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
.