Automated Visual Testing & Screenshots

Ensuring Quality with Automated Visual Verification

As part of our commitment to robust operations, we have implemented an automated screenshot service to verify the health and visual integrity of our deployments.

The Challenge

Ensuring that complex, containerized applications like Mozilla Hubs are not only “up” (responding to pings) but also visually correct and functional for end-users.

The Solution

We developed a lightweight, Dockerized screenshot-service utilizing Puppeteer. This service automatically: 1. Navigates to critical application endpoints (Admin Console, Client Landing Page). 2. Verifies HTTP response status codes and page titles to ensure the correct application state. 3. Captures high-resolution full-page screenshots for visual auditing.

Key Benefits

• Immediate Feedback: Instantly confirm that UI changes or backend updates haven’t broken the frontend experience.
• Visual Documentation: Automatically generate visual artifacts of the system state for reports or debugging.
• Containerized Reliability: Runs consistently in any Docker environment, independent of the host OS configuration.

This automated verification step reduces manual testing time and increases confidence in every deployment.