MultistepFormTest.php

<?php

namespace Drupal\Tests\form_api_example\Functional;

use Drupal\Core\Url;
use Drupal\Tests\BrowserTestBase;

/**
 * Tests the Multistep FAPI Example.
 *
 * @group form_api_example
 * @group examples
 */
class MultistepFormTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'form_api_example',
  ];
  
  /**
   * Test of paths through the example wizard form.
   */
  public function testWizardForm() {
    $this->drupalGet(Url::fromRoute('form_api_example.multistep_form'));
    $page = $this->getSession()
      ->getPage();
    $h1 = $page->find('css', 'h1');
    $this->assertStringContainsString('Multistep form', $h1->getText());
    $desc = $page->find('css', '#edit-description label');
    $this->assertStringContainsString('page 1', $desc->getText());
    $this->submitForm([
      'first_name' => 'Bozo',
      'last_name' => 'Di Clown',
      'birth_year' => 1980,
    ], 'Next');
    // Really new page?
    $page2 = $this->getSession()
      ->getPage();
    $desc = $page2->find('css', '#edit-description label');
    $this->assertStringContainsString('page 2', $desc->getText());
    // Try the back button.
    $this->submitForm([], 'Back');
    $page1 = $this->getSession()
      ->getPage();
    $desc = $page1->find('css', '#edit-description label');
    $this->assertStringContainsString('page 1', $desc->getText());
    // Is the form still filled out?
    $first_name = $page1->findField('first_name')
      ->getValue();
    $this->assertEquals('Bozo', $first_name);
    $second_name = $page1->findField('last_name')
      ->getValue();
    $this->assertEquals('Di Clown', $second_name);
    $birth_year = $page1->findField('birth_year')
      ->getValue();
    $this->assertEquals('1980', $birth_year);
    // Back to the second page.
    $this->click('#edit-next');
    $page2 = $this->getSession()
      ->getPage();
    $desc = $page2->find('css', '#edit-description label');
    $this->assertStringContainsString('page 2', $desc->getText());
    $this->submitForm([
      'color' => 'neon green',
    ], 'Submit');
    // This should take us back to the first page with a status message.
    $messages = $this->getSession()
      ->getPage()
      ->find('css', 'div[data-drupal-messages] ul');
    $message_text = $messages->getHtml();
    $this->assertStringContainsString('Bozo Di Clown', $message_text);
    $this->assertStringContainsString('1980', $message_text);
    $this->assertStringContainsString('neon green', $message_text);
  }

}