# - Find CxxTest
# Find the CxxTest suite and declare a helper macro for creating unit tests
# and integrating them with CTest.  To assist in finding CxxTest the
# CMAKE_PREFIX_PATH variable can be used.
# For more details on CxxTest see http://cxxtest.tigris.org
#
# INPUT Variables
#
#   CXXTEST_USE_PYTHON
#       If true, have the CXXTEST_ADD_TEST macro use
#       the python test generator instead of perl.
#
# OUTPUT Variables
#
#   CXXTEST_INCLUDE_DIR
#       Where to find the CxxTest include directory
#   CXXTEST_FOUND
#       True if the CxxTest framework was found
#   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:
#           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.
#               

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(CXXTEST_USE_PYTHON)
        SET(_cxxtest_executable ${CXXTEST_PERL_TESTGEN_EXECUTABLE})
    ENDIF(CXXTEST_USE_PYTHON)

    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)
        # The test binary is in 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(CMAKE_RUNTIME_OUTPUT_DIRECTORY)
        ADD_TEST(${_cxxtest_testname} ${CMAKE_CURRENT_BINARY_DIR}/${_cxxtest_testname})

    ENDIF(CMAKE_RUNTIME_OUTPUT_DIRECTORY)

ENDMACRO(CXXTEST_ADD_TEST)

#=========
# main
#=========

FIND_PATH(CXXTEST_INCLUDE_DIR cxxtest/SelfTest.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)
IF(CXXTEST_INCLUDE_DIR)
    SET(CXXTEST_INCLUDE_DIRS ${CXXTEST_INCLUDE_DIR})
    SET(CXXTEST_FOUND true)
ENDIF(CXXTEST_INCLUDE_DIR)