<Unit Test Firestore CallbackFlow> I wrote the fol...

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[user]

Unit Test Firestore CallbackFlow
I wrote the following code to test Firestore data reading with coroutines' runTest function:
@Test
fun `callbackFlow should read trip`() =
runTest {
log("test started")
var result: DocumentSnapshot? = null

val flow = callbackFlow {
log("callbackFlow started")
val listener = firestore
.collection("/collection")
.addSnapshotListener { snapshot, e ->
e?.let {...