Has there been talk about managing time of corouti...
# compose-androidv
vide
11/21/2023, 4:30 PMHas there been talk about managing time of coroutines in integrated tests? I would like to manipulate clocks of coroutine schedulers for testing behaviour involving timers (in viewmodels, for example) in a predictable way. I don't want to inject a test scheduler directly because I want to verify UI state before and after delays, but skip them when needed from the test itself. I couldn't find any relevant docs
vide
11/21/2023, 4:31 PMFor example, there's a page with a viewmodel that launches a delay() to a viewModelScope. I want to verify initial UI state, then skip the delay, and then verify the new UI state after changes in the vm.
vide
11/21/2023, 4:32 PMIt seems like the existing test tools are mostly geared towards controlling unit tests
c
Chrimaeon
11/21/2023, 5:49 PMv
vide
11/21/2023, 6:02 PMI think the TestCoroutineScheduler will skip delays automatically though? https://kotlinlang.org/api/kotlinx.coroutines/kotlinx-coroutines-test/kotlinx.coroutines.test/-test-coroutine-scheduler/
Or am I confused about how the coroutine dispatchers/schedulers work?
m
mkrussel
11/21/2023, 7:39 PMThe scheduler can auto skip delays or not. This is the best description I've seen on how it works.
https://github.com/Kotlin/kotlinx.coroutines/issues/1266#issuecomment-504234816
mkrussel
11/21/2023, 7:41 PMNow the main problem I would see is the test dispatchers will probably not run on the main thread, but I don't know if you need that for you integration tests.