public void ReturnFalseAndUnmatchMessage_WhenArgumentIsEmpty()
{
// Arrange.
string value = string.Empty;
// Act.
IValidationPredicateResult result = StringNotEmptyValidationPredicate.Instance.Match(value);
// Assert.
Assert.IsFalse(result.IsMatch);
Assert.AreEqual("The argument is an empty string.", result.Message);
}
}