fix: merge coverage reports for SonarCloud (#245)

Signed-off-by: Alan Brault <alan.brault@visus.io>

Author: xaevik

.github/workflows/ci.yml

@@ -56,6 +56,10 @@ jobs:
               if: github.actor != 'dependabot[bot]' && github.actor != 'renovate[bot]'
               run: dotnet tool update dotnet-sonarscanner --tool-path .sonar/scanner
 
+            - name: Install dotnet-coverage tool
+              if: github.actor != 'dependabot[bot]' && github.actor != 'renovate[bot]'
+              run: dotnet tool update dotnet-coverage --global
+
             - name: Begin SonarCloud analysis
               if: github.actor != 'dependabot[bot]' && github.actor != 'renovate[bot]'
               run: |
@@ -64,19 +68,25 @@ jobs:
                     /o:"visus" \
                     /d:sonar.token="$SONAR_TOKEN" \
                     /d:sonar.host.url="https://sonarcloud.io" \
-                    /d:sonar.cs.vscoveragexml.reportsPaths="**/TestResults/**/coverage.xml" \
+                    /d:sonar.cs.vscoveragexml.reportsPaths="coverage.xml" \
                     /d:sonar.cs.vstest.reportsPaths="**/TestResults/**/*.trx"
 
             - name: Build
               run: dotnet build -c Release --no-restore
 
             - name: Run tests
               run: |
-                  dotnet test -c Release --no-build --no-restore \
+                  dotnet test -c Release --no-build --no-restore -- \
                     --coverage \
-                    --coverage-output coverage.xml \
                     --coverage-output-format xml \
-                    -- --report-trx
+                    --report-trx
+
+            - name: Merge coverage reports
+              if: github.actor != 'dependabot[bot]' && github.actor != 'renovate[bot]'
+              run: |
+                  dotnet-coverage merge "tests/**/TestResults/*.xml" \
+                    --output coverage.xml \
+                    --output-format xml
 
             - name: Upload test results
               if: always()