Testing with Mocha
The problem we're facing is that we must ensure the quality of our software without increasing the amount of manual testing. It isn't possible to recheck every feature of our software when new updates are released. To solve this problem, we're going to use Mocha, which is a JavaScript testing framework that is used to run a series of asynchronous tests. If all the tests pass successfully, your application is OK and can get released to production.
Many developers follow the test-driven development (TDD) approach. Often, when you implement tests for the first time, they fail because the business logic that's being tested is missing. After implementing all the tests, we have to write the actual application code to meet the requirements of the tests. In this book, we haven't followed this approach, but it isn't a problem as we can implement tests afterward too. Typically, I tend to write tests in parallel with the application code.
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