build/chip/chip_test_suite.gni

# Copyright (c) 2020 Project CHIP 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
#
# http://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.

import("//build_overrides/build.gni")
import("//build_overrides/chip.gni")
import("//build_overrides/googletest.gni")
import("//build_overrides/pigweed.gni")

import("${chip_root}/build/chip/tests.gni")
import("${dir_pw_unit_test}/test.gni")

assert(chip_build_tests)

declare_args() {
  # These may be overridden in args.gni to build platform-specific test binaries.
  test_executable_output_name = ""
  test_executable_output_name_suffix = ""
  test_executable_ldflags = []
}

# Define CHIP unit tests
#
# Simple usage
# chip_test_suite("tests") {
#   output_name = "libFooTests"
#
#   sources = [
#      "Common.h",      # add common sources here
#      "Common.cpp",
#   ]
#
#   test_sources = [
#     "TestFoo.cpp",
#     "TestBar.cpp",
#   ]
#
#   public_deps = [
#     "${chip_root}/src/lib/foo",         # add dependencies here
#   ]
# }

#
template("chip_test_suite") {
  _suite_name = target_name

  exclude_variables = [ "tests" ]
  if (chip_link_tests && chip_device_platform != "darwin") {
    # Common library shouldn't have all the individual unit tests, only the common sources.
    exclude_variables += [ "test_sources" ]
    # NOTE: For `Build on Darwin (clang, python_lib, simulated)` the test_sources must be in common lib.
  } else {
    # Common library should have all the individual unit tests, in addition to the common sources.
    if (!defined(invoker.sources)) {
      invoker.sources = []
    }
    if (defined(invoker.test_sources)) {
      invoker.sources += invoker.test_sources
    }
  }

  # Target for the common library.  Contains all the common sources, and sometimes all the individual test sources.
  if (chip_build_test_static_libraries) {
    _target_type = "static_library"
  } else {
    _target_type = "source_set"
  }
  target(_target_type, "${_suite_name}.lib") {
    forward_variables_from(invoker, "*", exclude_variables)

    output_dir = "${root_out_dir}/lib"

    if (!defined(invoker.public_deps)) {
      public_deps = []
    }

    deps = [ dir_pw_unit_test ]

    if (current_os != "zephyr" && current_os != "mbed" &&
        chip_device_platform != "efr32") {
      # Depend on stdio logging, and have it take precedence over the default platform backend
      public_deps += [ "${chip_root}/src/platform/logging:stdio" ]
    } else {
      public_deps += [ "${chip_root}/src/platform/logging:default" ]
    }
  }

  # Build a source_set or a flashable executable for each individual unit test source, which also includes the common files.
  if (chip_link_tests) {
    tests = []

    if (defined(invoker.test_sources)) {
      foreach(_test, invoker.test_sources) {
        _test_name = string_replace(_test, ".cpp", "")

        _test_output_dir = "${root_out_dir}/tests"
        if (defined(invoker.output_dir)) {
          _test_output_dir = invoker.output_dir
        }

        pw_test(_test_name) {
          # Forward certain variables from the invoker.
          forward_variables_from(invoker,
                                 [
                                   "deps",
                                   "public_deps",
                                   "cflags",
                                   "configs",
                                 ])

          # Link to the common lib for this suite so we get its `sources`.
          public_deps += [ ":${_suite_name}.lib" ]

          if (pw_unit_test_BACKEND == "$dir_pw_unit_test:googletest") {
            test_main = "$dir_pigweed/third_party/googletest:gmock_main"
          }

          # Set variables that the platform executable may need.
          if (test_executable_output_name != "") {
            output_name = test_executable_output_name + _test_name +
                          test_executable_output_name_suffix
          }
          ldflags = test_executable_ldflags

          # Add the individual test source file (e.g. "TestSomething.cpp").
          sources = [ _test ]

          output_dir = _test_output_dir
        }
        tests += [ _test_name ]
      }
    }

    group(_suite_name) {
      deps = []

      # Add each individual unit test.
      foreach(_test, tests) {
        deps += [ ":${_test}" ]
      }
    }

    if (chip_pw_run_tests) {
      group("${_suite_name}_run") {
        deps = []

        # Add the .run targets created by pw_test.
        foreach(_test, tests) {
          deps += [ ":${_test}.run" ]
        }
      }
    }
  } else {
    group(_suite_name) {
      deps = [ ":${_suite_name}.lib" ]
    }
  }
}