Writing test code

Though discussing and writing test code is outside the scope of this book, it is crucial for developing reliable software. In this section, first we will look at the testing tools available to test the different parts of a MERN application. Then, to help get started with writing test code for the MERN applications developed in this book, we will also discuss a real example of adding a client-side test to the MERN Social application from Chapter 5, Starting with a Simple Social Media Application.

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