TEST(AsyncQueue, TestConsumeAllEmptiesQueue)
{
AsyncQueue<int> q;
q.push(1);
q.push(2);
ASSERT_EQ(2, q.size());
q.consumeAll( [](int i) {});
EXPECT_EQ(0, q.size());
}
TEST(AsyncQueue, TestEmptyQueueBlocksConsumeAllUntilPushed)
{
AsyncQueue<int> q;
// run a separate thread to count how many items are consumed from the queue.
std::atomic<int> calls = 0;
std::thread t1([&] ()
{
q.consumeAll([&calls] (int i)
{
calls++;
});
});
// wait for 250 ms. Should be enougth to ensure no items have been consumed by the other thread
std::this_thread::sleep_for(std::chrono::milliseconds(250));
ASSERT_EQ(0, calls);
// push something onto the queue and wait for consumer t1 to complete.
q.push(1);
t1.join();
ASSERT_EQ(1, calls);
ASSERT_EQ(0, q.size());
}
