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Lem Dulfo
Lem Dulfo

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How to Mock Bugsnag in jest.setup.js

#jest #tutorial #reactnative #testing

If you're testing with Jest, perhaps you already know to add manual mocks in your __mocks__ directory

├── src │ └── index.js ├── __mocks__ │ └── @bugsnag │ └── react-native.js ├── node_modules ├── jest.config.js ├── jest.setup.js └── package.json
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With __mocks__/@bugsnag/react-native.js looking like:

module.exports = { leaveBreadcrumb: jest.fn(), notify: jest.fn(), start: jest.fn(), // other functions you call in your code };
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However, if you already have jest.setup.js, you can mock Bugsnag like this:

// inside jest.setup.js jest.mock("@bugsnag/react-native", () => ({ leaveBreadcrumb: jest.fn(), notify: jest.fn(), start: jest.fn(), // other functions you call in your code })); // other mocked modules
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The two approaches will work, so choose one or the other depending on you or your team's preference or need.

Sources:
Mocking Node modules
jest.mock

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