public function FrameworkTest::testOrder in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/system/tests/src/Functional/Ajax/FrameworkTest.php \Drupal\Tests\system\Functional\Ajax\FrameworkTest::testOrder()

Tests AjaxResponse::prepare() AJAX commands ordering.

File

core/modules/system/tests/src/Functional/Ajax/FrameworkTest.php, line 46

Class

FrameworkTest

Performs tests on AJAX framework functions.

Namespace

Drupal\Tests\system\Functional\Ajax

Code

public function testOrder() {
  $expected_commands = [];

  // Expected commands, in a very specific order.
  $asset_resolver = \Drupal::service('asset.resolver');
  $css_collection_renderer = \Drupal::service('asset.css.collection_renderer');
  $js_collection_renderer = \Drupal::service('asset.js.collection_renderer');
  $renderer = \Drupal::service('renderer');
  $build['#attached']['library'][] = 'ajax_test/order-css-command';
  $assets = AttachedAssets::createFromRenderArray($build);
  $css_render_array = $css_collection_renderer
    ->render($asset_resolver
    ->getCssAssets($assets, FALSE));
  $expected_commands[1] = new AddCssCommand($renderer
    ->renderRoot($css_render_array));
  $build['#attached']['library'][] = 'ajax_test/order-header-js-command';
  $build['#attached']['library'][] = 'ajax_test/order-footer-js-command';
  $assets = AttachedAssets::createFromRenderArray($build);
  list($js_assets_header, $js_assets_footer) = $asset_resolver
    ->getJsAssets($assets, FALSE);
  $js_header_render_array = $js_collection_renderer
    ->render($js_assets_header);
  $js_footer_render_array = $js_collection_renderer
    ->render($js_assets_footer);
  $expected_commands[2] = new PrependCommand('head', $js_header_render_array);
  $expected_commands[3] = new AppendCommand('body', $js_footer_render_array);
  $expected_commands[4] = new HtmlCommand('body', 'Hello, world!');

  // Load any page with at least one CSS file, at least one JavaScript file
  // and at least one #ajax-powered element. The latter is an assumption of
  // drupalPostAjaxForm(), the two former are assumptions of the Ajax
  // renderer.
  // @todo refactor AJAX Framework + tests to make less assumptions.
  $this
    ->drupalGet('ajax_forms_test_lazy_load_form');

  // Verify AJAX command order — this should always be the order:
  // 1. CSS files
  // 2. JavaScript files in the header
  // 3. JavaScript files in the footer
  // 4. Any other AJAX commands, in whatever order they were added.
  $commands = $this
    ->drupalGetAjax('ajax-test/order');
  $this
    ->assertCommand(array_slice($commands, 0, 1), $expected_commands[1]
    ->render());
  $this
    ->assertCommand(array_slice($commands, 1, 1), $expected_commands[2]
    ->render());
  $this
    ->assertCommand(array_slice($commands, 2, 1), $expected_commands[3]
    ->render());
  $this
    ->assertCommand(array_slice($commands, 3, 1), $expected_commands[4]
    ->render());
}