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