public void ReturnTrueAndMatchMessage_WhenBoundIsNotNullAndArgumentIsNull()
{
// Arrange.
string value = null;
LessThanOrEqualValidationPredicate<string> validationPredicate = new LessThanOrEqualValidationPredicate<string>("a");
// Act.
IValidationPredicateResult result = validationPredicate.Match(value);
// Assert.
Assert.IsTrue(result.IsMatch);
Assert.AreEqual("Argument value <null> is less than or equal to <a>.", result.Message);
}
}