class CacheTest

class CacheTest extends ViewsKernelTestBase {
    
    /**
     * Views used by this test.
     *
     * @var array
     */
    public static $testViews = [
        'test_view',
        'test_cache',
        'test_groupwise_term_ui',
        'test_display',
        'test_filter',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'taxonomy',
        'text',
        'user',
        'node',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp($import_test_views = TRUE) : void {
        parent::setUp($import_test_views);
        $this->installEntitySchema('node');
        $this->installEntitySchema('taxonomy_term');
        $this->installEntitySchema('user');
        // Setup the current time properly.
        \Drupal::request()->server
            ->set('REQUEST_TIME', \Drupal::time()->getCurrentTime());
    }
    
    /**
     * {@inheritdoc}
     */
    protected function viewsData() {
        $data = parent::viewsData();
        $data['views_test_data']['test_cache_context'] = [
            'real field' => 'name',
            'title' => 'Test cache context',
            'filter' => [
                'id' => 'views_test_test_cache_context',
            ],
        ];
        return $data;
    }
    
    /**
     * Tests time based caching.
     *
     * @see views_plugin_cache_time
     */
    public function testTimeResultCaching() : void {
        $view = Views::getView('test_cache');
        $view->setDisplay();
        $view->display_handler
            ->overrideOption('cache', [
            'type' => 'time',
            'options' => [
                'results_lifespan' => '3600',
                'output_lifespan' => '3600',
            ],
        ]);
        // Test the default (non-paged) display.
        $this->executeView($view);
        // Verify the result.
        $this->assertCount(5, $view->result, 'The number of returned rows match.');
        // Add another man to the beatles.
        $record = [
            'name' => 'Rod Davis',
            'age' => 29,
            'job' => 'Banjo',
        ];
        Database::getConnection()->insert('views_test_data')
            ->fields($record)
            ->execute();
        // The result should be the same as before, because of the caching. (Note
        // that views_test_data records don't have associated cache tags, and hence
        // the results cache items aren't invalidated.)
        $view->destroy();
        $this->executeView($view);
        // Verify the result.
        $this->assertCount(5, $view->result, 'The number of returned rows match.');
    }
    
    /**
     * Tests result caching with filters.
     *
     * @see views_plugin_cache_time
     */
    public function testTimeResultCachingWithFilter() : void {
        // Check that we can find the test filter plugin.
        $plugin = $this->container
            ->get('plugin.manager.views.filter')
            ->createInstance('test_filter');
        $this->assertInstanceOf(FilterPlugin::class, $plugin);
        $view = Views::getView('test_filter');
        $view->initDisplay();
        $view->display_handler
            ->overrideOption('cache', [
            'type' => 'time',
            'options' => [
                'results_lifespan' => '3600',
                'output_lifespan' => '3600',
            ],
        ]);
        // Change the filtering.
        $view->displayHandlers
            ->get('default')
            ->overrideOption('filters', [
            'test_filter' => [
                'id' => 'test_filter',
                'table' => 'views_test_data',
                'field' => 'name',
                'operator' => '=',
                'value' => 'John',
                'group' => 0,
            ],
        ]);
        $this->executeView($view);
        // Get the cache item.
        $cid1 = $view->display_handler
            ->getPlugin('cache')
            ->generateResultsKey();
        // Build the expected result.
        $dataset = [
            [
                'name' => 'John',
            ],
        ];
        // Verify the result.
        $this->assertCount(1, $view->result, 'The number of returned rows match.');
        $this->assertIdenticalResultSet($view, $dataset, [
            'views_test_data_name' => 'name',
        ]);
        $view->destroy();
        $view->initDisplay();
        // Change the filtering.
        $view->displayHandlers
            ->get('default')
            ->overrideOption('filters', [
            'test_filter' => [
                'id' => 'test_filter',
                'table' => 'views_test_data',
                'field' => 'name',
                'operator' => '=',
                'value' => 'Ringo',
                'group' => 0,
            ],
        ]);
        $this->executeView($view);
        // Get the cache item.
        $cid2 = $view->display_handler
            ->getPlugin('cache')
            ->generateResultsKey();
        $this->assertNotEquals($cid1, $cid2, "Results keys are different.");
        // Build the expected result.
        $dataset = [
            [
                'name' => 'Ringo',
            ],
        ];
        // Verify the result.
        $this->assertCount(1, $view->result, 'The number of returned rows match.');
        $this->assertIdenticalResultSet($view, $dataset, [
            'views_test_data_name' => 'name',
        ]);
    }
    
    /**
     * Tests result caching with a pager.
     */
    public function testTimeResultCachingWithPager() : void {
        $view = Views::getView('test_cache');
        $view->setDisplay();
        $view->display_handler
            ->overrideOption('cache', [
            'type' => 'time',
            'options' => [
                'results_lifespan' => '3600',
                'output_lifespan' => '3600',
            ],
        ]);
        $mapping = [
            'views_test_data_name' => 'name',
        ];
        $view->setDisplay('page_1');
        $view->setCurrentPage(0);
        $this->executeView($view);
        $this->assertIdenticalResultset($view, [
            [
                'name' => 'John',
            ],
            [
                'name' => 'George',
            ],
        ], $mapping);
        $view->destroy();
        $view->setDisplay('page_1');
        $view->setCurrentPage(1);
        $this->executeView($view);
        $this->assertIdenticalResultset($view, [
            [
                'name' => 'Ringo',
            ],
            [
                'name' => 'Paul',
            ],
        ], $mapping);
        $view->destroy();
        $view->setDisplay('page_1');
        $view->setCurrentPage(0);
        $this->executeView($view);
        $this->assertIdenticalResultset($view, [
            [
                'name' => 'John',
            ],
            [
                'name' => 'George',
            ],
        ], $mapping);
        $view->destroy();
        $view->setDisplay('page_1');
        $view->setCurrentPage(2);
        $this->executeView($view);
        $this->assertIdenticalResultset($view, [
            [
                'name' => 'Meredith',
            ],
        ], $mapping);
        $view->destroy();
    }
    
    /**
     * Tests no caching.
     *
     * @see views_plugin_cache_time
     */
    public function testNoneResultCaching() : void {
        // Create a basic result which just 2 results.
        $view = Views::getView('test_cache');
        $view->setDisplay();
        $view->display_handler
            ->overrideOption('cache', [
            'type' => 'none',
            'options' => [],
        ]);
        $this->executeView($view);
        // Verify the result.
        $this->assertCount(5, $view->result, 'The number of returned rows match.');
        // Add another man to the beatles.
        $record = [
            'name' => 'Rod Davis',
            'age' => 29,
            'job' => 'Banjo',
        ];
        Database::getConnection()->insert('views_test_data')
            ->fields($record)
            ->execute();
        // The Result changes, because the view is not cached.
        $view = Views::getView('test_cache');
        $view->setDisplay();
        $view->display_handler
            ->overrideOption('cache', [
            'type' => 'none',
            'options' => [],
        ]);
        $this->executeView($view);
        // Verify the result.
        $this->assertCount(6, $view->result, 'The number of returned rows match.');
    }
    
    /**
     * Tests css/js storage and restoring mechanism.
     */
    public function testHeaderStorage() : void {
        // Create a view with output caching enabled.
        // Some hook_views_pre_render in views_test_data.module adds the test css/js file.
        // so they should be added to the css/js storage.
        $view = Views::getView('test_view');
        $view->setDisplay();
        $view->storage
            ->set('id', 'test_cache_header_storage');
        $view->display_handler
            ->overrideOption('cache', [
            'type' => 'time',
            'options' => [
                'output_lifespan' => '3600',
            ],
        ]);
        $output = $view->buildRenderable();
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = \Drupal::service('renderer');
        $renderer->executeInRenderContext(new RenderContext(), function () use (&$output, $renderer) {
            return $renderer->render($output);
        });
        unset($view->pre_render_called);
        $view->destroy();
        $view->setDisplay();
        $output = $view->buildRenderable();
        $renderer->executeInRenderContext(new RenderContext(), function () use (&$output, $renderer) {
            return $renderer->render($output);
        });
        $this->assertContains('views_test_data/test', $output['#attached']['library'], 'Make sure libraries are added for cached views.');
        $this->assertEquals([
            'foo' => 'bar',
        ], $output['#attached']['drupalSettings'], 'Make sure drupalSettings are added for cached views.');
        // Note: views_test_data_views_pre_render() adds some cache tags.
        $this->assertEquals([
            'config:views.view.test_cache_header_storage',
            'views_test_data:1',
        ], $output['#cache']['tags']);
        $this->assertEquals([
            'non-existing-placeholder-just-for-testing-purposes' => [
                '#lazy_builder' => [
                    'Drupal\\views_test_data\\Controller\\ViewsTestDataController::placeholderLazyBuilder',
                    [
                        'bar',
                    ],
                ],
            ],
        ], $output['#attached']['placeholders']);
        $this->assertArrayNotHasKey('pre_render_called', $view->build_info, 'Make sure hook_views_pre_render is not called for the cached view.');
    }
    
    /**
     * Tests that Subqueries are cached as expected.
     */
    public function testSubqueryStringCache() : void {
        // Execute the view.
        $view = Views::getView('test_groupwise_term_ui');
        $view->setDisplay();
        $this->executeView($view);
        // Request for the cache.
        $cid = 'views_relationship_groupwise_max:test_groupwise_term_ui:default:tid_representative';
        $cache = \Drupal::cache('data')->get($cid);
        $this->assertEquals($cid, $cache->cid, 'Subquery String cached as expected.');
    }
    
    /**
     * Tests the data contained in cached items.
     */
    public function testCacheData() : void {
        for ($i = 1; $i <= 5; $i++) {
            Node::create([
                'title' => $this->randomMachineName(8),
                'type' => 'page',
            ])
                ->save();
        }
        $view = Views::getView('test_display');
        $view->setDisplay();
        $view->display_handler
            ->overrideOption('cache', [
            'type' => 'time',
            'options' => [
                'results_lifespan' => '3600',
                'output_lifespan' => '3600',
            ],
        ]);
        $this->executeView($view);
        // Get the cache item.
        $cid = $view->display_handler
            ->getPlugin('cache')
            ->generateResultsKey();
        $cache = \Drupal::cache('data')->get($cid);
        // Assert there are results, empty results would mean this test case would
        // pass otherwise.
        $this->assertGreaterThan(0, count($cache->data['result']), 'Results saved in cached data.');
        // Assert each row doesn't contain '_entity' or '_relationship_entities'
        // items.
        foreach ($cache->data['result'] as $row) {
            $this->assertNull($row->_entity, 'Cached row "_entity" property is NULL');
            $this->assertSame([], $row->_relationship_entities, 'Cached row "_relationship_entities" property is empty');
        }
    }
    
    /**
     * Tests the cache context integration for views result cache.
     */
    public function testCacheContextIntegration() : void {
        $view = Views::getView('test_cache');
        $view->setDisplay('page_2');
        \Drupal::state()->set('views_test_cache_context', 'George');
        $this->executeView($view);
        $map = [
            'views_test_data_name' => 'name',
        ];
        $this->assertIdenticalResultset($view, [
            [
                'name' => 'George',
            ],
        ], $map);
        // Update the entry in the DB to ensure that result caching works.
        \Drupal::database()->update('views_test_data')
            ->condition('name', 'George')
            ->fields([
            'name' => 'notGeorge',
        ])
            ->execute();
        $view = Views::getView('test_cache');
        $view->setDisplay('page_2');
        $this->executeView($view);
        $this->assertIdenticalResultset($view, [
            [
                'name' => 'George',
            ],
        ], $map);
        // Now change the cache context value, a different query should be executed.
        $view = Views::getView('test_cache');
        $view->setDisplay('page_2');
        \Drupal::state()->set('views_test_cache_context', 'Paul');
        $this->executeView($view);
        $this->assertIdenticalResultset($view, [
            [
                'name' => 'Paul',
            ],
        ], $map);
    }
    
    /**
     * Tests that cacheability metadata is carried over from argument defaults.
     */
    public function testArgumentDefaultCache() : void {
        $view = Views::getView('test_view');
        // Add a new argument and set the test plugin for the argument_default.
        $options = [
            'default_argument_type' => 'argument_default_test',
            'default_argument_options' => [
                'value' => 'John',
            ],
            'default_action' => 'default',
        ];
        $view->addHandler('default', 'argument', 'views_test_data', 'name', $options);
        $view->initHandlers();
        $output = $view->preview();
        
        /** @var \Drupal\Core\Render\RendererInterface $renderer */
        $renderer = \Drupal::service('renderer');
        $renderer->renderInIsolation($output);
        $this->assertEquals([
            'config:views.view.test_view',
            'example_tag',
        ], $output['#cache']['tags']);
    }

}