Is there a way to test CriteriaBuilder.isFalse() from Spring JPA?

Question

I have a method that creates a Specification (Spring JPA) from my custom object to check if its attribute is False with the method. Using Mockito, I tried do the unit test below.

void unitTestIsNotDeleted() {
    Root root = mock(Root.class)
    CriteriaBuilder cb = mock(CriteriaBuilder.class)
    Predicate predicate = mock(Predicate.class);
    Path<Object> path = mock(Path.class);

    when(root.get("deleted")).thenReturn(path);
    when(cb.isFalse(path)).thenReturn(predicate);

    Specification<MyObj> specification = CustomSpecifications.isNotDeleted();
    Assertions.assertNotNull(specification);
    Predicate result = specification.toPredicate(root, query, cb);

    Assertions.assertNotNull(result);
    Assertions.assertEquals(predicate, result);
}

I got the exception below when I try run the code. However I did similar tests with CriteriaBuilder.equals(), but I haven't gotten this kind of exception. Any solutions to this trouble?

java: incompatible types: jakarta.persistence.criteria.Path<java.lang.Object> cannot be converted to jakarta.persistence.criteria.Expression<java.lang.Boolean>

I tried do something with a intermediary Path<Boolean> converting the Path<Object> into it, but I got PotentialStubbingProblem because misuse of Mocks. I also tried Mockito.lenient(), which runs the test, yet result in a failed test.

why there are two variables with same name predicate ? share actual code — sidgate
– sidgate, Commented May 23 at 3:36

洪紹恩 · Accepted Answer · 2025-05-23 07:10:33Z

0

You're encountering this error because the method CriteriaBuilder.isFalse() expects a parameter of type Expression<Boolean>, but you're passing a mock of type Path<Object>. Although Path<Boolean> is a subtype of Expression<Boolean>, your mock is declared as Path<Object>, and that's why the compiler complains.

answered May 23 at 7:10

洪紹恩

1

Sign up to request clarification or add additional context in comments.

1 Comment

bogu399 May 23 at 13:41

How could it be solved?

Collectives™ on Stack Overflow

Is there a way to test CriteriaBuilder.isFalse() from Spring JPA?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related