function RendererPlaceholdersTest::testCacheableParent

@covers ::render @covers ::doRender @covers \Drupal\Core\Render\RenderCache::get @covers \Drupal\Core\Render\RenderCache::set @covers \Drupal\Core\Render\RenderCache::createCacheID

@dataProvider providerPlaceholders

File

core/tests/Drupal/Tests/Core/Render/RendererPlaceholdersTest.php, line 617

Class

RendererPlaceholdersTest

@coversDefaultClass \Drupal\Core\Render\Renderer @covers \Drupal\Core\Render\RenderCache @covers \Drupal\Core\Render\PlaceholderingRenderCache @group Render

Namespace

Code

public function testCacheableParent($test_element, $args, array $expected_placeholder_render_array, $placeholder_cid_parts, array $bubbled_cache_contexts, array $bubbled_cache_tags, array $placeholder_expected_render_cache_array) {
    $element = $test_element;
    $this->setupMemoryCache();
    $this->setUpRequest('GET');
    $token = Crypt::hashBase64(serialize($expected_placeholder_render_array));
    $placeholder_callback = $expected_placeholder_render_array['#lazy_builder'][0];
    $expected_placeholder_markup = '<drupal-render-placeholder callback="' . $placeholder_callback . '" arguments="0=' . $args[0] . '" token="' . $token . '"></drupal-render-placeholder>';
    $this->assertSame($expected_placeholder_markup, Html::normalize($expected_placeholder_markup), 'Placeholder unaltered by Html::normalize() which is used by FilterHtmlCorrector.');
    // GET request: #cache enabled, cache miss.
    $element['#cache'] = [
        'keys' => [
            'placeholder_test_GET',
        ],
    ];
    $element['#prefix'] = '<p>#cache enabled, GET</p>';
    $output = $this->renderer
        ->renderRoot($element);
    $this->assertSame('<p>#cache enabled, GET</p><p>This is a rendered placeholder!</p>', (string) $output, 'Output is overridden.');
    $this->assertTrue(isset($element['#printed']), 'No cache hit');
    $this->assertSame('<p>#cache enabled, GET</p><p>This is a rendered placeholder!</p>', (string) $element['#markup'], '#markup is overridden.');
    $expected_js_settings = [
        'foo' => 'bar',
        'dynamic_animal' => $args[0],
    ];
    $this->assertSame($element['#attached']['drupalSettings'], $expected_js_settings, '#attached is modified; both the original JavaScript setting and the one added by the placeholder #lazy_builder callback exist.');
    $this->assertPlaceholderRenderCache($placeholder_cid_parts, $bubbled_cache_contexts, $placeholder_expected_render_cache_array);
    // GET request: validate cached data.
    $cached = $this->memoryCache
        ->get('placeholder_test_GET');
    // There are three edge cases, where the shape of the render cache item for
    // the parent (with CID 'placeholder_test_GET') is vastly different. These
    // are the cases where:
    // - the placeholder is uncacheable (because it has no #cache[keys]), and;
    // - cacheability metadata that meets auto_placeholder_conditions is bubbled
    $has_uncacheable_lazy_builder = !isset($test_element['placeholder']['#cache']['keys']) && isset($test_element['placeholder']['#lazy_builder']);
    // Edge cases: always where both bubbling of an auto-placeholdering
    // condition happens from within a #lazy_builder that is uncacheable.
    // - uncacheable + A5 (cache max-age)
    // @todo in https://www.drupal.org/node/2559847
    // - uncacheable + A6 (cache context)
    $edge_case_a6_uncacheable = $has_uncacheable_lazy_builder && $test_element['placeholder']['#lazy_builder'][0] === 'Drupal\\Tests\\Core\\Render\\PlaceholdersTest::callbackPerUser';
    // - uncacheable + A7 (cache tag)
    $edge_case_a7_uncacheable = $has_uncacheable_lazy_builder && $test_element['placeholder']['#lazy_builder'][0] === 'Drupal\\Tests\\Core\\Render\\PlaceholdersTest::callbackTagCurrentTemperature';
    // The redirect-cacheable edge case: a high-cardinality cache context is
    // bubbled from a #lazy_builder callback for an uncacheable placeholder. The
    // element containing the uncacheable placeholder has cache keys set, and
    // due to the bubbled cache contexts it creates a cache redirect.
    if ($edge_case_a6_uncacheable) {
        $cached_element = $cached->data;
        $expected_redirect = [
            '#cache_redirect' => TRUE,
            '#cache' => [
                'keys' => [
                    'placeholder_test_GET',
                ],
                'contexts' => [
                    'user',
                ],
                'tags' => [],
                'max-age' => Cache::PERMANENT,
                'bin' => 'render',
            ],
        ];
        $this->assertEquals($expected_redirect, $cached_element);
        // Follow the redirect.
        $cached_element = $this->memoryCache
            ->get('placeholder_test_GET:' . implode(':', $bubbled_cache_contexts))->data;
        $expected_element = [
            '#markup' => '<p>#cache enabled, GET</p><p>This is a rendered placeholder!</p>',
            '#attached' => [
                'drupalSettings' => [
                    'foo' => 'bar',
                    'dynamic_animal' => $args[0],
                ],
            ],
            '#cache' => [
                'contexts' => $bubbled_cache_contexts,
                'tags' => [],
                'max-age' => Cache::PERMANENT,
            ],
        ];
        $this->assertEquals($expected_element, $cached_element, 'The parent is render cached with a redirect in ase a cache context is bubbled from an uncacheable child (no #cache[keys]) with a #lazy_builder.');
    }
    elseif ($edge_case_a7_uncacheable) {
        $cached_element = $cached->data;
        $expected_element = [
            '#markup' => '<p>#cache enabled, GET</p><p>This is a rendered placeholder!</p>',
            '#attached' => [
                'drupalSettings' => [
                    'foo' => 'bar',
                    'dynamic_animal' => $args[0],
                ],
            ],
            '#cache' => [
                'contexts' => [],
                'tags' => $bubbled_cache_tags,
                'max-age' => Cache::PERMANENT,
            ],
        ];
        $this->assertEquals($expected_element, $cached_element, 'The correct data is cached: the stored #markup and #attached properties are not affected by placeholder #lazy_builder callbacks.');
    }
    else {
        $cached_element = $cached->data;
        $expected_element = [
            '#markup' => '<p>#cache enabled, GET</p>' . $expected_placeholder_markup,
            '#attached' => [
                'drupalSettings' => [
                    'foo' => 'bar',
                ],
                'placeholders' => [
                    $expected_placeholder_markup => [
                        '#lazy_builder' => [
                            'Drupal\\Tests\\Core\\Render\\PlaceholdersTest::callback',
                            $args,
                        ],
                    ],
                ],
            ],
            '#cache' => [
                'contexts' => [],
                'tags' => $bubbled_cache_tags,
                'max-age' => Cache::PERMANENT,
            ],
        ];
        $expected_element['#attached']['placeholders'][$expected_placeholder_markup] = $expected_placeholder_render_array;
        $this->assertEquals($expected_element, $cached_element, 'The correct data is cached: the stored #markup and #attached properties are not affected by placeholder #lazy_builder callbacks.');
    }
    // GET request: #cache enabled, cache hit.
    $element = $test_element;
    $element['#cache'] = [
        'keys' => [
            'placeholder_test_GET',
        ],
    ];
    $element['#prefix'] = '<p>#cache enabled, GET</p>';
    $output = $this->renderer
        ->renderRoot($element);
    $this->assertSame('<p>#cache enabled, GET</p><p>This is a rendered placeholder!</p>', (string) $output, 'Output is overridden.');
    $this->assertFalse(isset($element['#printed']), 'Cache hit');
    $this->assertSame('<p>#cache enabled, GET</p><p>This is a rendered placeholder!</p>', (string) $element['#markup'], '#markup is overridden.');
    $expected_js_settings = [
        'foo' => 'bar',
        'dynamic_animal' => $args[0],
    ];
    $this->assertSame($element['#attached']['drupalSettings'], $expected_js_settings, '#attached is modified; both the original JavaScript setting and the one added by the placeholder #lazy_builder callback exist.');
}