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Unit Test validateForm of custom content entity form

I have a custom content entity and some custom validations in the entity form validateForm method.

Now I "just" want to test my implementation of the validateForm method (or for the start I just want to test for the correct form id, but even this fails).

Mocking my own custom entity is the main problem I have at the moment.

Here are some code examples and my error message This is my custom validateForm method:

public function validateForm(     array &$form,     FormStateInterface $form_state   ): ContentEntityInterface {      $simpleField = $form_state->getValue("field_simplefield")[0]['value'];          if (preg_match('/^simpleRegEx$/', $simpleField)) {       $form_state->setErrorByName('field_simplefield', $this->t('Not valid'));     }      return parent::validateForm(       $form,       $form_state     );   }

And this is my test:

// Test that the correct form ID is returned   public function testFormId() {     $container = new ContainerBuilder();     $entityRepository = $this->prophesize(EntityRepositoryInterface::class);     $container->set('entity.repository', $entityRepository->reveal());     $entityTypeBundleInfo = $this->prophesize(EntityTypeBundleInfoInterface::class);     $container->set('entity_type.bundle.info', $entityTypeBundleInfo->reveal());     $time = $this->prophesize(Time::class);     $container->set('datetime.time', $time->reveal());       $form = new CustomEntityForm($entityRepository->reveal(), $entityTypeBundleInfo->reveal(), $time->reveal());     $this->assertEquals('module_name_settings_form', $form->getFormId());   }

It fails with error:

Error : Call to a member function getEntityTypeId() on null  path/web/core/lib/Drupal/Core/Entity/EntityForm.php:79 path/web/profiles/contrib/a_profile/modules/emp_customentity/tests/src/Unit/CustomEntityFormTest.php:59  path/vendor/phpunit/phpunit/src/Framework/TestResult.php:726  path/vendor/phpunit/phpunit/src/Framework/TestSuite.php:677  path/vendor/phpunit/phpunit/src/Framework/TestSuite.php:677  path/vendor/phpunit/phpunit/src/TextUI/TestRunner.php:673  path/vendor/phpunit/phpunit/src/TextUI/Command.php:143  path/vendor/phpunit/phpunit/src/TextUI/Command.php:96

Is there a rather easy way to do this or do I have to mock all the necessary services (entity.repository, entity_type.bundle.info, datetime.time) AND my own entity to call the function validateForm in my test?

And then if this is solved, how the heck do I test the validateForm method?

This article was republished from its original source.
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Unit Test validateForm of custom content entity form

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