8 TESTING WITH THE JEST FRAMEWORK
Whenever you modify your code, you risk causing unforeseen side effects in another part of your application. As a result, guaranteeing the integrity and stability of a code base can be challenging. To do so, developers follow two main strategies.
In the first, an architectural pattern, we split our code into small, self-contained React components. By nature, these components don’t interfere with one another. Hence, changing one shouldn’t lead to any side effects. In the second, we perform automated unit testing, which this chapter covers using the Jest framework.
In the following sections, we discuss the ...
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