How do you perform parallel test execution in Playwright?
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How do you perform parallel test execution in Playwright?
How Parallel Test Execution Works in Playwright
Default Parallel Execution:
Playwright test runner supports parallel execution by default. Tests are distributed across multiple threads (workers) based on the number of CPU cores available.
Worker Configuration:
You can customize the number of parallel workers through the test configuration settings. Adjusting the number of workers ensures optimal resource utilization.
Independent Test Structure:
Tests must be designed to be independent, avoiding shared states or resource conflicts to ensure reliable parallel execution.
Sharding for Large Test Suites:
Tests can be split into smaller chunks (shards), allowing manageable execution and balancing workloads.
Browser Context Isolation:
Each test is executed in its own isolated browser context, which eliminates shared state issues and ensures faster execution.
Multiple Browser Projects:
Tests can be run across different browsers (e.g., Chrome, Firefox, Webkit), further leveraging parallel capabilities.
Debugging Parallel Tests:
During debugging, parallel execution can be disabled to focus on specific test issues, ensuring stability before scaling execution.
Parallel execution in Playwright enhances efficiency by running multiple tests concurrently while maintaining robustness and reliability. Let me know if you'd like further insights!
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