/** submit returns number of lagged items, compatible with result of estimateMaximumLag. */
public void testLaggedSubmit() {
SubmissionPublisher<Integer> p = basicPublisher();
TestSubscriber s1 = new TestSubscriber();
s1.request = false;
TestSubscriber s2 = new TestSubscriber();
s2.request = false;
p.subscribe(s1);
p.subscribe(s2);
s2.awaitSubscribe();
s1.awaitSubscribe();
assertEquals(1, p.submit(1));
assertTrue(p.estimateMaximumLag() >= 1);
assertTrue(p.submit(2) >= 2);
assertTrue(p.estimateMaximumLag() >= 2);
s1.sn.request(4);
assertTrue(p.submit(3) >= 3);
assertTrue(p.estimateMaximumLag() >= 3);
s2.sn.request(4);
p.submit(4);
p.close();
s2.awaitComplete();
assertEquals(4, s2.nexts);
s1.awaitComplete();
assertEquals(4, s2.nexts);
}
/**
* A new SubmissionPublisher has no subscribers, a non-null executor, a power-of-two capacity, is
* not closed, and reports zero demand and lag
*/
void checkInitialState(SubmissionPublisher<?> p) {
assertFalse(p.hasSubscribers());
assertEquals(0, p.getNumberOfSubscribers());
assertTrue(p.getSubscribers().isEmpty());
assertFalse(p.isClosed());
assertNull(p.getClosedException());
int n = p.getMaxBufferCapacity();
assertTrue((n & (n - 1)) == 0); // power of two
assertNotNull(p.getExecutor());
assertEquals(0, p.estimateMinimumDemand());
assertEquals(0, p.estimateMaximumLag());
}