function AttachedAssetsTest::testAlter

Tests altering a JavaScript's weight via hook_js_alter().

See also

simpletest_js_alter()

File

core/tests/Drupal/KernelTests/Core/Asset/AttachedAssetsTest.php, line 388

Class

AttachedAssetsTest

Tests #attached assets: attached asset libraries and JavaScript settings.

Namespace

Code

public function testAlter() {
    // Add both tableselect.js and simpletest.js.
    $build['#attached']['library'][] = 'core/drupal.tableselect';
    $build['#attached']['library'][] = 'simpletest/drupal.simpletest';
    $assets = AttachedAssets::createFromRenderArray($build);
    // Render the JavaScript, testing if simpletest.js was altered to be before
    // tableselect.js. See simpletest_js_alter() to see where this alteration
    // takes place.
    $js = $this->assetResolver
        ->getJsAssets($assets, FALSE)[1];
    $js_render_array = \Drupal::service('asset.js.collection_renderer')->render($js);
    $rendered_js = $this->renderer
        ->renderPlain($js_render_array);
    $this->assertTrue(strpos($rendered_js, 'simpletest.js') < strpos($rendered_js, 'core/misc/tableselect.js'), 'Altering JavaScript weight through the alter hook.');
}