class LocalTaskIntegrationTestBase

abstract class LocalTaskIntegrationTestBase extends UnitTestCase {
  
  /**
   * A list of module directories used for YAML searching.
   *
   * @var array
   */
  protected $directoryList;
  
  /**
   * The module handler.
   *
   * @var \Drupal\Core\Extension\ModuleHandlerInterface|\PHPUnit\Framework\MockObject\MockObject
   */
  protected $moduleHandler;
  
  /**
   * The container.
   *
   * @var \Symfony\Component\DependencyInjection\ContainerBuilder
   */
  protected $container;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $container = new ContainerBuilder();
    $config_factory = $this->getConfigFactoryStub([]);
    $container->set('config.factory', $config_factory);
    $container->setParameter('app.root', $this->root);
    \Drupal::setContainer($container);
    $this->container = $container;
  }
  
  /**
   * Sets up the local task manager for the test.
   */
  protected function getLocalTaskManager(array $module_dirs, string $route_name, array $route_params) : LocalTaskManager {
    $module_handler = $this->createStub(ModuleHandlerInterface::class);
    // Set all the modules as being existent.
    $module_handler->method('moduleExists')
      ->willReturnCallback(function ($module) use ($module_dirs) : bool {
      return isset($module_dirs[$module]);
    });
    $language = $this->createStub(LanguageInterface::class);
    $language->method('getId')
      ->willReturn('en');
    $language_manager = $this->createStub(LanguageManagerInterface::class);
    $language_manager->method('getCurrentLanguage')
      ->willReturn($language);
    $manager = new LocalTaskManager($this->createStub(ArgumentResolverInterface::class), new RequestStack(), $this->createStub(RouteMatchInterface::class), $this->createStub(RouteProviderInterface::class), $module_handler, $this->createStub(CacheBackendInterface::class), $language_manager, $this->createStub(AccessManagerInterface::class), $this->createStub(AccountInterface::class));
    $pluginDiscovery = new YamlDiscovery('links.task', $module_dirs);
    $pluginDiscovery = new ContainerDerivativeDiscoveryDecorator($pluginDiscovery);
    $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'discovery');
    $property->setValue($manager, $pluginDiscovery);
    $method = new \ReflectionMethod('Drupal\\Core\\Menu\\LocalTaskManager', 'alterInfo');
    $method->invoke($manager, 'local_tasks');
    $factory = $this->createStub(FactoryInterface::class);
    $factory->method('createInstance')
      ->willReturn($this->createStub('Drupal\\Core\\Menu\\LocalTaskInterface'));
    $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'factory');
    $property->setValue($manager, $factory);
    return $manager;
  }
  
  /**
   * Tests integration for local tasks.
   *
   * @param string $route_name
   *   Route name to base task building on.
   * @param array $expected_tasks
   *   A list of tasks groups by level expected at the given route.
   * @param array $route_params
   *   (optional) A list of route parameters used to resolve tasks.
   */
  protected function assertLocalTasks(string $route_name, array $expected_tasks, array $route_params = []) : void {
    $directory_list = [];
    foreach ($this->directoryList as $key => $value) {
      $directory_list[$key] = $this->root . '/' . $value;
    }
    $manager = $this->getLocalTaskManager($directory_list, $route_name, $route_params);
    $tmp_tasks = $manager->getLocalTasksForRoute($route_name);
    // At this point we're just testing existence so pull out keys and then
    // compare.
    //
    // Deeper testing would require a functioning factory which because we are
    // using the DefaultPluginManager base means we get into dependency soup
    // because its factories create method and pulling services off the \Drupal
    // container.
    $tasks = [];
    foreach ($tmp_tasks as $level => $level_tasks) {
      $tasks[$level] = array_keys($level_tasks);
    }
    $this->assertEquals($expected_tasks, $tasks);
  }

}