create-react-app Has A Default Test Setup File

In Configure Jest To Run A Test Setup File, I pointed to a way of configuring Jest in either the package.json or jest.config.js file with the setupTestFrameworkScriptFile value.

In a create-react-app project, this is not an option because setupTestFrameworkScriptFile is not one of the permitted config values for Jest.

There is a built-in value which happens to match what was recommended in the above post -- <rootDir>src/setupTests.js.

This means that there is no configuration required. Instead, just create a setupTests.js file in the src directory of your CRA project and add any framework setup you need there. That file is already configured to run when you invoke yarn test.

source

Last updated