August 2016
Intermediate to advanced
635 pages
14h 5m
English
book
JavaScript: Functional Programming for JavaScript Developers
by Ved Antani, Simon Timms, Dan Mantyla
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Stubs
A stub is another example of a fake object. We can use stubs when we have some dependencies in the subject under test that need to be satisfied with an object that returns a value. They can also be used to provide a bulkhead to stop computationally expensive or I/O reliant functions from being run.
Stubs can be implemented in much the same way that we implemented spies. We just need to intercept the call to the method and replace it with a version that we wrote. However, with stubs we actually don't call the replaced function. It can be useful to keep the replaced function around just in case we need to restore the functionality of the stubbed out class.
Let's start with an object that depends on another object for part of its functionality: ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.