function RendererPlaceholdersTest::testRecursivePlaceholder

Tests a placeholder that adds another placeholder.

E.g. when rendering a node in a placeholder the rendering of that node needs a placeholder of its own to be executed (to render the node links).

@covers ::render @covers ::doRender @covers ::replacePlaceholders

File

core/tests/Drupal/Tests/Core/Render/RendererPlaceholdersTest.php, line 806

Class

RendererPlaceholdersTest

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

Namespace

Code

public function testRecursivePlaceholder() : void {
    $args = [
        static::randomContextValue(),
    ];
    $element = [];
    $element['#create_placeholder'] = TRUE;
    $element['#lazy_builder'] = [
        'Drupal\\Tests\\Core\\Render\\RecursivePlaceholdersTest::callback',
        $args,
    ];
    $output = $this->renderer
        ->renderRoot($element);
    $this->assertEquals('<p>This is a rendered placeholder!</p>', $output, 'The output has been modified by the indirect, recursive placeholder #lazy_builder callback.');
    $this->assertSame((string) $element['#markup'], '<p>This is a rendered placeholder!</p>', '#markup is overridden by the indirect, recursive placeholder #lazy_builder callback.');
    $expected_js_settings = [
        'dynamic_animal' => $args[0],
    ];
    $this->assertSame($element['#attached']['drupalSettings'], $expected_js_settings, '#attached is modified by the indirect, recursive placeholder #lazy_builder callback.');
}