Designing a resilient test suite for a high-concurrency, real-time dashboard

Описание и применение

Тесты на высоконагруженной торговой панели стали устойчивыми к временным ошибкам и шуму WebSocket, используя expect.poll() и блокировку лишних запросов.

Задача

Financial dashboard tests fail due to transient “Processing…” flashes and background WebSocket noise, causing flaky assertions of the final stable state.

Результат

Tests become resilient to flaky intermediate states and background noise, achieving reliable assertions of the final dashboard state.

Рабочий процесс

• 1. Use expect.poll() with a custom timeout to repeatedly evaluate the final state and error count.
• 2. In the poll callback, read the order status text and count transient error elements.
• 3. Return an object with status and errors and assert it equals {status:'Success', errors:0}.
• 4. Before performing critical actions, mute background WebSocket noise by routing the feed endpoint and aborting the request.
• 5. Run the test; expect.poll() retries until the condition is met or the timeout expires.

Доказательства

Use expect.poll() with custom timeout + page.route() to mute noise. Assert final state while ignoring intermediate flashes.

Источник