April 2017
Intermediate to advanced
266 pages
7h 4m
English
Content preview from Building Blockchain Projects
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Writing tests in JavaScript
Truffle's JavaScript testing framework is built on top of mocha. Mocha is a JavaScript framework to write tests, whereas chai is an assertion library.
Testing frameworks are used to organize and execute tests, whereas assertion libraries provide utilities to verify that things are correct. Assertion libraries make it a lot easier to test your code so you don't have to perform thousands of if statements. Most of the testing frameworks don't have an assertion library included and let the user plug which one they want to use.
Before continuing further, you need to learn how to write tests with mocha and chai. To learn mocha, visit https://mochajs.org/ and to learn chai, visit http://chaijs.com/.
Your tests should ...
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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.
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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.