Unit testing golang code using wails pkg.

[fvilpoix]

I'm trying to write a unit test of a function which has a runtime.EventsEmit(*ctxPtr, "progress", 1) inside.

The function is initially called from wails App, so the wails context is easily available, but in the unit test, no app is created.

if I try to run the test giving a basic context.Background(), I got this error:

2024/07/03 16:24:59 cannot call 'github.com/wailsapp/wails/v2/pkg/runtime.EventsEmit': An invalid context was passed. This method requires the specific context given in the lifecycle hooks:
https://wails.io/docs/reference/runtime/intro

I have looked at the internal code of wails to understand how it works, but I cannot create any mock of the context because it uses frontend.Events, which is internal, and golang refuses to compile it.

Has someone already got this problem, and did he success to fix it?

How do you write your unit tests for this kind of code?