public void LongTypeConverter_ConvertCoreWithNullString_Converts()
        {
            string source = null;

            var result = LongTypeConverter.Convert(source);

            Assert.IsTrue(result == 0);
        }
        public void LongTypeConverter_ConvertCoreWithEmptyString_Converts()
        {
            string source = string.Empty;

            var result = LongTypeConverter.Convert(source);

            Assert.IsTrue(result == 0);
        }
        public void LongTypeConverter_ConvertCoreWithValidString_Converts()
        {
            long   number = 5;
            string source = number.ToString();

            var result = LongTypeConverter.Convert(source);

            Assert.IsTrue(result == number);
        }