Sep 13, 2018

Here's How-to Easily Add Dependency Injection to Your JavaScript Unit Tests

You probably already know that to do JavaScript testing well, you need to make sure you are testing the following: injecting mocks for other modules, leaking private variables and overriding variables within the module. rewire is a tool for helping test for the above. It provides an easy way to perform dependency injection, plus adds a special setter and getter to modules so you can modify their behaviour. To get started with dependency injection, we’ll create a twitter rest api server and do unit tests using mocks and overriding variables within modules.

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