CacheTagTest.php

<?php

namespace Drupal\Tests\views\Functional\Plugin;

use Drupal\Core\Cache\Cache;
use Drupal\Tests\views\Functional\ViewTestBase;
use Drupal\views\ViewExecutable;
use Drupal\views\Views;

/**
 * Tests tag cache plugin.
 *
 * @group views
 * @see \Drupal\views\Plugin\views\cache\Tag
 */
class CacheTagTest extends ViewTestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_tag_cache',
    ];
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    protected static $modules = [
        'node',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The node storage.
     *
     * @var \Drupal\node\NodeStorage
     */
    protected $nodeStorage;
    
    /**
     * The node view builder.
     *
     * @var \Drupal\node\NodeViewBuilder
     */
    protected $nodeViewBuilder;
    
    /**
     * The user view builder.
     *
     * @var \Drupal\Core\Entity\EntityViewBuilder
     */
    protected $userViewBuilder;
    
    /**
     * An array of page nodes.
     *
     * @var \Drupal\node\NodeInterface[]
     */
    protected $pages;
    
    /**
     * An article node.
     *
     * @var \Drupal\node\NodeInterface
     */
    protected $article;
    
    /**
     * A test user.
     *
     * @var \Drupal\user\UserInterface
     */
    protected $user;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE, $modules = [
        'views_test_config',
    ]) : void {
        parent::setUp($import_test_views, $modules);
        $this->drupalCreateContentType([
            'type' => 'page',
            'name' => 'Basic page',
        ]);
        $this->drupalCreateContentType([
            'type' => 'article',
            'name' => 'Article',
        ]);
        $this->nodeStorage = $this->container
            ->get('entity_type.manager')
            ->getStorage('node');
        $this->nodeViewBuilder = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('node');
        $this->userViewBuilder = $this->container
            ->get('entity_type.manager')
            ->getViewBuilder('user');
        for ($i = 1; $i <= 5; $i++) {
            $this->pages[] = $this->drupalCreateNode([
                'title' => "Test {$i}",
                'type' => 'page',
            ]);
        }
        $this->article = $this->drupalCreateNode([
            'title' => "Test article",
            'type' => 'article',
        ]);
        $this->user = $this->drupalCreateUser();
        // Mark the current request safe, in order to make render cache working, see
        // \Drupal\Core\Render\RenderCache::get.
        \Drupal::request()->setMethod('GET');
    }
    
    /**
     * Gets the render cache for a given view.
     *
     * @param \Drupal\views\ViewExecutable $view
     *   The view.
     *
     * @return array|false
     *   The render cache result or FALSE if not existent.
     */
    protected function getRenderCache(ViewExecutable $view) {
        
        /** @var \Drupal\Core\Render\RenderCacheInterface $render_cache */
        $render_cache = \Drupal::service('render_cache');
        $view->element = [
            '#cache' => [],
        ];
        $build = $view->buildRenderable();
        $build['#cache']['contexts'] = Cache::mergeContexts($build['#cache']['contexts'], $this->container
            ->getParameter('renderer.config')['required_cache_contexts']);
        return $render_cache->get($build);
    }
    
    /**
     * Tests the tag cache plugin.
     */
    public function testTagCaching() {
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = \Drupal::service('renderer');
        $view = Views::getView('test_tag_cache');
        $build = $view->buildRenderable();
        $renderer->renderPlain($build);
        // Saving the view should invalidate the tags.
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found.');
        $this->assertNotEmpty($this->getRenderCache($view), 'Output cache found.');
        $view->storage
            ->save();
        $this->assertFalse($cache_plugin->cacheGet('results'), 'Results cache empty after the view is saved.');
        $this->assertFalse($this->getRenderCache($view), 'Output cache empty after the view is saved.');
        $view->destroy();
        $build = $view->buildRenderable();
        $renderer->renderPlain($build);
        // Test invalidating the nodes in this view invalidates the cache.
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found.');
        $this->assertNotEmpty($this->getRenderCache($view), 'Output cache found.');
        $this->nodeViewBuilder
            ->resetCache($this->pages);
        $this->assertFalse($cache_plugin->cacheGet('results'), 'Results cache empty after resetCache is called with pages.');
        $this->assertFalse($this->getRenderCache($view), 'Output cache empty after resetCache is called with pages.');
        $view->destroy();
        $build = $view->buildRenderable();
        $renderer->renderPlain($build);
        // Test saving a node in this view invalidates the cache.
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found.');
        $this->assertNotEmpty($this->getRenderCache($view), 'Output cache found.');
        $node = reset($this->pages);
        $node->save();
        $this->assertFalse($cache_plugin->cacheGet('results'), 'Results cache empty after a page node is saved.');
        $this->assertFalse($this->getRenderCache($view), 'Output cache empty after a page node is saved.');
        $view->destroy();
        $build = $view->buildRenderable();
        $renderer->renderPlain($build);
        // Test saving a node not in this view invalidates the cache too.
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found.');
        $this->assertNotEmpty($this->getRenderCache($view), 'Output cache found.');
        $this->article
            ->save();
        $this->assertFalse($cache_plugin->cacheGet('results'), 'Results cache empty after an article node is saved.');
        $this->assertFalse($this->getRenderCache($view), 'Output cache empty after an article node is saved.');
        $view->destroy();
        $build = $view->buildRenderable();
        $renderer->renderPlain($build);
        // Test that invalidating a tag for a user, does not invalidate the cache,
        // as the user entity type will not be contained in the views cache tags.
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found.');
        $this->assertNotEmpty($this->getRenderCache($view), 'Output cache found.');
        $this->userViewBuilder
            ->resetCache([
            $this->user,
        ]);
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found after a user is invalidated.');
        $this->assertNotEmpty($this->getRenderCache($view), 'Output cache found after a user is invalidated.');
        $view->destroy();
        // Invalidate the views cache tags in order to invalidate the render
        // caching.
        \Drupal::service('cache_tags.invalidator')->invalidateTags($view->storage
            ->getCacheTagsToInvalidate());
        $build = $view->buildRenderable();
        $renderer->renderPlain($build);
        // Test the cacheFlush method invalidates the cache.
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertTrue($cache_plugin->cacheGet('results'), 'Results cache found.');
        $this->assertNotEmpty($this->getRenderCache($view), 'Output cache found.');
        $cache_plugin->cacheFlush();
        $cache_plugin = $view->display_handler
            ->getPlugin('cache');
        $this->assertFalse($cache_plugin->cacheGet('results'), 'Results cache empty after the cacheFlush() method is called.');
        $this->assertFalse($this->getRenderCache($view), 'Output cache empty after the cacheFlush() method is called.');
    }

}