("Testing dataset writes with deflate filter");
+#ifdef H5_HAVE_FILTER_DEFLATE
+    if ((dcpl_id = H5Pcreate(H5P_DATASET_CREATE)) < 0)
+        TEST_ERROR;
+    if (H5Pset_chunk(dcpl_id, 2, chunk_sizes_g) < 0)
+        TEST_ERROR;
+    compress_level = 6;
+    if (H5Pset_deflate(dcpl_id, compress_level) < 0)
+        TEST_ERROR;
+
+    /* Ensure the filter works */
+    if (ensure_filter_works(fid, DSET_DEFLATE_NAME, dcpl_id) < 0)
+        TEST_ERROR;
+
+    /* Clean up objects used for this test */
+    if (H5Pclose(dcpl_id) < 0)
+        TEST_ERROR;
+#else /* H5_HAVE_FILTER_DEFLATE */
+    SKIPPED();
+    HDputs("    Deflate filter not enabled");
+#endif /* H5_HAVE_FILTER_DEFLATE */
+
+    /*----------------------------------------------------------
+     * STEP 2: Test filter plugin 1 by itself.
+     *----------------------------------------------------------
+     */
+    HDputs("    dataset writes with filter plugin 1");
+    if ((dcpl_id = H5Pcreate(H5P_DATASET_CREATE)) < 0)
+        TEST_ERROR;
+    if (H5Pset_chunk(dcpl_id, 2, chunk_sizes_g) < 0)
+        TEST_ERROR;
+
+    /* Set up the filter, passing in the amount the filter will add and subtract
+     * from each data element. Note that this value has an arbitrary max of 9.
+     */
+    filter1_data = 9;
+    if (H5Pset_filter(dcpl_id, FILTER1_ID, H5Z_FLAG_MANDATORY, (size_t)1, &filter1_data) < 0)
+        TEST_ERROR;
+
+    /* Ensure the filter works */
+    if (ensure_filter_works(fid, DSET_FILTER1_NAME, dcpl_id) < 0)
+        TEST_ERROR;
+
+    /* Clean up objects used for this test */
+    if (H5Pclose(dcpl_id) < 0)
+        TEST_ERROR;
+
+    /* Unregister the dynamic filter for testing purpose. The next time when this test is run for
+     * the new file format, the library's H5PL code has to search in the table of loaded plugin libraries
+     * for this filter.
+     */
+    if (H5Zunregister(FILTER1_ID) < 0)
+        TEST_ERROR;
+
+    /*----------------------------------------------------------
+     * STEP 3: Test filter plugin 2 by itself.
+     *----------------------------------------------------------
+     */
+    HDputs("    dataset writes with filter plugin 2");
+    if ((dcpl_id = H5Pcreate(H5P_DATASET_CREATE)) < 0)
+        TEST_ERROR;
+    if (H5Pset_chunk(dcpl_id, 2, chunk_sizes_g) < 0)
+        TEST_ERROR;
+    if (H5Pset_filter(dcpl_id, FILTER2_ID, H5Z_FLAG_MANDATORY, 0, NULL) < 0)
+        TEST_ERROR;
+
+    /* Ensure the filter works */
+    if (ensure_filter_works(fid, DSET_FILTER2_NAME, dcpl_id) < 0)
+        TEST_ERROR;
+
+    /* Clean up objects used for this test */
+    if (H5Pclose(dcpl_id) < 0)
+        TEST_ERROR;
+
+    /* Unregister the dynamic filter for testing purpose. The next time when this test is run for
+     * the new file format, the library's H5PL code has to search in the table of loaded plugin libraries
+     * for this filter.
+     */
+    if (H5Zunregister(FILTER2_ID) < 0)
+        TEST_ERROR;
+
+    /*----------------------------------------------------------
+     * STEP 4: Test filter plugin 3 by itself.
+     *         (This filter plugin makes HDF5 API calls)
+     *----------------------------------------------------------
+     */
+    HDputs("    dataset writes with filter plugin 3");
+    if ((dcpl_id = H5Pcreate(H5P_DATASET_CREATE)) < 0)
+        TEST_ERROR;
+    if (H5Pset_chunk(dcpl_id, 2, chunk_sizes_g) < 0)
+        TEST_ERROR;
+
+    /* Set the add/subtract value for the filter */
+    libver_values[0] = 9;
+
+    /* Get the library bounds and add to the filter data */
+    if (H5get_libversion(&libver_values[1], &libver_values[2], &libver_values[3]) < 0)
+        TEST_ERROR;
+    if (H5Pset_filter(dcpl_id, FILTER3_ID, H5Z_FLAG_MANDATORY, (size_t)4, libver_values) < 0)
+        TEST_ERROR;
+
+    /* Ensure the filter works */
+    if (ensure_filter_works(fid, DSET_FILTER3_NAME, dcpl_id) < 0)
+        TEST_ERROR;
+
+    /* Clean up objects used for this test */
+    if (H5Pclose(dcpl_id) < 0)
+        TEST_ERROR;
+
+    /* Unregister the dynamic filter for testing purpose. The next time when this test is run for
+     * the new file format, the library's H5PL code has to search in the table of loaded plugin libraries
+     * for this filter.
+     */
+    if (H5Zunregister(FILTER3_ID) < 0)
+        TEST_ERROR;
+
+    return SUCCEED;
+
+error:
+    /* Clean up objects used for this test */
+    H5E_BEGIN_TRY {
+        H5Pclose(dcpl_id);
+    } H5E_END_TRY
+
+    return FAIL;
+} /* end test_dataset_write_with_filters() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  test_read_data
+ *
+ * Purpose:   Tests reading data and compares values
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+test_read_data(hid_t did, int *origin_data)
+{
+    int           **check = NULL;
+    int          *data_p = origin_data;
+    size_t        i, j;        /* Local index variables */
+
+    if (allocate_and_init_2D_array(&check, sizes_g, NULL) < 0)
+        TEST_ERROR;
+
+    /* Read the dataset back */
+    if (H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, *check) < 0)
+        TEST_ERROR;
+
+    /* Check that the values read are the same as the values written */
+    for(i = 0; i < sizes_g[0]; i++)
+        for(j = 0; j < sizes_g[1]; j++) {
+            if(*data_p != check[i][j])
+                TEST_ERROR
+            data_p++;
+        }
+
+    free_2D_array(&check);
+
+    PASSED();
+    
+    return SUCCEED;
+
+error:
+    free_2D_array(&check);
+
+    return FAIL;
+} /* end test_read_data() */
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:  test_dataset_read_with_filters
+ *
+ * Purpose:   Tests reading datasets created with dynamically-loaded
+ *            filter plugins.
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+test_dataset_read_with_filters(hid_t fid)
+{
+    hid_t   did = -1;                   /* Dataset ID */
+
+    /*----------------------------------------------------------
+     * STEP 1: Test deflation by itself.
+     *----------------------------------------------------------
+     */
+    TESTING("dataset read I/O with deflate filter");
+
+#ifdef H5_HAVE_FILTER_DEFLATE
+    if (H5Zfilter_avail(H5Z_FILTER_DEFLATE) != TRUE)
+        TEST_ERROR;
+
+    if ((did = H5Dopen2(fid, DSET_DEFLATE_NAME, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    if (test_read_data(did, orig_deflate_g[0]) < 0)
+        TEST_ERROR;
+
+    if (H5Dclose(did) < 0)
+        TEST_ERROR;
+
+#else /* H5_HAVE_FILTER_DEFLATE */
+    SKIPPED();
+    HDputs("    Deflate filter not enabled");
+#endif /* H5_HAVE_FILTER_DEFLATE */
+
+    /*----------------------------------------------------------
+     * STEP 2: Test filter plugin 1 by itself.
+     *----------------------------------------------------------
+     */
+    TESTING("    dataset reads with filter plugin 1");
+
+    if ((did = H5Dopen2(fid, DSET_FILTER1_NAME, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    if (test_read_data(did, orig_dynlib1_g[0]) < 0)
+        TEST_ERROR;
+
+    if (H5Dclose(did) < 0)
+        TEST_ERROR;
+
+    /*----------------------------------------------------------
+     * STEP 3: Test filter plugin 2 by itself.
+     *----------------------------------------------------------
+     */
+    TESTING("    dataset reads with filter plugin 2");
+
+    if ((did = H5Dopen2(fid, DSET_FILTER2_NAME, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    if (test_read_data(did, orig_dynlib2_g[0]) < 0)
+        TEST_ERROR;
+
+    if (H5Dclose(did) < 0)
+        TEST_ERROR;
+
+    /*----------------------------------------------------------
+     * STEP 4: Test filter plugin 3 by itself.
+     *----------------------------------------------------------
+     */
+    TESTING("    dataset reads with filter plugin 3");
+
+    if ((did = H5Dopen2(fid, DSET_FILTER3_NAME, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    if (test_read_data(did, orig_dynlib4_g[0]) < 0)
+        TEST_ERROR;
+
+    if (H5Dclose(did) < 0)
+        TEST_ERROR;
+
+    return SUCCEED;
+
+error:
+    /* Clean up objects used for this test */
+    H5E_BEGIN_TRY {
+        H5Dclose(did);
+    } H5E_END_TRY
+
+    return FAIL;
+} /* end test_dataset_read_with_filters() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  ensure_data_read_fails
+ *
+ * Purpose:   Tests not reading data
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+ensure_data_read_fails(hid_t did)
+{
+    int       **check = NULL;
+    herr_t      ret = FAIL;
+
+    if (allocate_and_init_2D_array(&check, sizes_g, NULL) < 0)
+        TEST_ERROR;
+
+    /* Read the dataset back (should fail) */
+    H5E_BEGIN_TRY {
+        ret = H5Dread(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, *check);
+    } H5E_END_TRY
+    if(ret >= 0)
+        TEST_ERROR;
+
+    free_2D_array(&check);
+
+    PASSED();
+
+    return SUCCEED;
+
+error:
+    free_2D_array(&check);
+    return FAIL;
+} /* end ensure_data_read_fails() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  test_no_read_when_plugins_disabled
+ *
+ * Purpose:   Ensures we can't read data from a dataset that requires a
+ *            filter located in a plugin.
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+test_no_read_when_plugins_disabled(hid_t fid)
+{
+    hid_t       did = -1;               /* Dataset ID */
+    unsigned    plugin_flags;           /* Plugin access flags */
+
+    TESTING("filter plugin 1 with filter plugins disabled");
+
+    /* Get the existing plugin flags */
+    if (H5PLget_loading_state(&plugin_flags) < 0)
+        TEST_ERROR;
+
+    /* Disable filter plugins and use the new flags */
+    plugin_flags &= (unsigned)(~H5PL_FILTER_PLUGIN);
+    if (H5PLset_loading_state(plugin_flags) < 0)
+        TEST_ERROR;
+
+    /* Open a dataset that requires a filter plugin to read the data */
+    if ((did = H5Dopen2(fid, DSET_FILTER1_NAME, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    /* Make sure we can't read the data */
+    if (ensure_data_read_fails(did) < 0)
+        TEST_ERROR;
+
+    /* Close down */
+    if (H5Dclose(did) < 0)
+        TEST_ERROR;
+
+    /* Re-enable filter plugins */
+    plugin_flags |= (unsigned)H5PL_FILTER_PLUGIN;
+    if (H5PLset_loading_state(plugin_flags) < 0)
+        TEST_ERROR;
+
+    return SUCCEED;
+
+error:
+    /* Clean up objects used for this test */
+    H5E_BEGIN_TRY {
+        plugin_flags |= (unsigned)H5PL_FILTER_PLUGIN;
+        H5PLset_loading_state(plugin_flags);
+        H5Dclose(did);
+    } H5E_END_TRY
+
+    return FAIL;
+} /* end test_no_read_when_plugins_disabled() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  test_creating_groups_using_plugins
+ *
+ * Purpose:   Tests creating group with dynamically loaded filters
+ *
+ * Return:    SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+test_creating_groups_using_plugins(hid_t fid)
+{
+    hid_t    gcpl_id = -1;
+    hid_t    gid = -1;
+    hid_t    sub_gid = -1;
+    int      i;
+    char     subgroup_name[256];
+
+    TESTING("creating groups with filter plugin 4");
+
+    if ((gcpl_id = H5Pcreate(H5P_GROUP_CREATE)) < 0)
+        TEST_ERROR;
+
+    /* Use a filter plugin for creating groups */
+    if (H5Pset_filter(gcpl_id, FILTER4_ID, H5Z_FLAG_MANDATORY, (size_t)0, NULL) < 0)
+        TEST_ERROR;
+
+    /* Create a group using this filter */
+    if ((gid = H5Gcreate2(fid, TOP_LEVEL_GROUP_NAME, H5P_DEFAULT, gcpl_id, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    /* Create multiple groups under the top-level group */
+    for (i = 0; i < N_SUBGROUPS; i++) {
+        char *sp = subgroup_name;
+
+        sp += HDsprintf(subgroup_name, SUBGROUP_PREFIX);
+        HDsprintf(sp, "%d", i);
+
+        if ((sub_gid = H5Gcreate2(gid, subgroup_name, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0)
+            TEST_ERROR;
+        if (H5Gclose(sub_gid) < 0)
+            TEST_ERROR;
+    }
+
+    /* Close everything */
+    if (H5Gclose(gid) < 0)
+        TEST_ERROR;
+    if (H5Pclose(gcpl_id) < 0)
+        TEST_ERROR;
+
+    PASSED();
+
+    return SUCCEED;
+
+error:
+    /* Clean up objects used for this test */
+    H5E_BEGIN_TRY {
+        H5Gclose(sub_gid);
+        H5Gclose(gid);
+        H5Pclose(gcpl_id);
+    } H5E_END_TRY
+
+    return FAIL;
+} /* end test_creating_groups_using_plugins() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    test_opening_groups_using_plugins
+ *
+ * Purpose:     Tests opening group with dynamically loaded filters
+ *
+ * Return:      SUCCEED/FAIL
+ *
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+test_opening_groups_using_plugins(hid_t fid)
+{
+    hid_t       gid = -1;
+    hid_t       sub_gid = -1;
+    int         i;
+    char        subgroup_name[256];
+
+    TESTING("opening groups with filter plugin 4");
+
+    /* Open the top group */
+    if ((gid = H5Gopen2(fid, TOP_LEVEL_GROUP_NAME, H5P_DEFAULT)) < 0)
+        TEST_ERROR;
+
+    /* Open all the sub-groups under the top-level group */
+    for (i = 0; i < N_SUBGROUPS; i++) {
+        char *sp = subgroup_name;
+
+        sp += HDsprintf(subgroup_name, SUBGROUP_PREFIX);
+        HDsprintf(sp, "%d", i);
+
+        if ((sub_gid = H5Gopen2(gid, subgroup_name, H5P_DEFAULT)) < 0)
+            TEST_ERROR;
+        if (H5Gclose(sub_gid) < 0)
+            TEST_ERROR;
+    }
+
+    /* Close the top-level group */
+    if (H5Gclose(gid) < 0)
+        TEST_ERROR;
+
+    PASSED();
+
+    return SUCCEED;
+
+error:
+    /* Clean up objects used for this test */
+    H5E_BEGIN_TRY {
+        H5Gclose(gid);
+        H5Gclose(sub_gid);
+    } H5E_END_TRY
+
+    return FAIL;
+} /* end test_opening_groups_using_plugins() */
+
+
+
+/*-------------------------------------------------------------------------
+ * Function:  test_path_api_calls
+ *
+ * Purpose:   Tests the H5PL API calls that manipulate the plugin search
+ *            paths.
+ *
+ * Return:    SUCCEED/FAIL
+ * 
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+test_path_api_calls(void)
+{
+    unsigned int n_starting_paths;
+    unsigned int u;                 
+    unsigned int n_paths;
+    herr_t       ret;
+    ssize_t      path_len = -1;
+    char         path[256];
+    char         temp_name[256];
+
+    HDputs("Testing access to the filter path table");
+
+    if (H5Zfilter_avail(FILTER1_ID) != TRUE)
+        TEST_ERROR;
+
+    /* Set the number of paths to create for this test.
+     *
+     * This should be set high enough to ensure that at least one array
+     * expansion will take place. See H5PLpath.c for details.
+     */
+    n_starting_paths = 42;
+
+    /* Check that initialization is correct */
+    TESTING("    initialize");
+
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths != 2)
+        TEST_ERROR;
+
+    PASSED();
+
+    /****************/
+    /* H5PLremove() */
+    /****************/
+
+    /* Remove all the current paths */
+    TESTING("    remove");
+
+    /* Get the current size */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+
+    /* Remove all existing paths */
+    for (u = n_paths; u > 0; u--)
+        if (H5PLremove(u-1) < 0) {
+            HDfprintf(stderr,"    at %u: %s\n", u, path);
+            TEST_ERROR;
+        }
+
+    /* Verify the table is empty */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths > 0)
+        TEST_ERROR;
+
+    PASSED();
+
+
+    TESTING("    remove (index 0 in empty table)");
+
+    /* Try to remove index zero in an empty list (SHOULD FAIL) */
+    H5E_BEGIN_TRY {
+        ret = H5PLremove(0);
+    } H5E_END_TRY
+    if (ret >= 0)
+        TEST_ERROR;
+
+    PASSED();
+
+
+    /****************/
+    /* H5PLappend() */
+    /****************/
+
+    TESTING("    append");
+
+    /* Add a bunch of paths to the path table */
+    for (u = 0; u < n_starting_paths; u++) {
+        HDsprintf(path, "a_path_%u", u);
+        if (H5PLappend(path) < 0) {
+            HDfprintf(stderr,"    at %u: %s\n", u, path);
+            TEST_ERROR;
+        }
+    }
+
+    PASSED();
+
+
+    /**********************/
+    /* H5PLremove() again */
+    /**********************/
+
+    TESTING("    remove (index too high)");
+
+    /* Try to remove a path where the index is beyond the table capacity (SHOULD FAIL) */
+    H5E_BEGIN_TRY {
+        ret = H5PLremove(n_starting_paths);
+    } H5E_END_TRY
+
+    if (ret >= 0)
+        TEST_ERROR
+
+    PASSED();
+
+
+    /*************/
+    /* H5PLget() */
+    /*************/
+
+    TESTING("    get (path name)");
+
+    /* Get the path length by passing in NULL */
+    if ((path_len = H5PLget(0, NULL, 0)) <= 0) {
+        HDfprintf(stderr,"    get path 0 length failed\n");
+        TEST_ERROR;
+    }
+    if (path_len != 8)
+        TEST_ERROR;
+
+    /* Get the path */
+    if ((path_len = H5PLget(0, path, 256)) <= 0) {
+        HDfprintf(stderr,"    get 0 len: %u : %s\n", path_len, path);
+        TEST_ERROR;
+    }
+    if (HDstrcmp(path, "a_path_0") != 0) {
+        HDfprintf(stderr,"    get 0: %s\n", path);
+        TEST_ERROR;
+    }
+
+    PASSED();
+
+
+    TESTING("    get (high and low indices)");
+
+    /* Get path at index 1 */
+    if ((path_len = H5PLget(1, path, 256)) <= 0)
+        TEST_ERROR;
+    if (HDstrcmp(path, "a_path_1") != 0) {
+        HDfprintf(stderr,"    get 1: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Get path at the last index */
+    if ((path_len = H5PLget(n_starting_paths - 1, path, 256)) <= 0)
+        TEST_ERROR;
+    HDsprintf(temp_name, "a_path_%u", n_starting_paths - 1);
+    if (HDstrcmp(path, temp_name) != 0) {
+        HDfprintf(stderr,"    get %u: %s\n", n_starting_paths - 1, path);
+        TEST_ERROR;
+    }
+
+    PASSED();
+
+
+    TESTING("    get (index too high)");
+
+    /* Get path at the last + 1 index (SHOULD FAIL) */
+    H5E_BEGIN_TRY {
+        path_len = H5PLget(n_starting_paths, NULL, 0);
+    } H5E_END_TRY
+    if (path_len > 0)
+        TEST_ERROR;
+
+    PASSED();
+
+
+    /*****************/
+    /* H5PLprepend() */
+    /*****************/
+
+    /* We'll remove a path at an arbitrary index and then
+     * prepend a new path.
+     */
+
+    TESTING("    remove (arbitrary index 1)");
+
+    /* Remove one path */
+    if (H5PLremove(8) < 0)
+        TEST_ERROR;
+
+    /* Verify that the entries were moved */
+    if ((path_len = H5PLget(8, path, 256)) <= 0)
+        TEST_ERROR;
+    if (HDstrcmp(path, "a_path_9") != 0) {
+        HDfprintf(stderr,"    get 8: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Verify the table shrank */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths != n_starting_paths - 1)
+        TEST_ERROR;
+
+    PASSED();
+
+
+    TESTING("    prepend");
+
+    /* Prepend one path */
+    HDsprintf(path, "a_path_%d", n_starting_paths + 1);
+    if (H5PLprepend(path) < 0) {
+        HDfprintf(stderr,"    prepend %u: %s\n", n_starting_paths + 1, path);
+        TEST_ERROR;
+    }
+
+    /* Verify the table increased */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths != n_starting_paths)
+        TEST_ERROR;
+
+    /* Verify that the entries were moved */
+    if (H5PLget(8, path, 256) <= 0)
+        TEST_ERROR;
+    if (HDstrcmp(path, "a_path_7") != 0) {
+        HDfprintf(stderr,"    get 8: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Verify that the path was inserted at index zero */
+    if (H5PLget(0, path, 256) <= 0)
+        TEST_ERROR;
+    HDsprintf(temp_name, "a_path_%d", n_starting_paths + 1);
+    if (HDstrcmp(path, temp_name) != 0) {
+        HDfprintf(stderr,"    get 0: %s\n", path);
+        TEST_ERROR;
+    }
+
+    PASSED();
+
+
+    /*****************/
+    /* H5PLreplace() */
+    /*****************/
+
+    TESTING("    replace");
+
+    /* Replace one path at index 1 */
+    HDsprintf(path, "a_path_%u", n_starting_paths + 4);
+    if (H5PLreplace(path, 1) < 0) {
+        HDfprintf(stderr,"    replace 1: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Verify the table size remained the same */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths != n_starting_paths)
+        TEST_ERROR;
+
+    /* Verify that the entries were not moved by
+     * inspecting the paths at indices +/- 1.
+     */
+
+    /* Check path at index 0 */
+    if (H5PLget(0, path, 256) <= 0)
+        TEST_ERROR;
+    HDsprintf(temp_name, "a_path_%u", n_starting_paths + 1);
+    if (HDstrcmp(path, temp_name) != 0) {
+        HDfprintf(stderr,"    get 0: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Check path at index 2 */
+    if (H5PLget(2, path, 256) <= 0)
+        TEST_ERROR;
+    if (HDstrcmp(path, "a_path_1") != 0) {
+        HDfprintf(stderr,"    get 2: %s\n", path);
+        TEST_ERROR;
+    }
+
+    PASSED();
+
+
+    /****************/
+    /* H5PLinsert() */
+    /****************/
+
+    /* We'll remove a path at an arbitrary index and then
+     * insert a new path.
+     */
+
+    TESTING("    remove (arbitrary index 2)");
+
+    /* Remove one path */
+    if (H5PLremove(4) < 0)
+        TEST_ERROR;
+
+    /* Verify that the entries were moved */
+    if (H5PLget(4, path, 256) <= 0)
+        TEST_ERROR;
+    if (HDstrcmp(path, "a_path_4") != 0) {
+        HDfprintf(stderr,"    get 4: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Verify the table size */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths != n_starting_paths - 1)
+        TEST_ERROR;
+    PASSED();
+
+
+    TESTING("    insert");
+
+    /* Insert one path at index 3*/
+    HDsprintf(path, "a_path_%d", n_starting_paths + 5);
+    if (H5PLinsert(path, 3) < 0) {
+        HDfprintf(stderr,"    insert 3: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Verify that the entries were moved */
+    if (H5PLget(4, path, 256) <= 0)
+        TEST_ERROR;
+    if (HDstrcmp(path, "a_path_2") != 0) {
+        HDfprintf(stderr,"    get 4: %s\n", path);
+        TEST_ERROR;
+    }
+
+    /* Verify the table size increased */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths != n_starting_paths)
+        TEST_ERROR;
+
+    PASSED();
+
+
+    /****************/
+    /* H5PLremove() */
+    /****************/
+
+    /* Remove all the current paths */
+    TESTING("    remove (all)");
+
+    /* Get the current size */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+
+    /* Remove all existing paths */
+    for (u = n_paths; u > 0; u--)
+        if (H5PLremove(u-1) < 0) {
+            HDfprintf(stderr,"    at %u: %s\n", u, path);
+            TEST_ERROR;
+        }
+
+    /* Verify the table is empty */
+    if (H5PLsize(&n_paths) < 0)
+        TEST_ERROR;
+    if (n_paths > 0)
+        TEST_ERROR;
+
+    PASSED();
+
+
+    return SUCCEED;
+
+error:
+    return FAIL;
+} /* end test_path_api_calls() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:  disable_chunk_cache
+ *
+ * Purpose:   Turns the chunk cache off
+ *
+ * Return:    SUCCEED/FAIL
+ * 
+ *-------------------------------------------------------------------------
+ */
+static herr_t
+disable_chunk_cache(hid_t fapl_id) {
+    int         mdc_nelmts;
+    size_t      rdcc_nelmts;
+    size_t      rdcc_nbytes;
+    double      rdcc_w0;
+
+    if (H5Pget_cache(fapl_id, &mdc_nelmts, &rdcc_nelmts, &rdcc_nbytes, &rdcc_w0) < 0)
+        TEST_ERROR;
+    rdcc_nbytes = 0;
+    if (H5Pset_cache(fapl_id, mdc_nelmts, rdcc_nelmts, rdcc_nbytes, rdcc_w0) < 0)
+        TEST_ERROR;
+
+    return SUCCEED;
+error:
+    return FAIL;
+} /* end disable_chunk_cache() */
+
+
+/*-------------------------------------------------------------------------
+ * Function:    main
+ *
+ * Purpose:     Tests the plugin module (H5PL)
+ *
+ * Return:      EXIT_SUCCESS/EXIT_FAILURE
+ *
+ *-------------------------------------------------------------------------
+ */
+int
+main(void)
+{
+    char        filename[FILENAME_BUF_SIZE];
+    hid_t       fid = -1;
+    hid_t       old_ff_fapl_id = -1;
+    hid_t       new_ff_fapl_id = -1;
+    unsigned    new_format;
+    int         nerrors = 0;
+
+    /* Testing setup */
+    h5_reset();
+
+    /*******************************************************************/
+    /* ENSURE THAT WRITING TO DATASETS AND CREATING GROUPS WORKS       */
+    /*******************************************************************/
+
+    /* Get a VFD-dependent filename */
+    if ((old_ff_fapl_id = h5_fileaccess()) < 0)
+        TEST_ERROR;
+
+    /* Turn off the chunk cache, so all the chunks are immediately written to disk */
+    if (disable_chunk_cache(old_ff_fapl_id) < 0)
+        TEST_ERROR;
+
+    /* Copy the file access property list and set the latest file format on it */
+    if ((new_ff_fapl_id = H5Pcopy(old_ff_fapl_id)) < 0)
+        TEST_ERROR;
+    if (H5Pset_libver_bounds(new_ff_fapl_id, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
+        TEST_ERROR;
+
+    /* Fix up the filename for the VFD */
+    h5_fixname(FILENAME[0], old_ff_fapl_id, filename, sizeof(filename));
+
+    /* Test with old & new format groups */
+    for (new_format = FALSE; new_format <= TRUE; new_format++) {
+        hid_t my_fapl_id;
+
+        /* Set the FAPL for the type of format */
+        if (new_format) {
+            HDputs("\nTesting with new file format:");
+            my_fapl_id = new_ff_fapl_id;
+        }
+        else {
+            HDputs("Testing with old file format:");
+            my_fapl_id = old_ff_fapl_id;
+        }
+
+        /* Create the file for this test */
+        if ((fid = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, my_fapl_id)) < 0)
+            TEST_ERROR;
+
+        /* Test creating datasets and writing to them using plugin filters */
+        nerrors += (test_dataset_write_with_filters(fid) < 0 ? 1 : 0);
+
+        /* Test creating groups using dynamically-loaded plugin filters */
+        nerrors += (test_creating_groups_using_plugins(fid) < 0 ? 1 : 0);
+
+        if (H5Fclose(fid) < 0)
+            TEST_ERROR;
+    } /* end for */
+
+    /* Close FAPLs */
+    if (H5Pclose(old_ff_fapl_id) < 0)
+        TEST_ERROR;
+    if (H5Pclose(new_ff_fapl_id) < 0)
+        TEST_ERROR;
+
+    /* Restore the default error handler (set in h5_reset()) */
+    h5_restore_err();
+
+    /*******************************************************************/
+    /* ENSURE THAT READING FROM DATASETS AND OPENING GROUPS WORKS      */
+    /*******************************************************************/
+
+    HDputs("\nTesting reading data with with dynamic plugin filters:");
+
+    /* Close the library so that all loaded plugin libraries are unloaded */
+    h5_reset();
+    if ((old_ff_fapl_id = h5_fileaccess()) < 0)
+        TEST_ERROR;
+
+    /* Reopen the file for testing data reading */
+    if ((fid = H5Fopen(filename, H5F_ACC_RDONLY, old_ff_fapl_id)) < 0)
+        TEST_ERROR;
+
+    /* Read the data with filters */
+    nerrors += (test_dataset_read_with_filters(fid) < 0 ? 1 : 0);
+
+    /* Test creating groups using dynamically-loaded plugin filters */
+    nerrors += (test_opening_groups_using_plugins(fid) < 0  ? 1 : 0);
+
+    /* Restore the default error handler (set in h5_reset()) */
+    h5_restore_err();
+
+    /*******************************************************************/
+    /* ENSURE THAT DISABLING FILTER PLUGINS VIA THE FILTER FLAGS WORKS */
+    /*******************************************************************/
+
+    /* Close the library so that all loaded plugin libraries are unloaded */
+    h5_reset();
+    if ((old_ff_fapl_id = h5_fileaccess()) < 0)
+        TEST_ERROR;
+
+    /* Reopen the file for testing data reading */
+    if ((fid = H5Fopen(filename, H5F_ACC_RDONLY, old_ff_fapl_id)) < 0)
+        TEST_ERROR;
+
+    /* When filters are disabled, make sure we can't read data from a
+     * dataset that requires a filter plugin.
+     */
+    nerrors += (test_no_read_when_plugins_disabled(fid) < 0  ? 1 : 0);
+
+    if (H5Fclose(fid) < 0)
+        TEST_ERROR;
+
+    /************************************/
+    /* TEST THE FILTER PLUGIN API CALLS */
+    /************************************/
+
+    /* Test the APIs for access to the filter plugin path table */
+    nerrors += (test_path_api_calls() < 0  ? 1 : 0);
+
+    /*********************/
+    /* CLEAN UP AND EXIT */
+    /*********************/
+
+    /* Free up saved arrays */
+    free_2D_array(&orig_deflate_g);
+    free_2D_array(&orig_dynlib1_g);
+    free_2D_array(&orig_dynlib2_g);
+    free_2D_array(&orig_dynlib4_g);
+
+    if (nerrors)
+        TEST_ERROR;
+
+    HDprintf("All plugin tests passed.\n");
+    h5_cleanup(FILENAME, old_ff_fapl_id);
+
+    HDexit(EXIT_SUCCESS);
+
+error:
+    H5E_BEGIN_TRY {
+        H5Fclose(fid);
+        H5Pclose(old_ff_fapl_id);
+        H5Pclose(new_ff_fapl_id);
+    } H5E_END_TRY
+
+    /* Free up saved arrays (NULLs okay) */
+    free_2D_array(&orig_deflate_g);
+    free_2D_array(&orig_dynlib1_g);
+    free_2D_array(&orig_dynlib2_g);
+    free_2D_array(&orig_dynlib4_g);
+
+    nerrors = MAX(1, nerrors);
+    HDprintf("***** %d PLUGIN TEST%s FAILED! *****\n", nerrors, 1 == nerrors ? "" : "S");
+    HDexit(EXIT_FAILURE);
+} /* end main() */
+
diff --git a/test/filter_plugin1_dsets.c b/test/filter_plugin1_dsets.c
new file mode 100644
index 0000000..b74e086
--- /dev/null
+++ b/test/filter_plugin1_dsets.c
@@ -0,0 +1,93 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose:	Test dataset filter plugin for the filter_pluging.c test.
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "H5PLextern.h"
+
+#define FILTER1_ID              257
+
+static size_t add_sub_value(unsigned int flags, size_t cd_nelmts,
+        const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* Filter class struct */
+const H5Z_class2_t FILTER_INFO[1] = {{
+    H5Z_CLASS_T_VERS,                   /* H5Z_class_t version              */
+    FILTER1_ID,                         /* Filter ID number                 */
+    1,                                  /* Encoding enabled                 */
+    1,                                  /* Decoding enabled                 */
+    "test filter plugin 1",             /* Filter name for debugging        */
+    NULL,                               /* The "can apply" callback         */
+    NULL,                               /* The "set local" callback         */
+    (H5Z_func_t)add_sub_value,          /* The actual filter function       */
+}};
+
+H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void    *H5PLget_plugin_info(void) {return FILTER_INFO;}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	add_sub_value
+ *
+ * Purpose:     On write:
+ *                  Adds a caller-supplied value to the element
+ *              On read:
+ *                  Subtracts a caller-supplied value from the element
+ *
+ * Return:      Success:    Data chunk size in bytes
+ *              Failure:    0
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+add_sub_value(unsigned int flags, size_t cd_nelmts, const unsigned int *cd_values,
+        size_t nbytes, size_t *buf_size, void **buf)
+{
+    int *int_ptr = (int *)*buf;         /* Pointer to the data values               */
+    size_t buf_left = *buf_size;        /* Amount of data buffer left to process    */
+    int value = 0;                      /* Data value to add/subtract               */
+
+    /* Check for the correct number of parameters */
+    if (0 == cd_nelmts)
+        return 0;
+
+    /* Check that permanent parameters are set correctly */
+    if (cd_values[0] > 9)
+        return 0;
+  
+    value = (int)cd_values[0];
+
+    if (flags & H5Z_FLAG_REVERSE) {
+        /* READ - Substract the given value from all the data values */
+        while (buf_left > 0) {
+            *int_ptr++ -= value;
+            buf_left -= sizeof(int);
+        }
+    }
+    else {
+        /* WRITE - Add the given value to all the data values */
+        while (buf_left > 0) {
+            *int_ptr++ += value;
+            buf_left -= sizeof(int);
+        }
+    }
+
+    return nbytes;
+
+} /* end add_sub_value() */
+
diff --git a/test/filter_plugin2_dsets.c b/test/filter_plugin2_dsets.c
new file mode 100644
index 0000000..6a79148
--- /dev/null
+++ b/test/filter_plugin2_dsets.c
@@ -0,0 +1,88 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose:	Test dataset filter plugin for the filter_pluging.c test.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "H5PLextern.h"
+
+#define FILTER2_ID              258
+#define MULTIPLIER              3
+
+static size_t mult_div_value(unsigned int flags, size_t cd_nelmts,
+        const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* Filter class struct */
+const H5Z_class2_t FILTER_INFO[1] = {{
+    H5Z_CLASS_T_VERS,                   /* H5Z_class_t version              */
+    FILTER2_ID,                         /* Filter ID number                 */
+    1,                                  /* Encoding enabled                 */
+    1,                                  /* Decoding enabled                 */
+    "test filter plugin 2",             /* Filter name for debugging        */
+    NULL,                               /* The "can apply" callback         */
+    NULL,                               /* The "set local" callback         */
+    (H5Z_func_t)mult_div_value,         /* The actual filter function       */
+}};
+
+H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void    *H5PLget_plugin_info(void) {return FILTER_INFO;}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	mult_div_value
+ *
+ * Purpose:     On write:
+ *                  Multiplies an element by a constant value.
+ *              On read:
+ *                  Divides an element by a constant value.
+ *
+ * Return:      Success:    Data chunk size in bytes
+ *              Failure:    0
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+mult_div_value(unsigned int flags, size_t cd_nelmts,
+        const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf)
+{
+    int *int_ptr = (int *)*buf;         /* Pointer to the data values               */
+    size_t buf_left = *buf_size;        /* Amount of data buffer left to process    */
+
+    /* Check for the correct number of parameters */
+    if (cd_nelmts > 0)
+        return 0;
+
+    /* Assignment to eliminate unused parameter warning */
+    cd_values = cd_values;
+
+    if (flags & H5Z_FLAG_REVERSE) {
+        /* READ - Divide the original value by MULTIPLIER */
+        while (buf_left > 0) {
+            *int_ptr++ /= MULTIPLIER;
+            buf_left -= sizeof(int);
+        }
+    }
+    else {
+        /* WRITE - Multiply the original value by MULTIPLIER */
+        while (buf_left > 0) {
+            *int_ptr++ *= MULTIPLIER;
+            buf_left -= sizeof(int);
+        }
+    }
+
+    return nbytes;
+} /* end mult_div_value() */
+
diff --git a/test/filter_plugin3_dsets.c b/test/filter_plugin3_dsets.c
new file mode 100644
index 0000000..b43020f
--- /dev/null
+++ b/test/filter_plugin3_dsets.c
@@ -0,0 +1,119 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose:	Test dataset filter plugin for the filter_pluging.c test.
+ *          This filter makes an HDF5 API call to ensure that works correctly.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "H5PLextern.h"
+
+#define FILTER3_ID              259
+
+#define PUSH_ERR(func, minor, str) H5Epush2(H5E_DEFAULT, __FILE__, func, __LINE__, H5E_ERR_CLS, H5E_PLUGIN, minor, str)
+
+static size_t add_sub_value_hdf5(unsigned int flags, size_t cd_nelmts,
+                const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* Filter class struct */
+const H5Z_class2_t FILTER_INFO[1] = {{
+    H5Z_CLASS_T_VERS,                   /* H5Z_class_t version              */
+    FILTER3_ID,                         /* Filter ID number                 */
+    1,                                  /* Encoding enabled                 */
+    1,                                  /* Decoding enabled                 */
+    "test filter plugin 3",             /* Filter name for debugging        */
+    NULL,                               /* The "can apply" callback         */
+    NULL,                               /* The "set local" callback         */
+    (H5Z_func_t)add_sub_value_hdf5,     /* The actual filter function       */
+}};
+
+H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void    *H5PLget_plugin_info(void) {return FILTER_INFO;}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	add_sub_value_hdf5
+ *
+ * Purpose:     On write:
+ *                  Adds a caller-supplied value to the element
+ *              On read:
+ *                  Subtracts a caller-supplied value from the element
+ *
+ *              NOTE:   This filter is identical to filter #1 only it makes
+ *                      an HDF5 library call to ensure doing that doesn't
+ *                      cause problems.
+ *
+ * Return:      Success:    Data chunk size in bytes
+ *              Failure:    0
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+add_sub_value_hdf5(unsigned int flags, size_t cd_nelmts, const unsigned int *cd_values,
+        size_t nbytes, size_t *buf_size, void **buf)
+{
+    int *int_ptr = (int *)*buf;         /* Pointer to the data values               */
+    size_t buf_left = *buf_size;        /* Amount of data buffer left to process    */
+    int value = 0;                      /* Data value to add/subtract               */
+    unsigned majnum = 0;                /* Output data from the HDF5 library call   */
+    unsigned minnum = 0;
+    unsigned relnum = 0;
+
+    /* Check for the library version.
+     * We don't do anything with this information - it's just to ensure that
+     * HDF5 library calls work properly from inside filter plugins.
+     */
+    if (H5get_libversion(&majnum, &minnum, &relnum) < 0) {
+        PUSH_ERR("filter plugin 3", H5E_CALLBACK, "H5get_libversion");
+        return 0;
+    }
+
+    /* Check for the correct number of parameters */
+    if (cd_nelmts == 0)
+        return 0;
+
+    /* Check that permanent parameters are set correctly */
+    if (cd_values[0] > 9)
+        return 0;
+
+    /* Ensure that the version numbers match what was passed in.
+     * Again, this is trivial work, just to ensure that the library calls are
+     * working properly.
+     */
+    if (majnum != cd_values[1] || minnum != cd_values[2]) {
+        PUSH_ERR("filter plugin 3", H5E_CALLBACK, "library versions do not match");
+        return 0;
+    }
+
+    value = (int)cd_values[0];
+
+    if (flags & H5Z_FLAG_REVERSE) {
+        /* READ - Substract the given value from all the data values */
+        while (buf_left > 0) {
+            *int_ptr++ -= value;
+            buf_left -= sizeof(int);
+        }
+    }
+    else {
+        /* WRITE - Add the given value to all the data values */
+        while (buf_left > 0) {
+            *int_ptr++ += value;
+            buf_left -= sizeof(int);
+        }
+    }
+
+    return nbytes;
+} /* end add_sub_value_hdf5() */
+
diff --git a/test/filter_plugin4_groups.c b/test/filter_plugin4_groups.c
new file mode 100644
index 0000000..88ea20d
--- /dev/null
+++ b/test/filter_plugin4_groups.c
@@ -0,0 +1,106 @@
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group.                                               *
+ * All rights reserved.                                                      *
+ *                                                                           *
+ * This file is part of HDF5. The full HDF5 copyright notice, including      *
+ * terms governing use, modification, and redistribution, is contained in    *
+ * the COPYING file, which can be found at the root of the source code       *
+ * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
+ * If you do not have access to either file, you may request a copy from     *
+ * help@hdfgroup.org.                                                        *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
+/*
+ * Purpose:	Test group filter plugin for the filter_pluging.c test.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "H5PLextern.h"
+
+#define FILTER4_ID              260
+#define SUFFIX_LEN              8
+#define GROUP_SUFFIX            ".h5group"
+
+static size_t append_to_group_name(unsigned int flags, size_t cd_nelmts,
+        const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* Filter class struct */
+const H5Z_class2_t FILTER_INFO[1] = {{
+    H5Z_CLASS_T_VERS,                   /* H5Z_class_t version              */
+    FILTER4_ID,                         /* Filter ID number                 */
+    1,                                  /* Encoding enabled                 */
+    1,                                  /* Decoding enabled                 */
+    "test filter plugin 4",             /* Filter name for debugging        */
+    NULL,                               /* The "can apply" callback         */
+    NULL,                               /* The "set local" callback         */
+    (H5Z_func_t)append_to_group_name,   /* The actual filter function       */
+}};
+
+H5PL_type_t   H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void    *H5PLget_plugin_info(void) {return FILTER_INFO;}
+
+
+/*-------------------------------------------------------------------------
+ * Function:	append_to_group_name
+ *
+ * Purpose:     On write:
+ *                  Appends the suffix ".h5group" to the group name
+ *              On read:
+ *                  Removes the ".h5group" suffix from the group name
+ *
+ * Return:      Success:    Data size in bytes
+ *              Failure:    0
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+append_to_group_name(unsigned int flags, size_t cd_nelmts,
+        const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf)
+{
+    size_t   new_name_size = 0;             /* Return value */
+
+    /* Check for the correct number of parameters */
+    if (cd_nelmts > 0)
+        return 0;
+
+    /* Assignment to eliminate unused parameter warning. */
+    cd_values = cd_values;
+
+    if (flags & H5Z_FLAG_REVERSE) {
+        /* READ - Remove the suffix from the group name */
+        new_name_size = *buf_size = nbytes - SUFFIX_LEN;
+    }
+    else {
+        /* WRITE - Append the suffix to the group name */
+        void    *outbuf = NULL;         /* Pointer to new buffer                    */
+        unsigned char *dst = NULL;      /* Temporary pointer to destination buffer  */
+
+        /* Get memory for the new, larger string buffer using the
+         * library's memory allocator.
+         */
+        if (NULL == (dst = (unsigned char *)(outbuf = H5allocate_memory(nbytes + SUFFIX_LEN, 0))))
+            return 0;
+
+        /* Copy raw data */
+        memcpy((void *)dst, (const void *)(*buf), nbytes);
+
+        /* Append suffix to raw data for storage */
+        dst += nbytes;
+        memcpy((void *)dst, (const void *)GROUP_SUFFIX, SUFFIX_LEN);
+
+        /* Free the passed-in buffer using the library's allocator */
+        H5free_memory(*buf);
+
+        /* Set return values */
+        *buf_size = nbytes + SUFFIX_LEN;
+        *buf = outbuf;
+        outbuf = NULL;
+        new_name_size = *buf_size;
+    }
+
+    return new_name_size;
+} /* append_to_group_name() */
+
diff --git a/test/plugin.c b/test/plugin.c
deleted file mode 100644
index ea199f6..0000000
--- a/test/plugin.c
+++ /dev/null
@@ -1,1217 +0,0 @@
-/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
- * Copyright by The HDF Group.                                               *
- * All rights reserved.                                                      *
- *                                                                           *
- * This file is part of HDF5. The full HDF5 copyright notice, including      *
- * terms governing use, modification, and redistribution, is contained in    *
- * the COPYING file, which can be found at the root of the source code       *
- * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
- * If you do not have access to either file, you may request a copy from     *
- * help@hdfgroup.org.                                                        *
- * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
-/*
- * Purpose:    Tests the plugin module (H5PL)
- */
-
-#include "h5test.h"
-#include "H5srcdir.h"
-
-/*
- * This file needs to access private datatypes from the H5Z and H5PL package.
- */
-#define H5PL_FRIEND
-#include "H5PLpkg.h"
-#define H5Z_FRIEND
-#include "H5Zpkg.h"
-
-/* Filters for HDF5 internal test */
-#define H5Z_FILTER_DYNLIB1      257
-#define H5Z_FILTER_DYNLIB2      258
-#define H5Z_FILTER_DYNLIB3      259
-#define H5Z_FILTER_DYNLIB4      260
-
-const char *FILENAME[] = {
-    "plugin",
-    NULL
-};
-#define FILENAME_BUF_SIZE       1024
-
-/* Dataset names for testing filters */
-#define DSET_DEFLATE_NAME    "deflate"
-#define DSET_DYNLIB1_NAME    "dynlib1"
-#define DSET_DYNLIB2_NAME    "dynlib2"
-#define DSET_DYNLIB4_NAME    "dynlib4"
-
-/* Parameters for internal filter test */
-#define FILTER_CHUNK_DIM1       2
-#define FILTER_CHUNK_DIM2       25
-#define FILTER_HS_OFFSET1       7
-#define FILTER_HS_OFFSET2       30
-#define FILTER_HS_SIZE1         4
-#define FILTER_HS_SIZE2         50
-
-/* Shared global arrays */
-#define DSET_DIM1       100
-#define DSET_DIM2       200
-
-/* Limit random number within 20000 */
-#define RANDOM_LIMIT    20000
-
-#define GROUP_ITERATION 1000
-
-int    points_deflate[DSET_DIM1][DSET_DIM2],
-       points_dynlib1[DSET_DIM1][DSET_DIM2],
-       points_dynlib2[DSET_DIM1][DSET_DIM2],
-       points_dynlib4[DSET_DIM1][DSET_DIM2],
-       points_bzip2[DSET_DIM1][DSET_DIM2];
-
-
-/*-------------------------------------------------------------------------
- * Function:  test_filter_internal
- *
- * Purpose:   Tests writing entire data and partial data with filters
- *
- * Return:    Success:    0
- *            Failure:    -1
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_filter_internal(hid_t fid, const char *name, hid_t dcpl)
-{
-    herr_t       ret_value = -1;
-    hid_t        dataset = -1;          /* Dataset ID */
-    hid_t        dxpl = -1;             /* Dataset xfer property list ID */
-    hid_t        write_dxpl = -1;       /* Dataset xfer property list ID for writing */
-    hid_t        sid = -1;              /* Dataspace ID */
-    const hsize_t    size[2] = {DSET_DIM1, DSET_DIM2};                      /* Dataspace dimensions */
-    const hsize_t    hs_offset[2] = {FILTER_HS_OFFSET1, FILTER_HS_OFFSET2}; /* Hyperslab offset */
-    const hsize_t    hs_size[2] = {FILTER_HS_SIZE1, FILTER_HS_SIZE2};       /* Hyperslab size */
-    void        *tconv_buf = NULL;      /* Temporary conversion buffer */
-    int          points[DSET_DIM1][DSET_DIM2], check[DSET_DIM1][DSET_DIM2];
-    size_t       i, j;                  /* Local index variables */
-    int          n = 0;
-
-    /* Create the data space */
-    if((sid = H5Screate_simple(2, size, NULL)) < 0) TEST_ERROR
-
-    /*
-     * Create a small conversion buffer to test strip mining. We
-     * might as well test all we can!
-     */
-    if((dxpl = H5Pcreate(H5P_DATASET_XFER)) < 0) TEST_ERROR
-    tconv_buf = HDmalloc((size_t)1000);
-    if(H5Pset_buffer(dxpl, (size_t)1000, tconv_buf, NULL) < 0) TEST_ERROR
-    if((write_dxpl = H5Pcopy(dxpl)) < 0) TEST_ERROR;
-
-    TESTING("    filters (setup)");
-
-    /* Check if all the filters are available */
-    if(H5Pall_filters_avail(dcpl) != TRUE) {
-        H5_FAILED();
-        HDprintf("    Line %d: Incorrect filter availability\n", __LINE__);
-        TEST_ERROR
-    } /* end if */
-
-    /* Create the dataset */
-    if((dataset = H5Dcreate2(fid, name, H5T_NATIVE_INT, sid, H5P_DEFAULT, dcpl, H5P_DEFAULT)) < 0) TEST_ERROR
-
-    PASSED();
-
-    /*----------------------------------------------------------------------
-     * STEP 1: Read uninitialized data.  It should be zero.
-     *----------------------------------------------------------------------
-     */
-    TESTING("    filters (uninitialized read)");
-
-    if(H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl, check) < 0) TEST_ERROR;
-
-    for(i=0; i<(size_t)size[0]; i++)
-        for(j=0; j<(size_t)size[1]; j++)
-            if(0 != check[i][j]) {
-                H5_FAILED();
-                HDprintf("    Read a non-zero value.\n");
-                HDprintf("    At index %lu,%lu\n", (unsigned long)i, (unsigned long)j);
-                TEST_ERROR
-            } /* end if */
-    PASSED();
-
-    /*----------------------------------------------------------------------
-     * STEP 2: Test filters by setting up a chunked dataset and writing
-     * to it.
-     *----------------------------------------------------------------------
-     */
-    TESTING("    filters (write)");
-
-    n = 0;
-    for(i=0; i<size[0]; i++)
-        for(j=0; j<size[1]; j++)
-            points[i][j] = (int)(n++);
-
-    if(H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, write_dxpl, points) < 0) TEST_ERROR;
-
-    PASSED();
-
-    /*----------------------------------------------------------------------
-     * STEP 3: Try to read the data we just wrote.
-     *----------------------------------------------------------------------
-     */
-    TESTING("    filters (read)");
-
-    /* Read the dataset back */
-    if(H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl, check) < 0) TEST_ERROR;
-
-    /* Check that the values read are the same as the values written */
-    for(i=0; i<size[0]; i++)
-        for(j=0; j<size[1]; j++)
-            if(points[i][j] != check[i][j]) {
-                H5_FAILED();
-                HDfprintf(stderr,"    Read different values than written.\n");
-                HDfprintf(stderr,"    At index %lu,%lu\n", (unsigned long)i, (unsigned long)j);
-                HDfprintf(stderr,"    At original: %d\n", (int)points[i][j]);
-                HDfprintf(stderr,"    At returned: %d\n", (int)check[i][j]);
-                TEST_ERROR
-            } /* end if */
-
-    PASSED();
-
-    /*----------------------------------------------------------------------
-     * STEP 4: Write new data over the top of the old data.  The new data is
-     * random thus not very compressible, and will cause the chunks to move
-     * around as they grow.  We only change values for the left half of the
-     * dataset although we rewrite the whole thing.
-     *----------------------------------------------------------------------
-     */
-    TESTING("    filters (modify)");
-
-    for(i=0; i<size[0]; i++)
-        for(j=0; j<size[1]/2; j++)
-            points[i][j] = (int)HDrandom () % RANDOM_LIMIT;
-
-    if(H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, write_dxpl, points) < 0) TEST_ERROR;
-
-    /* Read the dataset back and check it */
-    if(H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl, check) < 0) TEST_ERROR;
-
-    /* Check that the values read are the same as the values written */
-    for(i=0; i<size[0]; i++)
-        for(j=0; j<size[1]; j++)
-            if(points[i][j] != check[i][j]) {
-                H5_FAILED();
-                HDprintf("    Read different values than written.\n");
-                HDprintf("    At index %lu,%lu\n", (unsigned long)i, (unsigned long)j);
-                TEST_ERROR
-            } /* end if */
-
-    PASSED();
-
-    /*----------------------------------------------------------------------
-     * STEP 5: Close the dataset and then open it and read it again.  This
-     * insures that the filters message is picked up properly from the
-     * object header.
-     *----------------------------------------------------------------------
-     */
-    TESTING("    filters (re-open)");
-
-    if(H5Dclose(dataset) < 0) TEST_ERROR;
-    if((dataset = H5Dopen2(fid, name, H5P_DEFAULT)) < 0) TEST_ERROR;
-
-    if(H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, dxpl, check) < 0) TEST_ERROR;
-
-    /* Check that the values read are the same as the values written */
-    for(i = 0; i < size[0]; i++)
-        for(j = 0; j < size[1]; j++)
-            if(points[i][j] != check[i][j]) {
-                H5_FAILED();
-                HDprintf("    Read different values than written.\n");
-                HDprintf("    At index %lu,%lu\n", (unsigned long)i, (unsigned long)j);
-                TEST_ERROR
-            } /* end if */
-
-    PASSED();
-
-    /*----------------------------------------------------------------------
-     * STEP 6: Test partial I/O by writing to and then reading from a
-     * hyperslab of the dataset.  The hyperslab does not line up on chunk
-     * boundaries (we know that case already works from above tests).
-     *----------------------------------------------------------------------
-     */
-    TESTING("    filters (partial I/O)");
-
-    for(i=0; i<(size_t)hs_size[0]; i++)
-        for(j=0; j<(size_t)hs_size[1]; j++)
-            points[(size_t)hs_offset[0]+i][(size_t)hs_offset[1]+j] = (int)HDrandom() % RANDOM_LIMIT;
-
-    if(H5Sselect_hyperslab(sid, H5S_SELECT_SET, hs_offset, NULL, hs_size, NULL) < 0) TEST_ERROR;
-    /* (Use the "read" DXPL because partial I/O on corrupted data test needs to ignore errors during writing) */
-    if(H5Dwrite(dataset, H5T_NATIVE_INT, sid, sid, dxpl, points) < 0) TEST_ERROR;
-
-    if(H5Dread(dataset, H5T_NATIVE_INT, sid, sid, dxpl, check) < 0) TEST_ERROR;
-
-    /* Check that the values read are the same as the values written */
-    for(i=0; i<(size_t)hs_size[0]; i++)
-        for(j=0; j<(size_t)hs_size[1]; j++)
-            if(points[(size_t)hs_offset[0]+i][(size_t)hs_offset[1]+j] != check[(size_t)hs_offset[0]+i][(size_t)hs_offset[1]+j]) {
-                H5_FAILED();
-                HDfprintf(stderr,"    Read different values than written.\n");
-                HDfprintf(stderr,"    At index %lu,%lu\n", (unsigned long)((size_t)hs_offset[0]+i), (unsigned long)((size_t)hs_offset[1]+j));
-                HDfprintf(stderr,"    At original: %d\n", (int)points[(size_t)hs_offset[0]+i][(size_t)hs_offset[1]+j]);
-                HDfprintf(stderr,"    At returned: %d\n", (int)check[(size_t)hs_offset[0]+i][(size_t)hs_offset[1]+j]);
-                TEST_ERROR
-            } /* end if */
-
-    PASSED();
-
-    /* Save the data written to the file for later comparison when the file
-     * is reopened for read test */
-    for(i=0; i<size[0]; i++)
-        for(j=0; j<size[1]; j++)
-            if(!HDstrcmp(name, DSET_DEFLATE_NAME))
-                points_deflate[i][j] = points[i][j];
-            else if(!HDstrcmp(name, DSET_DYNLIB1_NAME))
-                points_dynlib1[i][j] = points[i][j];
-            else if(!HDstrcmp(name, DSET_DYNLIB2_NAME))
-                points_dynlib2[i][j] = points[i][j];
-            else if(!HDstrcmp(name, DSET_DYNLIB4_NAME))
-                points_dynlib4[i][j] = points[i][j];
-
-    ret_value = 0;
-
-error:
-    /* Clean up objects used for this test */
-    H5E_BEGIN_TRY {
-        H5Dclose(dataset);
-        H5Sclose(sid);
-        H5Pclose(dxpl);
-    } H5E_END_TRY
-
-    if(tconv_buf)
-        HDfree(tconv_buf);
-    return ret_value;
-}
-
-/*-------------------------------------------------------------------------
- * Function:  test_filters_for_datasets
- *
- * Purpose:   Tests creating datasets and writing data with dynamically loaded filters
- *
- * Return:    Success:    0
- *            Failure:    -1
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_filters_for_datasets(hid_t file)
-{
-    herr_t           ret_value = -1;
-    hid_t            dc = -1;    /* Dataset creation property list ID */
-    const hsize_t    chunk_size[2] = {FILTER_CHUNK_DIM1, FILTER_CHUNK_DIM2};  /* Chunk dimensions */
-    unsigned int     compress_level = 9;
-    unsigned int     dynlib4_values[4];
-
-    /*----------------------------------------------------------
-     * STEP 1: Test deflation by itself.
-     *----------------------------------------------------------
-     */
-    HDputs("Testing deflate filter");
-#ifdef H5_HAVE_FILTER_DEFLATE
-    if((dc = H5Pcreate(H5P_DATASET_CREATE)) < 0) TEST_ERROR
-    if(H5Pset_chunk(dc, 2, chunk_size) < 0) TEST_ERROR
-    if(H5Pset_deflate(dc, 6) < 0) TEST_ERROR
-
-    if(test_filter_internal(file, DSET_DEFLATE_NAME, dc) < 0) TEST_ERROR
-    /* Clean up objects used for this test */
-    if(H5Pclose(dc) < 0) TEST_ERROR
-#else /* H5_HAVE_FILTER_DEFLATE */
-    SKIPPED();
-    HDputs("    Deflate filter not enabled");
-#endif /* H5_HAVE_FILTER_DEFLATE */
-
-    /*----------------------------------------------------------
-     * STEP 2: Test DYNLIB1 by itself.
-     *----------------------------------------------------------
-     */
-    HDputs("    DYNLIB1 filter");
-    if((dc = H5Pcreate(H5P_DATASET_CREATE)) < 0) TEST_ERROR
-    if(H5Pset_chunk(dc, 2, chunk_size) < 0) TEST_ERROR
-    if(H5Pset_filter(dc, H5Z_FILTER_DYNLIB1, H5Z_FLAG_MANDATORY, (size_t)1, &compress_level) < 0) TEST_ERROR
-
-    if(test_filter_internal(file, DSET_DYNLIB1_NAME, dc) < 0) TEST_ERROR
-
-    /* Clean up objects used for this test */
-    if(H5Pclose(dc) < 0) TEST_ERROR
-
-    /* Unregister the dynamic filter DYNLIB1 for testing purpose. The next time when this test is run for
-     * the new file format, the library's H5PL code has to search in the table of loaded plugin libraries
-     * for this filter. */
-    if(H5Zunregister(H5Z_FILTER_DYNLIB1) < 0) TEST_ERROR
-
-    /*----------------------------------------------------------
-     * STEP 3: Test DYNLIB2 by itself.
-     *----------------------------------------------------------
-     */
-    HDputs("    DYNLIB2 filter");
-    if((dc = H5Pcreate(H5P_DATASET_CREATE)) < 0) TEST_ERROR
-    if(H5Pset_chunk(dc, 2, chunk_size) < 0) TEST_ERROR
-    if(H5Pset_filter(dc, H5Z_FILTER_DYNLIB2, H5Z_FLAG_MANDATORY, 0, NULL) < 0) TEST_ERROR
-
-    if(test_filter_internal(file,DSET_DYNLIB2_NAME,dc) < 0) TEST_ERROR
-
-    /* Clean up objects used for this test */
-    if(H5Pclose(dc) < 0) TEST_ERROR
-
-    /* Unregister the dynamic filter DYNLIB2 for testing purpose. The next time when this test is run for
-     * the new file format, the library's H5PL code has to search in the table of loaded plugin libraries
-     * for this filter. */
-    if(H5Zunregister(H5Z_FILTER_DYNLIB2) < 0) TEST_ERROR
-
-    /*----------------------------------------------------------
-     * STEP 4: Test DYNLIB4 by itself.
-     *----------------------------------------------------------
-     */
-    HDputs("    DYNLIB4 filter");
-    if((dc = H5Pcreate(H5P_DATASET_CREATE)) < 0) TEST_ERROR
-    if(H5Pset_chunk(dc, 2, chunk_size) < 0) TEST_ERROR
-    dynlib4_values[0] = 9;
-    if(H5get_libversion(&dynlib4_values[1], &dynlib4_values[2], &dynlib4_values[3]) < 0) TEST_ERROR
-    if(H5Pset_filter(dc, H5Z_FILTER_DYNLIB4, H5Z_FLAG_MANDATORY, (size_t)4, dynlib4_values) < 0) TEST_ERROR
-
-    if(test_filter_internal(file, DSET_DYNLIB4_NAME, dc) < 0) TEST_ERROR
-
-    /* Clean up objects used for this test */
-    if(H5Pclose(dc) < 0) TEST_ERROR
-
-    /* Unregister the dynamic filter DYNLIB4 for testing purpose. The next time when this test is run for
-     * the new file format, the library's H5PL code has to search in the table of loaded plugin libraries
-     * for this filter. */
-    if(H5Zunregister(H5Z_FILTER_DYNLIB4) < 0) TEST_ERROR
-
-    ret_value = 0;
-
-error:
-    /* Clean up objects used for this test */
-    H5E_BEGIN_TRY {
-        H5Pclose(dc);
-    } H5E_END_TRY
-
-    return ret_value;
-}
-
-/*-------------------------------------------------------------------------
- * Function:  test_read_data
- *
- * Purpose:   Tests reading data and compares values
- *
- * Return:    Success:    0
- *            Failure:    -1
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_read_data(hid_t dataset, int *origin_data)
-{
-    herr_t        ret_value = -1;
-    int           check[DSET_DIM1][DSET_DIM2];
-    const hsize_t size[2] = {DSET_DIM1, DSET_DIM2};   /* Dataspace dimensions */
-    int          *data_p = origin_data;
-    size_t        i, j;        /* Local index variables */
-
-    /* Read the dataset back */
-    if(H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, check) < 0) TEST_ERROR;
-
-    /* Check that the values read are the same as the values written */
-    for(i=0; i<size[0]; i++)
-        for(j=0; j<size[1]; j++) {
-            if(*data_p != check[i][j]) {
-                H5_FAILED();
-                HDfprintf(stderr,"    Read different values than written.\n");
-                HDfprintf(stderr,"    At index %lu,%lu\n", (unsigned long)i, (unsigned long)j);
-                HDfprintf(stderr,"    At original: %d\n", *data_p);
-                HDfprintf(stderr,"    At returned: %d\n", (int)check[i][j]);
-                TEST_ERROR
-            } /* end if */
-           data_p++;
-        }
-
-    PASSED();
-    ret_value = 0;
-
-error:
-    return ret_value;
-}
-
-/*-------------------------------------------------------------------------
- * Function:  test_read_with_filters
- *
- * Purpose:   Tests reading dataset created with dynamically loaded filters
- *
- * Return:    Success:    0
- *            Failure:    -1
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_read_with_filters(hid_t file)
-{
-    herr_t  ret_value = -1;
-    hid_t   dset = -1;                 /* Dataset ID */
-
-    /*----------------------------------------------------------
-     * STEP 1: Test deflation by itself.
-     *----------------------------------------------------------
-     */
-    TESTING("deflate filter");
-
-#ifdef H5_HAVE_FILTER_DEFLATE
-    if(H5Zfilter_avail(H5Z_FILTER_DEFLATE) != TRUE) TEST_ERROR
-
-    if((dset = H5Dopen2(file,DSET_DEFLATE_NAME,H5P_DEFAULT)) < 0) TEST_ERROR
-
-    if(test_read_data(dset, (int *)points_deflate) < 0) TEST_ERROR
-
-    if(H5Dclose(dset) < 0) TEST_ERROR
-
-    /* Clean up objects used for this test */
-#else /* H5_HAVE_FILTER_DEFLATE */
-    SKIPPED();
-    HDputs("    Deflate filter not enabled");
-#endif /* H5_HAVE_FILTER_DEFLATE */
-
-    /*----------------------------------------------------------
-     * STEP 2: Test DYNLIB1 by itself.
-     *----------------------------------------------------------
-     */
-    TESTING("    DYNLIB1 filter");
-
-    if((dset = H5Dopen2(file, DSET_DYNLIB1_NAME, H5P_DEFAULT)) < 0) TEST_ERROR
-
-    if(test_read_data(dset, (int *)points_dynlib1) < 0) TEST_ERROR
-
-    if(H5Dclose(dset) < 0) TEST_ERROR
-
-    /*----------------------------------------------------------
-     * STEP 3: Test Bogus2 by itself.
-     *----------------------------------------------------------
-     */
-    TESTING("    DYNLIB2 filter");
-
-    if((dset = H5Dopen2(file, DSET_DYNLIB2_NAME, H5P_DEFAULT)) < 0) TEST_ERROR
-
-    if(test_read_data(dset, (int *)points_dynlib2) < 0) TEST_ERROR
-
-    if(H5Dclose(dset) < 0) TEST_ERROR
-
-    /*----------------------------------------------------------
-     * STEP 4: Test DYNLIB4 by itself.
-     *----------------------------------------------------------
-     */
-    TESTING("    DYNLIB4 filter");
-
-    if((dset = H5Dopen2(file,DSET_DYNLIB4_NAME,H5P_DEFAULT)) < 0) TEST_ERROR
-
-    if(test_read_data(dset, (int *)points_dynlib4) < 0) TEST_ERROR
-
-    if(H5Dclose(dset) < 0) TEST_ERROR
-
-    ret_value = 0;
-
-error:
-    /* Clean up objects used for this test */
-    H5E_BEGIN_TRY {
-        H5Dclose(dset);
-    } H5E_END_TRY
-
-    return ret_value;
-}
-
-/*-------------------------------------------------------------------------
- * Function:  test_noread_data
- *
- * Purpose:   Tests not reading data
- *
- * Return:    Success:    0
- *            Failure:    -1
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_noread_data(hid_t dataset)
-{
-    herr_t     ret_value = -1;
-    int        check[DSET_DIM1][DSET_DIM2];
-    herr_t     ret = -1;
-
-    /* Read the dataset back */
-    H5E_BEGIN_TRY {
-        ret = H5Dread(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, check);
-    } H5E_END_TRY
-    if(ret >= 0)
-        TEST_ERROR
-
-    PASSED();
-    ret_value = 0;
-
-error:
-    return ret_value;
-}
-
-/*-------------------------------------------------------------------------
- * Function:  test_noread_with_filters
- *
- * Purpose:   Tests reading dataset created with dynamically loaded filters disabled
- *
- * Return:    Success:    0
- *            Failure:    -1
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_noread_with_filters(hid_t file)
-{
-    herr_t      ret_value = -1;
-    hid_t       dset = -1;            /* Dataset ID */
-    unsigned    plugin_state;         /* status of plugins */
-
-    TESTING("DYNLIB1 filter with plugins disabled");
-
-    /* disable filter plugin */
-    if(H5PLget_loading_state(&plugin_state) < 0) TEST_ERROR
-
-    plugin_state = plugin_state & (unsigned)(~H5PL_FILTER_PLUGIN);
-
-    if(H5PLset_loading_state(plugin_state) < 0) TEST_ERROR
-
-    if((dset = H5Dopen2(file, DSET_DYNLIB1_NAME, H5P_DEFAULT)) < 0) TEST_ERROR
-
-    if(test_noread_data(dset) < 0) TEST_ERROR
-
-    if(H5Dclose(dset) < 0) TEST_ERROR
-
-    ret_value = 0;
-
-error:
-    /* re-enable filter plugin */
-    plugin_state = plugin_state | H5PL_FILTER_PLUGIN;
-    H5PLset_loading_state(plugin_state);
-
-    /* Clean up objects used for this test */
-    H5E_BEGIN_TRY {
-        H5Dclose(dset);
-    } H5E_END_TRY
-
-    return ret_value;
-}
-
-/*-------------------------------------------------------------------------
- * Function:  test_filters_for_groups
- *
- * Purpose:   Tests creating group with dynamically loaded filters
- *
- * Return:    Success:    0
- *            Failure:    -1
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_filters_for_groups(hid_t file)
-{
-    herr_t   ret_value = -1;
-    hid_t    gcpl = -1;
-    hid_t    gid = -1;
-    hid_t    group = -1;
-    int      i;
-    char     gname[256];
-
-    TESTING("DYNLIB3 filter for group");
-
-    if((gcpl = H5Pcreate(H5P_GROUP_CREATE)) < 0) TEST_ERROR
-
-    /* Use DYNLIB3 for creating groups */
-    if(H5Pset_filter (gcpl, H5Z_FILTER_DYNLIB3, H5Z_FLAG_MANDATORY, (size_t)0, NULL) < 0) TEST_ERROR
-
-    /* Create a group using this filter */
-    if((gid = H5Gcreate2(file, "group1", H5P_DEFAULT, gcpl, H5P_DEFAULT)) < 0) TEST_ERROR
-
-    /* Create multiple groups under "group1" */
-    for(i=0; i < GROUP_ITERATION; i++) {
-        HDsprintf(gname, "group_%d", i);
-        if((group = H5Gcreate2(gid, gname, H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT)) < 0) TEST_ERROR
-        if(H5Gclose(group) < 0) TEST_ERROR
-    }
-
-    /* Close the group */
-    if(H5Gclose(gid) < 0) TEST_ERROR
-
-    /* Clean up objects used for this test */
-    if(H5Pclose(gcpl) < 0) TEST_ERROR
-
-    PASSED();
-
-    ret_value = 0;
-
-error:
-    /* Clean up objects used for this test */
-    H5E_BEGIN_TRY {
-        H5Gclose(group);
-        H5Gclose(gid);
-        H5Pclose(gcpl);
-    } H5E_END_TRY
-
-    return ret_value;
-}
-
-/*-------------------------------------------------------------------------
- * Function:    test_groups_with_filters
- *
- * Purpose:     Tests opening group with dynamically loaded filters
- *
- * Return:      Success:    0
- *              Failure:    -1
- *
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_groups_with_filters(hid_t file)
-{
-    herr_t      ret_value = -1;
-    hid_t       gid = -1;
-    hid_t       group = -1;
-    int         i;
-    char        gname[256];
-
-    TESTING("opening groups with DYNLIB3 filter");
-
-    /* Open the top group */
-    if((gid = H5Gopen2(file, "group1", H5P_DEFAULT)) < 0) TEST_ERROR
-
-    /* Create multiple groups under "group1" */
-    for(i=0; i < GROUP_ITERATION; i++) {
-        HDsprintf(gname, "group_%d", i);
-        if((group = H5Gopen2(gid, gname, H5P_DEFAULT)) < 0) TEST_ERROR
-        if(H5Gclose(group) < 0) TEST_ERROR
-    }
-
-    /* Close the group */
-    if(H5Gclose(gid) < 0) TEST_ERROR
-
-    PASSED();
-
-    ret_value = 0;
-
-error:
-    /* Clean up objects used for this test */
-    H5E_BEGIN_TRY {
-        H5Gclose(group);
-        H5Gclose(gid);
-    } H5E_END_TRY
-
-    return ret_value;
-}
-
-
-/*-------------------------------------------------------------------------
- * Function:  test_path_api_calls
- *
- * Purpose:   Tests the H5PL API calls that manipulate the plugin search
- *            paths.
- *
- * Return:    SUCCEED/FAIL
- * 
- *-------------------------------------------------------------------------
- */
-static herr_t
-test_path_api_calls(void)
-{
-    unsigned int n_starting_paths;
-    unsigned int u;                 
-    unsigned int n_paths;
-    herr_t       ret;
-    ssize_t      path_len = -1;
-    char         path[256];
-    char         temp_name[256];
-
-    HDputs("Testing access to the filter path table");
-
-    if(H5Zfilter_avail(H5Z_FILTER_DYNLIB1) != TRUE)
-        TEST_ERROR
-
-    /* Set the number of paths to create for this test.
-     *
-     * This should be set high enough to ensure that at least one array
-     * expansion will take place. See H5PLpath.c for details.
-     */
-    n_starting_paths = 42;
-
-    /* Check that initialization is correct */
-    TESTING("    initialize");
-
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths != 2)
-        TEST_ERROR
-
-    PASSED();
-
-    /****************/
-    /* H5PLremove() */
-    /****************/
-
-    /* Remove all the current paths */
-    TESTING("    remove");
-
-    /* Get the current size */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-
-    /* Remove all existing paths */
-    for(u = n_paths; u > 0; u--)
-        if(H5PLremove(u-1) < 0) {
-            HDfprintf(stderr,"    at %u: %s\n", u, path);
-            TEST_ERROR
-        }
-
-    /* Verify the table is empty */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths > 0)
-        TEST_ERROR
-
-    PASSED();
-
-
-    TESTING("    remove (index 0 in empty table)");
-
-    /* Try to remove index zero in an empty list (SHOULD FAIL) */
-    H5E_BEGIN_TRY {
-        ret = H5PLremove(0);
-    } H5E_END_TRY
-    if(ret >= 0)
-        TEST_ERROR
-
-    PASSED();
-
-
-    /****************/
-    /* H5PLappend() */
-    /****************/
-
-    TESTING("    append");
-
-    /* Add a bunch of paths to the path table */
-    for(u = 0; u < n_starting_paths; u++) {
-        HDsprintf(path, "a_path_%u", u);
-        if(H5PLappend(path) < 0) {
-            HDfprintf(stderr,"    at %u: %s\n", u, path);
-            TEST_ERROR
-        }
-    }
-
-    PASSED();
-
-
-    /**********************/
-    /* H5PLremove() again */
-    /**********************/
-
-    TESTING("    remove (index too high)");
-
-    /* Try to remove a path where the index is beyond the table capacity (SHOULD FAIL) */
-    H5E_BEGIN_TRY {
-        ret = H5PLremove(n_starting_paths);
-    } H5E_END_TRY
-
-    if(ret >= 0)
-        TEST_ERROR
-
-    PASSED();
-
-
-    /*************/
-    /* H5PLget() */
-    /*************/
-
-    TESTING("    get (path name)");
-
-    /* Get the path length by passing in NULL */
-    if((path_len = H5PLget(0, NULL, 0)) <= 0) {
-        HDfprintf(stderr,"    get path 0 length failed\n");
-        TEST_ERROR
-    }
-    if(path_len != 8)
-        TEST_ERROR
-
-    /* Get the path */
-    if((path_len = H5PLget(0, path, 256)) <= 0) {
-        HDfprintf(stderr,"    get 0 len: %u : %s\n", path_len, path);
-        TEST_ERROR
-    }
-    if(HDstrcmp(path, "a_path_0") != 0) {
-        HDfprintf(stderr,"    get 0: %s\n", path);
-        TEST_ERROR
-    }
-
-    PASSED();
-
-
-    TESTING("    get (high and low indices)");
-
-    /* Get path at index 1 */
-    if((path_len = H5PLget(1, path, 256)) <= 0)
-        TEST_ERROR
-    if(HDstrcmp(path, "a_path_1") != 0) {
-        HDfprintf(stderr,"    get 1: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Get path at the last index */
-    if((path_len = H5PLget(n_starting_paths - 1, path, 256)) <= 0)
-        TEST_ERROR
-    HDsprintf(temp_name, "a_path_%u", n_starting_paths - 1);
-    if(HDstrcmp(path, temp_name) != 0) {
-        HDfprintf(stderr,"    get %u: %s\n", n_starting_paths - 1, path);
-        TEST_ERROR
-    }
-
-    PASSED();
-
-
-    TESTING("    get (index too high)");
-
-    /* Get path at the last + 1 index (SHOULD FAIL) */
-    H5E_BEGIN_TRY {
-        path_len = H5PLget(n_starting_paths, NULL, 0);
-    } H5E_END_TRY
-    if(path_len > 0)
-        TEST_ERROR
-
-    PASSED();
-
-
-    /*****************/
-    /* H5PLprepend() */
-    /*****************/
-
-    /* We'll remove a path at an arbitrary index and then
-     * prepend a new path.
-     */
-
-    TESTING("    remove (arbitrary index 1)");
-
-    /* Remove one path */
-    if(H5PLremove(8) < 0)
-        TEST_ERROR
-
-    /* Verify that the entries were moved */
-    if((path_len = H5PLget(8, path, 256)) <= 0)
-        TEST_ERROR
-    if(HDstrcmp(path, "a_path_9") != 0) {
-        HDfprintf(stderr,"    get 8: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Verify the table shrank */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths != n_starting_paths - 1)
-        TEST_ERROR
-
-    PASSED();
-
-
-    TESTING("    prepend");
-
-    /* Prepend one path */
-    HDsprintf(path, "a_path_%d", n_starting_paths + 1);
-    if(H5PLprepend(path) < 0) {
-        HDfprintf(stderr,"    prepend %u: %s\n", n_starting_paths + 1, path);
-        TEST_ERROR
-    }
-
-    /* Verify the table increased */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths != n_starting_paths)
-        TEST_ERROR
-
-    /* Verify that the entries were moved */
-    if(H5PLget(8, path, 256) <= 0)
-        TEST_ERROR
-    if(HDstrcmp(path, "a_path_7") != 0) {
-        HDfprintf(stderr,"    get 8: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Verify that the path was inserted at index zero */
-    if(H5PLget(0, path, 256) <= 0)
-        TEST_ERROR
-    HDsprintf(temp_name, "a_path_%d", n_starting_paths + 1);
-    if(HDstrcmp(path, temp_name) != 0) {
-        HDfprintf(stderr,"    get 0: %s\n", path);
-        TEST_ERROR
-    }
-
-    PASSED();
-
-
-    /*****************/
-    /* H5PLreplace() */
-    /*****************/
-
-    TESTING("    replace");
-
-    /* Replace one path at index 1 */
-    HDsprintf(path, "a_path_%u", n_starting_paths + 4);
-    if(H5PLreplace(path, 1) < 0) {
-        HDfprintf(stderr,"    replace 1: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Verify the table size remained the same */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths != n_starting_paths)
-        TEST_ERROR
-
-    /* Verify that the entries were not moved by
-     * inspecting the paths at indices +/- 1.
-     */
-
-    /* Check path at index 0 */
-    if(H5PLget(0, path, 256) <= 0)
-        TEST_ERROR
-    HDsprintf(temp_name, "a_path_%u", n_starting_paths + 1);
-    if(HDstrcmp(path, temp_name) != 0) {
-        HDfprintf(stderr,"    get 0: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Check path at index 2 */
-    if(H5PLget(2, path, 256) <= 0)
-        TEST_ERROR
-    if(HDstrcmp(path, "a_path_1") != 0) {
-        HDfprintf(stderr,"    get 2: %s\n", path);
-        TEST_ERROR
-    }
-
-    PASSED();
-
-
-    /****************/
-    /* H5PLinsert() */
-    /****************/
-
-    /* We'll remove a path at an arbitrary index and then
-     * insert a new path.
-     */
-
-    TESTING("    remove (arbitrary index 2)");
-
-    /* Remove one path */
-    if(H5PLremove(4) < 0)
-        TEST_ERROR
-
-    /* Verify that the entries were moved */
-    if(H5PLget(4, path, 256) <= 0)
-        TEST_ERROR
-    if(HDstrcmp(path, "a_path_4") != 0) {
-        HDfprintf(stderr,"    get 4: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Verify the table size */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths != n_starting_paths - 1)
-        TEST_ERROR
-    PASSED();
-
-
-    TESTING("    insert");
-
-    /* Insert one path at index 3*/
-    HDsprintf(path, "a_path_%d", n_starting_paths + 5);
-    if(H5PLinsert(path, 3) < 0) {
-        HDfprintf(stderr,"    insert 3: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Verify that the entries were moved */
-    if(H5PLget(4, path, 256) <= 0)
-        TEST_ERROR
-    if(HDstrcmp(path, "a_path_2") != 0) {
-        HDfprintf(stderr,"    get 4: %s\n", path);
-        TEST_ERROR
-    }
-
-    /* Verify the table size increased */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths != n_starting_paths)
-        TEST_ERROR
-
-    PASSED();
-
-
-    /****************/
-    /* H5PLremove() */
-    /****************/
-
-    /* Remove all the current paths */
-    TESTING("    remove (all)");
-
-    /* Get the current size */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-
-    /* Remove all existing paths */
-    for(u = n_paths; u > 0; u--)
-        if(H5PLremove(u-1) < 0) {
-            HDfprintf(stderr,"    at %u: %s\n", u, path);
-            TEST_ERROR
-        }
-
-    /* Verify the table is empty */
-    if(H5PLsize(&n_paths) < 0)
-        TEST_ERROR
-    if(n_paths > 0)
-        TEST_ERROR
-
-    PASSED();
-
-
-    return SUCCEED;
-
-error:
-    return FAIL;
-} /* end test_path_api_calls() */
-
-
-/*-------------------------------------------------------------------------
- * Function:    main
- *
- * Purpose:     Tests the plugin module (H5PL)
- *
- * Return:      EXIT_SUCCESS/EXIT_FAILURE
- *
- *-------------------------------------------------------------------------
- */
-int
-main(void)
-{
-    char        filename[FILENAME_BUF_SIZE];
-    hid_t       file = -1;
-    hid_t       fapl = -1;
-    hid_t       fapl2 = -1;
-    unsigned    new_format;
-    int         mdc_nelmts;
-    size_t      rdcc_nelmts;
-    size_t      rdcc_nbytes;
-    double      rdcc_w0;
-    int         nerrors = 0;
-
-    /* Testing setup */
-    h5_reset();
-
-    if ((fapl = h5_fileaccess()) < 0)
-        TEST_ERROR
-
-    /* Turn off the chunk cache, so all the chunks are immediately written to disk */
-    if (H5Pget_cache(fapl, &mdc_nelmts, &rdcc_nelmts, &rdcc_nbytes, &rdcc_w0) < 0)
-        TEST_ERROR
-    rdcc_nbytes = 0;
-    if (H5Pset_cache(fapl, mdc_nelmts, rdcc_nelmts, rdcc_nbytes, rdcc_w0) < 0)
-        TEST_ERROR
-
-    /* Copy the file access property list */
-    if ((fapl2 = H5Pcopy(fapl)) < 0)
-        TEST_ERROR
-
-    /* Set the "use the latest version of the format" bounds for creating objects in the file */
-    if (H5Pset_libver_bounds(fapl2, H5F_LIBVER_LATEST, H5F_LIBVER_LATEST) < 0)
-        TEST_ERROR
-
-    h5_fixname(FILENAME[0], fapl, filename, sizeof(filename));
-
-    /* Test with old & new format groups */
-    for (new_format = FALSE; new_format <= TRUE; new_format++) {
-        hid_t my_fapl;
-
-        /* Set the FAPL for the type of format */
-        if (new_format) {
-            HDputs("\nTesting with new file format:");
-            my_fapl = fapl2;
-        }
-        else {
-            HDputs("Testing with old file format:");
-            my_fapl = fapl;
-        }
-
-        /* Create the file for this test */
-        if ((file = H5Fcreate(filename, H5F_ACC_TRUNC, H5P_DEFAULT, my_fapl)) < 0)
-            TEST_ERROR
-
-        /* Test dynamically loaded filters for chunked dataset */
-        nerrors += (test_filters_for_datasets(file) < 0    ? 1 : 0);
-
-        /* Test dynamically loaded filters for groups */
-        nerrors += (test_filters_for_groups(file) < 0 ? 1 : 0);
-
-        if (H5Fclose(file) < 0)
-            TEST_ERROR
-    } /* end for */
-
-    /* Close FAPL */
-    if (H5Pclose(fapl2) < 0)
-        TEST_ERROR
-    if (H5Pclose(fapl) < 0)
-        TEST_ERROR
-
-    /* Restore the default error handler (set in h5_reset()) */
-    h5_restore_err();
-
-    HDputs("\nTesting reading data with with dynamic plugin filters:");
-
-    /* Close the library so that all loaded plugin libraries are unloaded */
-    h5_reset();
-    if ((fapl = h5_fileaccess()) < 0)
-        TEST_ERROR
-
-    /* Reopen the file for testing data reading */
-    if ((file = H5Fopen(filename, H5F_ACC_RDONLY, fapl)) < 0)
-        TEST_ERROR
-
-    /* Read the data with filters */
-    nerrors += (test_read_with_filters(file) < 0 ? 1 : 0);
-
-    /* Open the groups with filters */
-    nerrors += (test_groups_with_filters(file) < 0  ? 1 : 0);
-
-    /* Restore the default error handler (set in h5_reset()) */
-    h5_restore_err();
-
-    /* Close the library so that all loaded plugin libraries are unloaded */
-    h5_reset();
-    if ((fapl = h5_fileaccess()) < 0)
-        TEST_ERROR
-
-    /* Reopen the file for testing data reading */
-    if ((file = H5Fopen(filename, H5F_ACC_RDONLY, fapl)) < 0)
-        TEST_ERROR
-
-    /* Read the data with disabled filters */
-    nerrors += (test_noread_with_filters(file) < 0  ? 1 : 0);
-
-    if (H5Fclose(file) < 0)
-        TEST_ERROR
-
-    /* Test the APIs for access to the filter plugin path table */
-    nerrors += (test_path_api_calls() < 0  ? 1 : 0);
-
-    if (nerrors)
-        TEST_ERROR
-
-    HDprintf("All plugin tests passed.\n");
-    h5_cleanup(FILENAME, fapl);
-
-    HDexit(EXIT_SUCCESS);
-
-error:
-    nerrors = MAX(1, nerrors);
-    HDprintf("***** %d PLUGIN TEST%s FAILED! *****\n", nerrors, 1 == nerrors ? "" : "S");
-    HDexit(EXIT_FAILURE);
-} /* end main() */
-
diff --git a/test/test_plugin.sh.in b/test/test_filter_plugin.sh.in
index c90a978..0a45c0f 100644
--- a/test/test_plugin.sh.in
+++ b/test/test_filter_plugin.sh.in
@@ -13,7 +13,7 @@
 srcdir=@srcdir@
 TOP_BUILDDIR=@top_builddir@
 
-# Determine backward compatibility options enabled
+# Determine if backward compatibility options enabled
 DEPRECATED_SYMBOLS="@DEPRECATED_SYMBOLS@"
 
 EXIT_SUCCESS=0
@@ -23,21 +23,21 @@ nerrors=0
 verbose=yes
 exit_code=$EXIT_SUCCESS
 
-TEST_NAME=plugin
+TEST_NAME=filter_plugin
 TEST_BIN=`pwd`/$TEST_NAME
 FROM_DIR=`pwd`/.libs
 case $(uname) in
     CYGWIN* )
-        PLUGIN_LIB1="$FROM_DIR/cygdynlib1* $FROM_DIR/cygdynlib3*"
-        PLUGIN_LIB2="$FROM_DIR/cygdynlib2* $FROM_DIR/cygdynlib4*"
+        PLUGINS_FOR_DIR1="$FROM_DIR/cygfilter_plugin1* $FROM_DIR/cygfilter_plugin3*"
+        PLUGINS_FOR_DIR2="$FROM_DIR/cygfilter_plugin2* $FROM_DIR/cygfilter_plugin4*"
         ;;
     *)
-        PLUGIN_LIB1="$FROM_DIR/libdynlib1.* $FROM_DIR/libdynlib3.*"
-        PLUGIN_LIB2="$FROM_DIR/libdynlib2.* $FROM_DIR/libdynlib4.*"
+        PLUGINS_FOR_DIR1="$FROM_DIR/libfilter_plugin1* $FROM_DIR/libfilter_plugin3*"
+        PLUGINS_FOR_DIR2="$FROM_DIR/libfilter_plugin2* $FROM_DIR/libfilter_plugin4*"
         ;;
 esac
-PLUGIN_LIBDIR1=testdir1
-PLUGIN_LIBDIR2=testdir2
+PLUGIN_DIR1=filter_plugin_dir1
+PLUGIN_DIR2=filter_plugin_dir2
 CP="cp -p"    # Use -p to preserve mode,ownership,timestamps
 RM="rm -rf"
 
@@ -50,34 +50,34 @@ TESTING() {
 }
 
 # Main Body
-# Create test directories if not exists yet.
-test -d $PLUGIN_LIBDIR1 || mkdir -p $PLUGIN_LIBDIR1
+# Create test directories if necessary.
+test -d $PLUGIN_DIR1 || mkdir -p $PLUGIN_DIR1
 if [ $? != 0 ]; then
-    echo "Failed to create test directory($PLUGIN_LIBDIR1)"
+    echo "Failed to create filter plugin test directory ($PLUGIN_DIR1)"
     exit $EXIT_FAILURE
 fi
 
-test -d $PLUGIN_LIBDIR2 || mkdir -p $PLUGIN_LIBDIR2
+test -d $PLUGIN_DIR2 || mkdir -p $PLUGIN_DIR2
 if [ $? != 0 ]; then
-    echo "Failed to create test directory($PLUGIN_LIBDIR2)"
+    echo "Failed to create filter plugin test directory ($PLUGIN_DIR2)"
     exit $EXIT_FAILURE
 fi
 
-# copy plugin library for test
-$CP $PLUGIN_LIB1 $PLUGIN_LIBDIR1
+# Copy plugins for the tests.
+$CP $PLUGINS_FOR_DIR1 $PLUGIN_DIR1
 if [ $? != 0 ]; then
-    echo "Failed to copy plugin library ($PLUGIN_LIB1) for test."
+    echo "Failed to copy filter plugins ($PLUGINS_FOR_DIR1) to test directory."
     exit $EXIT_FAILURE
 fi
 
-$CP $PLUGIN_LIB2 $PLUGIN_LIBDIR2
+$CP $PLUGINS_FOR_DIR2 $PLUGIN_DIR2
 if [ $? != 0 ]; then
-    echo "Failed to copy plugin library ($PLUGIN_LIB2) for test."
+    echo "Failed to copy filter plugins ($PLUGINS_FOR_DIR2) to test directory."
     exit $EXIT_FAILURE
 fi
 
 # setup plugin path
-ENVCMD="env HDF5_PLUGIN_PATH=${PLUGIN_LIBDIR1}:${PLUGIN_LIBDIR2}"
+ENVCMD="env HDF5_PLUGIN_PATH=${PLUGIN_DIR1}:${PLUGIN_DIR2}"
 
 # Run the test
 $ENVCMD $TEST_BIN
@@ -87,9 +87,9 @@ fi
 
 ############################################
 # HDFFV-9655 test for relative path disabled
-# setup plugin path relative to test
+# setup filter plugin path relative to test
 # actual executable is in the .libs folder
-#ENVCMD="env HDF5_PLUGIN_PATH=@/../${PLUGIN_LIBDIR1}:@/../${PLUGIN_LIBDIR2}"
+#ENVCMD="env HDF5_PLUGIN_PATH=@/../${PLUGIN_DIR1}:@/../${PLUGIN_DIR2}"
 #
 # Run the test
 #$ENVCMD $TEST_BIN
@@ -103,11 +103,11 @@ if test $nerrors -ne 0 ; then
     echo "$nerrors errors encountered"
     exit_code=$EXIT_FAILURE
 else
-    echo "All Plugin API tests passed."
+    echo "All filter plugin tests passed."
     exit_code=$EXIT_SUCCESS
 fi
 
 # Clean up temporary files/directories and leave
-$RM $PLUGIN_LIBDIR1 $PLUGIN_LIBDIR2
+$RM $PLUGIN_DIR1 $PLUGIN_DIR2
 
 exit $exit_code