While working on a project that utilized create-react-app, I came across a file called setupTest.js. This file simply imports @testing-library/jest-dom and extends the expect version in tests with methods like .toBeInTheDocument.
I decided to add the same file, setupTest.js, to my own project but unfortunately it did not have any effect.
In simpler terms, I am curious about how to import @testing-library/jest-dom globally instead of having to do it in each .spec.ts file.
To implement Jest configuration for your project, create a file named jest.config.js. In this file, include the setupFilesAfterEnv property and set it to point to your setupTests.js file location like so:
module.exports = {
setupFilesAfterEnv: ["<rootDir>/app/config/setupTests.js"],
};
Next, within your setupTests.js file, add the following code:
import "@testing-library/jest-dom/extend-expect";
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