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Diffstat (limited to 'extras/Catch.cmake')
| -rw-r--r-- | extras/Catch.cmake | 318 |
1 files changed, 318 insertions, 0 deletions
diff --git a/extras/Catch.cmake b/extras/Catch.cmake new file mode 100644 index 0000000..3d93fe2 --- /dev/null +++ b/extras/Catch.cmake @@ -0,0 +1,318 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +#[=======================================================================[.rst: +Catch +----- + +This module defines a function to help use the Catch test framework. + +The :command:`catch_discover_tests` discovers tests by asking the compiled test +executable to enumerate its tests. This does not require CMake to be re-run +when tests change. However, it may not work in a cross-compiling environment, +and setting test properties is less convenient. + +This command is intended to replace use of :command:`add_test` to register +tests, and will create a separate CTest test for each Catch test case. Note +that this is in some cases less efficient, as common set-up and tear-down logic +cannot be shared by multiple test cases executing in the same instance. +However, it provides more fine-grained pass/fail information to CTest, which is +usually considered as more beneficial. By default, the CTest test name is the +same as the Catch name; see also ``TEST_PREFIX`` and ``TEST_SUFFIX``. + +.. command:: catch_discover_tests + + Automatically add tests with CTest by querying the compiled test executable + for available tests:: + + catch_discover_tests(target + [TEST_SPEC arg1...] + [EXTRA_ARGS arg1...] + [WORKING_DIRECTORY dir] + [TEST_PREFIX prefix] + [TEST_SUFFIX suffix] + [PROPERTIES name1 value1...] + [TEST_LIST var] + [REPORTER reporter] + [OUTPUT_DIR dir] + [OUTPUT_PREFIX prefix] + [OUTPUT_SUFFIX suffix] + [DISCOVERY_MODE <POST_BUILD|PRE_TEST>] + [SKIP_IS_FAILURE] + [ADD_TAGS_AS_LABELS] + ) + + ``catch_discover_tests`` sets up a post-build command on the test executable + that generates the list of tests by parsing the output from running the test + with the ``--list-test-names-only`` argument. This ensures that the full + list of tests is obtained. Since test discovery occurs at build time, it is + not necessary to re-run CMake when the list of tests changes. + However, it requires that :prop_tgt:`CROSSCOMPILING_EMULATOR` is properly set + in order to function in a cross-compiling environment. + + Additionally, setting properties on tests is somewhat less convenient, since + the tests are not available at CMake time. Additional test properties may be + assigned to the set of tests as a whole using the ``PROPERTIES`` option. If + more fine-grained test control is needed, custom content may be provided + through an external CTest script using the :prop_dir:`TEST_INCLUDE_FILES` + directory property. The set of discovered tests is made accessible to such a + script via the ``<target>_TESTS`` variable. + + The options are: + + ``target`` + Specifies the Catch executable, which must be a known CMake executable + target. CMake will substitute the location of the built executable when + running the test. + + ``TEST_SPEC arg1...`` + Specifies test cases, wildcarded test cases, tags and tag expressions to + pass to the Catch executable with the ``--list-test-names-only`` argument. + + ``EXTRA_ARGS arg1...`` + Any extra arguments to pass on the command line to each test case. + + ``WORKING_DIRECTORY dir`` + Specifies the directory in which to run the discovered test cases. If this + option is not provided, the current binary directory is used. + + ``TEST_PREFIX prefix`` + Specifies a ``prefix`` to be prepended to the name of each discovered test + case. This can be useful when the same test executable is being used in + multiple calls to ``catch_discover_tests()`` but with different + ``TEST_SPEC`` or ``EXTRA_ARGS``. + + ``TEST_SUFFIX suffix`` + Similar to ``TEST_PREFIX`` except the ``suffix`` is appended to the name of + every discovered test case. Both ``TEST_PREFIX`` and ``TEST_SUFFIX`` may + be specified. + + ``PROPERTIES name1 value1...`` + Specifies additional properties to be set on all tests discovered by this + invocation of ``catch_discover_tests``. + + ``TEST_LIST var`` + Make the list of tests available in the variable ``var``, rather than the + default ``<target>_TESTS``. This can be useful when the same test + executable is being used in multiple calls to ``catch_discover_tests()``. + Note that this variable is only available in CTest. + + ``REPORTER reporter`` + Use the specified reporter when running the test case. The reporter will + be passed to the Catch executable as ``--reporter reporter``. + + ``OUTPUT_DIR dir`` + If specified, the parameter is passed along as + ``--out dir/<test_name>`` to Catch executable. The actual file name is the + same as the test name. This should be used instead of + ``EXTRA_ARGS --out foo`` to avoid race conditions writing the result output + when using parallel test execution. + + ``OUTPUT_PREFIX prefix`` + May be used in conjunction with ``OUTPUT_DIR``. + If specified, ``prefix`` is added to each output file name, like so + ``--out dir/prefix<test_name>``. + + ``OUTPUT_SUFFIX suffix`` + May be used in conjunction with ``OUTPUT_DIR``. + If specified, ``suffix`` is added to each output file name, like so + ``--out dir/<test_name>suffix``. This can be used to add a file extension to + the output e.g. ".xml". + + ``DL_PATHS path...`` + Specifies paths that need to be set for the dynamic linker to find shared + libraries/DLLs when running the test executable (PATH/LD_LIBRARY_PATH respectively). + These paths will both be set when retrieving the list of test cases from the + test executable and when the tests are executed themselves. This requires + cmake/ctest >= 3.22. + + ``DL_FRAMEWORK_PATHS path...`` + Specifies paths that need to be set for the dynamic linker to find libraries + packaged as frameworks on Apple platforms when running the test executable + (DYLD_FRAMEWORK_PATH). These paths will both be set when retrieving the list + of test cases from the test executable and when the tests are executed themselves. + This requires cmake/ctest >= 3.22. + + ``DISCOVERY_MODE mode`` + Provides control over when ``catch_discover_tests`` performs test discovery. + By default, ``POST_BUILD`` sets up a post-build command to perform test discovery + at build time. In certain scenarios, like cross-compiling, this ``POST_BUILD`` + behavior is not desirable. By contrast, ``PRE_TEST`` delays test discovery until + just prior to test execution. This way test discovery occurs in the target environment + where the test has a better chance at finding appropriate runtime dependencies. + + ``DISCOVERY_MODE`` defaults to the value of the + ``CMAKE_CATCH_DISCOVER_TESTS_DISCOVERY_MODE`` variable if it is not passed when + calling ``catch_discover_tests``. This provides a mechanism for globally selecting + a preferred test discovery behavior without having to modify each call site. + + ``SKIP_IS_FAILURE`` + Disables skipped test detection. + + ``ADD_TAGS_AS_LABELS`` + Adds all test tags as CTest labels. + +#]=======================================================================] + +#------------------------------------------------------------------------------ +function(catch_discover_tests TARGET) + + cmake_parse_arguments( + "" + "SKIP_IS_FAILURE;ADD_TAGS_AS_LABELS" + "TEST_PREFIX;TEST_SUFFIX;WORKING_DIRECTORY;TEST_LIST;REPORTER;OUTPUT_DIR;OUTPUT_PREFIX;OUTPUT_SUFFIX;DISCOVERY_MODE" + "TEST_SPEC;EXTRA_ARGS;PROPERTIES;DL_PATHS;DL_FRAMEWORK_PATHS" + ${ARGN} + ) + + if (${CMAKE_VERSION} VERSION_LESS "3.19") + message(FATAL_ERROR "This script requires JSON support from CMake version 3.19 or greater.") + endif() + + if(NOT _WORKING_DIRECTORY) + set(_WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}") + endif() + if(NOT _TEST_LIST) + set(_TEST_LIST ${TARGET}_TESTS) + endif() + if(_DL_PATHS AND ${CMAKE_VERSION} VERSION_LESS "3.22.0") + message(FATAL_ERROR "The DL_PATHS option requires at least cmake 3.22") + endif() + if(_DL_FRAMEWORK_PATHS AND ${CMAKE_VERSION} VERSION_LESS "3.22.0") + message(FATAL_ERROR "The DL_FRAMEWORK_PATHS option requires at least cmake 3.22") + endif() + if(NOT _DISCOVERY_MODE) + if(NOT CMAKE_CATCH_DISCOVER_TESTS_DISCOVERY_MODE) + set(CMAKE_CATCH_DISCOVER_TESTS_DISCOVERY_MODE "POST_BUILD") + endif() + set(_DISCOVERY_MODE ${CMAKE_CATCH_DISCOVER_TESTS_DISCOVERY_MODE}) + endif() + if (NOT _DISCOVERY_MODE MATCHES "^(POST_BUILD|PRE_TEST)$") + message(FATAL_ERROR "Unknown DISCOVERY_MODE: ${_DISCOVERY_MODE}") + endif() + + ## Generate a unique name based on the extra arguments + string(SHA1 args_hash "${_TEST_SPEC} ${_EXTRA_ARGS} ${_REPORTER} ${_OUTPUT_DIR} ${_OUTPUT_PREFIX} ${_OUTPUT_SUFFIX}") + string(SUBSTRING ${args_hash} 0 7 args_hash) + + # Define rule to generate test list for aforementioned test executable + set(ctest_file_base "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}-${args_hash}") + set(ctest_include_file "${ctest_file_base}_include.cmake") + set(ctest_tests_file "${ctest_file_base}_tests.cmake") + + get_property(crosscompiling_emulator + TARGET ${TARGET} + PROPERTY CROSSCOMPILING_EMULATOR + ) + if (NOT _SKIP_IS_FAILURE) + set(_PROPERTIES ${_PROPERTIES} SKIP_RETURN_CODE 4) + endif() + + if(_DISCOVERY_MODE STREQUAL "POST_BUILD") + add_custom_command( + TARGET ${TARGET} POST_BUILD + BYPRODUCTS "${ctest_tests_file}" + COMMAND "${CMAKE_COMMAND}" + -D "TEST_TARGET=${TARGET}" + -D "TEST_EXECUTABLE=$<TARGET_FILE:${TARGET}>" + -D "TEST_EXECUTOR=${crosscompiling_emulator}" + -D "TEST_WORKING_DIR=${_WORKING_DIRECTORY}" + -D "TEST_SPEC=${_TEST_SPEC}" + -D "TEST_EXTRA_ARGS=${_EXTRA_ARGS}" + -D "TEST_PROPERTIES=${_PROPERTIES}" + -D "TEST_PREFIX=${_TEST_PREFIX}" + -D "TEST_SUFFIX=${_TEST_SUFFIX}" + -D "TEST_LIST=${_TEST_LIST}" + -D "TEST_REPORTER=${_REPORTER}" + -D "TEST_OUTPUT_DIR=${_OUTPUT_DIR}" + -D "TEST_OUTPUT_PREFIX=${_OUTPUT_PREFIX}" + -D "TEST_OUTPUT_SUFFIX=${_OUTPUT_SUFFIX}" + -D "TEST_DL_PATHS=${_DL_PATHS}" + -D "TEST_DL_FRAMEWORK_PATHS=${_DL_FRAMEWORK_PATHS}" + -D "CTEST_FILE=${ctest_tests_file}" + -D "ADD_TAGS_AS_LABELS=${_ADD_TAGS_AS_LABELS}" + -P "${_CATCH_DISCOVER_TESTS_SCRIPT}" + VERBATIM + ) + + file(WRITE "${ctest_include_file}" + "if(EXISTS \"${ctest_tests_file}\")\n" + " include(\"${ctest_tests_file}\")\n" + "else()\n" + " add_test(${TARGET}_NOT_BUILT-${args_hash} ${TARGET}_NOT_BUILT-${args_hash})\n" + "endif()\n" + ) + + elseif(_DISCOVERY_MODE STREQUAL "PRE_TEST") + + get_property(GENERATOR_IS_MULTI_CONFIG GLOBAL + PROPERTY GENERATOR_IS_MULTI_CONFIG + ) + + if(GENERATOR_IS_MULTI_CONFIG) + set(ctest_tests_file "${ctest_file_base}_tests-$<CONFIG>.cmake") + endif() + + string(CONCAT ctest_include_content + "if(EXISTS \"$<TARGET_FILE:${TARGET}>\")" "\n" + " if(NOT EXISTS \"${ctest_tests_file}\" OR" "\n" + " NOT \"${ctest_tests_file}\" IS_NEWER_THAN \"$<TARGET_FILE:${TARGET}>\" OR\n" + " NOT \"${ctest_tests_file}\" IS_NEWER_THAN \"\${CMAKE_CURRENT_LIST_FILE}\")\n" + " include(\"${_CATCH_DISCOVER_TESTS_SCRIPT}\")" "\n" + " catch_discover_tests_impl(" "\n" + " TEST_EXECUTABLE" " [==[" "$<TARGET_FILE:${TARGET}>" "]==]" "\n" + " TEST_EXECUTOR" " [==[" "${crosscompiling_emulator}" "]==]" "\n" + " TEST_WORKING_DIR" " [==[" "${_WORKING_DIRECTORY}" "]==]" "\n" + " TEST_SPEC" " [==[" "${_TEST_SPEC}" "]==]" "\n" + " TEST_EXTRA_ARGS" " [==[" "${_EXTRA_ARGS}" "]==]" "\n" + " TEST_PROPERTIES" " [==[" "${_PROPERTIES}" "]==]" "\n" + " TEST_PREFIX" " [==[" "${_TEST_PREFIX}" "]==]" "\n" + " TEST_SUFFIX" " [==[" "${_TEST_SUFFIX}" "]==]" "\n" + " TEST_LIST" " [==[" "${_TEST_LIST}" "]==]" "\n" + " TEST_REPORTER" " [==[" "${_REPORTER}" "]==]" "\n" + " TEST_OUTPUT_DIR" " [==[" "${_OUTPUT_DIR}" "]==]" "\n" + " TEST_OUTPUT_PREFIX" " [==[" "${_OUTPUT_PREFIX}" "]==]" "\n" + " TEST_OUTPUT_SUFFIX" " [==[" "${_OUTPUT_SUFFIX}" "]==]" "\n" + " CTEST_FILE" " [==[" "${ctest_tests_file}" "]==]" "\n" + " TEST_DL_PATHS" " [==[" "${_DL_PATHS}" "]==]" "\n" + " TEST_DL_FRAMEWORK_PATHS" " [==[" "${_DL_FRAMEWORK_PATHS}" "]==]" "\n" + " ADD_TAGS_AS_LABELS" " [==[" "${_ADD_TAGS_AS_LABELS}" "]==]" "\n" + " )" "\n" + " endif()" "\n" + " include(\"${ctest_tests_file}\")" "\n" + "else()" "\n" + " add_test(${TARGET}_NOT_BUILT ${TARGET}_NOT_BUILT)" "\n" + "endif()" "\n" + ) + + if(GENERATOR_IS_MULTI_CONFIG) + foreach(_config ${CMAKE_CONFIGURATION_TYPES}) + file(GENERATE OUTPUT "${ctest_file_base}_include-${_config}.cmake" CONTENT "${ctest_include_content}" CONDITION $<CONFIG:${_config}>) + endforeach() + string(CONCAT ctest_include_multi_content + "if(NOT CTEST_CONFIGURATION_TYPE)" "\n" + " message(\"No configuration for testing specified, use '-C <cfg>'.\")" "\n" + "else()" "\n" + " include(\"${ctest_file_base}_include-\${CTEST_CONFIGURATION_TYPE}.cmake\")" "\n" + "endif()" "\n" + ) + file(GENERATE OUTPUT "${ctest_include_file}" CONTENT "${ctest_include_multi_content}") + else() + file(GENERATE OUTPUT "${ctest_file_base}_include.cmake" CONTENT "${ctest_include_content}") + file(WRITE "${ctest_include_file}" "include(\"${ctest_file_base}_include.cmake\")") + endif() + endif() + + # Add discovered tests to directory TEST_INCLUDE_FILES + set_property(DIRECTORY + APPEND PROPERTY TEST_INCLUDE_FILES "${ctest_include_file}" + ) + +endfunction() + +############################################################################### + +set(_CATCH_DISCOVER_TESTS_SCRIPT + ${CMAKE_CURRENT_LIST_DIR}/CatchAddTests.cmake + CACHE INTERNAL "Catch2 full path to CatchAddTests.cmake helper file" +) |