November 2023
Beginner
196 pages
5h 5m
English
Content preview from Cracking the Data Engineering Interview
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6
Unit Testing
Unit testing is a critical part of a data engineering workflow. It allows the data engineer to test individual units in their code. A unit is any independent piece of code and can be functions, modules, or classes. They will test each unit in isolation to ensure the intended output is returned and functions properly.
Unit testing allows the data engineer to find and fix potential bugs earlier in the development process and also protects their code from breaking when changes are done or their code becomes more complex. It is also more efficient than manual testing.
In this chapter, we will cover fundamental-to-intermediate unit testing concepts in Python you should know for an interview.
In this chapter, we will cover the following ...
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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.