Run test in headless mode within CI

Author: Pokhilenko

.github/workflows/tests.yml

@@ -1,5 +1,8 @@
 name: Playwright Tests
 
+env:
+  CI: true
+
 on:
   push:
     branches:
@@ -16,16 +19,16 @@ jobs:
       - name: Checkout repository
         uses: actions/checkout@v4
 
-      - name: Set up Python (latest)
+      - name: Set up Python (latest stable version)
         uses: actions/setup-python@v4
         with:
-          python-version: 'latest'
+          python-version: '3.11'
 
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt
           playwright install --with-deps
 
-      - name: Run Playwright tests
-        run: pytest tests
+      - name: Run Playwright tests in headless mode
+        run: pytest tests --headless

.gitlab-ci.yml

@@ -23,6 +23,8 @@ setup_and_run_tests:
     paths:
       - .cache/pip  # Cache pip dependencies
       - /ms-playwright  # Cache Playwright browsers
+  variables:
+    CI: "true"
 
 pages:
   stage: pages

conftest.py

@@ -37,7 +37,8 @@ def request_context(
 
 @pytest.fixture(scope="session")
 def browser(playwright):
-    browser = playwright.chromium.launch(headless=False)
+    headless = os.getenv("CI", "false").lower() == "true"  # Headless only in CI
+    browser = playwright.chromium.launch(headless=headless)
     yield browser
     browser.close()