1 files changed, 158 insertions, 0 deletions
diff --git a/Tests/CMakeTests/IfTest.cmake.in b/Tests/CMakeTests/IfTest.cmake.in
new file mode 100644
index 0000000..e5211b4
--- /dev/null
+++ b/Tests/CMakeTests/IfTest.cmake.in
@@ -0,0 +1,158 @@
+# Prepare variable definitions.
+set(VAR_UNDEFINED)
+set(VAR_PATH /some/path/to/a/file.txt)
+set(FALSE_NAMES OFF NO FALSE N FOO-NOTFOUND IGNORE Off No False Ignore off n no false ignore)
+set(TRUE_NAMES ON YES TRUE Y On Yes True on yes true y)
+foreach(_arg "" 0 1 2 ${TRUE_NAMES} ${FALSE_NAMES})
+  set(VAR_${_arg} "${_arg}")
+endforeach()
+
+macro(test_vars _old)
+  # Variables set to false or not set.
+  foreach(_var "" 0 ${FALSE_NAMES} UNDEFINED)
+    if(VAR_${_var})
+      message(FATAL_ERROR "${_old}if(VAR_${_var}) is true!")
+    else()
+      message(STATUS "${_old}if(VAR_${_var}) is false")
+    endif()
+
+    if(NOT VAR_${_var})
+      message(STATUS "${_old}if(NOT VAR_${_var}) is true")
+    else()
+      message(FATAL_ERROR "${_old}if(NOT VAR_${_var}) is false!")
+    endif()
+  endforeach()
+
+  # Variables set to true.
+  foreach(_var 1 2 ${TRUE_NAMES} PATH)
+    if(VAR_${_var})
+      message(STATUS "${_old}if(VAR_${_var}) is true")
+    else()
+      message(FATAL_ERROR "${_old}if(VAR_${_var}) is false!")
+    endif()
+
+    if(NOT VAR_${_var})
+      message(FATAL_ERROR "${_old}if(NOT VAR_${_var}) is true!")
+    else()
+      message(STATUS "${_old}if(NOT VAR_${_var}) is false")
+    endif()
+  endforeach()
+endmacro()
+
+#-----------------------------------------------------------------------------
+# Test the OLD behavior of CMP0012.
+cmake_policy(SET CMP0012 OLD)
+
+# False constants not recognized (still false).
+foreach(_false "" ${FALSE_NAMES})
+  if("${_false}")
+    message(FATAL_ERROR "OLD if(${_false}) is true!")
+  else()
+    message(STATUS "OLD if(${_false}) is false")
+  endif()
+
+  if(NOT "${_false}")
+    message(STATUS "OLD if(NOT ${_false}) is true")
+  else()
+    message(FATAL_ERROR "OLD if(NOT ${_false}) is false!")
+  endif()
+endforeach()
+
+# True constants not recognized.
+foreach(_false ${TRUE_NAMES})
+  if(${_false})
+    message(FATAL_ERROR "OLD if(${_false}) is true!")
+  else()
+    message(STATUS "OLD if(${_false}) is false")
+  endif()
+
+  if(NOT ${_false})
+    message(STATUS "OLD if(NOT ${_false}) is true")
+  else()
+    message(FATAL_ERROR "OLD if(NOT ${_false}) is false!")
+  endif()
+endforeach()
+
+# Numbers not recognized properly.
+foreach(_num 2 -2 2.0 -2.0 2x -2x)
+  if(${_num})
+    message(FATAL_ERROR "OLD if(${_num}) is true!")
+  else()
+    message(STATUS "OLD if(${_num}) is false")
+  endif()
+
+  if(NOT ${_num})
+    message(FATAL_ERROR "OLD if(NOT ${_num}) is true!")
+  else()
+    message(STATUS "OLD if(NOT ${_num}) is false")
+  endif()
+endforeach()
+
+test_vars("OLD ")
+
+#-----------------------------------------------------------------------------
+
+# Test the NEW behavior of CMP0012.
+cmake_policy(SET CMP0012 NEW)
+
+# Test false constants.
+foreach(_false "" 0 ${FALSE_NAMES})
+  if("${_false}")
+    message(FATAL_ERROR "if(${_false}) is true!")
+  else()
+    message(STATUS "if(${_false}) is false")
+  endif()
+
+  if(NOT "${_false}")
+    message(STATUS "if(NOT ${_false}) is true")
+  else()
+    message(FATAL_ERROR "if(NOT ${_false}) is false!")
+  endif()
+endforeach()
+
+# Test true constants.
+foreach(_true 1 ${TRUE_NAMES})
+  if(${_true})
+    message(STATUS "if(${_true}) is true")
+  else()
+    message(FATAL_ERROR "if(${_true}) is false!")
+  endif()
+
+  if(NOT ${_true})
+    message(FATAL_ERROR "if(NOT ${_true}) is true!")
+  else()
+    message(STATUS "if(NOT ${_true}) is false")
+  endif()
+endforeach()
+
+# Numbers recognized properly.
+foreach(_num 2 -2 2.0 -2.0)
+  if(${_num})
+    message(STATUS "if(${_num}) is true")
+  else()
+    message(FATAL_ERROR "if(${_num}) is false!")
+  endif()
+
+  if(NOT ${_num})
+    message(FATAL_ERROR "if(NOT ${_num}) is true!")
+  else()
+    message(STATUS "if(NOT ${_num}) is false")
+  endif()
+endforeach()
+
+# Bad numbers not recognized.
+foreach(_bad 2x -2x)
+  if(${_bad})
+    message(FATAL_ERROR "if(${_bad}) is true!")
+  else()
+    message(STATUS "if(${_bad}) is false")
+  endif()
+
+  if(NOT ${_bad})
+    message(STATUS "if(NOT ${_bad}) is true")
+  else()
+    message(FATAL_ERROR "if(NOT ${_bad}) is false!")
+  endif()
+endforeach()
+
+test_vars("")