/**
* estimateMinimumDemand reports 0 until request, nonzero after request, and zero again after
* delivery
*/
public void testEstimateMinimumDemand() {
TestSubscriber s = new TestSubscriber();
SubmissionPublisher<Integer> p = basicPublisher();
s.request = false;
p.subscribe(s);
s.awaitSubscribe();
assertEquals(0, p.estimateMinimumDemand());
s.sn.request(1);
assertEquals(1, p.estimateMinimumDemand());
p.submit(1);
s.awaitNext(1);
assertEquals(0, p.estimateMinimumDemand());
}
/**
* 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());
}
/** submit eventually issues requested items when buffer capacity is 1 */
public void testCap1Submit() {
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>(basicExecutor, 1);
TestSubscriber s1 = new TestSubscriber();
TestSubscriber s2 = new TestSubscriber();
p.subscribe(s1);
p.subscribe(s2);
for (int i = 1; i <= 20; ++i) {
assertTrue(p.estimateMinimumDemand() <= 1);
assertTrue(p.submit(i) >= 0);
}
p.close();
s2.awaitComplete();
s1.awaitComplete();
assertEquals(20, s2.nexts);
assertEquals(1, s2.completes);
assertEquals(20, s1.nexts);
assertEquals(1, s1.completes);
}
/** onNext is issued only if requested */
public void testRequest1() {
SubmissionPublisher<Integer> p = basicPublisher();
TestSubscriber s1 = new TestSubscriber();
s1.request = false;
p.subscribe(s1);
s1.awaitSubscribe();
assertTrue(p.estimateMinimumDemand() == 0);
TestSubscriber s2 = new TestSubscriber();
p.subscribe(s2);
p.submit(1);
p.submit(2);
s2.awaitNext(1);
assertEquals(0, s1.nexts);
s1.sn.request(3);
p.submit(3);
p.close();
s2.awaitComplete();
assertEquals(3, s2.nexts);
assertEquals(1, s2.completes);
s1.awaitComplete();
assertTrue(s1.nexts > 0);
assertEquals(1, s1.completes);
}