class UserMailRequiredValidatorTest

class UserMailRequiredValidatorTest extends UnitTestCase {
    
    /**
     * Creates a validator instance.
     *
     * @param bool $is_admin
     *   Whether or not the current user is an administrator.
     *
     * @return \Drupal\user\Plugin\Validation\Constraint\UserMailRequiredValidator
     *   The validator instance.
     */
    protected function createValidator($is_admin) {
        // Setup mocks that don't need to change.
        $unchanged_account = $this->prophesize(UserInterface::class);
        $unchanged_account->getEmail()
            ->willReturn(NULL);
        $user_storage = $this->prophesize(UserStorageInterface::class);
        $user_storage->loadUnchanged(3)
            ->willReturn($unchanged_account->reveal());
        $entity_type_manager = $this->prophesize(EntityTypeManagerInterface::class);
        $entity_type_manager->getStorage('user')
            ->willReturn($user_storage->reveal());
        $current_user = $this->prophesize(AccountInterface::class);
        $current_user->id()
            ->willReturn(3);
        $current_user->hasPermission("administer users")
            ->willReturn($is_admin);
        $container = new ContainerBuilder();
        $container->set('entity_type.manager', $entity_type_manager->reveal());
        $container->set('current_user', $current_user->reveal());
        \Drupal::setContainer($container);
        return new UserMailRequiredValidator();
    }
    
    /**
     * @covers ::validate
     *
     * @dataProvider providerTestValidate
     */
    public function testValidate($items, $expected_violation, $is_admin = FALSE) : void {
        $constraint = new UserMailRequired();
        // If a violation is expected, then the context's addViolation method will
        // be called, otherwise it should not be called.
        $context = $this->prophesize(ExecutionContextInterface::class);
        if ($expected_violation) {
            $context->addViolation('@name field is required.', [
                '@name' => 'Email',
            ])
                ->shouldBeCalledTimes(1);
        }
        else {
            $context->addViolation()
                ->shouldNotBeCalled();
        }
        $validator = $this->createValidator($is_admin);
        $validator->initialize($context->reveal());
        $validator->validate($items, $constraint);
    }
    
    /**
     * Data provider for ::testValidate().
     */
    public static function providerTestValidate() {
        $prophet = new Prophet();
        $cases = [];
        // Case 1: Empty user should be ignored.
        $items = $prophet->prophesize(FieldItemListInterface::class);
        $items->getEntity()
            ->willReturn(NULL)
            ->shouldBeCalledTimes(1);
        $cases['Empty user should be ignored'] = [
            $items->reveal(),
            FALSE,
        ];
        // Case 2: New users without an email should add a violation.
        $items = $prophet->prophesize(FieldItemListInterface::class);
        $account = $prophet->prophesize(UserInterface::class);
        $account->isNew()
            ->willReturn(TRUE);
        $account->id()
            ->shouldNotBeCalled();
        $field_definition = $prophet->prophesize(FieldDefinitionInterface::class);
        $field_definition->getLabel()
            ->willReturn('Email');
        $account->getFieldDefinition("mail")
            ->willReturn($field_definition->reveal())
            ->shouldBeCalledTimes(1);
        $items->getEntity()
            ->willReturn($account->reveal())
            ->shouldBeCalledTimes(1);
        $items->isEmpty()
            ->willReturn(TRUE);
        $cases['New users without an email should add a violation'] = [
            $items->reveal(),
            TRUE,
        ];
        // Case 3: Existing users without an email should add a violation.
        $items = $prophet->prophesize(FieldItemListInterface::class);
        $account = $prophet->prophesize(UserInterface::class);
        $account->isNew()
            ->willReturn(FALSE);
        $account->id()
            ->willReturn(3);
        $field_definition = $prophet->prophesize(FieldDefinitionInterface::class);
        $field_definition->getLabel()
            ->willReturn('Email');
        $account->getFieldDefinition("mail")
            ->willReturn($field_definition->reveal())
            ->shouldBeCalledTimes(1);
        $items->getEntity()
            ->willReturn($account->reveal())
            ->shouldBeCalledTimes(1);
        $items->isEmpty()
            ->willReturn(TRUE);
        $cases['Existing users without an email should add a violation'] = [
            $items->reveal(),
            TRUE,
        ];
        // Case 4: New user with an email is valid.
        $items = $prophet->prophesize(FieldItemListInterface::class);
        $account = $prophet->prophesize(UserInterface::class);
        $account->isNew()
            ->willReturn(TRUE);
        $account->id()
            ->shouldNotBeCalled();
        $field_definition = $prophet->prophesize(FieldDefinitionInterface::class);
        $field_definition->getLabel()
            ->willReturn('Email');
        $account->getFieldDefinition("mail")
            ->willReturn($field_definition->reveal())
            ->shouldBeCalledTimes(1);
        $items->getEntity()
            ->willReturn($account->reveal())
            ->shouldBeCalledTimes(1);
        $items->isEmpty()
            ->willReturn(FALSE);
        $cases['New user with an email is valid'] = [
            $items->reveal(),
            FALSE,
        ];
        // Case 5: Existing users with an email should be ignored.
        $items = $prophet->prophesize(FieldItemListInterface::class);
        $account = $prophet->prophesize(UserInterface::class);
        $account->isNew()
            ->willReturn(FALSE);
        $account->id()
            ->willReturn(3);
        $field_definition = $prophet->prophesize(FieldDefinitionInterface::class);
        $field_definition->getLabel()
            ->willReturn('Email');
        $account->getFieldDefinition("mail")
            ->willReturn($field_definition->reveal())
            ->shouldBeCalledTimes(1);
        $items->getEntity()
            ->willReturn($account->reveal())
            ->shouldBeCalledTimes(1);
        $items->isEmpty()
            ->willReturn(FALSE);
        $cases['Existing users with an email should be ignored'] = [
            $items->reveal(),
            FALSE,
        ];
        // Case 6: Existing users without an email should be ignored if the current
        // user is an administrator.
        $items = $prophet->prophesize(FieldItemListInterface::class);
        $account = $prophet->prophesize(UserInterface::class);
        $account->isNew()
            ->willReturn(FALSE);
        $account->id()
            ->willReturn(3);
        $field_definition = $prophet->prophesize(FieldDefinitionInterface::class);
        $field_definition->getLabel()
            ->willReturn('Email');
        $account->getFieldDefinition("mail")
            ->willReturn($field_definition->reveal())
            ->shouldBeCalledTimes(1);
        $items->getEntity()
            ->willReturn($account->reveal())
            ->shouldBeCalledTimes(1);
        $items->isEmpty()
            ->willReturn(TRUE);
        $cases['Existing users without an email should be ignored if the current user is an administrator.'] = [
            $items->reveal(),
            FALSE,
            TRUE,
        ];
        return $cases;
    }

}