Building Blockchain Projects

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 ...