### Question:
CheckQueryDetailsNullValidator implements ConstraintValidator<CheckQueryDetailsNull,
        List<ClientQueryField>>, ValidationErrorDescriptorBuilder { @Override public void initialize(CheckQueryDetailsNull constraintAnnotation) { }  @Override void initialize(CheckQueryDetailsNull constraintAnnotation); @Override boolean isValid(List<ClientQueryField> value, ConstraintValidatorContext context); @Override ErrorDescriptor build(ConstraintViolation violation);  }### Answer:
@Test public void initialize_success() { CheckQueryDetailsNull annotation = mock(CheckQueryDetailsNull.class); validator.initialize(annotation); }