Blank example

'activated' => true,
                'compared_value' => 'bar',
            ],
        ]));

        $this->assertNoViolation();
    }

    public function testConstraintViolations()
    {
        $constraints = [
            new Blank([
                'message' => 'my_message',
            ]),
        ];
        $this->expectFailingValueValidation(
            0,
            'foo',
            $constraints,
            null,
            new ConstraintViolation(
                'my_message',
                'my_message',
                [

use Symfony\Component\Validator\Test\ConstraintValidatorTestCase;

class BlankValidatorTest extends ConstraintValidatorTestCase
{
    protected function createValidator(): BlankValidator
    {
        return new BlankValidator();
    }

    public function testNullIsValid()
    {
        $this->validator->validate(null, new Blank());

        $this->assertNoViolation();
    }

    public function testBlankIsValid()
    {
        $this->validator->validate('', new Blank());

        $this->assertNoViolation();
    }

    

class ValidationTest extends TestCase
{
    public function testCreateCallableValid()
    {
        $validator = Validation::createCallable(new NotBlank());
        $this->assertEquals('test@example.com', $validator('test@example.com'));
    }

    public function testCreateCallableInvalid()
    {
        $validator = Validation::createCallable(new Blank());
        try {
            $validator('test');
            $this->fail('No ValidationFailedException thrown');
        } catch (ValidationFailedException $e) {
            $this->assertEquals('test', $e->getValue());

            $violations = $e->getViolations();
            $this->assertCount(1, $violations);
            $this->assertEquals('This value should be blank.', $violations->get(0)->getMessage());
        }
    }