I have an react native app which has lots of features and now I have to run tests into it

I am looking for a React Native developer to help me run unit tests on my app.

Testing Requirements:
- The project requires unit tests to be run on the app's features.

Testing Environment:
- I do not have a specific testing environment set up and would appreciate recommendations on how to set one up.

Timeline:
- The testing project needs to be completed within 2 days.

Skills and Experience:
- Experience with React Native and unit testing is required.
- Knowledge of testing environments and the ability to provide recommendations is preferred.