Add MemberNotNullWhen annotation for Content / HasContent pair (#1779)

* Add MemberNotNullWhen annotation for Content / HasContent pair

* Add missing using statement

* Update API Tests

Bump Version due to API change

---------

Co-authored-by: Chris Pulman <chris.pulman@yahoo.com>

Author: hansmbakker

Directory.Build.props

@@ -36,7 +36,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="'$(IsTestProject)' != 'true'">
-    <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.10.48" PrivateAssets="All" />
+    <PackageReference Include="Microsoft.VisualStudio.Threading.Analyzers" Version="17.11.20" PrivateAssets="All" />
   </ItemGroup>
 
   <ItemGroup>

Refit.GeneratorTests/Refit.GeneratorTests.csproj

@@ -20,7 +20,7 @@
         <PackageReference Include="System.Collections.Immutable" Version="9.0.0-preview.5.24306.7" />
         <PackageReference Include="Verify.DiffPlex" Version="3.1.0" />
         <PackageReference Include="Verify.SourceGenerators" Version="2.3.0" />
-        <PackageReference Include="Verify.Xunit" Version="22.11.5" />
+        <PackageReference Include="Verify.Xunit" Version="26.2.0" />
         <PackageReference Include="System.Reactive" Version="6.0.1" />
         <PackageReference Include="Microsoft.AspNetCore.WebUtilities" Version="2.2.0" />
         <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.9.2" />

Refit.GeneratorTests/ReturnTypeTests.cs

@@ -1,6 +1,5 @@
-namespace Refit.GeneratorTests;
+namespace Refit.GeneratorTests;
 
-[UsesVerify]
 public class ReturnTypeTests
 {
     [Fact]

Refit.Tests/API/ApiApprovalTests.Refit.DotNet6_0.verified.txt

@@ -18,6 +18,8 @@ namespace Refit
         protected ApiException(string exceptionMessage, System.Net.Http.HttpRequestMessage message, System.Net.Http.HttpMethod httpMethod, string? content, System.Net.HttpStatusCode statusCode, string? reasonPhrase, System.Net.Http.Headers.HttpResponseHeaders headers, Refit.RefitSettings refitSettings, System.Exception? innerException = null) { }
         public string? Content { get; }
         public System.Net.Http.Headers.HttpContentHeaders? ContentHeaders { get; }
+        [System.Diagnostics.CodeAnalysis.MemberNotNullWhen(true, "Content")]
+        [get: System.Diagnostics.CodeAnalysis.MemberNotNullWhen(true, "Content")]
         public bool HasContent { get; }
         public System.Net.Http.Headers.HttpResponseHeaders Headers { get; }
         public System.Net.Http.HttpMethod HttpMethod { get; }

Refit.Tests/API/ApiApprovalTests.Refit.DotNet8_0.verified.txt

@@ -18,6 +18,8 @@ namespace Refit
         protected ApiException(string exceptionMessage, System.Net.Http.HttpRequestMessage message, System.Net.Http.HttpMethod httpMethod, string? content, System.Net.HttpStatusCode statusCode, string? reasonPhrase, System.Net.Http.Headers.HttpResponseHeaders headers, Refit.RefitSettings refitSettings, System.Exception? innerException = null) { }
         public string? Content { get; }
         public System.Net.Http.Headers.HttpContentHeaders? ContentHeaders { get; }
+        [System.Diagnostics.CodeAnalysis.MemberNotNullWhen(true, "Content")]
+        [get: System.Diagnostics.CodeAnalysis.MemberNotNullWhen(true, "Content")]
         public bool HasContent { get; }
         public System.Net.Http.Headers.HttpResponseHeaders Headers { get; }
         public System.Net.Http.HttpMethod HttpMethod { get; }

Refit/ApiException.cs

@@ -1,4 +1,5 @@
-using System.Net;
+using System.Diagnostics.CodeAnalysis;
+using System.Net;
 using System.Net.Http;
 using System.Net.Http.Headers;
 
@@ -53,6 +54,9 @@ public class ApiException : Exception
         /// <summary>
         /// Does the response have content?
         /// </summary>
+        #if NET6_0_OR_GREATER
+        [MemberNotNullWhen(true, nameof(Content))]
+        #endif
         public bool HasContent => !string.IsNullOrWhiteSpace(Content);
 
         /// <summary>

version.json

@@ -1,5 +1,5 @@
 {
-  "version": "7.1.2",
+  "version": "7.2.0",
   "publicReleaseRefSpec": [
     "^refs/heads/main$", // we release out of main
     "^refs/heads/rel/v\\d+\\.\\d+" // we also release branches starting with vN.N