class AjaxPageStateTest

class AjaxPageStateTest extends BrowserTestBase {
  
  /**
   * Modules to install.
   *
   * @var array
   */
  protected static $modules = [
    'node',
    'views',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * User account with all available permissions.
   *
   * @var \Drupal\Core\Session\AccountInterface
   */
  protected $adminUser;
  
  /**
   * {@inheritdoc}
   */
  protected function setUp() : void {
    parent::setUp();
    // Create an administrator with all permissions.
    $this->adminUser = $this->drupalCreateUser(array_keys(\Drupal::service('user.permissions')->getPermissions()));
    // Log in so there are more libraries to test for.
    $this->drupalLogin($this->adminUser);
  }
  
  /**
   * Default functionality without the param ajax_page_state[libraries].
   *
   * The libraries active-link and drupalSettings are loaded default from core
   * and available in code as scripts. Do this as the base test.
   */
  public function testLibrariesAvailable() {
    $this->drupalGet('node', []);
    // The active link library from core should be loaded.
    $this->assertSession()
      ->responseContains('/core/misc/active-link.js');
    // The drupalSettings library from core should be loaded.
    $this->assertSession()
      ->responseContains('/core/misc/drupalSettingsLoader.js');
  }
  
  /**
   * Give ajax_page_state[libraries]=core/drupalSettings to exclude the library.
   *
   * When called with ajax_page_state[libraries]=core/drupalSettings the library
   * should be excluded as it is already loaded. This should not affect other
   * libraries so test if active-link is still available.
   */
  public function testDrupalSettingsIsNotLoaded() {
    $this->drupalGet('node', [
      "query" => [
        'ajax_page_state' => [
          'libraries' => 'core/drupalSettings',
        ],
      ],
    ]);
    // The drupalSettings library from core should be excluded from loading.
    $this->assertSession()
      ->responseNotContains('/core/misc/drupalSettingsLoader.js');
    // The active-link library from core should be loaded.
    $this->assertSession()
      ->responseContains('/core/misc/active-link.js');
  }
  
  /**
   * Tests if multiple libraries can be excluded.
   *
   * The ajax_page_state[libraries] should be able to support multiple libraries
   * comma separated.
   */
  public function testMultipleLibrariesAreNotLoaded() {
    $this->drupalGet('node', [
      'query' => [
        'ajax_page_state' => [
          'libraries' => 'core/drupal,core/drupalSettings',
        ],
      ],
    ]);
    $this->assertSession()
      ->statusCodeEquals(200);
    // The drupal library from core should be excluded from loading.
    $this->assertSession()
      ->responseNotContains('/core/misc/drupal.js');
    // The drupalSettings library from core should be excluded from loading.
    $this->assertSession()
      ->responseNotContains('/core/misc/drupalSettingsLoader.js');
    $this->drupalGet('node');
    // The drupal library from core should be included in loading.
    $this->assertSession()
      ->responseContains('/core/misc/drupal.js');
    // The drupalSettings library from core should be included in loading.
    $this->assertSession()
      ->responseContains('/core/misc/drupalSettingsLoader.js');
  }

}