ExampleMatacherTest.java

ExampleMatacherTest.java

@RunWith(SpringRunner.class)
@SpringBootTest
public class ExampleMatcherTest {

    @Autowired
    private ExampleRepository repository;

    @Test
    public void exampleTest() {
        Child child = new Child();
        child.setName("C");

        Parent parent = new Parent();
        parent.setChild(child);

        ExampleMatcher matcher = ExampleMatcher.matching()
                .withIgnoreNullValues()
                .withStringMatcher(ExampleMatcher.StringMatcher.CONTAINING);

        Example<Parent> example = Example.of(parent, matcher);
        assertTrue(repository.findAll(example).size > 0);
    }
}

ExampleRepository.java

public interface ExampleRepository extends JpaRepository<Parent, Long> {
}