public async Task EnsureNoMessageSent(int timeout = 10000)
{
Task <T> onMessageTask;
lock (lockObj)
{
while (listenPosition >= completionSources.Count)
{
completionSources.Add(new TaskCompletionSource <T>());
}
onMessageTask = completionSources[listenPosition].Task;
}
await IntegrationTestHelper.EnsureTaskDoesntCompleteAsync(onMessageTask, timeout);
}