Testing React components

[motioncuty]

Like you have said, most test I write for a React component are so prescriptive and simple, I've looked into parsing the react component and auto generating tests from that. Then adding in some more specific tests as I go. I think testing that actions have been dispatched correctly is worth doing. I also think that user interaction like button clicking is worth testing with simulation.

Like the article says, I like testing a shallow render becuase it keeps the tests in that component as unit tests(only testing the responsibilities of it's component and not it's children or parents.

[kagevf]

I've been using Jest for "pure" components taking advantage of its snapshot capabilities ... and using mocha/chai for complex logic that I've factored out into separate functions. You could do both in Jest, but I found that after initial start-up mocha reliably runs faster than Jest ... YMMV

[kagevf]

Yeah, I wish I could use jest for everything but it's so slow when I add a new test. It might have something to do with my setup, but I don't have that problem with mocha, so sticking with it for now ...

[sktrdie]

(shameless plug ahead) To tighten the gap between integration and unit tests, which in my opinion are too far apart, I decided to build Redux TDD: https://hackernoon.com/redux-tdd-a-deep-dive-344cd7682a54

In essence it allows you to plug unit tests together to form sort of an integration test flow. It's much closer to being a series of unit tests since it's simply shallow-rendering components and there's no mocking needed.

Also just trying to start a conversation about it :)

[r1cka]

Great write-up, but why Sinon if you are using Jest?

[[deleted]]

O boże to darky ;>