tools/engine_tool/test/gn_utils_test.dart

// Copyright 2013 The Flutter 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 'dart:io' as io;

import 'package:engine_repo_tools/engine_repo_tools.dart';
import 'package:engine_tool/src/environment.dart';
import 'package:engine_tool/src/gn_utils.dart';
import 'package:litetest/litetest.dart';

import 'utils.dart';

void main() {
  final Engine engine;
  try {
    engine = Engine.findWithin();
  } catch (e) {
    io.stderr.writeln(e);
    io.exitCode = 1;
    return;
  }

  final List<CannedProcess> cannedProcesses = <CannedProcess>[
    CannedProcess((List<String> command) => command.contains('--as=label'),
        stdout: '''
//flutter/display_list:display_list_unittests
//flutter/flow:flow_unittests
//flutter/fml:fml_arc_unittests
'''),
    CannedProcess((List<String> command) => command.contains('--as=output'),
        stdout: '''
display_list_unittests
flow_unittests
fml_arc_unittests
''')
  ];

  test('find test targets', () async {
    final TestEnvironment testEnvironment =
        TestEnvironment(engine, cannedProcesses: cannedProcesses);
    final Environment env = testEnvironment.environment;
    final Map<String, TestTarget> testTargets =
        await findTestTargets(env, engine.outDir);
    expect(testTargets.length, equals(3));
    expect(testTargets['//flutter/display_list:display_list_unittests'],
        notEquals(null));
    expect(
        testTargets['//flutter/display_list:display_list_unittests']!
            .executable
            .path,
        endsWith('display_list_unittests'));
  });

  test('process queue failure', () async {
    final TestEnvironment testEnvironment =
        TestEnvironment(engine, cannedProcesses: cannedProcesses);
    final Environment env = testEnvironment.environment;
    final Map<String, TestTarget> testTargets =
        await findTestTargets(env, engine.outDir);
    expect(selectTargets(<String>['//...'], testTargets).length, equals(3));
    expect(
        selectTargets(<String>['//flutter/display_list'], testTargets).length,
        equals(0));
    expect(
        selectTargets(<String>['//flutter/display_list/...'], testTargets)
            .length,
        equals(1));
    expect(
        selectTargets(<String>['//flutter/display_list:display_list_unittests'],
                testTargets)
            .length,
        equals(1));
  });
}