### Question:
StellaMinValidator implements
		ConstraintValidator<Min, Number> { public boolean isValid(Number value, ConstraintValidatorContext context) { if (value == null) { return true; } if (!acceptedTypes.contains(value.getClass())) { throw new IllegalStateException(Min.class.getSimpleName() + " cannot be used to annotate a field of type " + value.getClass().getName() + ". Only Byte, Short, Integer and Long are accepted."); } Long val = new Long(value.toString()); if (val < annotation.value()) { return false; } return true; }  void initialize(final Min annotation); boolean isValid(Number value, ConstraintValidatorContext context);  }### Answer:
@Test public void testThatNullIsValid() { StellaMinValidator validator = new StellaMinValidator(); Assert.assertTrue(validator.isValid(null,context)); }