/**
* A new SubmissionPublisher has no subscribers, is not closed, has the given buffer size, and
* uses the given executor
*/
public void testConstructor2() {
Executor e = Executors.newFixedThreadPool(1);
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>(e, 8);
checkInitialState(p);
assertSame(p.getExecutor(), e);
assertEquals(8, p.getMaxBufferCapacity());
}
/**
* A default-constructed SubmissionPublisher has no subscribers, is not closed, has default buffer
* size, and uses the defaultExecutor
*/
public void testConstructor1() {
SubmissionPublisher<Integer> p = new SubmissionPublisher<Integer>();
checkInitialState(p);
assertEquals(p.getMaxBufferCapacity(), Flow.defaultBufferSize());
Executor e = p.getExecutor(), c = ForkJoinPool.commonPool();
if (ForkJoinPool.getCommonPoolParallelism() > 1) assertSame(e, c);
else assertNotSame(e, c);
}
/**
* 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());
}