class SearchPageCacheTagsTest

class SearchPageCacheTagsTest extends BrowserTestBase {
  use AssertPageCacheContextsAndTagsTrait;
  use FieldUiTestTrait;
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'node',
    'search',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * A user with permission to search content.
   *
   * @var \Drupal\user\UserInterface
   */
  protected $searchingUser;
  
  /**
   * A node that is indexed by the search module.
   *
   * @var \Drupal\node\NodeInterface
   */
  protected $node;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    $this->drupalCreateContentType([
      'type' => 'page',
      'name' => 'Basic page',
    ]);
    // Create user.
    $this->searchingUser = $this->drupalCreateUser([
      'search content',
      'access user profiles',
    ]);
    // Create a node and update the search index.
    $this->node = $this->drupalCreateNode([
      'title' => 'bike shed shop',
    ]);
    $this->node
      ->setOwner($this->searchingUser);
    $this->node
      ->save();
    $this->container
      ->get('plugin.manager.search')
      ->createInstance('node_search')
      ->updateIndex();
  }
  
  /**
   * Tests the presence of the expected cache tag in various situations.
   */
  public function testSearchText() : void {
    $this->drupalLogin($this->searchingUser);
    // Initial page for searching nodes.
    $this->drupalGet('search/node');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'config:search.page.node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'search_index:node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'node_list');
    // Node search results.
    $edit = [];
    $edit['keys'] = 'bike shed';
    $this->drupalGet('search/node');
    $this->submitForm($edit, 'Search');
    $this->assertSession()
      ->pageTextContains('bike shed shop');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'config:search.page.node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'search_index');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'search_index:node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'node:1');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'user:2');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'rendered');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'http_response');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'node_list');
    // Updating a node should invalidate the search plugin's index cache tag.
    $this->node->title = 'bike shop';
    $this->node
      ->save();
    $this->drupalGet('search/node');
    $this->submitForm($edit, 'Search');
    $this->assertSession()
      ->pageTextContains('bike shop');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'config:search.page.node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'search_index');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'search_index:node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'node:1');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'user:2');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'rendered');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'http_response');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'node_list');
    // Deleting a node should invalidate the search plugin's index cache tag.
    $this->node
      ->delete();
    $this->drupalGet('search/node');
    $this->submitForm($edit, 'Search');
    $this->assertSession()
      ->pageTextContains('Your search yielded no results.');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'config:search.page.node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'search_index');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'search_index:node_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'node_list');
    // Initial page for searching users.
    $this->drupalGet('search/user');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'config:search.page.user_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'user_list');
    $this->assertSession()
      ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'search_index');
    $this->assertSession()
      ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'search_index:user_search');
    // User search results.
    $edit['keys'] = $this->searchingUser
      ->getAccountName();
    $this->drupalGet('search/user');
    $this->submitForm($edit, 'Search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'config:search.page.user_search');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'user_list');
    $this->assertSession()
      ->responseHeaderContains('X-Drupal-Cache-Tags', 'user:2');
    $this->assertSession()
      ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'search_index');
    $this->assertSession()
      ->responseHeaderNotContains('X-Drupal-Cache-Tags', 'search_index:user_search');
  }
  
  /**
   * Tests the presence of expected cache tags with referenced entities.
   */
  public function testSearchTagsBubbling() : void {
    // Install field UI module.
    $this->container
      ->get('module_installer')
      ->install([
      'field_ui',
    ]);
    $this->resetAll();
    // Creates a new content type that will have an entity reference.
    $type_name = 'entity_reference_test';
    $type = $this->drupalCreateContentType([
      'name' => $type_name,
      'type' => $type_name,
    ]);
    $bundle_path = 'admin/structure/types/manage/' . $type->id();
    // Create test user.
    $admin_user = $this->drupalCreateUser([
      'access content',
      'create ' . $type_name . ' content',
      'administer node fields',
      'administer node display',
    ]);
    $this->drupalLogin($admin_user);
    $this->fieldUIAddNewField($bundle_path, 'test__ref', 'Test label', 'entity_reference', [], [
      'settings[handler_settings][target_bundles][page]' => TRUE,
    ]);
    // Create a new node of our newly created node type and fill in the entity
    // reference field.
    $edit = [
      'title[0][value]' => 'Llama shop',
      'field_test__ref[0][target_id]' => $this->node
        ->getTitle(),
    ];
    $this->drupalGet('node/add/' . $type->id());
    $this->submitForm($edit, 'Save');
    // Test that the value of the entity reference field is shown.
    $this->drupalGet('node/2');
    $this->assertSession()
      ->pageTextContains('bike shed shop');
    // Refresh the search index.
    $this->container
      ->get('plugin.manager.search')
      ->createInstance('node_search')
      ->updateIndex();
    // Log in with searching user again.
    $this->drupalLogin($this->searchingUser);
    // Default search cache tags.
    $default_search_tags = [
      'config:search.page.node_search',
      'search_index',
      'search_index:node_search',
      'http_response',
      'CACHE_MISS_IF_UNCACHEABLE_HTTP_METHOD:form',
      'rendered',
      'node_list',
    ];
    // Node search results for shop, should return node:1 (bike shed shop) and
    // node:2 (Llama shop). The related authors cache tags should be visible as
    // well.
    $edit = [];
    $edit['keys'] = 'shop';
    $this->drupalGet('search/node');
    $this->submitForm($edit, 'Search');
    $this->assertSession()
      ->pageTextContains('bike shed shop');
    $this->assertSession()
      ->pageTextContains('Llama shop');
    $expected_cache_tags = Cache::mergeTags($default_search_tags, [
      'node:1',
      'user:2',
      'node:2',
      'user:3',
      'node_view',
      'config:filter.format.plain_text',
    ]);
    $this->assertCacheTags($expected_cache_tags);
    // Only get the new node in the search results, should result in node:1,
    // node:2 and user:3 as cache tags even though only node:1 is shown. This is
    // because node:2 is reference in node:1 as an entity reference.
    $edit = [];
    $edit['keys'] = 'Llama';
    $this->drupalGet('search/node');
    $this->submitForm($edit, 'Search');
    $this->assertSession()
      ->pageTextContains('Llama shop');
    $expected_cache_tags = Cache::mergeTags($default_search_tags, [
      'node:1',
      'node:2',
      'user:3',
      'node_view',
    ]);
    $this->assertCacheTags($expected_cache_tags);
  }

}