E2E Testing Patterns

Build reliable, fast, and maintainable end-to-end test suites that provide confidence to ship code quickly and catch regressions before users do.

Use this skill when

• Implementing end-to-end test automation
• Debugging flaky or unreliable tests
• Testing critical user workflows
• Setting up CI/CD test pipelines
• Testing across multiple browsers
• Validating accessibility requirements
• Testing responsive designs
• Establishing E2E testing standards

Do not use this skill when

• You only need unit or integration tests
• The environment cannot support stable UI automation
• You cannot provision safe test accounts or data

Instructions

• Identify critical user journeys and success criteria.
• Build stable selectors and test data strategies.
• Implement tests with retries, tracing, and isolation.
• Run in CI with parallelization and artifact capture.

Safety

• Avoid running destructive tests against production.
• Use dedicated test data and scrub sensitive output.

Resources

• resources/implementation-playbook.md for detailed E2E patterns and templates.