frontend-test-additions

To add frontend tests that prevent regressions, you implement unit, component, and end-to-end tests using the repository's established patterns. This includes applying mocks and fixtures to validate critical UI states and ensure deterministic test coverage.

The best way to test React component behavior is by establishing unit and component tests using testing-library. This verifies that components render and behave correctly, preventing UI regressions by following the repo's existing test patterns and applying appropriate mocks.

To set up end-to-end testing for user flows, you complement unit tests with integration tests using tools like Playwright or Cypress. This validates complete user journeys and critical UI states by following deterministic testing patterns already established in the repository.

Yes, you can and should use existing repository patterns and mocks for frontend unit testing. The process aligns mocks, fixtures, and test data with repo conventions defined in REPO_PROFILE.json and existing test suites to ensure deterministic results and minimum test coverage.

Frontend component tests fail to produce deterministic results when mocks and fixtures are not properly aligned with repository conventions. To fix this, apply established testing patterns from REPO_PROFILE.json and existing test suites to validate component behavior and ensure stable UI states.

Yes, you need both unit and integration tests to fully validate critical UI states. Establishing at least one unit test for component behavior and one integration test for user flows ensures comprehensive coverage, preventing regressions by following the repository's testing patterns.