public void NullTest()
        {
            var test = new ErrorMessageTestClass(null);

            Assert.IsTrue(test.Validate());
            Assert.IsTrue(test.Errors.Count == 0);
        }
        public void InvalidTest()
        {
            var test = new ErrorMessageTestClass("123456789");

            Assert.IsFalse(test.Validate());
            Assert.IsTrue(test.Errors.Count == 1);
            Assert.IsTrue(test.Errors[0] == ErrorMessageTestClass.ERROR_MESSAGE);
        }