Write the user contract before you write the test file
When AI generates a component, the first risk is that the code solves the wrong problem elegantly. A test suite only helps if you define the user-visible contract first: what the user can do, what they should see, and what must not happen when the data changes.
That contract can be short. For example: the form submits once, disables while pending, shows the latest validation error, and never reuses stale data after the route changes. A one-minute contract prevents an hour of low-value test writing.
Test behavior, not implementation details
AI-generated components often come with extra wrappers, renamed variables, and awkward abstractions. If your tests overfit those internals, you will spend your time updating snapshots instead of catching regressions.
Prefer tests that exercise screen output, button states, loading transitions, and error recovery. Those survive refactors and force the generated code to prove it actually works.
- Assert what the user can see or trigger, not which helper function was called internally.
- Prefer a small number of focused interaction tests over snapshot-heavy coverage that hides logic errors.
- Use realistic mocked data transitions so the component has to survive rerender pressure.
Always hit the async edge cases
Async bugs are where AI-written React code breaks most often. Generated code will commonly forget cancellation, double-submit protection, stale responses, and pending-state cleanup.
Before merging, prove three things: repeated clicks do not create duplicate work, slow responses do not overwrite newer state, and unmounting the component does not leave background updates trying to land on dead UI.
Validate the state boundary
Another common failure mode is putting state in the wrong place. The component works in isolation, but loses sync when a parent rerenders, a route param changes, or the same component instance is reused with new props.
A good test intentionally rerenders with new inputs. If the UI keeps showing stale derived state after a rerender, the AI likely stored what should have been derived.
Use tests to decide whether the generated draft is worth keeping
Not every AI-generated component deserves a cleanup pass. If the behavior tests reveal bad state boundaries, tangled effects, and confused async flow all at once, throw the draft away. Rewriting a small component is often cheaper than defending a weak generated base.
That is the real value of a testing workflow for AI-assisted React work. It helps you decide whether to keep the draft, not just whether to merge it faster.