Last Updated: 2024-11-23

I was writing my first test for cavy an e2e testing tool for React Native. Its API only had a handful of methods, and these seemed insufficient for my testing purposes. E.g. they had pressOn() but I wanted to use a Picker component from React Native, and cavy had no corresponding way to interact with it.

What I should have done look up the Picker object in the React Native docs straight away and noticed that it has certain props, such as onValueChange - then putting 2 + 2 together and realizing that this was a public API I could call. I could have pieced together the interaction in my test without any fancy testing framework: I would just use cavy to get a reference to the component.

const picker = await spec.findComponent('DriverLogin.UsernamePicker')
const username = "jack"
await picker.props.onValueChange(username) // pure React Native

The lesson here, ultimately, is to remember that tests are just regular code - not something special. This regular code should be my primary source for interacting with things in tests.