September 2018
Intermediate to advanced
764 pages
20h 6m
English
Content preview from Building Enterprise JavaScript Applications
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Adding test coverage
At the beginning of our TDD process, we wrote E2E tests first and used them to drive development. However, for unit and integration tests, we actually retrofitted them back into our implementation. Therefore, it's very likely that we missed some scenarios that we should have tested for.
To remedy this practical problem, we can summon the help of test coverage tools. A test coverage tool will run your tests and record all the lines of code that were executed; it will then compare this with the total number of lines in your source file to return a percentage coverage. For example, if my module contains 100 lines of code, and my tests only ran 85 lines of my module code, then my test coverage is 85%. This may mean that I ...
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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.