:warning: Remix has now released @remix-run/testing (example tests) which should be used instead of remix-stubs. It has a very similar API so migration is easy. With stubbing now built-in to Remix, remix-stubs won't be updated and only works with older versions of Remix such as <v1.9.

remix-stubs

An example implementation and usage of Ryan Florence's createRemixStub design with Storybook and Vitest.

Examples

• create-remix-stub.tsx for a stub implementation.
• preview.tsx and main.ts for a Storybook 7.0 w/ Vite example.

Tests

• LikeButton.test.tsx for Ryan's Vitest unit testing example.
• new.test.tsx for an initialActionData example.
• login.test.tsx for a login form submission test with vitest mocks to assert the action has been called once.
• $teamId.test.tsx for an example that uses useOutletContext().

Whilst I won't be publishing remix-stubs as a package, since it relies on deep imports from Remix, please do create issues, examples or discussions so that the example implementation can be improved.

Current Issues

There's a few issues and workarounds you will need to be aware of.

Unit Testing

• global.FormData wasn't being set to the jsdom class. Manually set it in setup-test-env.ts.
• happy-dom doesn't support formdata or form submissions so if unit testing those you should set the vitest environment to jsdom in vitest.config.js.
• jsdom's form submission support isn't perfect and won't pass the form submit button's value as documented in LikeButton.tsx.

Storybook

• Due to the deep import of RemixEntry in create-remix-stub.tsx from @remix-run/react, you may find webpack/vite bundles both a esm and cjs version of the components code, which causes React context to be inconsistent. For vite I've added an alias in .storybook/main.ts as a temporary workaround.