Money example

            ->setData('foo')
            ->getForm()
            ->createView();

        $this->assertSame('bar', $view->vars['data']);
        $this->assertSame('baz', $view->vars['value']);
    }

    public function testDataMapperTransformationFailedExceptionInvalidMessageIsUsed()
    {
        $money = new Money(20.5, 'EUR');
        $factory = Forms::createFormFactoryBuilder()
            ->addExtensions([new ValidatorExtension(Validation::createValidator())])
            ->getFormFactory()
        ;

        $builder = $factory
            ->createBuilder(FormType::class, $money, ['invalid_message' => 'not the one to display'])
            ->add('amount', TextType::class)
            ->add('currency', CurrencyType::class)
        ;
        $builder->setDataMapper(new MoneyDataMapper());