Custom ConstraintValidator unit test using Quarkus - constraints

Question

I need to make validations on my custom ConstraintValidator that uses an #Inject needed for some validations, it's like this example from quarkus https://quarkus.io/guides/validation
#ApplicationScoped
public class MyConstraintValidator implements ConstraintValidator<MyConstraint, String> {
#Inject
MyService service;
#Override
public boolean isValid(String value, ConstraintValidatorContext context) {
if (value == null) {
return true;
}
return service.validate(value);
}
}
When i run the application I see that is made the right validation, but i'm trying to make unit test using mockito i can't mock the object is always null on the default using the Default Bean validation.
On the example from quarkus is unit test only for integration.
this is my implementation
#ApplicationScoped
public class MyConstraintValidator implements ConstraintValidator<MyConstraint, String> {
#Inject
BookService service;
#ConfigProperty(name = "my.property")
int myLimit;
public MyConstraintValidator(BookService service) {
this.service = service;
}
#Override
public boolean isValid(String value, ConstraintValidatorContext context) {
System.out.println("myLimit property: " + myLimit);
int limit = Integer.parseInt(value);
if (limit < myLimit) {
return service.validate(value);
} else {
context.disableDefaultConstraintViolation();
context.buildConstraintViolationWithTemplate(NAME_EMPTY).addConstraintViolation();
return false;
}
}
}
Unit test for testing the custom Validator
#Test
void testAmountValidationWithContext() {
BookRequest bookRequest = new BookRequest();
bookRequest.setTitle("my title");
bookRequest.setAuthor("my Author");
bookRequest.setPages(2L);
bookRequest.setAmount("11");
//when:
myConstraintValidator = new MyConstraintValidator(service);
Mockito.when(service.validate(anyString())).thenReturn(true);
//then:
Set<ConstraintViolation<BookRequest>> violations = validator.validate(bookRequest);
// verify that the context is called with the correct argument
Mockito.verify(context).buildConstraintViolationWithTemplate(NAME_EMPTY);
}
The unit test to test the default #NoBlank.
#Test
void testBeanValidationWithInvalidAmount() {
BookRequest bookRequest = new BookRequest();
bookRequest.setTitle("my title");
bookRequest.setAuthor("my Author");
bookRequest.setPages(2L);
bookRequest.setAmount("AA");
//when:
Set<ConstraintViolation<BookRequest>> violations = validator.validate(bookRequest);
//then:
assertEquals(1, violations.size());
assertEquals(NOT_EMPTY, violations.stream().findFirst().get().getMessage());
}
The first unit test works weel, i can mock the object and test the result.
The problem is on my second test, when i try to test the other validations #NotNull, #Pattern. On this test the method isValid() is also invoked and here it's my problem because the #ConfigProperty and the #Inject are always null, and i can't mocked them.
I already saw several examples over internet but doesn't work and are almost for spring but i need to make the custom validation on quarkus.
How can i implement the custom ConstraintValidator unit test using quarkus?
Does any one have any example with this working?

Answer 1

Changing your code from field injection to constructor injection will make unit testing much easier.
#ApplicationScoped
public class MyConstraintValidator implements ConstraintValidator<MyConstraint, String> {
private final MyService service;
private final int myLimit;
public MyConstraintValidator(MyService service, #ConfigProperty(name = "my.property") int myLimit) {
this.service = service;
this.myLimit = myLimit;
}
#Override
public boolean isValid(String value, ConstraintValidatorContext context)
{
if (value == null) {
return true;
}
return service.validate(value);
}
}

Answer 2

Updated description with my implementations.
but resuming the issue.
when i have the default annotations with my custom validator i can't mock the objects using the
Set<ConstraintViolation<BookRequest>> violations = validator.validate(bookRequest);