Top "Ts-jest" questions

How to resolve "Cannot use import statement outside a module" in jest

I have a React application (not using Create React App) built using TypeScript, Jest, Webpack, and Babel. When trying to …

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Cannot find name 'it' in Jest TypeScript

I try to create an intial setup for Jest in React + TypeScript. I have completed the initial setup and try …

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Jest won't transform the module - SyntaxError: Cannot use import statement outside a module

I couldn't get rid of this SyntaxError: Cannot use import statement outside a module error no matter what I have …

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TypeError: Jest: a transform must export a `process` function

Recently upgrading my app to Angular 11. Jest has been set up as the default testing framework. Running npm test results …

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Jest test passed but get Error: connect ECONNREFUSED 127.0.0.1:80 at the end

I'm using node with TypeScript on my back end and jest and supertest as my test framework on my back …

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How to check if a method is called in nested jest mock functions

I have a mock service like below const firebaseService = jest.fn(() => ({ initializeApp: jest.fn(() => { /*do nothing*/}), })) in my …

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How to use jest.spyOn with React function component using Typescript

I am developing a React app using Typescript, and hooks, and I am trying to use Enzyme with Jest to …

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