using System;

using System.Collections;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Collections.Concurrent;

using System.Reflection;

​

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

using Newtonsoft.Json.Converters;

using Newtonsoft.Json.Serialization;    

​

using NUnit.Framework; // Throws NUnit.Framework.AssertionException

​

using GraphQL.Client.Serializer.Newtonsoft;

​

using GraphQL.Client.Abstractions.Utilities;

​

public sealed class ConstantCaseNamingStrategy : NamingStrategy

{

    protected override string ResolvePropertyName(string name) => name.ToConstantCase();

}

​

//https://stackoverflow.com/questions/79355644/graphql-newtonsoft-serializer-throws-error-while-parsing-enum

​

#nullable enable

​

public enum SomeEnumTypes: byte

{

    None,

    First,

    SecondItem

} 

​

[Flags]

public enum SomeEnumFlagTypes: byte

{

    FlagItemOne   = (1<<0),

    FlagItemTwo   = (1<<1),

    FlagItemThree = (1<<2),

} 

​

//https://github.com/graphql-dotnet/graphql-client/blob/master/src/GraphQL.Client.Serializer.Newtonsoft/ConstantCaseEnumConverter.cs

​

public class Model

{

    public SomeEnumTypes SomeEnumTypes { get; set; }

}

​

    class TestClass

    {

        public static void Test()

        {

            TestFixedNewtonsoftJsonSerializer();

​

            Console.WriteLine();

            TestSystemTextJsonSerializer();

            Console.WriteLine();

            TestNewtonsoftJsonSerializer();

        }

​

        static void TestSystemTextJsonSerializer()

        {

            var serializer = new GraphQL.Client.Serializer.SystemTextJson.SystemTextJsonSerializer();

            TestSystemTextJsonSerializer(serializer);

        }

        public static void TestFixedNewtonsoftJsonSerializer()

        {

            var serializer = 

                new NewtonsoftJsonSerializer(

                    options => 

                        options.Converters.Insert(

                            0, new StringEnumConverter(new ConstantCaseNamingStrategy())));

            TestNewtonsoftJsonSerializer(serializer);

        }

        public static void TestNewtonsoftJsonSerializer()

        {

            var serializer = new NewtonsoftJsonSerializer();

​

            TestNewtonsoftJsonSerializer(serializer);

        }

        public static void TestNewtonsoftJsonSerializer(NewtonsoftJsonSerializer serializer)

        {

            Console.WriteLine("Testing Newtonsoft.Json with {0}", serializer.JsonSerializerSettings.Converters.Where(c => c.CanConvert(typeof(SomeEnumTypes))).FirstOrDefault());

            var settings = serializer.JsonSerializerSettings;

            var json = JsonConvert.SerializeObject(SomeEnumTypes.SecondItem, settings);

            Console.WriteLine(json);

            var json2 = JsonConvert.SerializeObject(SomeEnumFlagTypes.FlagItemThree, settings);

            var json3 = JsonConvert.SerializeObject(SomeEnumFlagTypes.FlagItemOne | SomeEnumFlagTypes.FlagItemThree, settings);

            Console.WriteLine(json2);

            Console.WriteLine(json3);

​

            Assert.That(SomeEnumTypes.SecondItem == JsonConvert.DeserializeObject<SomeEnumTypes>(json, settings));

            Assert.That(SomeEnumFlagTypes.FlagItemThree == JsonConvert.DeserializeObject<SomeEnumFlagTypes>(json2, settings));

            Assert.That((SomeEnumFlagTypes.FlagItemOne | SomeEnumFlagTypes.FlagItemThree) == JsonConvert.DeserializeObject<SomeEnumFlagTypes>(json3, settings));

        }

​

        public static void TestSystemTextJsonSerializer(GraphQL.Client.Serializer.SystemTextJson.SystemTextJsonSerializer serializer)

        {

            Console.WriteLine("Testing System.Text.Json:");

            var options = serializer.Options;

            var json = System.Text.Json.JsonSerializer.Serialize(SomeEnumTypes.SecondItem, options);

            Console.WriteLine(json);

            var json2 = System.Text.Json.JsonSerializer.Serialize(SomeEnumFlagTypes.FlagItemThree, options);

            var json3 = System.Text.Json.JsonSerializer.Serialize(SomeEnumFlagTypes.FlagItemOne | SomeEnumFlagTypes.FlagItemThree, options);

            Console.WriteLine(json2);

            Console.WriteLine(json3);

​

            Assert.That(SomeEnumTypes.SecondItem == System.Text.Json.JsonSerializer.Deserialize<SomeEnumTypes>(json, options));

            Assert.That(SomeEnumFlagTypes.FlagItemThree == System.Text.Json.JsonSerializer.Deserialize<SomeEnumFlagTypes>(json2, options));

            Assert.That((SomeEnumFlagTypes.FlagItemOne | SomeEnumFlagTypes.FlagItemThree) == System.Text.Json.JsonSerializer.Deserialize<SomeEnumFlagTypes>(json3, options));

        }

​

    }

​

    public class Program

    {

        public static void Main()

        {

            Console.WriteLine("Environment version: {0} ({1}), {2}", System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription , Environment.Version, Environment.OSVersion);

            Console.WriteLine("{0} version: {1}", typeof(JsonSerializer).Namespace, typeof(JsonSerializer).Assembly.FullName);

            Console.WriteLine("{0} version: {1}", typeof(GraphQL.Client.Serializer.Newtonsoft.NewtonsoftJsonSerializer).Namespace, typeof(GraphQL.Client.Serializer.Newtonsoft.NewtonsoftJsonSerializer).Assembly.FullName);

            Console.WriteLine();

​

            try

            {

                TestClass.Test();

            }

            catch (Exception ex)

            {

                Console.WriteLine("Failed with unhandled exception: ");

                Console.WriteLine(ex);

                throw;

            }

        }

    }

​