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21 lines
1000 B
Markdown
21 lines
1000 B
Markdown
# create-react-app Has A Default Test Setup File
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In [_Configure Jest To Run A Test Setup
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File_](https://github.com/jbranchaud/til/blob/master/javascript/configure-jest-to-run-a-test-setup-file.md),
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I pointed to a way of configuring Jest in either the `package.json` or
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`jest.config.js` file with the `setupTestFrameworkScriptFile` value.
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In a `create-react-app` project, this is not an option because
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`setupTestFrameworkScriptFile` is not one of the permitted config values for
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Jest.
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There is a built-in value which happens to match what was recommended in the
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above post -- `<rootDir>src/setupTests.js`.
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This means that there is no configuration required. Instead, just create a
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`setupTests.js` file in the `src` directory of your CRA project and add any
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framework setup you need there. That file is already configured to run when
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you invoke `yarn test`.
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[source](https://github.com/facebook/create-react-app/blob/master/packages/react-scripts/template/README.md#initializing-test-environment)
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