class FormTestRecipeInputForm

class FormTestRecipeInputForm extends FormBase {
  use RecipeInputFormTrait;
  
  /**
   * {@inheritdoc}
   */
  public function getFormId() : string {
    return 'form_test_recipe_input';
  }
  
  /**
   * Returns the recipe object under test.
   *
   * @return \Drupal\Core\Recipe\Recipe
   *   A Recipe object for the input_test recipe.
   */
  private function getRecipe() : Recipe {
    return Recipe::createFromDirectory('core/tests/fixtures/recipes/input_test');
  }
  
  /**
   * {@inheritdoc}
   */
  public function buildForm(array $form, FormStateInterface $form_state) : array {
    $form += $this->buildRecipeInputForm($this->getRecipe());
    $form['apply'] = [
      '#type' => 'submit',
      '#value' => $this->t('Apply recipe'),
    ];
    return $form;
  }
  
  /**
   * {@inheritdoc}
   */
  public function validateForm(array &$form, FormStateInterface $form_state) : void {
    $this->validateRecipeInput($this->getRecipe(), $form, $form_state);
  }
  
  /**
   * {@inheritdoc}
   */
  public function submitForm(array &$form, FormStateInterface $form_state) : void {
    $recipe = $this->getRecipe();
    $this->setRecipeInput($recipe, $form_state);
    RecipeRunner::processRecipe($recipe);
  }

}