PathProcessorManager example

$this->aliasManager = $alias_manager;

    $this->requestStack = new RequestStack();
    $request = Request::create('/some/path');
    $this->requestStack->push($request);

    $this->context = new RequestContext();
    $this->context->fromRequestStack($this->requestStack);

    $processor = new AliasPathProcessor($this->aliasManager);
    $processor_manager = new PathProcessorManager();
    $processor_manager->addOutbound($processor, 1000);
    $this->processorManager = $processor_manager;

    $this->routeProcessorManager = $this->getMockBuilder('Drupal\Core\RouteProcessor\RouteProcessorManager')
      ->disableOriginalConstructor()
      ->getMock();

    $generator = new UrlGenerator($this->provider, $processor_manager, $this->routeProcessorManager, $this->requestStack, ['http', 'https']);
    $generator->setContext($this->context);
    $this->generator = $generator;
  }

  

// First, test the processor manager with the processors in the incorrect     // order. The alias processor will run before the language processor, meaning     // aliases will not be found.     $priorities = [
      1000 => $alias_processor,
      500 => $decode_processor,
      300 => $front_processor,
      200 => $language_processor,
    ];

    // Create the processor manager and add the processors.     $processor_manager = new PathProcessorManager();
    foreach ($priorities as $priority => $processor) {
      $processor_manager->addInbound($processor, $priority);
    }

    // Test resolving the French homepage using the incorrect processor order.     $test_path = '/fr';
    $request = Request::create($test_path);
    $processed = $processor_manager->processInbound($test_path, $request);
    $this->assertEquals('/', $processed, 'Processing in the incorrect order fails to resolve the system path from the empty path');

    // Test resolving an existing alias using the incorrect processor order.