start

src/setupTests.js

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+// jest-dom adds custom jest matchers for asserting on DOM nodes.
+// allows you to do things like:
+// expect(element).toHaveTextContent(/react/i)
+// learn more: https://github.com/testing-library/jest-dom
+import '@testing-library/jest-dom';
+import Enzyme from 'enzyme';
+import Adapter from '@wojtekmaj/enzyme-adapter-react-17';
+
+Enzyme.configure({adapter: new Adapter()});