Reputation: 2346
I am trying to run a test in which I want to wait till higher order function executes. As of now I am not able to figure out any ways to do it. Following is my code.
@Test
fun `test execute routine error`() = runBlocking(coroutineDispatcher) {
val observer = mock<Observer<String>>()
baseViewModel.error.observeForever(observer)
val httpException = HttpException(Response.error<String>(402, mock(ResponseBody::class.java)))
val function = baseViewModel.executeRoutine {
throw httpException
}
verify(observer).onChanged("Something went wrong. Please try again")
}
The problem with above snippet is that it jumps to the last line i.e. verify() before throwing an http exception for executeRoutine.
Update: Execute routine definition
fun executeRoutine(requestType: RequestType = RequestType.POST_LOGIN, execute: suspend () -> Unit) {
viewModelScope.launch {
withContext(Dispatchers.IO) {
_spinner.postValue(true)
try {
execute()
} catch (ex: HttpException) {
val errorHandler = errorHandlerFactory.create(requestType)
_error.postValue(errorHandler.getErrorMessageFrom(ex))
} catch (ex: Exception) {
_error.postValue(ex.localizedMessage)
Timber.e(ex)
} finally {
_spinner.postValue(false)
}
}
}
}
Upvotes: 0
Views: 145
Reputation: 198014
The problem is that the higher order function does execute, it just doesn't do what you think it does -- its execution is launching the task, not waiting for it to complete.
You will have to solve the problem another way, by either having your test wait until the change is observed, or having the callback complete a barrier to allow the test to proceed (e.g. completableJob.complete()
at the end of the call back, and completableJob.join()
waiting before proceeding with the test).
It might also be desirable to rearchitect your code so you don't have to do anything special, e.g. by making executeRoutine
a suspend function executing the code rather than launching the code in another scope.
Upvotes: 2