/** Checks that the threads do not terminate within the given millisecond delay. */
void assertThreadsStayAlive(long millis, Thread... threads) {
try {
// No need to optimize the failing case via Thread.join.
delay(millis);
for (Thread thread : threads) assertTrue(thread.isAlive());
} catch (InterruptedException ie) {
fail("Unexpected InterruptedException");
}
}
/**
* Spin-waits up to the specified number of milliseconds for the given thread to enter a wait
* state: BLOCKED, WAITING, or TIMED_WAITING.
*/
void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) {
long startTime = System.nanoTime();
for (; ; ) {
Thread.State s = thread.getState();
if (s == Thread.State.BLOCKED || s == Thread.State.WAITING || s == Thread.State.TIMED_WAITING)
return;
else if (s == Thread.State.TERMINATED) fail("Unexpected thread termination");
else if (millisElapsedSince(startTime) > timeoutMillis) {
threadAssertTrue(thread.isAlive());
return;
}
Thread.yield();
}
}