testing/test.gni

# Copyright 2015 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# ==============================================================================
# TEST SETUP
# ==============================================================================

import("//build/config/chromeos/args.gni")
import("//build/config/chromeos/ui_mode.gni")
import("//build/config/devtools.gni")
import("//build/config/gclient_args.gni")
import("//build/config/rts.gni")
import("//build/rust/mixed_executable.gni")
import("//build/rust/mixed_shared_library.gni")
import("//build_overrides/build.gni")

declare_args() {
  # Some component repos (e.g. ANGLE) import //testing but do not have
  # "location_tags.json", and so we don't want to try and upload the tags
  # for their tests.
  # And, some build configs may simply turn off generation altogether.
  tests_have_location_tags = generate_location_tags
}

# On Fuchsia, the test executable has a suffix and is a dependency of the
# common |target_name| target. For `visibility`, the executable must be
# specified. Cross-platform targets that include `test` targets in their
# visibility lists, add `${exec_target_suffix}` immediately after the test
# target name. This is not necessary when the target is a `source_set`.
if (is_fuchsia) {
  exec_target_suffix = "__exec"
} else {
  exec_target_suffix = ""
}

if (is_android) {
  import("//build/config/android/config.gni")
  import("//build/config/android/create_unwind_table.gni")
  import("//build/config/android/extract_unwind_tables.gni")
  import("//build/config/android/rules.gni")
  import("//build/config/sanitizers/sanitizers.gni")
} else if (is_fuchsia) {
  import("//build/config/chromecast_build.gni")
  import("//build/config/fuchsia/generate_runner_scripts.gni")
  import("//build/config/fuchsia/package.gni")
  import("//third_party/fuchsia-sdk/sdk/build/cmc.gni")
} else if (is_chromeos && is_chromeos_device) {
  import("//build/config/chromeos/rules.gni")
  import("//build/config/sanitizers/sanitizers.gni")
  import("//build/util/generate_wrapper.gni")
} else if (is_ios) {
  import("//build/config/ios/ios_sdk.gni")
  import("//build/config/ios/ios_test_runner_wrapper.gni")
  import("//build/config/ios/rules.gni")
} else {
  import("//build/config/sanitizers/sanitizers.gni")
  import("//build/util/generate_wrapper.gni")
}

template("mixed_test") {
  assert(defined(invoker.target_type) && invoker.target_type != "")
  target("mixed_${invoker.target_type}", target_name) {
    forward_variables_from(invoker,
                           "*",
                           TESTONLY_AND_VISIBILITY + [ "target_type" ])
    forward_variables_from(invoker, TESTONLY_AND_VISIBILITY)
    if (!defined(rs_configs)) {
      rs_configs = []
    }
    rs_configs += [ "//build/rust:test" ]

    # The crate_root is generated and should not be specified.
    assert(!defined(rs_crate_root))
    rs_generate_crate_root = true

    # We could automatically add `rs_deps += [ "//testing/rust_gtest_interop" ]`
    # if `rs_sources` is non-empty. But we don't automatically provide
    # //testing/gtest either so it would be asymmetric and could break in that
    # case. So, we act instead as if //testing/rust_gtest_interop is part of the
    # //testing/gtest dependency. If you add one, and have `rs_sources` listed,
    # you get both.
    _gtest_is_in_deps = false
    if (defined(rs_sources) && rs_sources != [] && defined(deps) &&
        deps != []) {
      foreach(dep, deps) {
        if (dep == "//testing/gtest") {
          _gtest_is_in_deps = true
        }
      }
    }
    if (_gtest_is_in_deps) {
      if (!defined(rs_deps)) {
        rs_deps = []
      }
      rs_deps += [ "//testing/rust_gtest_interop" ]
    }
  }
}

# Define a test as an executable (or apk on Android) with the "testonly" flag
# set.
# Variable:
#   use_xvfb: (optional) whether to run the executable under Xvfb.
#   use_raw_android_executable: Use mixed_executable() rather than
#      android_apk().
#   use_native_activity: Test implements ANativeActivity_onCreate().
#   use_cfv2: (Fuchsia, optional): build the test as a framework v2 component;
#      see https://fuchsia.dev/fuchsia-src/concepts/components/v2 for details.
#      The default value is true; set it to false explicitly to omit a .cm
#      manifest from the package.
#   use_cfv1: (Fuchsia, optional): build the test as a framework v1 component.
#      The default value is true; set it to false explicitly to omit a .cmx
#      manifest from the package.
#   test_runner_shard: (Fuchsia, optional): for CFv2 tests, use the given test
#      runner shard rather than the default shard for the ELF runner. This is
#      useful, for example, to use the elf_test_ambient_exec_runner for tests
#      that require job_policy_ambient_mark_vmo_exec.
#   is_xctest: (iOS, optional) whether to build the executable as XCTest.
#      Similar to the GN arg 'enable_run_ios_unittests_with_xctest' but
#      for build targets.
#   allow_cleartext_traffic: (Android, optional) whether to allow cleartext
#      network requests during the test.
template("test") {
  # Ensures the rts file exists and if not, creates a dummy file
  if (use_rts) {
    action("${target_name}__rts_filters") {
      script = "//build/add_rts_filters.py"
      rts_file = "${root_build_dir}/gen/rts/${invoker.target_name}.filter"
      args = [ rebase_path(rts_file, root_build_dir) ]
      outputs = [ rts_file ]
    }
  }

  testonly = true
  if (!is_ios) {
    assert(!defined(invoker.is_xctest) || !invoker.is_xctest,
           "is_xctest can be set only for iOS builds")
  }
  if (!is_android) {
    assert(!defined(invoker.allow_cleartext_traffic),
           "allow_cleartext_traffic can be set only for Android tests")
  }

  if (is_android) {
    assert(!defined(invoker.use_xvfb) || !invoker.use_xvfb)

    _use_default_launcher =
        !defined(invoker.use_default_launcher) || invoker.use_default_launcher
    if (!defined(invoker.use_raw_android_executable)) {
      # Checkouts where build_with_chromium == false often have a custom GN
      # template wrapper around test() which sets use_default_launcher == false.
      # Set the _use_raw_android_executable default so that test() targets which
      # do not use the custom wrapper
      # (1) Do not cause "gn gen" to fail
      # (2) Do not need to be moved into if(build_with_chromium) block.
      _use_raw_android_executable =
          !build_with_chromium && _use_default_launcher
    } else {
      not_needed([ "_use_default_launcher" ])
      _use_raw_android_executable = invoker.use_raw_android_executable
    }

    # output_name is used to allow targets with the same name but in different
    # packages to still produce unique runner scripts.
    _output_name = invoker.target_name
    if (defined(invoker.output_name)) {
      _output_name = invoker.output_name
    }

    _test_runner_target = "${_output_name}__test_runner_script"
    _wrapper_script_vars = [
      "ignore_all_data_deps",
      "shard_timeout",
    ]

    assert(_use_raw_android_executable || enable_java_templates)

    if (_use_raw_android_executable) {
      not_needed(invoker, [ "add_unwind_tables_in_apk" ])

      _exec_target = "${target_name}__exec"
      _dist_target = "${target_name}__dist"
      _exec_output =
          "$target_out_dir/${invoker.target_name}/${invoker.target_name}"

      mixed_test(_exec_target) {
        target_type = "executable"

        # Configs will always be defined since we set_defaults in
        # BUILDCONFIG.gn.
        configs = []
        forward_variables_from(
            invoker,
            "*",
            TESTONLY_AND_VISIBILITY + _wrapper_script_vars + [
                  "data_deps",
                  "extra_dist_files",
                ])

        # Thanks to the set_defaults() for test(), configs are initialized with
        # the default shared_library configs rather than executable configs.
        configs -= [
          "//build/config:shared_library_config",
          "//build/config/android:hide_all_but_jni",
        ]
        configs += [ "//build/config:executable_config" ]

        if (defined(invoker.data_deps)) {
          data_deps = invoker.data_deps
        } else {
          data_deps = []
        }
        if (!defined(data)) {
          data = []
        }
        if (tests_have_location_tags) {
          data += [ "//testing/location_tags.json" ]
        }

        # Don't output to the root or else conflict with the group() below.
        output_name = rebase_path(_exec_output, root_out_dir)

        if (use_rts) {
          data_deps += [ ":${invoker.target_name}__rts_filters" ]
        }
      }

      create_native_executable_dist(_dist_target) {
        dist_dir = "$root_out_dir/$target_name"
        binary = _exec_output
        deps = [ ":$_exec_target" ]
        if (defined(invoker.extra_dist_files)) {
          extra_files = invoker.extra_dist_files
        }

        if (use_rts) {
          if (!defined(data_deps)) {
            data_deps = []
          }
          data_deps += [ ":${invoker.target_name}__rts_filters" ]
        }
      }
    } else {
      _library_target = "${target_name}__library"
      _library_crate_name = "${target_name}_library"
      _apk_target = "${target_name}__apk"
      _apk_specific_vars = [
        "allow_cleartext_traffic",
        "android_manifest",
        "android_manifest_dep",
        "android_manifest_template",
        "app_as_shared_lib",
        "enable_multidex",
        "generate_final_jni",
        "product_config_java_packages",
        "loadable_modules",
        "loadable_module_deps",
        "min_sdk_version",
        "proguard_configs",
        "proguard_enabled",
        "srcjar_deps",
        "target_sdk_version",
        "use_default_launcher",
        "use_native_activity",
      ]

      # Adds the unwind tables from unstripped binary as an asset file in the
      # apk, if |add_unwind_tables_in_apk| is specified by the test.
      if (defined(invoker.add_unwind_tables_in_apk) &&
          invoker.add_unwind_tables_in_apk) {
        _unwind_table_asset_name = "${target_name}_unwind_assets"
        if (use_android_unwinder_v2) {
          unwind_table_asset_v2(_unwind_table_asset_name) {
            library_target = _library_target
            deps = [ ":$_library_target" ]
          }
        } else {
          unwind_table_asset(_unwind_table_asset_name) {
            library_target = _library_target
            deps = [ ":$_library_target" ]
          }
        }
      }

      mixed_test(_library_target) {
        target_type = "shared_library"

        # Configs will always be defined since we set_defaults in
        # BUILDCONFIG.gn.
        configs = []  # Prevent list overwriting warning.
        configs = invoker.configs

        # Use a crate name that avoids creating a warning due to double
        # underscore (ie. `__`).
        rs_crate_name = _library_crate_name

        forward_variables_from(
            invoker,
            "*",
            [ "deps" ] + _apk_specific_vars + _wrapper_script_vars +
                TESTONLY_AND_VISIBILITY)

        # Native targets do not need to depend on java targets. Filter them out
        # so that the shared library can be built without needing to wait for
        # dependent java targets.
        deps = []
        if (defined(invoker.deps)) {
          foreach(_dep, invoker.deps) {
            _target_label = get_label_info(_dep, "label_no_toolchain")
            if (filter_exclude([ _target_label ], java_target_patterns) != []) {
              deps += [ _dep ]
            }
          }
        }

        if (_use_default_launcher) {
          deps += [ "//testing/android/native_test:native_test_native_code" ]
        }
      }
      unittest_apk(_apk_target) {
        forward_variables_from(invoker, _apk_specific_vars)
        shared_library = ":$_library_target"
        apk_name = invoker.target_name
        if (defined(invoker.output_name)) {
          apk_name = invoker.output_name
          install_script_name = "install_${invoker.output_name}"
        }

        if (defined(invoker.deps)) {
          deps = invoker.deps
        } else {
          deps = []
        }
        if (defined(loadable_module_deps)) {
          deps += loadable_module_deps
        }

        # Add the Java classes so that each target does not have to do it.
        if (_use_default_launcher) {
          deps += [ "//base/test:test_support_java" ]
        }

        if (defined(_unwind_table_asset_name)) {
          deps += [ ":${_unwind_table_asset_name}" ]
        }

        if (use_rts) {
          data_deps = [ ":${invoker.target_name}__rts_filters" ]
        }
      }
    }

    test_runner_script(_test_runner_target) {
      forward_variables_from(invoker, _wrapper_script_vars)

      if (_use_raw_android_executable) {
        executable_dist_dir = "$root_out_dir/$_dist_target"
        data_deps = [ ":$_exec_target" ]
      } else {
        apk_target = ":$_apk_target"
        incremental_apk = incremental_install

        # Dep needed for the test runner .runtime_deps file to pick up data
        # deps from the forward_variables_from(invoker, "*") on the library.
        data_deps = [ ":$_library_target" ]
      }
      test_name = _output_name
      test_suite = _output_name
      test_type = "gtest"

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }

    # Create a wrapper script rather than using a group() in order to ensure
    # "ninja $target_name" always works. If this was a group(), then GN would
    # not create a top-level alias for it if a target exists in another
    # directory with the same $target_name.
    # Also - bots run this script directly for "components_perftests".
    generate_wrapper(target_name) {
      forward_variables_from(invoker, [ "visibility" ])
      executable = "$root_build_dir/bin/run_$_output_name"
      wrapper_script = "$root_build_dir/$_output_name"
      deps = [ ":$_test_runner_target" ]
      if (_use_raw_android_executable) {
        deps += [ ":$_dist_target" ]
      } else {
        # Dep needed for the swarming .isolate file to pick up data
        # deps from the forward_variables_from(invoker, "*") on the library.
        deps += [
          ":$_apk_target",
          ":$_library_target",
        ]
      }

      if (defined(invoker.data_deps)) {
        data_deps = invoker.data_deps
      } else {
        data_deps = []
      }

      data_deps += [ "//testing:test_scripts_shared" ]

      if (tests_have_location_tags) {
        data = [ "//testing/location_tags.json" ]
      }

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }
  } else if (is_fuchsia) {
    assert(!defined(invoker.use_xvfb) || !invoker.use_xvfb)

    # It's meaningless to omit both types of manifest from the package.
    assert(!defined(invoker.use_cfv2) || invoker.use_cfv2 ||
           !defined(invoker.use_cfv1) || invoker.use_cfv1)

    _output_name = invoker.target_name
    _pkg_target = "${_output_name}_pkg"
    _exec_target = "${_output_name}__exec"
    _program_name = get_label_info(":${_exec_target}", "name")
    _test_component_targets = []

    # Generate a CFv2 manifest unless the target opts-out via `use_cfv2=false`.
    if (!defined(invoker.use_cfv2) || invoker.use_cfv2) {
      # Generate a CML fragment that provides the program name.
      _test_program_fragment_target = "${target_name}_program-fragment"
      _test_program_fragment =
          "${target_out_dir}/${target_name}_program.test-cml"
      generated_file(_test_program_fragment_target) {
        contents = "{ program: { binary: \"${_program_name}\",},}"
        outputs = [ _test_program_fragment ]
      }

      _test_runner_shard =
          "//build/config/fuchsia/test/elf_test_runner.shard.test-cml"
      if (defined(invoker.test_runner_shard)) {
        _test_runner_shard = invoker.test_runner_shard
      }

      # Collate the complete set of elements to include in the test component's
      # manifest.
      _manifest_fragments = [
        "//build/config/fuchsia/test/chromium_test_facet.shard.test-cml",
        "//build/config/fuchsia/test/minimum.shard.test-cml",
        _test_program_fragment,
        _test_runner_shard,
      ]

      _test_component_manifest = "${target_out_dir}/${target_name}.cml"
      _merged_manifest_name = "${_output_name}.cml"

      if (defined(invoker.additional_manifest_fragments)) {
        _manifest_fragments +=
            filter_include(invoker.additional_manifest_fragments,
                           [
                             "*.cml",
                             "*.test-cml",
                           ])
      }

      # Generate the test component manifest from the specified elements.
      _test_component_manifest_target = "${target_name}_component-manifest"
      cmc_merge(_test_component_manifest_target) {
        sources = _manifest_fragments
        output_name = "${_merged_manifest_name}"
        deps = [ ":${_test_program_fragment_target}" ]
      }

      # Define the test component, dependent on the generated manifest, and the
      # test executable target.
      _test_component_target = "${target_name}_component"
      fuchsia_component(_test_component_target) {
        deps = [ ":$_test_component_manifest_target" ]
        data_deps = [ ":$_exec_target" ]
        manifest = _test_component_manifest
        visibility = [ ":*" ]
      }

      _test_component_targets += [ ":${_test_component_target}" ]
    }

    # Generate a CFv1 manifest unless the target opts-out via `use_cfv1=false`.
    if (!defined(invoker.use_cfv1) || invoker.use_cfv1) {
      # Generate a CMX fragment that provides the program name.
      _test_program_fragment_target_v1 = "${target_name}_program-fragment_v1"
      _test_program_fragment_v1 =
          "${target_out_dir}/${target_name}_program.test-cmx"
      generated_file(_test_program_fragment_target_v1) {
        contents = "{ \"program\": { \"binary\": \"${_program_name}\"}}"
        outputs = [ _test_program_fragment_v1 ]
      }

      # Collate the complete set of elements to include in the test component's
      # manifest.
      _manifest_fragments_v1 = [
        "//build/config/fuchsia/test/minimum_capabilities.test-cmx",
        _test_program_fragment_v1,
      ]

      _test_component_manifest_v1 = "${target_out_dir}/${target_name}.cmx"
      _merged_manifest_name_v1 = "${_output_name}.cmx"

      if (defined(invoker.additional_manifest_fragments)) {
        _manifest_fragments_v1 +=
            filter_include(invoker.additional_manifest_fragments,
                           [
                             "*.cmx",
                             "*.test-cmx",
                           ])
      }

      # Generate the test component manifest from the specified elements.
      _test_component_manifest_target_v1 =
          "${target_name}_component-manifest_v1"
      cmc_merge(_test_component_manifest_target_v1) {
        sources = _manifest_fragments_v1
        output_name = "${_merged_manifest_name_v1}"
        deps = [ ":${_test_program_fragment_target_v1}" ]
      }

      # Define the test component, dependent on the generated manifest, and the
      # test executable target.
      _test_component_target_v1 = "${target_name}_component_v1"
      fuchsia_component(_test_component_target_v1) {
        deps = [ ":$_test_component_manifest_target_v1" ]
        data_deps = [ ":$_exec_target" ]
        manifest = _test_component_manifest_v1
        visibility = [ ":*" ]
      }

      _test_component_targets += [ ":${_test_component_target_v1}" ]
    }

    # Define components for each entry in |additional_manifests|, if any. Since
    # manifests may themselves depend-on the outputs of |deps|, these components
    # must each individually depend on |invoker.deps|.
    if (defined(invoker.additional_manifests)) {
      foreach(filename, invoker.additional_manifests) {
        _additional_component_target =
            target_name + "_" + get_path_info(filename, "name")
        _test_component_targets += [ ":${_additional_component_target}" ]
        fuchsia_component(_additional_component_target) {
          forward_variables_from(invoker, [ "testonly" ])
          data_deps = [ ":$_exec_target" ]
          visibility = [ ":*" ]
          manifest = filename

          # Depend on |invoker.deps|, in case it includes a dependency that
          # creates this additional component's manifest.
          if (defined(invoker.deps)) {
            deps = invoker.deps
          }
        }
      }
    }

    # Define the package target that will bundle the test and additional
    # components and their data.
    fuchsia_package(_pkg_target) {
      forward_variables_from(invoker,
                             [
                               "excluded_files",
                               "excluded_dirs",
                             ])
      package_name = _output_name
      deps = _test_component_targets

      if (!defined(excluded_dirs)) {
        excluded_dirs = []
      }
      excluded_dirs += [ devtools_root_location ]
    }

    # |target_name| refers to the package-runner rule, so that building
    # "base_unittests" will build not only the executable, component, and
    # package, but also the script required to run them.
    fuchsia_test_runner(target_name) {
      forward_variables_from(invoker,
                             [
                               "data",
                               "data_deps",
                               "package_deps",
                               "use_cfv2",
                               "use_test_server",
                             ])

      is_test_exe = true
      package = ":$_pkg_target"
      package_name = _output_name

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

      if (!defined(data)) {
        data = []
      }
      if (tests_have_location_tags) {
        data += [ "//testing/location_tags.json" ]
      }

      if (!defined(data_deps)) {
        data_deps = []
      }

      data_deps += [ "//testing:test_scripts_shared" ]

      # TODO(crbug.com/1199334): Because perfetto unit test is defined outside
      # of chromium, the dependency to the filter file is added here.
      data_deps += [ "//testing/buildbot/filters:perfetto_unittests_filters" ]

      if (use_rts) {
        data_deps += [ ":${target_name}__rts_filters" ]
      }
    }

    mixed_test(_exec_target) {
      target_type = "executable"
      forward_variables_from(invoker, "*", TESTONLY_AND_VISIBILITY)
      output_name = _exec_target
    }
  } else if (is_ios) {
    assert(!defined(invoker.use_xvfb) || !invoker.use_xvfb)
    _runtime_deps_file = "$root_out_dir/${target_name}.runtime_deps"

    declare_args() {
      # Keep the unittest-as-xctest functionality defaulted to off until the
      # bots are updated to handle it properly.
      # TODO(crbug.com/1001667): Remove this arg once the iOS test runner
      # supports running unittests with xctest.
      enable_run_ios_unittests_with_xctest = false
    }

    _test_target = target_name
    _output_name = target_name
    if (defined(invoker.output_name)) {
      _output_name = invoker.output_name
    }

    _wrapper_output_name = "run_${target_name}"
    ios_test_runner_wrapper(_wrapper_output_name) {
      forward_variables_from(invoker,
                             [
                               "data",
                               "deps",
                               "executable_args",
                               "output_name",
                               "retries",
                               "shards",
                             ])

      _root_build_dir = rebase_path("${root_build_dir}", root_build_dir)

      if (!defined(executable_args)) {
        executable_args = []
      }
      executable_args += [
        "--app",
        "@WrappedPath(${_root_build_dir}/${_test_target}.app)",
      ]

      wrapper_output_name = "${_wrapper_output_name}"

      if (!defined(data)) {
        data = []
      }
      if (tests_have_location_tags) {
        data += [ "//testing/location_tags.json" ]
      }
    }

    _resources_bundle_data = target_name + "_resources_bundle_data"

    bundle_data(_resources_bundle_data) {
      visibility = [ ":$_test_target" ]
      sources = [ "//testing/gtest_ios/Default.png" ]
      outputs = [ "{{bundle_resources_dir}}/{{source_file_part}}" ]
    }

    force_xctest = enable_run_ios_unittests_with_xctest ||
                   (defined(invoker.is_xctest) && invoker.is_xctest)

    if (force_xctest) {
      ios_test_target_type = "ios_xctest_test"
    } else {
      ios_test_target_type = "ios_app_bundle"
    }

    target(ios_test_target_type, _test_target) {
      testonly = true

      if (force_xctest && build_with_chromium) {
        xctest_module_target = "//base/test:google_test_runner"
      }

      forward_variables_from(invoker, "*", TESTONLY_AND_VISIBILITY)

      # Provide sensible defaults in case invoker did not define any of those
      # required variables.
      if (!defined(info_plist) && !defined(info_plist_target)) {
        info_plist = "//testing/gtest_ios/unittest-Info.plist"
      }

      if (ios_use_shared_bundle_id_for_test_apps) {
        bundle_identifier = shared_bundle_id_for_test_apps
        not_needed([ "_output_name" ])
      } else {
        bundle_identifier = "$ios_app_bundle_id_prefix.chrome." +
                            string_replace(_output_name, "_", "-")
      }

      if (!defined(bundle_deps)) {
        bundle_deps = []
      }
      bundle_deps += [ ":$_resources_bundle_data" ]

      if (!defined(data_deps)) {
        data_deps = []
      }

      data_deps += [ "//testing:test_scripts_shared" ]

      # Include the generate_wrapper as part of data_deps
      data_deps += [ ":${_wrapper_output_name}" ]
      write_runtime_deps = _runtime_deps_file

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }
  } else if ((is_chromeos_ash || (is_chromeos_lacros && is_chromeos_device)) &&
             cros_board != "") {
    assert(!defined(invoker.use_xvfb) || !invoker.use_xvfb)

    # Building for a cros board (ie: not linux-chromeos or linux-lacros).

    _gen_runner_target = "${target_name}__runner"
    _runtime_deps_file =
        "$root_out_dir/gen.runtime/" + get_label_info(target_name, "dir") +
        "/" + get_label_info(target_name, "name") + ".runtime_deps"

    _generated_script = "$root_build_dir/bin/run_" + invoker.target_name
    if (is_skylab) {
      generate_skylab_deps(_gen_runner_target) {
        generated_script = _generated_script
        test_exe = invoker.target_name
      }
    } else {
      generate_runner_script(_gen_runner_target) {
        generated_script = _generated_script
        test_exe = invoker.target_name
        runtime_deps_file = _runtime_deps_file

        if (is_chromeos_lacros) {
          # At build time, Lacros tests don't know whether they'll run on VM or
          # HW, and instead, these flags are specified at runtime when invoking
          # the generated runner script.
          skip_generating_board_args = true
        }

        if (tests_have_location_tags) {
          data = [ "//testing/location_tags.json" ]
        }

        if (use_rts) {
          data_deps = [ ":${invoker.target_name}__rts_filters" ]
        }
      }
    }

    mixed_test(target_name) {
      target_type = "executable"
      forward_variables_from(invoker, "*", TESTONLY_AND_VISIBILITY)
      forward_variables_from(invoker, [ "visibility" ])
      if (!defined(deps)) {
        deps = []
      }
      if (!defined(data)) {
        data = []
      }

      # We use a special trigger script for CrOS hardware tests.
      data += [ "//testing/trigger_scripts/chromeos_device_trigger.py" ]

      output_name = target_name
      write_runtime_deps = _runtime_deps_file
      data += [ _runtime_deps_file ]
      deps += [ ":$_gen_runner_target" ]

      if (!defined(data_deps)) {
        data_deps = []
      }

      data_deps += [ "//testing:test_scripts_shared" ]

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }
  } else if (is_chromeos_lacros && !is_chromeos_device) {
    _runtime_deps_file = "$root_out_dir/${target_name}.runtime_deps"
    _executable = target_name
    _gen_runner_target = "${target_name}__runner"

    if (defined(invoker.use_xvfb)) {
      _use_xvfb = invoker.use_xvfb
    } else {
      _use_xvfb = false
    }

    # When use_xvfb is set by the invoker, it indicates that running this test
    # target requires a window, and in lacros build, ash-chrome serves as the
    # display server. Note that even though the tests themselves do not require
    # xvfb anymore, xvfb.py is still needed to invoke the lacros test runner
    # because ash-chrome is based on x11.
    _use_ash_chrome = _use_xvfb

    generate_wrapper(_gen_runner_target) {
      wrapper_script = "$root_build_dir/bin/run_" + _executable

      data = []
      data_deps = [ "//testing:test_scripts_shared" ]

      if (_use_xvfb) {
        executable = "//testing/xvfb.py"
        data += [ "//.vpython3" ]
      } else {
        executable = "//testing/test_env.py"
      }
      if (tests_have_location_tags) {
        data += [ "//testing/location_tags.json" ]
      }

      executable_args = [
        "@WrappedPath(../../build/lacros/test_runner.py)",
        "test",
        "@WrappedPath(./${_executable})",
        "--test-launcher-bot-mode",
      ]

      if (_use_ash_chrome) {
        executable_args += [ "--ash-chrome-path" ]

        # Can't use --ash-chrome-path=path because WrappedPath
        # won't be expanded for that usage.
        executable_args += [ "@WrappedPath(./ash_clang_x64/test_ash_chrome)" ]
      }

      if (is_asan) {
        executable_args += [ "--asan=true" ]
      }
      if (is_msan) {
        executable_args += [ "--msan=true" ]
      }
      if (is_tsan) {
        executable_args += [ "--tsan=true" ]
      }
      if (use_cfi_diag) {
        executable_args += [ "--cfi-diag=true" ]
      }

      data += [ "//build/lacros/test_runner.py" ]

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }

    mixed_test(target_name) {
      target_type = "executable"
      forward_variables_from(invoker, "*", TESTONLY_AND_VISIBILITY)
      forward_variables_from(invoker, [ "visibility" ])
      if (!defined(deps)) {
        deps = []
      }

      if (!defined(data_deps)) {
        data_deps = []
      }

      data_deps += [ "//testing:test_scripts_shared" ]

      write_runtime_deps = _runtime_deps_file
      deps += [ ":$_gen_runner_target" ]
      if (_use_ash_chrome && also_build_ash_chrome) {
        data_deps += [ "//chrome/test:test_ash_chrome(//build/toolchain/linux:ash_clang_x64)" ]
      }

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }
  } else if (!is_nacl) {
    if (is_mac || is_win) {
      assert(!defined(invoker.use_xvfb) || !invoker.use_xvfb)
    }

    _runtime_deps_file = "$root_out_dir/${target_name}.runtime_deps"
    _executable = target_name
    _gen_runner_target = "${target_name}__runner"

    if ((is_linux || is_chromeos) && defined(invoker.use_xvfb)) {
      _use_xvfb = invoker.use_xvfb
    } else {
      _use_xvfb = false
    }

    generate_wrapper(_gen_runner_target) {
      wrapper_script = "$root_build_dir/bin/run_" + _executable

      data = []
      data_deps = [ "//testing:test_scripts_shared" ]

      if (_use_xvfb) {
        executable = "//testing/xvfb.py"
      } else {
        executable = "//testing/test_env.py"
      }
      if (tests_have_location_tags) {
        data += [ "//testing/location_tags.json" ]
      }

      executable_args = [
        "@WrappedPath(./${_executable})",
        "--test-launcher-bot-mode",
      ]
      if (is_asan) {
        executable_args += [ "--asan=true" ]
      }
      if (is_msan) {
        executable_args += [ "--msan=true" ]
      }
      if (is_tsan) {
        executable_args += [ "--tsan=true" ]
      }
      if (use_cfi_diag) {
        executable_args += [ "--cfi-diag=true" ]
      }

      data += [ "//.vpython" ]

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }

    mixed_test(target_name) {
      target_type = "executable"
      forward_variables_from(invoker,
                             "*",
                             TESTONLY_AND_VISIBILITY + [ "use_xvfb" ])
      forward_variables_from(invoker, [ "visibility" ])
      if (!defined(deps)) {
        deps = []
      }

      deps += [
        # Give tests the default manifest on Windows (a no-op elsewhere).
        "//build/win:default_exe_manifest",
      ]

      write_runtime_deps = _runtime_deps_file
      deps += [ ":$_gen_runner_target" ]

      if (!defined(data_deps)) {
        data_deps = []
      }

      data_deps += [ "//testing:test_scripts_shared" ]

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }
  } else {
    # This is a catch-all clause for NaCl toolchains and other random
    # configurations that might define tests; test() in these configs
    # will just define the underlying executables.
    assert(!defined(invoker.use_xvfb) || !invoker.use_xvfb,
           "use_xvfb should not be defined for a non-linux configuration")
    mixed_test(target_name) {
      target_type = "executable"
      forward_variables_from(invoker, "*", TESTONLY_AND_VISIBILITY)
      forward_variables_from(invoker, [ "visibility" ])
      if (!defined(deps)) {
        deps = []
      }

      if (!defined(data_deps)) {
        data_deps = []
      }

      data_deps += [ "//testing:test_scripts_shared" ]

      if (use_rts) {
        data_deps += [ ":${invoker.target_name}__rts_filters" ]
      }
    }
  }
}

# Defines a type of test that invokes a script to run, rather than
# invoking an executable.
#
# The script must implement the
# [test executable API](//docs/testing/test_executable_api.md).
#
# The template must be passed the `script` parameter, which specifies
# the path to the script to run. It may optionally be passed a
# `script_args` parameter, which can be used to include a list of
# args to be specified by default. The template will produce
# a `$root_build_dir/run_$target_name` wrapper and write the runtime_deps
# for the target to $root_build_dir/${target_name}.runtime_deps, as per
# the conventions listed in the
# [test wrapper API](//docs/testing/test_wrapper_api.md).
template("script_test") {
  if (use_rts) {
    action("${target_name}__rts_filters") {
      script = "//build/add_rts_filters.py"
      rts_file = "${root_build_dir}/gen/rts/${invoker.target_name}.filter"
      args = [ rebase_path(rts_file, root_build_dir) ]
      outputs = [ rts_file ]
    }
  }

  generate_wrapper(target_name) {
    testonly = true
    wrapper_script = "${root_build_dir}/bin/run_${target_name}"

    executable = "//testing/test_env.py"

    executable_args =
        [ "@WrappedPath(" + rebase_path(invoker.script, root_build_dir) + ")" ]
    if (defined(invoker.args)) {
      executable_args += invoker.args
    }

    data = [ invoker.script ]

    if (defined(invoker.data)) {
      data += invoker.data
    }
    if (tests_have_location_tags) {
      data += [ "//testing/location_tags.json" ]
    }

    data_deps = [ "//testing:test_scripts_shared" ]
    if (defined(invoker.data_deps)) {
      data_deps += invoker.data_deps
    }

    forward_variables_from(invoker,
                           [ "*" ],
                           TESTONLY_AND_VISIBILITY + [
                                 "data",
                                 "data_deps",
                                 "script",
                                 "script_args",
                               ])
    forward_variables_from(invoker, [ "visibility" ])

    write_runtime_deps = "${root_build_dir}/${target_name}.runtime_deps"

    if (use_rts) {
      data_deps += [ ":${invoker.target_name}__rts_filters" ]
    }
  }
}

# Test defaults.
set_defaults("test") {
  if (is_android) {
    configs = default_shared_library_configs
    configs -= [ "//build/config/android:hide_all_but_jni_onload" ]
    configs += [ "//build/config/android:hide_all_but_jni" ]
  } else {
    configs = default_executable_configs
    if (is_mac) {
      # TODO(lgrey): Maybe restore this.
      # Don't strip tests for visibility into test crashes/hangs.
      # https://bugs.chromium.org/p/chromium/issues/detail?id=1244047#c49
      configs -= [ "//build/config/mac:strip_all" ]
    }
  }
}