I ve got a test with `runBlockingTest` function From this te kotlinlang #coroutines

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Title

m

Maciek

03/25/2020, 8:08 PM

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

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..

d

Dennis

03/25/2020, 9:31 PM

do you have some code to show?

l

liminal

03/26/2020, 1:47 AM

Which

runBlockingTest

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

👍 1

m

Maciek

03/26/2020, 6:25 AM

very nice article, thanks James!

@Dennis that's the code that fails

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

I can use it in an old fashion way with a class member thanks to

@RegisterExtension

field, now everything works, thanks!

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