Replace Verify with plain DiffPlex

.editorconfig

@@ -393,7 +393,7 @@ dotnet_diagnostic.MA0047.severity = none
 # Use an overload of 'GetHashCode' that has a StringComparison parameter
 dotnet_diagnostic.MA0074.severity = none
 
-# Verify settings
+# Approval.Tests settings
 [*.{received,verified}.txt]
 charset = utf-8-bom
 end_of_line = lf

.gitattributes

@@ -64,5 +64,5 @@
 #*.rtf   diff=astextplain
 #*.RTF   diff=astextplain
 
-# Verify settings
+# Approval.Tests settings
 *.verified.txt text eol=lf working-tree-encoding=UTF-8

.github/dependabot.yml

@@ -19,7 +19,6 @@ updates:
       xunit:
         patterns:
           - "xunit*"
-          - "Verify*"
       nuke:
         patterns:
           - "Nuke*"

CONTRIBUTING.md

@@ -72,7 +72,7 @@ Please do:
 * Ensure that 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).
   * Also the code coverage reported by the coveralls must be non-decreasing unless accepted by the authors.
 * If the contribution adds a feature or fixes a bug, please update the [**release notes**](https://github.com/fluentassertions/fluentassertions/blob/develop/docs/_pages/releases.md), which is published on the [website](https://fluentassertions.com/releases).
-* If the contribution changes the public API, the changes needs to be included by running [`AcceptApiChanges.ps1`](https://github.com/fluentassertions/fluentassertions/tree/develop/AcceptApiChanges.ps1)/[`AcceptApiChanges.sh`](https://github.com/fluentassertions/fluentassertions/tree/develop/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/tree/develop/AcceptApiChanges.ps1)/[`AcceptApiChanges.sh`](https://github.com/fluentassertions/fluentassertions/tree/develop/AcceptApiChanges.sh).
 
 Please do not:
 

README.md

@@ -42,9 +42,9 @@ This package is shipped as a [NuGet package](https://www.nuget.org/packages/Flue
 You can either build the solution using Visual Studio or Rider, or use the `build.ps1` script to kick-off the [Nuke](https://nuke.build/) build process. This will build the package and run all tests.
 
 ## Approval Tests
-This is a special set of tests that use the [Verify](https://github.com/VerifyTests/Verify) project to verify whether you've introduced any breaking changes in the public API of the library.
+This is a special set of tests that use the [PublicApiGenerator](https://github.com/PublicApiGenerator/PublicApiGenerator) and [DiffPlex](https://github.com/mmanela/diffplex) projects to verify whether you've introduced any breaking changes in the public API of the library.
 
-If you've verified the changes and decided they are valid, you can accept them  using `AcceptApiChanges.ps1` or `AcceptApiChanges.sh`. Alternatively, you can use the [Verify Support](https://plugins.jetbrains.com/plugin/17240-verify-support) plug-in to compare the changes and accept them right from inside Rider. See also the [Contribution Guidelines](CONTRIBUTING.md).
+If you've verified the changes and decided they are valid, you can accept them  using `AcceptApiChanges.ps1` or `AcceptApiChanges.sh`. See also the [Contribution Guidelines](CONTRIBUTING.md).
 
 
 # Usage

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.DataSets", "bin", configuration, framework, "FluentAssertions.DataSets.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.DataSets"))
-            .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.DataSets");
+        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

@@ -6,13 +6,11 @@
   </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.v3.core" Version="4.0.1" />
     <PackageReference Include="PublicApiGenerator" Version="11.5.4" />
-    <PackageReference Include="Verify.DiffPlex" Version="[3.3.1]" />
-    <!-- See OSMF terms before upgrading: https://github.com/VerifyTests/Verify#open-source-maintenance-fee -->
-    <PackageReference Include="Verify.XunitV3" Version="[32.0.1,33.0.0)" />
+    <PackageReference Include="xunit.v3" Version="4.0.1" />
   </ItemGroup>
 
   <ItemGroup>

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

@@ -1,7 +1,8 @@
-[assembly: FluentAssertions.CustomAssertionsAssembly]
+[assembly: FluentAssertions.CustomAssertionsAssembly]
 [assembly: FluentAssertions.Extensibility.AssertionEngineInitializer(typeof(FluentAssertions.DataSets.InitializeDataSetSupport), "Initialize")]
 [assembly: System.Reflection.AssemblyMetadata("RepositoryUrl", "https://github.com/fluentassertions/fluentassertions.datasets")]
 [assembly: System.Runtime.CompilerServices.InternalsVisibleTo(@"FluentAssertions.DataSets.Specs, PublicKey=00240000048000009400000006020000002400005253413100040000010001002d25ff515c85b13ba08f61d466cff5d80a7f28ba197bbf8796085213e7a3406f970d2a4874932fed35db546e89af2da88c194bf1b7f7ac70de7988c78406f7629c547283061282a825616eb7eb48a9514a7570942936020a9bb37dca9ff60b778309900851575614491c6d25018fadb75828f4c7a17bf2d7dc86e7b6eafc5d8f")]
+[assembly: System.Runtime.Versioning.TargetFramework(".NETFramework,Version=v4.7", FrameworkDisplayName=".NET Framework 4.7")]
 namespace FluentAssertions
 {
     public static class AssertionExtensions

Tests/Approval.Tests/ApprovedApi/FluentAssertions.DataSets/net6.0.verified.txt

@@ -1,7 +1,8 @@
-[assembly: FluentAssertions.CustomAssertionsAssembly]
+[assembly: FluentAssertions.CustomAssertionsAssembly]
 [assembly: FluentAssertions.Extensibility.AssertionEngineInitializer(typeof(FluentAssertions.DataSets.InitializeDataSetSupport), "Initialize")]
 [assembly: System.Reflection.AssemblyMetadata("RepositoryUrl", "https://github.com/fluentassertions/fluentassertions.datasets")]
 [assembly: System.Runtime.CompilerServices.InternalsVisibleTo(@"FluentAssertions.DataSets.Specs, PublicKey=00240000048000009400000006020000002400005253413100040000010001002d25ff515c85b13ba08f61d466cff5d80a7f28ba197bbf8796085213e7a3406f970d2a4874932fed35db546e89af2da88c194bf1b7f7ac70de7988c78406f7629c547283061282a825616eb7eb48a9514a7570942936020a9bb37dca9ff60b778309900851575614491c6d25018fadb75828f4c7a17bf2d7dc86e7b6eafc5d8f")]
+[assembly: System.Runtime.Versioning.TargetFramework(".NETCoreApp,Version=v6.0", FrameworkDisplayName=".NET 6.0")]
 namespace FluentAssertions
 {
     public static class AssertionExtensions