221 lines
9 KiB
CMake
221 lines
9 KiB
CMake
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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# file Copyright.txt or https://cmake.org/licensing for details.
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#[=======================================================================[.rst:
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Catch
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-----
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This module defines a function to help use the Catch test framework.
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The :command:`catch_discover_tests` discovers tests by asking the compiled test
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executable to enumerate its tests. This does not require CMake to be re-run
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when tests change. However, it may not work in a cross-compiling environment,
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and setting test properties is less convenient.
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This command is intended to replace use of :command:`add_test` to register
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tests, and will create a separate CTest test for each Catch test case. Note
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that this is in some cases less efficient, as common set-up and tear-down logic
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cannot be shared by multiple test cases executing in the same instance.
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However, it provides more fine-grained pass/fail information to CTest, which is
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usually considered as more beneficial. By default, the CTest test name is the
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same as the Catch name; see also ``TEST_PREFIX`` and ``TEST_SUFFIX``.
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.. command:: catch_discover_tests
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Automatically add tests with CTest by querying the compiled test executable
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for available tests::
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catch_discover_tests(target
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[TEST_SPEC arg1...]
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[EXTRA_ARGS arg1...]
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[WORKING_DIRECTORY dir]
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[TEST_PREFIX prefix]
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[TEST_SUFFIX suffix]
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[PROPERTIES name1 value1...]
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[TEST_LIST var]
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[REPORTER reporter]
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[OUTPUT_DIR dir]
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[OUTPUT_PREFIX prefix}
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[OUTPUT_SUFFIX suffix]
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)
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``catch_discover_tests`` sets up a post-build command on the test executable
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that generates the list of tests by parsing the output from running the test
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with the ``--list-test-names-only`` argument. This ensures that the full
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list of tests is obtained. Since test discovery occurs at build time, it is
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not necessary to re-run CMake when the list of tests changes.
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However, it requires that :prop_tgt:`CROSSCOMPILING_EMULATOR` is properly set
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in order to function in a cross-compiling environment.
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Additionally, setting properties on tests is somewhat less convenient, since
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the tests are not available at CMake time. Additional test properties may be
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assigned to the set of tests as a whole using the ``PROPERTIES`` option. If
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more fine-grained test control is needed, custom content may be provided
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through an external CTest script using the :prop_dir:`TEST_INCLUDE_FILES`
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directory property. The set of discovered tests is made accessible to such a
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script via the ``<target>_TESTS`` variable.
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The options are:
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``target``
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Specifies the Catch executable, which must be a known CMake executable
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target. CMake will substitute the location of the built executable when
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running the test.
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``TEST_SPEC arg1...``
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Specifies test cases, wildcarded test cases, tags and tag expressions to
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pass to the Catch executable with the ``--list-test-names-only`` argument.
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``EXTRA_ARGS arg1...``
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Any extra arguments to pass on the command line to each test case.
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``WORKING_DIRECTORY dir``
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Specifies the directory in which to run the discovered test cases. If this
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option is not provided, the current binary directory is used.
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``TEST_PREFIX prefix``
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Specifies a ``prefix`` to be prepended to the name of each discovered test
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case. This can be useful when the same test executable is being used in
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multiple calls to ``catch_discover_tests()`` but with different
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``TEST_SPEC`` or ``EXTRA_ARGS``.
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``TEST_SUFFIX suffix``
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Similar to ``TEST_PREFIX`` except the ``suffix`` is appended to the name of
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every discovered test case. Both ``TEST_PREFIX`` and ``TEST_SUFFIX`` may
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be specified.
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``PROPERTIES name1 value1...``
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Specifies additional properties to be set on all tests discovered by this
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invocation of ``catch_discover_tests``.
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``TEST_LIST var``
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Make the list of tests available in the variable ``var``, rather than the
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default ``<target>_TESTS``. This can be useful when the same test
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executable is being used in multiple calls to ``catch_discover_tests()``.
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Note that this variable is only available in CTest.
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``REPORTER reporter``
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Use the specified reporter when running the test case. The reporter will
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be passed to the Catch executable as ``--reporter reporter``.
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``OUTPUT_DIR dir``
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If specified, the parameter is passed along as
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``--out dir/<test_name>`` to Catch executable. The actual file name is the
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same as the test name. This should be used instead of
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``EXTRA_ARGS --out foo`` to avoid race conditions writing the result output
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when using parallel test execution.
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``OUTPUT_PREFIX prefix``
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May be used in conjunction with ``OUTPUT_DIR``.
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If specified, ``prefix`` is added to each output file name, like so
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``--out dir/prefix<test_name>``.
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``OUTPUT_SUFFIX suffix``
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May be used in conjunction with ``OUTPUT_DIR``.
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If specified, ``suffix`` is added to each output file name, like so
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``--out dir/<test_name>suffix``. This can be used to add a file extension to
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the output e.g. ".xml".
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``DL_PATHS path...``
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Specifies paths that need to be set for the dynamic linker to find shared
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libraries/DLLs when running the test executable (PATH/LD_LIBRARY_PATH respectively).
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These paths will both be set when retrieving the list of test cases from the
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test executable and when the tests are executed themselves. This requires
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cmake/ctest >= 3.22.
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#]=======================================================================]
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#------------------------------------------------------------------------------
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function(catch_discover_tests TARGET)
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cmake_parse_arguments(
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""
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""
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"TEST_PREFIX;TEST_SUFFIX;WORKING_DIRECTORY;TEST_LIST;REPORTER;OUTPUT_DIR;OUTPUT_PREFIX;OUTPUT_SUFFIX"
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"TEST_SPEC;EXTRA_ARGS;PROPERTIES;DL_PATHS"
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${ARGN}
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)
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if(NOT _WORKING_DIRECTORY)
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set(_WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
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endif()
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if(NOT _TEST_LIST)
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set(_TEST_LIST ${TARGET}_TESTS)
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endif()
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if (_DL_PATHS)
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if(${CMAKE_VERSION} VERSION_LESS "3.22.0")
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message(FATAL_ERROR "The DL_PATHS option requires at least cmake 3.22")
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endif()
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endif()
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## Generate a unique name based on the extra arguments
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string(SHA1 args_hash "${_TEST_SPEC} ${_EXTRA_ARGS} ${_REPORTER} ${_OUTPUT_DIR} ${_OUTPUT_PREFIX} ${_OUTPUT_SUFFIX}")
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string(SUBSTRING ${args_hash} 0 7 args_hash)
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# Define rule to generate test list for aforementioned test executable
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set(ctest_include_file "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_include-${args_hash}.cmake")
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set(ctest_tests_file "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_tests-${args_hash}.cmake")
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get_property(crosscompiling_emulator
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TARGET ${TARGET}
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PROPERTY CROSSCOMPILING_EMULATOR
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)
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add_custom_command(
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TARGET ${TARGET} POST_BUILD
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BYPRODUCTS "${ctest_tests_file}"
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COMMAND "${CMAKE_COMMAND}"
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-D "TEST_TARGET=${TARGET}"
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-D "TEST_EXECUTABLE=$<TARGET_FILE:${TARGET}>"
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-D "TEST_EXECUTOR=${crosscompiling_emulator}"
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-D "TEST_WORKING_DIR=${_WORKING_DIRECTORY}"
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-D "TEST_SPEC=${_TEST_SPEC}"
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-D "TEST_EXTRA_ARGS=${_EXTRA_ARGS}"
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-D "TEST_PROPERTIES=${_PROPERTIES}"
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-D "TEST_PREFIX=${_TEST_PREFIX}"
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-D "TEST_SUFFIX=${_TEST_SUFFIX}"
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-D "TEST_LIST=${_TEST_LIST}"
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-D "TEST_REPORTER=${_REPORTER}"
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-D "TEST_OUTPUT_DIR=${_OUTPUT_DIR}"
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-D "TEST_OUTPUT_PREFIX=${_OUTPUT_PREFIX}"
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-D "TEST_OUTPUT_SUFFIX=${_OUTPUT_SUFFIX}"
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-D "TEST_DL_PATHS=${_DL_PATHS}"
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-D "CTEST_FILE=${ctest_tests_file}"
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-P "${_CATCH_DISCOVER_TESTS_SCRIPT}"
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VERBATIM
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)
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file(WRITE "${ctest_include_file}"
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"if(EXISTS \"${ctest_tests_file}\")\n"
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" include(\"${ctest_tests_file}\")\n"
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"else()\n"
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" add_test(${TARGET}_NOT_BUILT-${args_hash} ${TARGET}_NOT_BUILT-${args_hash})\n"
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"endif()\n"
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)
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if(NOT ${CMAKE_VERSION} VERSION_LESS "3.10.0")
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# Add discovered tests to directory TEST_INCLUDE_FILES
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set_property(DIRECTORY
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APPEND PROPERTY TEST_INCLUDE_FILES "${ctest_include_file}"
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)
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else()
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# Add discovered tests as directory TEST_INCLUDE_FILE if possible
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get_property(test_include_file_set DIRECTORY PROPERTY TEST_INCLUDE_FILE SET)
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if (NOT ${test_include_file_set})
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set_property(DIRECTORY
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PROPERTY TEST_INCLUDE_FILE "${ctest_include_file}"
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)
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else()
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message(FATAL_ERROR
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"Cannot set more than one TEST_INCLUDE_FILE"
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)
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endif()
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endif()
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endfunction()
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###############################################################################
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set(_CATCH_DISCOVER_TESTS_SCRIPT
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${CMAKE_CURRENT_LIST_DIR}/CatchAddTests.cmake
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CACHE INTERNAL "Catch2 full path to CatchAddTests.cmake helper file"
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)
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