public void RelativeVector2TypeConverterConvertToString()
        {
            tlog.Debug(tag, $"RelativeVector2TypeConverterConvertToString START");

            var testingTarget = new RelativeVector2TypeConverterImpl();

            Assert.IsNotNull(testingTarget, "Can't create success object RelativeVector2TypeConverter.");
            Assert.IsInstanceOf <RelativeVector2TypeConverter>(testingTarget, "Should return RelativeVector2TypeConverter instance.");

            // null
            var result = testingTarget.ConvertToString(0.3f);

            tlog.Debug(tag, "ConvertToString : " + result);

            using (RelativeVector2 vec = new RelativeVector2(0.1f, 0.3f))
            {
                result = testingTarget.ConvertToString(vec);
                tlog.Debug(tag, "ConvertToString : " + result);
            }

            tlog.Debug(tag, $"RelativeVector2TypeConverterConvertToString END");
        }
        public void RelativeVector2TypeConverterConvertFromInvariantString()
        {
            tlog.Debug(tag, $"RelativeVector2TypeConverterConvertFromInvariantString START");

            var testingTarget = new RelativeVector2TypeConverterImpl();

            Assert.IsNotNull(testingTarget, "Can't create success object RelativeVector2TypeConverter.");
            Assert.IsInstanceOf <RelativeVector2TypeConverter>(testingTarget, "Should return RelativeVector2TypeConverter instance.");

            // length is 2
            var result = testingTarget.ConvertFromInvariantString("100, 50");

            tlog.Debug(tag, "ConvertFromInvariantString : " + result);

            // length is 1
            result = testingTarget.ConvertFromInvariantString("100");
            tlog.Debug(tag, "ConvertFromInvariantString : " + result);

            Assert.Throws <InvalidOperationException>(() => testingTarget.ConvertFromInvariantString("100, 50, 30"));// lenght is 3

            tlog.Debug(tag, $"RelativeVector2TypeConverterConvertFromInvariantString END");
        }