jest-marbles
A set of helper functions and Jest matchers for RxJS marble testing, making reactive code testing easy and clear.
What is jest-marbles?
jest-marbles is a helper library for testing RxJS observables using marble diagram syntax within Jest. It provides custom matchers and utilities to verify observable emissions, subscriptions, and side effects in a clear, visual way. The library solves the problem of writing verbose and error-prone tests for reactive streams by leveraging intuitive marble strings.
Developers working with RxJS who need to write unit tests for reactive code using Jest. It's particularly useful for those familiar with marble testing syntax and looking to integrate it seamlessly into their Jest test suites.
Developers choose jest-marbles because it reduces boilerplate, provides readable test assertions with marble diagrams, and offers detailed, visual error messages when tests fail. Its tight integration with Jest and support for TypeScript make it a robust choice for testing complex reactive workflows.
Overview
Helpers library for marbles testing with Jest
Use Cases
Best For
- Testing RxJS observables with marble diagram syntax in Jest
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