private void injectElements(int... elements) throws Exception {
for (int element : elements) {
doNothing().when(mockEarly).onElement(anyElementContext());
doNothing().when(mockLate).onElement(anyElementContext());
tester.injectElements(element);
}
}
/**
* Tests that if the EOW is finished in both as well as the merged window, then it is finished in
* the merged result.
*
* <p>Because windows are discarded when a trigger finishes, we need to embed this in a sequence
* in order to check that it is re-activated. So this test is potentially sensitive to other
* triggers' correctness.
*/
@Test
public void testEarlyAndLateOnMergeAlreadyFinished() throws Exception {
tester =
TriggerTester.forTrigger(
AfterWatermark.<IntervalWindow>pastEndOfWindow()
.withEarlyFirings(AfterPane.<IntervalWindow>elementCountAtLeast(100))
.withLateFirings(AfterPane.<IntervalWindow>elementCountAtLeast(1)),
Sessions.withGapDuration(Duration.millis(10)));
tester.injectElements(1);
tester.injectElements(5);
IntervalWindow firstWindow = new IntervalWindow(new Instant(1), new Instant(11));
IntervalWindow secondWindow = new IntervalWindow(new Instant(5), new Instant(15));
IntervalWindow mergedWindow = new IntervalWindow(new Instant(1), new Instant(15));
// Finish the AfterWatermark.pastEndOfWindow() bit of the trigger in both windows
tester.advanceInputWatermark(new Instant(15));
assertTrue(tester.shouldFire(firstWindow));
assertTrue(tester.shouldFire(secondWindow));
tester.fireIfShouldFire(firstWindow);
tester.fireIfShouldFire(secondWindow);
// Confirm that we are on the late trigger by probing
assertFalse(tester.shouldFire(firstWindow));
assertFalse(tester.shouldFire(secondWindow));
tester.injectElements(1);
tester.injectElements(5);
assertTrue(tester.shouldFire(firstWindow));
assertTrue(tester.shouldFire(secondWindow));
tester.fireIfShouldFire(firstWindow);
tester.fireIfShouldFire(secondWindow);
// Merging should leave it on the late trigger
tester.mergeWindows();
// Confirm that we are on the late trigger by probing
assertFalse(tester.shouldFire(mergedWindow));
tester.injectElements(1);
assertTrue(tester.shouldFire(mergedWindow));
}
/**
* Tests that the trigger rewinds to be non-finished in the merged window.
*
* <p>Because windows are discarded when a trigger finishes, we need to embed this in a sequence
* in order to check that it is re-activated. So this test is potentially sensitive to other
* triggers' correctness.
*/
@Test
public void testOnMergeRewinds() throws Exception {
tester =
TriggerTester.forTrigger(
AfterEach.inOrder(
AfterWatermark.<IntervalWindow>pastEndOfWindow(),
Repeatedly.forever(AfterPane.<IntervalWindow>elementCountAtLeast(1))),
Sessions.withGapDuration(Duration.millis(10)));
tester.injectElements(1);
tester.injectElements(5);
IntervalWindow firstWindow = new IntervalWindow(new Instant(1), new Instant(11));
IntervalWindow secondWindow = new IntervalWindow(new Instant(5), new Instant(15));
IntervalWindow mergedWindow = new IntervalWindow(new Instant(1), new Instant(15));
// Finish the AfterWatermark.pastEndOfWindow() trigger in only the first window
tester.advanceInputWatermark(new Instant(11));
assertTrue(tester.shouldFire(firstWindow));
assertFalse(tester.shouldFire(secondWindow));
tester.fireIfShouldFire(firstWindow);
// Confirm that we are on the second trigger by probing
assertFalse(tester.shouldFire(firstWindow));
tester.injectElements(1);
assertTrue(tester.shouldFire(firstWindow));
tester.fireIfShouldFire(firstWindow);
// Merging should re-activate the watermark trigger in the merged window
tester.mergeWindows();
// Confirm that we are not on the second trigger by probing
assertFalse(tester.shouldFire(mergedWindow));
tester.injectElements(1);
assertFalse(tester.shouldFire(mergedWindow));
// And confirm that advancing the watermark fires again
tester.advanceInputWatermark(new Instant(15));
assertTrue(tester.shouldFire(mergedWindow));
}