public function testPreSubmit()
 {
     $form = $this->factory->create($this->formType, null, []);
     $this->formType->preSubmit(new FormEvent($form, null));
     $this->assertTrue($form->has('productUnit'));
     $config = $form->get('productUnit')->getConfig();
     $this->assertEquals(ProductUnitSelectionType::NAME, $config->getType()->getName());
     $options = $config->getOptions();
     $this->assertEquals(false, $options['disabled']);
     $this->assertEquals('orob2b.product.productunit.entity_label', $options['label']);
 }