public void ReturnFalseAndUnmatchMessage_WhenArgumentIsNotEqual()
{
// Arrange.
string value = "xyz";
StringEqualValidationPredicate validationPredicate = new StringEqualValidationPredicate("abc", StringComparison.OrdinalIgnoreCase);
// Act.
IValidationPredicateResult result = validationPredicate.Match(value);
// Assert.
Assert.IsFalse(result.IsMatch);
Assert.AreEqual("Argument value <xyz> is not equal to <abc>. StringComparison <OrdinalIgnoreCase>.", result.Message);
}