switch from FluentAssertions to Shouldly

.gitea/workflows/test-dotnet.yaml

@@ -15,13 +15,19 @@ jobs:
   test:
     runs-on: ubuntu-latest
 
-    steps:
-    - uses: actions/checkout@v3
+    strategy:
+      matrix:
+        dotnet-version: [ '8.x', '9.x' ]
+    env:
+      DOTNET_CLI_TELEMETRY_OPTOUT: 'true'
 
-    - name: Setup .NET
-      uses: https://github.com/actions/setup-dotnet@v3
+    steps:
+    - uses: actions/checkout@v5
+
+    - name: Setup .NET ${{ matrix.dotnet-version }}
+      uses: https://github.com/actions/setup-dotnet@v4
       with:
-        dotnet-version: 9.x
+        dotnet-version: ${{ matrix.dotnet-version }}
 
     - name: Restore dependencies
       run: dotnet restore
@@ -30,12 +36,12 @@ jobs:
       run: dotnet build --no-restore
 
     - name: Test
-      run: dotnet test --no-build --verbosity normal --logger trx --results-directory "TestResults-9.x"
+      run: dotnet test --no-build --verbosity normal --logger trx --results-directory "TestResults-${{ matrix.dotnet-version }}"
 
     - name: Upload dotnet test results
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       with:
-        name: dotnet-results-9.x
-        path: TestResults-9.x
+        name: dotnet-results-${{ matrix.dotnet-version }}
+        path: TestResults-${{ matrix.dotnet-version }}
         if: ${{ always() }}
         retention-days: 30