Designing Robust Session Management in Distributed Playwright Tests

Описание и применение

Создание уникальных сессий и контекстов браузера для каждого рабочего процесса в распределённых тестах Playwright обеспечивает изоляцию, надёжность и масштабируемость.

Задача

Large-scale Playwright test suites run concurrently across multiple workers and share stateful backend resources, leading to flaky tests and orphaned resources when workers crash or tests fail.

Результат

Per-worker unique session IDs and contexts guarantee isolated test execution, reliable cleanup, and scalable distributed testing.

Рабочий процесс

• Define custom fixtures using test.extend with worker scope.
• Create a sessionId fixture that generates a unique ID before tests run.
• Implement teardown logic after await use() to clean up backend resources.
• Create a sessionContext fixture that configures a BrowserContext with the unique sessionId via headers and cookies.
• Ensure the context is closed after the test completes.
• Use the sessionContext and sessionId in tests to maintain isolation.

Доказательства

Each worker gets a dedicated sessionId and sessionContext, preventing cross-contamination.

Источник

Fixture teardown logic (code after await use()) always runs, ensuring cleanup even if a test fails.

Источник