Testing components

[carlesba]

How can you test a component that uses a Constate Container?

I've found some issues testing child-as-function with Enzyme. Do you have any strategy for it?

[diegohaz]

Hey, @carlesba.

My approach is usually to not test presentational components. Even at Facebook they don't do as much, as Dan said on this Q&A:

Personally I don't find unit testing components very valuable. Especially if they just contain markup — you're basically testing that React works, and we have tests in React itself for that. I think some combination of integration tests for higher-level UI scenarios (click a button, something shows up) and unit tests for logic (e.g. complex calculations) is helpful. I'm more skeptical of asserting on component output although I understand others might not agree.

If this is about components, I’ll reiterate we don’t do that much unit testing of components at Facebook.

I particularly didn't have problems on testing render props with Enzyme. They currently don't support the new Context API though (the PR was merged, but not yet released).

What I highly recommend you to do is testing containers or using react-testing-library instead of Enzyme.