I am testing a component, that depends on a cache ...

# coroutines

[CLOVIS]

I am testing a component, that depends on a cache implementation. The cache implementation is not part of the SUT, and it is expected that it outlives the SUT.

Currently, I'm using this:

@Test
fun test() = runTest {
    val cache = FakeCacheImplementation(currentCoroutineContext())

    // actually do the test
}

However, the cache outlives the test, runTest never completes (always times out) because the cache's coroutine is always running. What is the recommended solution to deal with these kinds of dependencies? I found that adding currentCoroutineContext().cancelChildren() at the end of the test does work, but I'm not sure it's good practice.

Ideally, I'd like something like:

@Test
fun test() = runTest {
    val cache = withContext(BackgroundWorkIDontCareAbout) {
        FakeCacheImplementation(currentCoroutineContext())
    }

    // actually do the test
} // waits for all jobs except those marked with BackgroundWorkIDontCareAbout, which are just cancelled immediately

Edit. It already exists