test: migrate to system.text.json (#573)

Author: FantasticFiasco

test/AwsSignatureVersion4.Test.csproj

@@ -19,7 +19,6 @@
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="6.0.0" />
     <PackageReference Include="Microsoft.Extensions.Http" Version="6.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
-    <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <PackageReference Include="Shouldly" Version="4.0.3" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5">

test/Integration/ApiGateway/Contents/Extensions.cs

@@ -1,19 +1,10 @@
-using Newtonsoft.Json;
-using Newtonsoft.Json.Serialization;
+using System.Text.Json;
 
 namespace AwsSignatureVersion4.Integration.ApiGateway.Contents
 {
     public static class Extensions
     {
         public static string ToJson<T>(this T self) =>
-            JsonConvert.SerializeObject(
-                self,
-                new JsonSerializerSettings
-                {
-                    ContractResolver = new DefaultContractResolver
-                    {
-                        NamingStrategy = new CamelCaseNamingStrategy()
-                    }
-                });
+            JsonSerializer.Serialize(self);
     }
 }

test/Integration/ApiGateway/Requests/Extensions.cs

@@ -1,6 +1,6 @@
 using System.Net.Http;
+using System.Text.Json;
 using System.Threading.Tasks;
-using Newtonsoft.Json;
 
 namespace AwsSignatureVersion4.Integration.ApiGateway.Requests
 {
@@ -13,6 +13,6 @@ public static async Task<ReceivedRequest> ReadReceivedRequestAsync(this HttpCont
         }
 
         public static ReceivedRequest DeserializeReceivedRequest(this string self) =>
-            JsonConvert.DeserializeObject<ReceivedRequest>(self);
+            JsonSerializer.Deserialize<ReceivedRequest>(self);
     }
 }