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.