function AccessPolicyProcessorInFibersTest::testAccessPolicyProcessorInFibers

Tests the behavior of the access policy processor running inside fibers.

File

core/tests/Drupal/KernelTests/Core/Session/AccessPolicyProcessorInFibersTest.php, line 36

Class

AccessPolicyProcessorInFibersTest

Tests the behavior of the access policy processor running inside fibers.

Namespace

Code

public function testAccessPolicyProcessorInFibers() : void {
  // Create a role and then empty the static cache, so that it will need to be
  // loaded from storage.
  $this->createRole([
    'administer modules',
  ], 'test_role');
  \Drupal::entityTypeManager()->getStorage('user_role')
    ->resetCache();
  // Create a render array with two elements that have lazy builders. The
  // first lazy builder prints the ID of the current user. The second lazy
  // builder checks the permissions of a different user, which results in a
  // call to AccountPolicyProcessor::processAccessPolicies(). In that method,
  // if the current user ID is different from the ID of the account being
  // processed, the current user is temporarily switched to that account.
  // This is done in order to make sure the correct user's data is used when
  // saving to the variation cache.
  //
  // Note that for the purposes of this test, the lazy builder that accesses
  // the current user ID has to come before the other lazy builder in the
  // render array. Ordering the array this way results in the second lazy
  // builder starting to run before the first. This happens because as render
  // contexts are updated as they are bubbled, the BubbleableMetadata object
  // associated with the render element merges its attached placeholder to the
  // front of the list to be processed.
  $build = [
    [
      '#lazy_builder' => [
        self::class . '::lazyBuilderCheckCurrentUserCallback',
        [],
      ],
      '#create_placeholder' => TRUE,
    ],
    [
      // Add a space between placeholders.
'#markup' => ' ',
    ],
    [
      '#lazy_builder' => [
        self::class . '::lazyBuilderCheckAccessCallback',
        [],
      ],
      '#create_placeholder' => TRUE,
    ],
  ];
  $user2 = new UserSession([
    'uid' => 2,
  ]);
  $this->setCurrentUser($user2);
  $expected = 'The current user id is 2. User 3 can administer modules.';
  $output = (string) \Drupal::service(RendererInterface::class)->renderRoot($build);
  $this->assertSame($expected, $output);
}