targets/host/pw_add_test_executable.cmake

# Copyright 2022 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
include_guard(GLOBAL)

include("$ENV{PW_ROOT}/pw_build/pigweed.cmake")
include("$ENV{PW_ROOT}/pw_unit_test/test.cmake")

# Used by pw_add_test to instantiate unit test executables for the host.
#
# Required Args:
#
#   NAME: name for the desired executable
#   TEST_DEP: the target which provides the tests for this executable
#
function(pw_add_test_executable NAME TEST_DEP)
  set(num_positional_args 2)
  set(option_args)
  set(one_value_args)
  set(multi_value_args)
  pw_parse_arguments_strict(
      pw_add_test_executable "${num_positional_args}" "${option_args}"
      "${one_value_args}" "${multi_value_args}")

  # CMake requires a source file to determine the LINKER_LANGUAGE.
  add_executable("${NAME}" EXCLUDE_FROM_ALL
                 $<TARGET_PROPERTY:pw_build.empty,SOURCES>)

  set(test_backend "${pw_unit_test_GOOGLETEST_BACKEND}")
  if("${test_backend}" STREQUAL "pw_unit_test.light")
    set(main pw_unit_test.logging_main)
  elseif("${test_backend}" STREQUAL "pw_third_party.googletest")
    set(main pw_third_party.googletest.gmock_main)
  else()
    message(FATAL_ERROR
            "Unsupported test backend selected for host test executables")
  endif()

  pw_target_link_targets("${NAME}"
    PRIVATE
      "${main}"
      "${TEST_DEP}"
  )
endfunction(pw_add_test_executable)