Code coverage

.github/workflows/run-tests.yml

@@ -7,23 +7,34 @@ jobs:
     strategy:
       matrix:
         node: [ 16, 18 ]
-    name: Tests on Ubuntu with Node ${{ matrix.node }}
+    name: Tests with code coverage on Ubuntu with Node ${{ matrix.node }}
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}
-      - run: npm install
-      - run: npm run compile
+      - run: |
+          npm install
+          npm run compile
+          # runtTests() which downloads/installs/launches VSCode requires a screen.
+          # Using xvfb-run to attach a virtual screen for CI running on Ubuntu.
+          xvfb-run --server-num=99 --server-args="-screen 0 1024x768x24" npm run test-coverage
+        shell: bash
+      - run: killall Xvfb || true
   run-tests-win:
     runs-on: windows-latest
     strategy:
       matrix:
         node: [ 16, 18 ]
-    name: Tests on Windows with Node ${{ matrix.node }}
+    name: Tests with code coverage on Windows with Node ${{ matrix.node }}
     steps:
       - uses: actions/checkout@v3
       - uses: actions/setup-node@v3
         with:
           node-version: ${{ matrix.node }}
-      - run: npm install
+      - run: |
+          # On Windows there no need for a screen for runTests() to run successfully.
+          npm install
+          npm run compile
+          npm run test-coverage
+      - run: taskkill /IM Xvfb.exe /F || true

.gitignore

@@ -3,3 +3,5 @@ dist
 node_modules
 .vscode-test/
 *.vsix
+coverage/
+.nyc_output/