public void AnnotatedCustomStructFormatterNullValueIncludeNullsUtf8()
        {
            var input = new AnnotatedCustomStructHelper
            {
                S = null
            };

            var serialized = JsonSerializer.Generic.Utf8.Serialize <AnnotatedCustomStructHelper, IncludeNullsOriginalCaseResolver <byte> >(input);

            Assert.NotNull(serialized);
            var deserialized = JsonSerializer.Generic.Utf8.Deserialize <AnnotatedCustomStructHelper, IncludeNullsOriginalCaseResolver <byte> >(serialized);

            Assert.Equal(input.S, deserialized.S);
        }
        public void AnnotatedCustomStructFormatterExcludeNullsUtf16()
        {
            var input = new AnnotatedCustomStructHelper
            {
                S = new AnnotatedCustomStruct
                {
                    Value = 1,
                }
            };

            var serialized = JsonSerializer.Generic.Utf16.Serialize <AnnotatedCustomStructHelper, ExcludeNullsOriginalCaseResolver <char> >(input);

            Assert.NotNull(serialized);
            var deserialized = JsonSerializer.Generic.Utf16.Deserialize <AnnotatedCustomStructHelper, ExcludeNullsOriginalCaseResolver <char> >(serialized);

            Assert.Equal(input.S, deserialized.S);
        }