React Facade: Dependency injection for React hooks

React Facade: Dependency injection for React hooks(github.com)

2 points by gabes 4 years ago | 4 comments

Etheryte 4 years ago |

I'm not sure I see the benefits here. Given you're already testing your hooks, as is assumed in the guide, what benefit does this approach have over mocking the hook for component tests?

gabes 4 years ago | |

Yeah that’s fair. Not sure about you, but in the past I’ve struggled with keeping Jest module-level mocks in sync with their actual interface. Was playing around with how I could get around it and this is something I came up with.

Etheryte 4 years ago | | |

Keeping mocks and tests in general up to date with reality can be tricky for sure. One thing that works very well for me, since you're using Typescript, is to use the ReturnType [0] generic to make sure the mock matches up to the actual implementation.

[0] https://www.typescriptlang.org/docs/handbook/utility-types.h...