Add testing step and upload results to GitHub Actions workflow

Author: Mteheran

.github/workflows/main_apicolombia.yml

@@ -28,6 +28,17 @@ jobs:
       - name: Build with dotnet
         run: dotnet build --configuration Release
 
+      - name: Test with dotnet
+        with:
+          working-directory: ./api.Tests
+        run: dotnet test --no-restore --logger trx --results-directory "TestResults-${{ matrix.dotnet-version }}"
+      
+      - name: Upload dotnet test results
+        uses: actions/upload-artifact@v4
+        with:
+          name: dotnet-results-${{ matrix.dotnet-version }}
+          path: TestResults-${{ matrix.dotnet-version }}
+
       - name: dotnet publish
         run: dotnet publish -c Release -o ${{env.DOTNET_ROOT}}/myapp