Experiment with using TUnit instead of xUnit

Remaining issues

* GitHub action: how to replace GitHubActionsTestLogger? See microsoft/testfx#4365
* HTML logger: could not find an equivalent for Microsoft.Testing.Platform
* Stryker: currently not supported for Microsoft.Testing.Platform, see stryker-mutator/stryker-net#3094

.github/workflows/continuous-integration.yml

@@ -63,7 +63,7 @@ jobs:
         if: matrix.os == 'ubuntu-latest' && env.CODECOV_TOKEN != ''
         uses: codecov/codecov-action@v4
         with:
-          files: coverage/*/coverage.cobertura.xml
+          files: coverage/*/*.cobertura.xml
           token: ${{ env.CODECOV_TOKEN }}
       - name: ☂️ Upload coverage report to Codacy
         env:
@@ -72,7 +72,7 @@ jobs:
         uses: codacy/codacy-coverage-reporter-action@v1
         with:
           project-token: ${{ env.CODACY_PROJECT_TOKEN }}
-          coverage-reports: coverage/*/coverage.cobertura.xml
+          coverage-reports: coverage/*/*.cobertura.xml
       - name: 📦 Create NuGet package
         run: dotnet pack --no-build --output .
       - name: 📤 Upload NuGet package artifact
@@ -84,7 +84,7 @@ jobs:
       - name: 👽 Run mutation tests and upload report to Stryker dashboard
         env:
           STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
-        if: matrix.os == 'ubuntu-latest' && env.STRYKER_DASHBOARD_API_KEY != ''
+        if: matrix.os == 'DISABLED' && env.STRYKER_DASHBOARD_API_KEY != ''
         run: |
           dotnet tool restore
           dotnet tool run dotnet-stryker --reporter dashboard --open-report:dashboard --version ${GITHUB_REF_NAME} --dashboard-api-key ${{ env.STRYKER_DASHBOARD_API_KEY }}

tests/IndentationSettingsTest.cs

@@ -1,16 +1,15 @@
 using System;
 using FluentAssertions;
-using Xunit;
 
 namespace Serilog.Formatting.Log4Net.Tests;
 
 public class IndentationSettingsTest
 {
-    [Theory]
-    [InlineData(Indentation.Space, 2, "  ")]
-    [InlineData(Indentation.Tab, 2, "\t\t")]
-    [InlineData(Indentation.Space, 4, "    ")]
-    [InlineData(Indentation.Tab, 4, "\t\t\t\t")]
+    [Test]
+    [Arguments(Indentation.Space, (byte)2, "  ")]
+    [Arguments(Indentation.Tab, (byte)2, "\t\t")]
+    [Arguments(Indentation.Space, (byte)4, "    ")]
+    [Arguments(Indentation.Tab, (byte)4, "\t\t\t\t")]
     public void IndentationSettingsToString(Indentation indentation, byte size, string expectedString)
     {
         // Arrange
@@ -23,7 +22,7 @@ public void IndentationSettingsToString(Indentation indentation, byte size, stri
         indentationString.Should().Be(expectedString);
     }
 
-    [Fact]
+    [Test]
     public void InvalidIndentation()
     {
         // Act
@@ -34,7 +33,7 @@ public void InvalidIndentation()
             .Which.Message.Should().StartWith("The value of argument 'indentation' (-1) is invalid for enum type 'Indentation'.");
     }
 
-    [Fact]
+    [Test]
     public void InvalidSize()
     {
         // Act

tests/LineEndingTest.cs

@@ -1,12 +1,11 @@
 using System;
 using FluentAssertions;
-using Xunit;
 
 namespace Serilog.Formatting.Log4Net.Tests;
 
 public class LineEndingTest
 {
-    [Fact]
+    [Test]
     public void InvalidLineEnding()
     {
         Action action = () => _ = new Log4NetTextFormatter(c => c.UseLineEnding((LineEnding)4));