entity_access_test.php

<?php

namespace Drupal\Core\Routing;

use Drupal\Core\Access\AccessCheckInterface;
use Drupal\Core\Entity\EntityInterface;
use Symfony\Component\Routing\Route;
use Symfony\Component\HttpFoundation\Request;
use Drupal\Tests\UnitTestCase;



class EntityAccessCheck implements AccessCheckInterface {

  /**
   * Implements \Drupal\Core\Access\AccessCheckInterface::applies().
   */
  public function applies(Route $route) {
    return array_key_exists('_access_entity', $route->getRequirements());
  }

  /**
   * Implements \Drupal\Core\Access\AccessCheckInterface::access().
   *
   * The value of the '_access_entity' key must be in the pattern
   * 'slug.operation.' The slug corresponds to the named param {slug}.
   * This will check a node for 'update' access:
   * @code
   * pattern: '/foo/{node}/bar'
   * requirements:
   *   _access_entity: 'node.update'
   * @endcode
   */
  public function access(Route $route, Request $request) {
    $requirements = $route->getRequirements();
    // Split up the slug and the operation.
    list($slug, $operation) = explode('.', $requirements['_access_entity']);
    // If this slug is in the request, and it is an entity, check its access.
    if ($request->attributes->has($slug)) {
      $entity = $request->attributes->get($slug);
      if ($entity instanceof EntityInterface) {
        return $entity->access($operation);
      }
    }
  }
}

class EntityAccessCheckTest extends UnitTestCase {
  function testApplies() {
    $e = new EntityAccessCheck();
    $route = $this->getMockBuilder('Symfony\Component\Routing\Route')
                  ->disableOriginalConstructor()
                  ->getMock();
    $route->expects($this->any())
         ->method('getRequirements')
         ->will($this->returnValue(array('_access_entity' => '')));
    $res = $e->applies($route);
    $this->assertEquals(TRUE, $res);

    $route = $this->getMockBuilder('Symfony\Component\Routing\Route')
                  ->disableOriginalConstructor()
                  ->getMock();
    $route->expects($this->any())
         ->method('getRequirements')
         ->will($this->returnValue(array()));
    $res = $e->applies($route);
    $this->assertEquals(FALSE, $res);

  }
  function testAccess() {
  }
}