fix(e2e-tests): use pyppeteer bundled Chromium in containerized_chrome job

.github/workflows/e2e-tests.yml

@@ -10,9 +10,9 @@
 # Note: Faster subset of aria-tests.yml, runs on all changes
 # =============================================================================
 
 name: E2E + Integration Tests
 
 on:
   push:
     branches: [main]
   pull_request:
@@ -203,7 +203,7 @@
         # cspell:ignore libxss libgtk libasound libnss libatk libgbm libx
         run: |
           apt-get update
           apt-get install -y wget gnupg ca-certificates xz-utils fonts-liberation libgtk-3-0 libxss1 libasound2 libnss3 libatk-bridge2.0-0 libx11-xcb1 libgbm1
       - name: Install Chromium (stable)
         # cspell:ignore elif
         run: |
@@ -234,10 +234,11 @@
           fi
       - name: Install Python test deps
         # cspell:ignore asyncio pyppeteer pytest
-        run: python -m pip install --upgrade pip && python -m pip install pytest pytest-asyncio pyppeteer requests
+        run: |
+          python -m pip install --upgrade pip
+          python -m pip install pytest pytest-asyncio pyppeteer requests
+          python -c "from pyppeteer.chromium_downloader import download_chromium; download_chromium()"
       - name: Start server and run pyppeteer tests
-        env:
-          CHROME_PATH: /usr/bin/chromium
         run: |
           python3 aria_web/server.py > /tmp/aria_server.log 2>&1 &
           READY=0

tests/test_aria_tests_workflow.py

@@ -5,10 +5,25 @@
 import pytest
 
 
+_DOWNLOAD_CMD = 'python -c "from pyppeteer.chromium_downloader import download_chromium; download_chromium()"'
+
+
 @pytest.mark.unit
 def test_pyppeteer_workflow_uses_supported_chromium_download_command() -> None:
     workflow_path = Path(__file__).resolve().parents[1] / ".github" / "workflows" / "aria-tests.yml"
     content = workflow_path.read_text(encoding="utf-8")
 
     assert "python -m pyppeteer install" not in content
-    assert 'python -c "from pyppeteer.chromium_downloader import download_chromium; download_chromium()"' in content
+    assert _DOWNLOAD_CMD in content
+
+
+@pytest.mark.unit
+def test_e2e_tests_workflow_uses_pyppeteer_bundled_chromium() -> None:
+    """e2e-tests.yml containerized_chrome job must not try to apt-install chromium."""
+    workflow_path = Path(__file__).resolve().parents[1] / ".github" / "workflows" / "e2e-tests.yml"
+    content = workflow_path.read_text(encoding="utf-8")
+
+    # Must use pyppeteer bundled download — never apt-install chromium-browser (not in Bullseye)
+    assert "chromium-browser" not in content
+    assert "python -m pyppeteer install" not in content
+    assert _DOWNLOAD_CMD in content