function RendererTestBase::randomContextValue

Generates a random context value for the placeholder tests.

The #context array used by the placeholder #lazy_builder callback will generally be used to provide metadata like entity IDs, field machine names, paths, etc. for JavaScript replacement of content or assets. In this test, the #lazy_builder callback PlaceholdersTest::callback() renders the context inside test HTML, so using any random string would sometimes cause random test failures because the test output would not be parseable. Instead, we provide random tokens for replacement.

See also

PlaceholdersTest::callback()

https://www.drupal.org/node/2151609

File

core/tests/Drupal/Tests/Core/Render/RendererTestBase.php, line 219

Class

RendererTestBase

Base class for the actual unit tests testing \Drupal\Core\Render\Renderer.

Namespace

Code

protected static function randomContextValue() : string {
    $tokens = [
        'llama',
        'alpaca',
        'camel',
        'moose',
        'elk',
    ];
    return $tokens[mt_rand(0, 4)];
}