Testing Local Backend

Alternatively to convex-test you can test your functions using the open-source version of the Convex backend.

Getting Started

Follow this guide for the instructions.

Compared to convex-test, which uses a JS mock of the backend, running your tests against the real backend has these advantages:

• Your tests will run against the same code as your Convex production (as long you keep the local backend up-to-date).
• Limits on argument, data, query sizes are enforced.
• You can bootstrap a large test dataset from a snapshot import.
• You can test your client code in combination with your backend logic.

Limitations

Note that testing against the local backend also has some drawbacks:

• It requires setting up the local backend, which is more involved.
• No control over time and any scheduled functions will run as scheduled.
• Crons will also run unless disabled via IS_TEST.
• No way to mock fetch calls.
• No way to mock dependencies or parts of the codebase.
• No way to control randomness (tests may not be deterministic).
• No way to set environment variable values from within tests.

To test your functions in JS with a mocked Convex backend, check out convex-test.

CI

See Continuous Integration to run your tests on a shared remote machine.