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# - Find CxxTest
# Find the CxxTest suite and declare a helper macro for creating unit tests
# and integrating them with CTest.
# For more details on CxxTest see http://cxxtest.tigris.org
#
# INPUT Variables
#
#   CXXTEST_USE_PYTHON
#       If true, the CXXTEST_ADD_TEST macro will use
#       the Python test generator instead of Perl.
#
# OUTPUT Variables
#
#   CXXTEST_FOUND
#       True if the CxxTest framework was found
#   CXXTEST_INCLUDE_DIR
#       Where to find the CxxTest include directory
#   CXXTEST_PERL_TESTGEN_EXECUTABLE
#       The perl-based test generator.
#   CXXTEST_PYTHON_TESTGEN_EXECUTABLE
#       The python-based test generator.
#
# MACROS for use by CMake users:
#
#    CXXTEST_ADD_TEST(<test_name> <gen_source_file> <input_files_to_testgen...>)
#       Creates a CxxTest runner and adds it to the CTest testing suite
#       Parameters:
#           test_name               The name of the test
#           gen_source_file         The generated source filename to be generated by CxxTest
#           input_files_to_testgen  The list of header files containing the
#                                   CxxTest::TestSuite's to be included in this runner
#           
#       #==============
#       Example Usage:
#
#           FIND_PACKAGE(CxxTest)
#           INCLUDE_DIRECTORIES(${CXXTEST_INCLUDE_DIR})
#
#           ENABLE_TESTING()
#           CXXTEST_ADD_TEST(unittest_foo foo_test.cc ${CMAKE_CURRENT_SOURCE_DIR}/foo_test.h)
#
#              This will:
#              1. Invoke the testgen executable to autogenerate foo_test.cc in the
#                 binary tree from "foo_test.h" in the current source directory.
#              2. Create an executable and test called unittest_foo.
#               
#      #=============
#      Example foo_test.h:
#
#          #include <cxxtest/TestSuite.h>
#          
#          class MyTestSuite : public CxxTest::TestSuite 
#          {
#          public:
#             void testAddition( void )
#             {
#                TS_ASSERT( 1 + 1 > 1 );
#                TS_ASSERT_EQUALS( 1 + 1, 2 );
#             }
#          };
#
#
# FindCxxTest.cmake
# Copyright (c) 2008
#     Philip Lowman <philip@yhbt.com>
#
# Version 1.0 (1/8/08)
#     Fixed CXXTEST_INCLUDE_DIRS so it will work properly
#     Eliminated superfluous CXXTEST_FOUND assignment
#     Cleaned up and added more documentation

#=============================================================
# CXXTEST_ADD_TEST (public macro)
#=============================================================
MACRO(CXXTEST_ADD_TEST _cxxtest_testname _cxxtest_outfname)
    SET(_cxxtest_real_outfname ${CMAKE_CURRENT_BINARY_DIR}/${_cxxtest_outfname})
    IF(CXXTEST_USE_PYTHON)
        SET(_cxxtest_executable ${CXXTEST_PYTHON_TESTGEN_EXECUTABLE})
    ELSE()
        SET(_cxxtest_executable ${CXXTEST_PERL_TESTGEN_EXECUTABLE})
    ENDIF()

    ADD_CUSTOM_COMMAND(
        OUTPUT  ${_cxxtest_real_outfname}
        DEPENDS ${ARGN}
        COMMAND ${_cxxtest_executable}
        --error-printer -o ${_cxxtest_real_outfname} ${ARGN}
    )

    SET_SOURCE_FILES_PROPERTIES(${_cxxtest_real_outfname} PROPERTIES GENERATED true)
    ADD_EXECUTABLE(${_cxxtest_testname} ${_cxxtest_real_outfname})

    IF(CMAKE_RUNTIME_OUTPUT_DIRECTORY)
        ADD_TEST(${_cxxtest_testname} ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${_cxxtest_testname})
    ELSEIF(EXECUTABLE_OUTPUT_PATH)
        ADD_TEST(${_cxxtest_testname} ${EXECUTABLE_OUTPUT_PATH}/${_cxxtest_testname})
    ELSE()
        ADD_TEST(${_cxxtest_testname} ${CMAKE_CURRENT_BINARY_DIR}/${_cxxtest_testname})
    ENDIF()

ENDMACRO(CXXTEST_ADD_TEST)

#=============================================================
# main()
#=============================================================

FIND_PATH(CXXTEST_INCLUDE_DIR cxxtest/TestSuite.h)
FIND_PROGRAM(CXXTEST_PERL_TESTGEN_EXECUTABLE cxxtestgen.pl)
FIND_PROGRAM(CXXTEST_PYTHON_TESTGEN_EXECUTABLE cxxtestgen.py)

INCLUDE(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(CxxTest DEFAULT_MSG CXXTEST_INCLUDE_DIR)
SET(CXXTEST_INCLUDE_DIRS ${CXXTEST_INCLUDE_DIR})