public function FrameworkTest::testLazyLoad in Drupal 9

Same name and namespace in other branches

1. 8 core/modules/system/tests/src/FunctionalJavascript/FrameworkTest.php \Drupal\Tests\system\FunctionalJavascript\FrameworkTest::testLazyLoad()

Tests that new JavaScript and CSS files are lazy-loaded on an AJAX request.

File

core/modules/system/tests/src/FunctionalJavascript/FrameworkTest.php, line 28

Class

FrameworkTest

Tests the off-canvas dialog functionality.

Namespace

Drupal\Tests\system\FunctionalJavascript

Code

public function testLazyLoad() {
  $expected = [
    'setting_name' => 'ajax_forms_test_lazy_load_form_submit',
    'setting_value' => 'executed',
    'library_1' => 'system/admin',
    'library_2' => 'system/drupal.system',
  ];

  // Get the base page.
  $this
    ->drupalGet('ajax_forms_test_lazy_load_form');
  $page = $this
    ->getSession()
    ->getPage();
  $assert = $this
    ->assertSession();
  $original_settings = $this
    ->getDrupalSettings();
  $original_libraries = explode(',', $original_settings['ajaxPageState']['libraries']);

  // Verify that the base page doesn't have the settings and files that are to
  // be lazy loaded as part of the next requests.
  $this
    ->assertTrue(!isset($original_settings[$expected['setting_name']]), new FormattableMarkup('Page originally lacks the %setting, as expected.', [
    '%setting' => $expected['setting_name'],
  ]));
  $this
    ->assertNotContains($expected['library_1'], $original_libraries, new FormattableMarkup('Page originally lacks the %library library, as expected.', [
    '%library' => $expected['library_1'],
  ]));
  $this
    ->assertNotContains($expected['library_2'], $original_libraries, new FormattableMarkup('Page originally lacks the %library library, as expected.', [
    '%library' => $expected['library_2'],
  ]));

  // Submit the AJAX request without triggering files getting added.
  $page
    ->pressButton('Submit');
  $assert
    ->assertWaitOnAjaxRequest();
  $new_settings = $this
    ->getDrupalSettings();
  $new_libraries = explode(',', $new_settings['ajaxPageState']['libraries']);

  // Verify the setting was not added when not expected.
  $this
    ->assertTrue(!isset($new_settings[$expected['setting_name']]), new FormattableMarkup('Page still lacks the %setting, as expected.', [
    '%setting' => $expected['setting_name'],
  ]));
  $this
    ->assertNotContains($expected['library_1'], $new_libraries, new FormattableMarkup('Page still lacks the %library library, as expected.', [
    '%library' => $expected['library_1'],
  ]));
  $this
    ->assertNotContains($expected['library_2'], $new_libraries, new FormattableMarkup('Page still lacks the %library library, as expected.', [
    '%library' => $expected['library_2'],
  ]));

  // Submit the AJAX request and trigger adding files.
  $page
    ->checkField('add_files');
  $page
    ->pressButton('Submit');
  $assert
    ->assertWaitOnAjaxRequest();
  $new_settings = $this
    ->getDrupalSettings();
  $new_libraries = explode(',', $new_settings['ajaxPageState']['libraries']);

  // Verify the expected setting was added, both to drupalSettings, and as
  // the first AJAX command.
  $this
    ->assertSame($expected['setting_value'], $new_settings[$expected['setting_name']], new FormattableMarkup('Page now has the %setting.', [
    '%setting' => $expected['setting_name'],
  ]));

  // Verify the expected CSS file was added, both to drupalSettings, and as
  // the second AJAX command for inclusion into the HTML.
  $this
    ->assertContains($expected['library_1'], $new_libraries, new FormattableMarkup('Page state now has the %library library.', [
    '%library' => $expected['library_1'],
  ]));

  // Verify the expected JS file was added, both to drupalSettings, and as
  // the third AJAX command for inclusion into the HTML. By testing for an
  // exact HTML string containing the SCRIPT tag, we also ensure that
  // unexpected JavaScript code, such as a jQuery.extend() that would
  // potentially clobber rather than properly merge settings, didn't
  // accidentally get added.
  $this
    ->assertContains($expected['library_2'], $new_libraries, new FormattableMarkup('Page state now has the %library library.', [
    '%library' => $expected['library_2'],
  ]));
}