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