# Copyright 2020 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("fuchsia_test_package.gni")
import("fuchsia_unittest_component.gni")

# Defines a package that contains a component that launches a test.
# See: https://fuchsia.dev/fuchsia-src/development/components/build
#
# This template is a useful shortcut for defining classic unit tests for target
# devices.
# Pure unit tests don't require any special capabilities, so their component
# manifest can be generated by the template if a manifest is not specified.
#
# Example:
# ```
# executable("rot13_encoder_decoder_test") {
#   sources = [ "rot13_encoder_decoder_test.cc" ]
#   testonly = true
# }
#
# fuchsia_unittest_package("rot13-test") {
#   deps = [ ":rot13_encoder_decoder_test" ]
# }
# ```
#
# The above will generate a manifest and create a test with the launch URL:
# fuchsia-pkg://fuchsia.com/rot13-test#meta/rot13-test.cmx
#
# Parameters
#
#   package_name (optional)
#     The name of the package.
#     Type: string
#     Default: target_name
#
#   component_name (optional)
#     The name of the component.
#     Type: string
#     Default: package_name if defined, else target_name
#
#   manifest (optional)
#     Specify a component manifest for the test.
#     If a manifest is not specified, a trivial manifest will be generated.
#     The generated manifest requests no special capabilities, which is good
#     enough for "pure" unit tests.
#     To view the generated manifest, see:
#     `fx gn outputs out/default path/to/your:<target_name>_component_generated_manifest`
#     Type: path
#
#   v2 (optional)
#     If specified and set to false, will generate a CFv1 (.cmx) manifest.
#     If `manifest` is specified then this is ignored.
#     Type: boolean
#
#   restricted_features (optional)
#     The set of restricted CML features to allow. Only applicable to v2 components.
#     The set of features is allowlisted here: //tools/cmc/build/restricted_features/BUILD.gn
#     where each feature name is represented by a group of the same name.
#     Type: list of strings
#     Default: []
#
#   test_specs (optional)
#     Additional test specifications to apply to the test defined above.
#     See `test_spec.gni`.
#     Type: scope
#
#   deprecated_legacy_test_execution (optional)
#     If set for a v2 test, the test will be forced to use ELF runner,
#     which sacrifices isolation for higher performance.
#     Type: boolean
#
#   deps
#   visibility
template("fuchsia_unittest_package") {
  component_target = "${target_name}_component"
  fuchsia_unittest_component(component_target) {
    forward_variables_from(invoker,
                           [
                             "component_name",
                             "deps",
                             "manifest",
                             "restricted_features",
                             "deprecated_legacy_test_execution",
                             "v2",
                           ])
    if (!defined(component_name)) {
      if (defined(invoker.package_name)) {
        component_name = invoker.package_name
      } else {
        component_name = invoker.target_name
      }
    }
    visibility = [ ":*" ]
  }

  fuchsia_test_package(target_name) {
    forward_variables_from(invoker,
                           [
                             "package_name",
                             "test_specs",
                             "visibility",
                           ])
    test_components = [ ":$component_target" ]
  }
}