git.m6w6.name Git - awesomized/libmemcached/blob - test/CMake/Catch.cmake

   1 # Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
   2 # file Copyright.txt or https://cmake.org/licensing for details.
   3
   4 #[=======================================================================[.rst:
   5 Catch
   6 -----
   7
   8 This module defines a function to help use the Catch test framework.
   9
  10 The :command:`catch_discover_tests` discovers tests by asking the compiled test
  11 executable to enumerate its tests.  This does not require CMake to be re-run
  12 when tests change.  However, it may not work in a cross-compiling environment,
  13 and setting test properties is less convenient.
  14
  15 This command is intended to replace use of :command:`add_test` to register
  16 tests, and will create a separate CTest test for each Catch test case.  Note
  17 that this is in some cases less efficient, as common set-up and tear-down logic
  18 cannot be shared by multiple test cases executing in the same instance.
  19 However, it provides more fine-grained pass/fail information to CTest, which is
  20 usually considered as more beneficial.  By default, the CTest test name is the
  21 same as the Catch name; see also ``TEST_PREFIX`` and ``TEST_SUFFIX``.
  22
  23 .. command:: catch_discover_tests
  24
  25   Automatically add tests with CTest by querying the compiled test executable
  26   for available tests::
  27
  28     catch_discover_tests(target
  29                          [TEST_SPEC arg1...]
  30                          [EXTRA_ARGS arg1...]
  31                          [WORKING_DIRECTORY dir]
  32                          [TEST_PREFIX prefix]
  33                          [TEST_SUFFIX suffix]
  34                          [PROPERTIES name1 value1...]
  35                          [TEST_LIST var]
  36     )
  37
  38   ``catch_discover_tests`` sets up a post-build command on the test executable
  39   that generates the list of tests by parsing the output from running the test
  40   with the ``--list-test-names-only`` argument.  This ensures that the full
  41   list of tests is obtained.  Since test discovery occurs at build time, it is
  42   not necessary to re-run CMake when the list of tests changes.
  43   However, it requires that :prop_tgt:`CROSSCOMPILING_EMULATOR` is properly set
  44   in order to function in a cross-compiling environment.
  45
  46   Additionally, setting properties on tests is somewhat less convenient, since
  47   the tests are not available at CMake time.  Additional test properties may be
  48   assigned to the set of tests as a whole using the ``PROPERTIES`` option.  If
  49   more fine-grained test control is needed, custom content may be provided
  50   through an external CTest script using the :prop_dir:`TEST_INCLUDE_FILES`
  51   directory property.  The set of discovered tests is made accessible to such a
  52   script via the ``<target>_TESTS`` variable.
  53
  54   The options are:
  55
  56   ``target``
  57     Specifies the Catch executable, which must be a known CMake executable
  58     target.  CMake will substitute the location of the built executable when
  59     running the test.
  60
  61   ``TEST_SPEC arg1...``
  62     Specifies test cases, wildcarded test cases, tags and tag expressions to
  63     pass to the Catch executable with the ``--list-test-names-only`` argument.
  64
  65   ``EXTRA_ARGS arg1...``
  66     Any extra arguments to pass on the command line to each test case.
  67
  68   ``WORKING_DIRECTORY dir``
  69     Specifies the directory in which to run the discovered test cases.  If this
  70     option is not provided, the current binary directory is used.
  71
  72   ``TEST_PREFIX prefix``
  73     Specifies a ``prefix`` to be prepended to the name of each discovered test
  74     case.  This can be useful when the same test executable is being used in
  75     multiple calls to ``catch_discover_tests()`` but with different
  76     ``TEST_SPEC`` or ``EXTRA_ARGS``.
  77
  78   ``TEST_SUFFIX suffix``
  79     Similar to ``TEST_PREFIX`` except the ``suffix`` is appended to the name of
  80     every discovered test case.  Both ``TEST_PREFIX`` and ``TEST_SUFFIX`` may
  81     be specified.
  82
  83   ``PROPERTIES name1 value1...``
  84     Specifies additional properties to be set on all tests discovered by this
  85     invocation of ``catch_discover_tests``.
  86
  87   ``TEST_LIST var``
  88     Make the list of tests available in the variable ``var``, rather than the
  89     default ``<target>_TESTS``.  This can be useful when the same test
  90     executable is being used in multiple calls to ``catch_discover_tests()``.
  91     Note that this variable is only available in CTest.
  92
  93 #]=======================================================================]
  94
  95 #------------------------------------------------------------------------------
  96 function(catch_discover_tests TARGET)
  97   cmake_parse_arguments(
  98     ""
  99     ""
 100     "TEST_PREFIX;TEST_SUFFIX;WORKING_DIRECTORY;TEST_LIST"
 101     "TEST_SPEC;EXTRA_ARGS;PROPERTIES"
 102     ${ARGN}
 103   )
 104
 105   if(NOT _WORKING_DIRECTORY)
 106     set(_WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}")
 107   endif()
 108   if(NOT _TEST_LIST)
 109     set(_TEST_LIST ${TARGET}_TESTS)
 110   endif()
 111
 112   ## Generate a unique name based on the extra arguments
 113   string(SHA1 args_hash "${_TEST_SPEC} ${_EXTRA_ARGS}")
 114   string(SUBSTRING ${args_hash} 0 7 args_hash)
 115
 116   # Define rule to generate test list for aforementioned test executable
 117   set(ctest_include_file "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_include-${args_hash}.cmake")
 118   set(ctest_tests_file "${CMAKE_CURRENT_BINARY_DIR}/${TARGET}_tests-${args_hash}.cmake")
 119   get_property(crosscompiling_emulator
 120     TARGET ${TARGET}
 121     PROPERTY CROSSCOMPILING_EMULATOR
 122   )
 123   add_custom_command(
 124     TARGET ${TARGET} POST_BUILD
 125     BYPRODUCTS "${ctest_tests_file}"
 126     COMMAND "${CMAKE_COMMAND}"
 127             -D "TEST_TARGET=${TARGET}"
 128             -D "TEST_EXECUTABLE=$<TARGET_FILE:${TARGET}>"
 129             -D "TEST_EXECUTOR=${crosscompiling_emulator}"
 130             -D "TEST_WORKING_DIR=${_WORKING_DIRECTORY}"
 131             -D "TEST_SPEC=${_TEST_SPEC}"
 132             -D "TEST_EXTRA_ARGS=${_EXTRA_ARGS}"
 133             -D "TEST_PROPERTIES=${_PROPERTIES}"
 134             -D "TEST_PREFIX=${_TEST_PREFIX}"
 135             -D "TEST_SUFFIX=${_TEST_SUFFIX}"
 136             -D "TEST_LIST=${_TEST_LIST}"
 137             -D "CTEST_FILE=${ctest_tests_file}"
 138             -P "${_CATCH_DISCOVER_TESTS_SCRIPT}"
 139     VERBATIM
 140   )
 141
 142   file(WRITE "${ctest_include_file}"
 143     "if(EXISTS \"${ctest_tests_file}\")\n"
 144     "  include(\"${ctest_tests_file}\")\n"
 145     "else()\n"
 146     "  add_test(${TARGET}_NOT_BUILT-${args_hash} ${TARGET}_NOT_BUILT-${args_hash})\n"
 147     "endif()\n"
 148   )
 149
 150   if(NOT ${CMAKE_VERSION} VERSION_LESS "3.10.0")
 151     # Add discovered tests to directory TEST_INCLUDE_FILES
 152     set_property(DIRECTORY
 153       APPEND PROPERTY TEST_INCLUDE_FILES "${ctest_include_file}"
 154     )
 155   else()
 156     # Add discovered tests as directory TEST_INCLUDE_FILE if possible
 157     get_property(test_include_file_set DIRECTORY PROPERTY TEST_INCLUDE_FILE SET)
 158     if (NOT ${test_include_file_set})
 159       set_property(DIRECTORY
 160         PROPERTY TEST_INCLUDE_FILE "${ctest_include_file}"
 161       )
 162     else()
 163       message(FATAL_ERROR
 164         "Cannot set more than one TEST_INCLUDE_FILE"
 165       )
 166     endif()
 167   endif()
 168
 169 endfunction()
 170
 171 ###############################################################################
 172
 173 set(_CATCH_DISCOVER_TESTS_SCRIPT
 174   ${CMAKE_CURRENT_LIST_DIR}/CatchAddTests.cmake
 175 )