I've got a test with `runBlockingTest` function. F...

# coroutines

[Maciek]

I've got a test with runBlockingTest function. From this test I'm running code that launches coroutine from MainScope object that is suppose to have TestCoroutineDispatcher but I can't seem to run delay function inside that coroutine because I'm getting UncompletedCoroutinesError exception. Is my test setup wrong or I just can't test a code that has delay functions?
I don't really need that delay but was just wondering why it doesn't work, I thought that runBlocking and TestCoroutineDispatcher will take care of such cases

[Maciek]

I think I've got a problem with junit5 extension (rule in junit4), I'm running the code to replace the dispatcher but that doesn't have desired effect..

[Dennis]

do you have some code to show?

[liminal]

Which runBlockingTest are you using? You may be running into this issue https://craigrussell.io/2019/11/unit-testing-coroutine-suspend-functions-using-testcoroutinedispatcher/

[Maciek]

very nice article, thanks James!

[Maciek]

@Dennis that's the code that fails

Untitled.kt

[Maciek]

oh, it does work correctly with TestCoroutineDispatcher.runBlockingTest but now I can't use my test extension from junit5 because it's not like junit4 rule where you're defining it as a class member

[Maciek]

I can use it in an old fashion way with a class member thanks to @RegisterExtension field, now everything works, thanks!