class DynamicFormSectionsTest

class DynamicFormSectionsTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'ajax_example',
  ];
  
  /**
   * Test the dynamic sections form without AJAX.
   */
  public function testDynamicFormSections() {
    // Get the Mink stuff.
    $assert = $this->assertSession();
    $page = $this->getSession()
      ->getPage();
    // Get a URL object for the form, specifying no JS.
    $dropdown_url = Url::fromRoute('ajax_example.dynamic_form_sections', [
      'nojs' => 'nojs',
    ]);
    // Get the form.
    $this->drupalGet($dropdown_url);
    // Check for the initial state.
    $detail_children = $page->findAll('css', 'div.details-wrapper *');
    $this->assertEmpty($detail_children);
    // Go through the dropdown options. First outlier is 'Choose question style'
    // which should have an empty details section.
    $this->drupalGet($dropdown_url);
    $this->submitForm([
      'question_type_select' => 'Choose question style',
    ], 'Choose');
    $detail_children = $page->findAll('css', 'div.details-wrapper *');
    $this->assertEquals(count($detail_children), 0);
    // Cycle through the other dropdown values.
    $question_styles = [
      'Multiple Choice',
      'True/False',
      'Fill-in-the-blanks',
    ];
    // These all add stuff to the details wrapper.
    foreach ($question_styles as $question_style) {
      $this->drupalGet($dropdown_url);
      $this->submitForm([
        'question_type_select' => $question_style,
      ], 'Choose');
      $detail_children = $page->findAll('css', 'div.details-wrapper *');
      $this->assertNotEquals($this->count($detail_children), 0);
      $this->submitForm([
        'question' => 'George Washington',
      ], 'Submit your answer');
      $assert->pageTextContains('You got the right answer: George Washington');
    }
    // One wrong answer to exercise that code path.
    $this->drupalGet($dropdown_url);
    $this->submitForm([
      'question_type_select' => 'Multiple Choice',
    ], 'Choose');
    $detail_children = $page->findAll('css', 'div.details-wrapper *');
    $this->assertNotEquals($this->count($detail_children), 0);
    $this->submitForm([
      'question' => 'Abraham Lincoln',
    ], 'Submit your answer');
    $assert->pageTextContains('Sorry, your answer (Abraham Lincoln) is wrong');
  }

}