function RendererPlaceholdersTest::testNonArrayReturnFromLazyBuilder

Tests that an error is thrown if a lazy builder doesn't return an array.

File

core/tests/Drupal/Tests/Core/Render/RendererPlaceholdersTest.php, line 971

Class

RendererPlaceholdersTest

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

Namespace

Code

public function testNonArrayReturnFromLazyBuilder() : void {
    $element = [
        '#lazy_builder' => [
            '\\Drupal\\Tests\\Core\\Render\\PlaceholdersTest::callbackNonArrayReturn',
            [],
        ],
    ];
    $this->expectException('AssertionError');
    $this->expectExceptionMessage("#lazy_builder callbacks must return a valid renderable array, got boolean from \\Drupal\\Tests\\Core\\Render\\PlaceholdersTest::callbackNonArrayReturn");
    $this->renderer
        ->renderRoot($element);
}