Learning Node.js Development

Setting up spies assertions

Next up, we can set up a series of assertions using expect's spies assertions by heading over to the browser and going to the expect documentation, mjackson expect (https://github.com/mjackson/expect).

On this page, we can scroll down to the spies section, where they talk about all the assertions we have access to. We should start seeing spies in the method names, and that's when we know we've gotten there:

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As shown in the previous code, we have the toHaveBeenCalled function and this is our first assertion with spies. We can assert that our spy was indeed called. Inside Atom, we'll do that by calling expect ...