class RestExampleSettingsTest

class RestExampleSettingsTest extends BrowserTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'rest_example',
  ];
  
  /**
   * The installation profile to use with this test.
   *
   * @var string
   */
  protected $profile = 'minimal';
  
  /**
   * Test that the form can be submitted.
   *
   * @throws \Drupal\Core\Entity\EntityStorageException
   */
  public function testRestExampleSettings() {
    global $base_url;
    $account = $this->drupalCreateUser();
    $this->drupalLogin($account);
    $this->drupalGet('examples/rest-client-settings');
    $edit = [
      'server_url' => $base_url,
      'server_username' => $account->get('name')->value,
      'server_password' => $account->passRaw,
    ];
    $this->drupalGet(base_path() . 'examples/rest-client-settings');
    $this->submitForm($edit, t('Save configuration'));
    $this->assertSession()
      ->pageTextContains('The configuration options have been saved.');
    $config_factory = \Drupal::configFactory();
    $rest_config = $config_factory->get('rest_example.settings');
    self::assertEquals($base_url, $rest_config->get('server_url'));
    self::assertEquals($account->get('name')->value, $rest_config->get('server_username'));
    self::assertEquals($account->passRaw, $rest_config->get('server_password'));
  }

}