Manual module mocking

[kuzzmi]

Hi,

I'm trying to migrate existing Node.js JS app to TypeScript. We have a lot of functional tests (not unit tests), where we mock some responses from external APIs.

jest.mock('../../clients/createAPIClient', () => () => ({
  getData: () => ({
    Results: {
      Items: [],
    },
  }),
}));

Now that we're moving our stuff to TypeScript, such mock doesn't work anymore if ran with ts-jest. The runner simply ignores this mock.

Any ideas how to make it work again? Thanks!

[koonfoon]

I am no expert, but maybe you can try this https://dev.to/s2engineers/testing-with-jest-and-typescript-the-tricky-parts-1gnc

[kuzzmi]

Thanks for reply @koonfoon!
I realized that jest was trying to also compiled tests, where those mocks didn't work.
So warning to anyone: make your compiler ignore .spec.ts files :)