Lately, I’ve been using Sinon.JS for mocking in my unit tests. By using mocks for dependencies inside functions, I can write unit tests that are resilient to a changing codebase. Functions with mocks can also be developed without worrying about the chain of dependencies that could affect the logic inside the functions. Read more on Mocking in JavaScript Unit Tests Using Sinon.JS…
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Never Mix Promises and Callbacks in NodeJS
When using Node.js, you should never mix promises and callbacks. It’s a recipe for confusion. The problem is pretty obvious in hindsight, but it sure threw me for a loop the first time I ran into it.
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Bye-Bye, Sinon – Hello, testdouble
UPDATE: Justin Searls, the author of testdouble.js sent me an email with some notes on this post. I’ve added some his comments below to provide some additional context.
I’ve been working in JavaScript-land for the last little while, writing lots of Node.js code. Since I practice TDD, I’m always trying to keep my eye on the best new ways to test JavaScript code. Read more on Bye-Bye, Sinon – Hello, testdouble…
Speeding Up Your JavaScript Test Suite
Having fast tests is important. Slow running tests slow down development, especially if you’re practicing TDD. If tests are too slow to run, some developers may avoid running them altogether. Slow tests will also slow down CI builds, increasing the length of your feedback loop.
While it takes more development time, doing maintenance on your test suite to ensure it continues to run quickly is an important task that any significant project should prioritize. Read more on Speeding Up Your JavaScript Test Suite…