Comments on: Functional Programming Unit Testing in Node – Part 1 https://jessewarden.com/2018/06/functional-programming-unit-testing-in-node-part-1.html Software | Fitness | Gaming Mon, 20 Aug 2018 01:24:44 +0000 hourly 1 By: JesterXL https://jessewarden.com/2018/06/functional-programming-unit-testing-in-node-part-1.html/comment-page-1#comment-250899 Mon, 20 Aug 2018 01:24:44 +0000 http://jessewarden.com/?p=5502#comment-250899 Absolutely. As long as it follows the rules of same input, same output, and no side effects.

The side effects, it depends on how strict you are. Typically Promises can wrap side effects, like HTTP calls. So… they technically are affecting the outside world after they are complete, but that’s kind of why we use Promises, so… I say they’re “pure enough”.

]]> By: jmilkiewicz https://jessewarden.com/2018/06/functional-programming-unit-testing-in-node-part-1.html/comment-page-1#comment-250873 Wed, 15 Aug 2018 12:23:06 +0000 http://jessewarden.com/?p=5502#comment-250873 Hey
I really like the post, but i would like to know if function that takes promise as an input can be pure ? Sth like

const incrementWithPromise = promise => promise.then(add(1))

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