File: ECMAddTests.cmake

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# SPDX-FileCopyrightText: 2013 Alexander Richardson <arichardson.kde@gmail.com>
# SPDX-FileCopyrightText: 2015 Alex Merry <alex.merry@kde.org>
#
# SPDX-License-Identifier: BSD-3-Clause

#[=======================================================================[.rst:
ECMAddTests
-----------

Convenience functions for adding tests.

::

  ecm_add_tests(<sources>
      LINK_LIBRARIES <library> [<library> [...]]
      [NAME_PREFIX <prefix>]
      [GUI]
      [TARGET_NAMES_VAR <target_names_var>]
      [TEST_NAMES_VAR <test_names_var>]
      [WORKING_DIRECTORY <dir>] #  Since 5.111
  )

A convenience function for adding multiple tests, each consisting of a
single source file. For each file in <sources>, an executable target will be
created (the name of which will be the basename of the source file). This
will be linked against the libraries given with ``LINK_LIBRARIES``. Each
executable will be added as a test with the same name.

If ``NAME_PREFIX`` is given, this prefix will be prepended to the test names, but
not the target names. As a result, it will not prevent clashes between tests
with the same name in different parts of the project, but it can be used to
give an indication of where to look for a failing test.

If the flag ``GUI`` is passed the test binaries will be GUI executables, otherwise
the resulting binaries will be console applications (regardless of the value
of ``CMAKE_WIN32_EXECUTABLE`` or ``CMAKE_MACOSX_BUNDLE``). Be aware that this changes
the executable entry point on Windows (although some frameworks, such as Qt,
abstract this difference away).

The tests will be build with ``-DQT_FORCE_ASSERTS`` to enable assertions in the
test executable even for release builds.

The ``TARGET_NAMES_VAR`` and ``TEST_NAMES_VAR`` arguments, if given, should specify a
variable name to receive the list of generated target and test names,
respectively. This makes it convenient to apply properties to them as a
whole, for example, using ``set_target_properties()`` or  ``set_tests_properties()``.

The generated target executables will have the effects of ``ecm_mark_as_test()``
(from the :module:`ECMMarkAsTest` module) applied to it.

``WORKING_DIRECTORY`` sets the test property `WORKING_DIRECTORY
<https://cmake.org/cmake/help/latest/prop_test/WORKING_DIRECTORY.html>`_
in which to execute the test. By default the test will be run in
``${CMAKE_CURRENT_BINARY_DIR}``. The working directory can be specified using
generator expressions. Since 5.111.

::

  ecm_add_test(
      <sources>
      LINK_LIBRARIES <library> [<library> [...]]
      [TEST_NAME <name>]
      [NAME_PREFIX <prefix>]
      [GUI]
      [WORKING_DIRECTORY <dir>] #  Since 5.111
  )

This is a single-test form of ``ecm_add_tests`` that allows multiple source files
to be used for a single test. If using multiple source files, ``TEST_NAME`` must
be given; this will be used for both the target and test names (and, as with
``ecm_add_tests()``, the ``NAME_PREFIX`` argument will be prepended to the test name).

``WORKING_DIRECTORY`` sets the test property `WORKING_DIRECTORY
<https://cmake.org/cmake/help/latest/prop_test/WORKING_DIRECTORY.html>`_
in which to execute the test. By default the test will be run in
``${CMAKE_CURRENT_BINARY_DIR}``. The working directory can be specified using
generator expressions. Since 5.111.

Since pre-1.0.0.
#]=======================================================================]

include(ECMMarkAsTest)
include(ECMMarkNonGuiExecutable)

function(ecm_add_test)
  set(options GUI)
  # TARGET_NAME_VAR and TEST_NAME_VAR are undocumented args used by
  # ecm_add_tests
  set(oneValueArgs TEST_NAME NAME_PREFIX TARGET_NAME_VAR TEST_NAME_VAR WORKING_DIRECTORY)
  set(multiValueArgs LINK_LIBRARIES)
  cmake_parse_arguments(ARG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
  set(_sources ${ARG_UNPARSED_ARGUMENTS})
  list(LENGTH _sources _sourceCount)
  if(ARG_TEST_NAME)
    set(_targetname ${ARG_TEST_NAME})
  elseif(${_sourceCount} EQUAL "1")
    #use the source file name without extension as the testname
    get_filename_component(_targetname ${_sources} NAME_WE)
  else()
    #more than one source file passed, but no test name given -> error
    message(FATAL_ERROR "ecm_add_test() called with multiple source files but without setting \"TEST_NAME\"")
  endif()

  set(_testname ${ARG_NAME_PREFIX}${_targetname})
  set(gui_args)
  if(ARG_GUI)
      set(gui_args WIN32 MACOSX_BUNDLE)
  endif()
  add_executable(${_targetname} ${gui_args} ${_sources})
  if(NOT ARG_GUI)
    ecm_mark_nongui_executable(${_targetname})
  endif()
  set(test_args)
  if(DEFINED ARG_WORKING_DIRECTORY)
      list(APPEND test_args WORKING_DIRECTORY ${ARG_WORKING_DIRECTORY})
  endif()
  add_test(NAME ${_testname} COMMAND ${_targetname} ${test_args})
  target_link_libraries(${_targetname} ${ARG_LINK_LIBRARIES})
  target_compile_definitions(${_targetname} PRIVATE -DQT_FORCE_ASSERTS)
  ecm_mark_as_test(${_targetname})
  if (CMAKE_LIBRARY_OUTPUT_DIRECTORY)
    set(_plugin_path ${CMAKE_LIBRARY_OUTPUT_DIRECTORY})
    if (DEFINED ENV{QT_PLUGIN_PATH})
      if(CMAKE_HOST_SYSTEM_NAME STREQUAL "Windows")
        # https://stackoverflow.com/questions/59862894/how-do-i-make-a-list-in-cmake-with-the-semicolon-value
        set(PATHSEP "\\\;") # Don't want cmake to treat it like a list
      else() # e.g. Linux
        set(PATHSEP ":")
      endif()
      set(_plugin_path "${_plugin_path}${PATHSEP}$ENV{QT_PLUGIN_PATH}")
    endif()
    set_property(TEST ${_testname} PROPERTY ENVIRONMENT "QT_PLUGIN_PATH=${_plugin_path}")
  endif()
  if (ARG_TARGET_NAME_VAR)
    set(${ARG_TARGET_NAME_VAR} "${_targetname}" PARENT_SCOPE)
  endif()
  if (ARG_TEST_NAME_VAR)
    set(${ARG_TEST_NAME_VAR} "${_testname}" PARENT_SCOPE)
  endif()
endfunction()

function(ecm_add_tests)
  set(options GUI)
  set(oneValueArgs NAME_PREFIX TARGET_NAMES_VAR TEST_NAMES_VAR WORKING_DIRECTORY)
  set(multiValueArgs LINK_LIBRARIES)
  cmake_parse_arguments(ARG "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})
  if(ARG_GUI)
    set(_exe_type GUI)
  else()
    set(_exe_type "")
  endif()
  set(test_args)
  if(DEFINED ARG_WORKING_DIRECTORY)
      list(APPEND test_args WORKING_DIRECTORY ${ARG_WORKING_DIRECTORY})
  endif()
  set(test_names)
  set(target_names)
  foreach(_test_source ${ARG_UNPARSED_ARGUMENTS})
    ecm_add_test(${_test_source}
      NAME_PREFIX ${ARG_NAME_PREFIX}
      LINK_LIBRARIES ${ARG_LINK_LIBRARIES}
      TARGET_NAME_VAR target_name
      TEST_NAME_VAR test_name
      ${_exe_type}
      ${test_args}
    )
    list(APPEND _test_names "${test_name}")
    list(APPEND _target_names "${target_name}")
  endforeach()
  if (ARG_TARGET_NAMES_VAR)
    set(${ARG_TARGET_NAMES_VAR} "${_target_names}" PARENT_SCOPE)
  endif()
  if (ARG_TEST_NAMES_VAR)
    set(${ARG_TEST_NAMES_VAR} "${_test_names}" PARENT_SCOPE)
  endif()
endfunction()