public void ReturnTrueAndMatchMessage_WhenArgumentIsMemberOfTheEnum()
{
// Arrange.
CustomEnum value = CustomEnum.Value2;
// Act.
IValidationPredicateResult result = MemberOfEnumValidationPredicate<CustomEnum>.Instance.Match(value);
// Assert.
Assert.IsTrue(result.IsMatch);
Assert.AreEqual("Argument value <Value2> is member of the enum <Bytes2you.Validation.UnitTests.Testing.Mocks.CustomEnum>.", result.Message);
}