Empty string or null to FALSE conversion

conversion.cs

using Newtonsoft.Json;
using NUnit.Framework;
using System;

namespace JSON_empty_string_or_null_to_false_conversion
{
    public class MyDocument
    {
        public bool MyFlag { get; set; }

        public bool MyOtherFlag { get; set; }
    }

    public class EmptyStringToFalseConverter : JsonConverter
    {
        public override bool CanConvert(Type objectType)
        {
            return objectType == typeof(bool);
        }

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            if (reader.Value != null)
            {
                string value = reader.Value.ToString().ToLower().Trim();

                if (value == "")
                {
                    return false;
                }
            }

            return new JsonSerializer().Deserialize(reader, objectType);
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            throw new NotImplementedException("This class cannot write JSON!");
        }
    }

    public class NullToFalseConverter : JsonConverter
    {
        public override bool CanConvert(Type objectType)
        {
            return objectType == typeof(bool);
        }

        public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
        {
            var value = reader.Value;

            if (value == null)
            {
                return false;
            }

            return new JsonSerializer().Deserialize(reader, objectType);
        }

        public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
        {
            throw new NotImplementedException("This class cannot write JSON!");
        }
    }

    public class Tests
    {
        [Test]
        public void Deserialize_empty_string_to_false_should_succeed()
        {
            var json = "{\"MyFlag\":true,\"MyOtherFlag\":\"\"}";

            var doc = JsonConvert.DeserializeObject<MyDocument>(json, new EmptyStringToFalseConverter());

            Assert.True(doc.MyFlag);
            Assert.False(doc.MyOtherFlag);
        }

        [Test]
        public void Deserialize_null_to_false_should_succeed()
        {
            var json = "{\"MyFlag\":true,\"MyOtherFlag\":null}";

            var doc = JsonConvert.DeserializeObject<MyDocument>(json, new NullToFalseConverter());

            Assert.True(doc.MyFlag);
            Assert.False(doc.MyOtherFlag);
        }

        [Test]
        public void Deserialize_empty_string_and_null_to_false_should_succeed()
        {
            var json = "{\"MyFlag\":\"\",\"MyOtherFlag\":null}";

            var customConverters = new JsonConverter[]
            {
                new EmptyStringToFalseConverter(),
                new NullToFalseConverter()
            };

            var doc = JsonConvert.DeserializeObject<MyDocument>(json, customConverters);

            Assert.False(doc.MyFlag);
            Assert.False(doc.MyOtherFlag);
        }
    }
}