are react TestUtils part of the kotlin react wrappers? is there an example for unit testing a react ...

# react

[christophsturm]

are react TestUtils part of the kotlin react wrappers? is there an example for unit testing a react component in kotlin?

[turansky]

are react TestUtils part of the kotlin react wrappers?

Work required

[christophsturm]

thats really suprising, with jetbrains using kotlin and react in internal projects. do you not write tests for your components?

[epabst]

I was looking for this exactly. So sad and surprising.

[epabst]

https://github.com/JetBrains/kotlin-wrappers/issues/67

[christophsturm]

@epabst do you think enzyme is better than the normal react test support?

[epabst]

I don't know. I haven't used any of them. I found this article: https://codeburst.io/revisiting-react-testing-in-2019-ee72bb5346f4

[epabst]

I looked at a few of them, and enzyme seems to have the needed Typescript bindings that Dukat needs. I have got Enzyme converted and compiling. I plan to try it out and if it works ok, to add it to my http://github.com/epabst/kotlin-showcase (not as a library but available to copy to kotlin-wrappers or wherever).

[christophsturm]

it seems that testing-library/react also has typescript definitions: https://www.npmjs.com/package/@types/testing-library__react

[epabst]

I haven't looked into testing-library/react yet, but FWIW, here are functioning bindings for enzyme: https://github.com/epabst/kotlin-showcase/tree/5d5129e556c8b168b0a0b838eec694664af37902/src/jsTest/kotlin/enzyme

[epabst]

Here is an example test: https://github.com/epabst/kotlin-showcase/blob/5d5129e556c8b168b0a0b838eec694664af37902/src/jsTest/kotlin/todo/ToDoScreenTest.kt

[epabst]

I tried to convert @testing-library/react but Dukat didn't handle it very well. It didn't fail, but the code is very degenerate. e.g.

external var act: Any

and

external var within: Any

This is due to https://github.com/Kotlin/dukat/issues/277

[christophsturm]

pretty cool that you got enzyme working!

[christophsturm]

is the enzyme mapping totally autogenerated or did you have to manually fix it?

[epabst]

I had to manually fix it. About 30 minutes worth.