Agent skill · software engineering · github
react18-enzyme-to-rtl
Provides exact Enzyme → React Testing Library migration patterns for React 18 upgrades. Use this skill whenever Enzyme tests need to be rewritten - shallow, mount, wrapper.find(), wrapper.simulate(), wrapper.prop(), wrapper.state(), wrapper.instance(), Enzyme configure/Adapter calls, or any test file that imports from enzyme. This skill covers the full API mapping and the philosophy shift from implementation testing to behavior testing. Always read this skill before rewriting Enzyme tests - do not translate Enzyme APIs 1:1, that produces brittle RTL tests.
Why this skill is useful
Provides detailed migration patterns and API mappings for transitioning from Enzyme to React Testing Library, which the AI wouldn't reliably generate on its own.
What it needs
About 2k tokens when loaded. Last updated 2026-08-07. 37,534 stars on the source repository.
What this skill does
React 18 Enzyme → RTL Migration Enzyme has no React 18 adapter and no React 18 support path. All Enzyme tests must be rewritten using React Testing Library. The Philosophy Shift (Read This First) Enzyme tests implementation. RTL tests behavior. This is not a 1:1 translation. Enzyme tests that verify internal state or instance methods don't have RTL equivalents - because RTL intentionally doesn't expose internals. Rewrite the test to assert the visible outcome instead. API Map For complete before/after code for each Enzyme API, read: references/enzyme-api-map.md - full mapping: shallow, mount, find, simulate, prop, state, instance, configure references/async-patterns.md - waitFor, findBy, act(), Apollo MockedProvider, loading states, error states Core Rewrite Template RTL Query Priority (use in this order) 1. getByRole - matches accessible roles (button, textbox, heading, checkbox, etc.) 2. getByLabelText - form fields linked to labels 3. getByPlaceholderText - input placeholders 4. getByText - visible text content 5. getByDisplayValue - current value of input/select/textarea 6. getByAltText - image alt text 7. getByTitle - title attribute 8. getByTestId - data-testid attribute (last resort) Prefer getByRole over getByTestId. It tests accessibility too. Wrapping with Providers
How to use it
Reference it in AdaL, Claude Code, Cursor or any coding agent — nothing to install:
@skills github/react18-enzyme-to-rtl