Designing Robust Session Management in Distributed Playwright Tests

说明与用途

为每个工作进程创建唯一的会话和浏览器上下文，确保 Playwright 分布式测试的隔离性、可靠性和可扩展性。

问题

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.

结果

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

工作流

• 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.

证据

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

来源

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

来源