class JSInteractionTest

class JSInteractionTest extends WebDriverTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'js_interaction_test',
  ];
  
  /**
   * Assert an exception is thrown when the blocker element is never removed.
   */
  public function testNotClickable() {
    $this->expectException(Exception::class);
    $this->drupalGet('/js_interaction_test');
    $this->assertSession()
      ->elementExists('named', [
      'link',
      'Target link',
    ])
      ->click();
  }
  
  /**
   * Assert an exception is thrown when the field is never enabled.
   */
  public function testFieldValueNotSettable() {
    $this->expectException(Exception::class);
    $this->drupalGet('/js_interaction_test');
    $this->assertSession()
      ->fieldExists('target_field')
      ->setValue('Test');
  }
  
  /**
   * Assert no exception is thrown when elements become interactive.
   */
  public function testElementsInteraction() {
    $this->drupalGet('/js_interaction_test');
    // Remove blocking element after 100 ms.
    $this->clickLink('Remove Blocker Trigger');
    $this->clickLink('Target link');
    // Enable field after 100 ms.
    $this->clickLink('Enable Field Trigger');
    $this->assertSession()
      ->fieldExists('target_field')
      ->setValue('Test');
    $this->assertSession()
      ->fieldValueEquals('target_field', 'Test');
  }

}