Install additional dependencies in workflow to support pyqtgraph

.github/workflows/tests.yml

@@ -35,6 +35,8 @@ jobs:
       fail-fast: false
       matrix:
         python-version: ['3.9', '3.10', '3.11', '3.12']
+    env:
+      DISPLAY: ':99.0'
     steps:
       - name: Checkout
         uses: actions/checkout@v3
@@ -46,6 +48,12 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
         run: poetry install --with test --all-extras
+      - name: Install pyqtgraph dependencies
+        # https://pytest-qt.readthedocs.io/en/latest/troubleshooting.html#github-actions
+        run: |
+          sudo apt-get update
+          sudo apt install libxkbcommon-x11-0 libxcb-icccm4 libxcb-image0 libxcb-keysyms1 libxcb-randr0 libxcb-render-util0 libxcb-xinerama0 libxcb-xfixes0 x11-utils
+          /sbin/start-stop-daemon --start --quiet --pidfile /tmp/custom_xvfb_99.pid --make-pidfile --background --exec /usr/bin/Xvfb -- :99 -screen 0 1920x1200x24 -ac +extension GLX
       - name: Run tests
         run: poetry run pytest