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Article to Follow:
https://dev.to/ivadyhabimana/setup-jest-and-react-testing-library-in-a-react-project-a-step-by-step-guide-1mf0
App need to upgrade to version 18 as installing the testing library had some issues.
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Article to Follow to setup testing environment for React app with RTL and jest:
https://dev.to/ivadyhabimana/setup-jest-and-react-testing-library-in-a-react-project-a-step-by-step-guide-1mf0