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);
    }

}