Use Verify instead of Shouldly

Verify automatically supports opening a diff viewer during development and producing an error when running on CI. Also, Verify is configurable through [environment variables][1] to use your preferred diff viewer.

[1]: https://github.com/VerifyTests/DiffEngine/blob/main/docs/diff-tool.order.md

Author: 0xced

test/Serilog.Settings.Configuration.ApprovalTests/ApiApprovalTests.cs

@@ -1,26 +1,14 @@
 using PublicApiGenerator;
 using Serilog.Settings.Configuration;
-using Shouldly;
-using Xunit;
 
+[UsesVerify]
 public class ApiApprovalTests
 {
     [Fact]
-    public void PublicApi_Should_Not_Change_Unintentionally()
+    public Task PublicApi_Should_Not_Change_Unintentionally()
     {
         var assembly = typeof(ConfigurationReaderOptions).Assembly;
-        var publicApi = assembly.GeneratePublicApi(
-            new()
-            {
-                IncludeAssemblyAttributes = false,
-                ExcludeAttributes = new[] { "System.Diagnostics.DebuggerDisplayAttribute" },
-            });
-
-        publicApi.ShouldMatchApproved(options =>
-        {
-            // Comment this line out to view the failure as a diff. Leave it here so that CI builds don't hang when this test fails.
-            options.NoDiff();
-            options.WithFilenameGenerator((_, _, fileType, fileExtension) => $"{assembly.GetName().Name!}.{fileType}.{fileExtension}");
-        });
+        var publicApi = assembly.GeneratePublicApi(new() { IncludeAssemblyAttributes = false });
+        return Verify(publicApi).UseFileName(assembly.GetName().Name!);
     }
 }

test/Serilog.Settings.Configuration.ApprovalTests/Serilog.Settings.Configuration.ApprovalTests.csproj

@@ -6,9 +6,9 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
+    <PackageReference Include="Verify.Xunit" Version="19.12.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.5" PrivateAssets="all" />
     <PackageReference Include="xunit" Version="2.4.2" />
-    <PackageReference Include="Shouldly" Version="4.1.0" />
     <PackageReference Include="PublicApiGenerator" Version="11.0.0" />
   </ItemGroup>