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