### Question:
AssertFalseValidator implements ConstraintValidator<AssertFalse, Boolean> { @Override public boolean isValid(Boolean value, ConstraintValidatorContext context) { return !Boolean.TRUE.equals(value); }  @Override boolean isValid(Boolean value, ConstraintValidatorContext context);  }### Answer:
@Test public void testAssertFalseValidator() { AssertFalseValidator afv = new AssertFalseValidator(); assertFalse("True value validation must fail", afv.isValid(true, null)); assertTrue("False value validation must succeed", afv.isValid(false, null)); assertTrue("Null value validation must succeed", afv.isValid(null, null)); }