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);
    }

}