public void Int64StringConvertToStringTest()
        {
            var   convert = new Int64StringConverter();
            Int64 v       = 1111111;

            Assert.AreEqual("1111111", convert.ConvertToString(v));
        }
        public void Int64StringConvertFromStringTest()
        {
            var   convert = new Int64StringConverter();
            Int64 v       = 1111111;

            Assert.AreEqual(v, convert.ConvertFromString("1111111", typeof(Int64)));
        }
        public void TestInt64StringConvertTo()
        {
            var converter = new Int64StringConverter();

            Assert.AreEqual(long.MinValue.ToString(), converter.ConvertTo(long.MinValue, typeof(string)));
            Assert.AreEqual("19283718291", converter.ConvertTo(19283718291, typeof(string)));
            Assert.AreEqual(long.MaxValue.ToString(), converter.ConvertTo(long.MaxValue, typeof(string)));
        }