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() {
        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($module_dirs, $route_name, $route_params) {
        $manager = $this->getMockBuilder('Drupal\\Core\\Menu\\LocalTaskManager')
            ->disableOriginalConstructor()
            ->onlyMethods([])
            ->getMock();
        $argumentResolver = $this->createMock('Symfony\\Component\\HttpKernel\\Controller\\ArgumentResolverInterface');
        $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'argumentResolver');
        $property->setAccessible(TRUE);
        $property->setValue($manager, $argumentResolver);
        // todo mock a request with a route.
        $request_stack = new RequestStack();
        $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'requestStack');
        $property->setAccessible(TRUE);
        $property->setValue($manager, $request_stack);
        $accessManager = $this->createMock('Drupal\\Core\\Access\\AccessManagerInterface');
        $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'accessManager');
        $property->setAccessible(TRUE);
        $property->setValue($manager, $accessManager);
        $route_provider = $this->createMock('Drupal\\Core\\Routing\\RouteProviderInterface');
        $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'routeProvider');
        $property->setAccessible(TRUE);
        $property->setValue($manager, $route_provider);
        $module_handler = $this->getMockBuilder('Drupal\\Core\\Extension\\ModuleHandlerInterface')
            ->disableOriginalConstructor()
            ->getMock();
        $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'moduleHandler');
        $property->setAccessible(TRUE);
        $property->setValue($manager, $module_handler);
        // Set all the modules as being existent.
        $module_handler->expects($this->any())
            ->method('moduleExists')
            ->willReturnCallback(function ($module) use ($module_dirs) {
            return isset($module_dirs[$module]);
        });
        $pluginDiscovery = new YamlDiscovery('links.task', $module_dirs);
        $pluginDiscovery = new ContainerDerivativeDiscoveryDecorator($pluginDiscovery);
        $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'discovery');
        $property->setAccessible(TRUE);
        $property->setValue($manager, $pluginDiscovery);
        $method = new \ReflectionMethod('Drupal\\Core\\Menu\\LocalTaskManager', 'alterInfo');
        $method->setAccessible(TRUE);
        $method->invoke($manager, 'local_tasks');
        $plugin_stub = $this->createMock('Drupal\\Core\\Menu\\LocalTaskInterface');
        $factory = $this->createMock('Drupal\\Component\\Plugin\\Factory\\FactoryInterface');
        $factory->expects($this->any())
            ->method('createInstance')
            ->willReturn($plugin_stub);
        $property = new \ReflectionProperty('Drupal\\Core\\Menu\\LocalTaskManager', 'factory');
        $property->setAccessible(TRUE);
        $property->setValue($manager, $factory);
        $cache_backend = $this->createMock('Drupal\\Core\\Cache\\CacheBackendInterface');
        $manager->setCacheBackend($cache_backend, 'local_task.en', [
            'local_task',
        ]);
        return $manager;
    }
    
    /**
     * Tests integration for local tasks.
     *
     * @param $route_name
     *   Route name to base task building on.
     * @param $expected_tasks
     *   A list of tasks groups by level expected at the given route
     * @param array $route_params
     *   (optional) A list of route parameters used to resolve tasks.
     */
    protected function assertLocalTasks($route_name, $expected_tasks, $route_params = []) {
        $directory_list = [];
        foreach ($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);
    }

}