Replace Verify with plain DiffPlex

CONTRIBUTING.md

@@ -5,5 +5,5 @@ No open-source project is going to be successful without contributions. After we
 * The [Pull Request](https://help.github.com/articles/using-pull-requests) is targeted at the `master` branch.
 * The code complies with the [Coding Guidelines for C#](https://csharpcodingguidelines.com/).
 * The changes are covered by a new or existing set of unit tests which follow the Arrange-Act-Assert syntax such as is used [in this example](https://github.com/fluentassertions/fluentassertions/blob/daaf35b9b59b622c96d0c034e8972a020b2bee55/Tests/FluentAssertions.Shared.Specs/BasicEquivalencySpecs.cs#L33).
-* If the contribution changes the public API, the changes needs to be included by running [`AcceptApiChanges.ps1`](https://github.com/fluentassertions/fluentassertions.json/tree/master/AcceptApiChanges.ps1)/[`AcceptApiChanges.sh`](https://github.com/fluentassertions/fluentassertions/tree/master/AcceptApiChanges.sh) or using Rider's [Verify Support](https://plugins.jetbrains.com/plugin/17240-verify-support) plug-in.
+* If the contribution changes the public API, the changes needs to be included by running [`AcceptApiChanges.ps1`](https://github.com/fluentassertions/fluentassertions.json/tree/master/AcceptApiChanges.ps1)/[`AcceptApiChanges.sh`](https://github.com/fluentassertions/fluentassertions/tree/master/AcceptApiChanges.sh).
 * If the contribution affects the documentation, please update the [**readme.md**](https://github.com/fluentassertions/fluentassertions.json/tree/master/readme.md).

Tests/Approval.Tests/ApiApproval.cs

@@ -2,36 +2,31 @@
 using System.Linq;
 using System.Reflection;
 using System.Runtime.CompilerServices;
-using System.Threading.Tasks;
+using System.Text;
 using System.Xml.Linq;
 using System.Xml.XPath;
+using DiffPlex.DiffBuilder;
+using DiffPlex.DiffBuilder.Model;
 using PublicApiGenerator;
-using VerifyTests;
-using VerifyTests.DiffPlex;
-using VerifyXunit;
 using Xunit;
 
 namespace Approval.Tests;
 
 public class ApiApproval
 {
-    static ApiApproval() => VerifyDiffPlex.Initialize(OutputType.Minimal);
-
     [Theory]
     [ClassData(typeof(TargetFrameworksTheoryData))]
-    public Task ApproveApi(string framework)
+    public void ApproveApi(string framework)
     {
         var configuration = typeof(ApiApproval).Assembly.GetCustomAttribute<AssemblyConfigurationAttribute>()!.Configuration;
         var assemblyFile = CombinedPaths("Src", "FluentAssertions.Json", "bin", configuration, framework, "FluentAssertions.Json.dll");
         var assembly = Assembly.LoadFile(assemblyFile);
         var publicApi = assembly.GeneratePublicApi(options: null);
+        var expected = GetExpected(publicApi, framework);
+
+        var diff = InlineDiffBuilder.Diff(expected, publicApi);
 
-        return Verifier
-            .Verify(publicApi)
-            .ScrubLinesContaining("FrameworkDisplayName")
-            .UseDirectory(Path.Combine("ApprovedApi", "FluentAssertions.Json"))
-            .UseFileName(framework)
-            .DisableDiff();
+        Assert.False(diff.HasDifferences, StringifyDiff(diff));
     }
 
     private class TargetFrameworksTheoryData : TheoryData<string>
@@ -50,4 +45,41 @@ private static string GetSolutionDirectory([CallerFilePath] string path = "") =>
 
     private static string CombinedPaths(params string[] paths) =>
         Path.GetFullPath(Path.Combine(paths.Prepend(GetSolutionDirectory()).ToArray()));
+
+    private string GetExpected(string publicApi, string targetFramework, [CallerFilePath] string path = "")
+    {
+        var projectPath = Path.Combine(Path.GetDirectoryName(path)!, "ApprovedApi", "FluentAssertions.Json");
+        var receivedPath = Path.Combine(projectPath, $"{targetFramework}.received.txt");
+        var verifiedPath = Path.Combine(projectPath, $"{targetFramework}.verified.txt");
+
+        File.WriteAllText(receivedPath, publicApi);
+        return File.Exists(verifiedPath) ? File.ReadAllText(verifiedPath) : string.Empty;
+    }
+
+    private static string StringifyDiff(DiffPaneModel diff)
+    {
+        var builder = new StringBuilder();
+        if (diff.HasDifferences)
+        {
+            foreach (var line in diff.Lines)
+            {
+                switch (line.Type)
+                {
+                    case ChangeType.Inserted:
+                        builder.Append("+ ");
+                        break;
+                    case ChangeType.Deleted:
+                        builder.Append("- ");
+                        break;
+                    default:
+                        // omit unchanged files
+                        continue;
+                }
+
+                builder.AppendLine(line.Text);
+            }
+        }
+
+        return builder.ToString();
+    }
 }

Tests/Approval.Tests/Approval.Tests.csproj

@@ -5,6 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="DiffPlex" Version="1.9.0" />
     <PackageReference Include="FluentAssertions" Version="8.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageReference Include="xunit" Version="2.9.3" />
@@ -13,8 +14,6 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
     <PackageReference Include="PublicApiGenerator" Version="11.5.4" />
-    <PackageReference Include="Verify.DiffPlex" Version="3.1.2" />
-    <PackageReference Include="Verify.Xunit" Version="31.12.5" />
   </ItemGroup>
 
 </Project>

Tests/Approval.Tests/ApprovedApi/FluentAssertions.Json/net47.verified.txt

@@ -1,4 +1,5 @@
-[assembly: System.Reflection.AssemblyMetadata("RepositoryUrl", "https://github.com/fluentassertions/fluentassertions.json.git")]
+[assembly: System.Reflection.AssemblyMetadata("RepositoryUrl", "https://github.com/fluentassertions/fluentassertions.json.git")]
+[assembly: System.Runtime.Versioning.TargetFramework(".NETFramework,Version=v4.7", FrameworkDisplayName=".NET Framework 4.7")]
 namespace FluentAssertions.Json
 {
     public interface IJsonAssertionOptions<T>

Tests/Approval.Tests/ApprovedApi/FluentAssertions.Json/netstandard2.0.verified.txt

@@ -1,4 +1,5 @@
-[assembly: System.Reflection.AssemblyMetadata("RepositoryUrl", "https://github.com/fluentassertions/fluentassertions.json.git")]
+[assembly: System.Reflection.AssemblyMetadata("RepositoryUrl", "https://github.com/fluentassertions/fluentassertions.json.git")]
+[assembly: System.Runtime.Versioning.TargetFramework(".NETStandard,Version=v2.0", FrameworkDisplayName=".NET Standard 2.0")]
 namespace FluentAssertions.Json
 {
     public interface IJsonAssertionOptions<T>