/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.streaming.runtime.operators.windowing;
import com.google.common.collect.Lists;
import org.apache.flink.streaming.api.windowing.triggers.EventTimeTrigger;
import org.apache.flink.streaming.api.windowing.triggers.TriggerResult;
import org.apache.flink.streaming.api.windowing.windows.TimeWindow;
import org.apache.flink.streaming.runtime.streamrecord.StreamRecord;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* Tests for {@link EventTimeTrigger}.
*/
public class EventTimeTriggerTest {
/**
* Verify that state of separate windows does not leak into other windows.
*/
@Test
public void testWindowSeparationAndFiring() throws Exception {
TriggerTestHarness<Object, TimeWindow> testHarness =
new TriggerTestHarness<>(EventTimeTrigger.create(), new TimeWindow.Serializer());
// inject several elements
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(0, 2)));
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(0, 2)));
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(0, 2)));
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(2, 4)));
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(2, 4)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(2, testHarness.numEventTimeTimers());
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(0, 2)));
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(2, 4)));
assertEquals(TriggerResult.FIRE, testHarness.advanceWatermark(2, new TimeWindow(0, 2)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(1, testHarness.numEventTimeTimers());
assertEquals(0, testHarness.numEventTimeTimers(new TimeWindow(0, 2)));
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(2, 4)));
assertEquals(TriggerResult.FIRE, testHarness.advanceWatermark(4, new TimeWindow(2, 4)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(0, testHarness.numEventTimeTimers());
}
/**
* Verify that late elements trigger immediately and also that we don't set a timer
* for those.
*/
@Test
public void testLateElementTriggersImmediately() throws Exception {
TriggerTestHarness<Object, TimeWindow> testHarness =
new TriggerTestHarness<>(EventTimeTrigger.create(), new TimeWindow.Serializer());
testHarness.advanceWatermark(2);
assertEquals(TriggerResult.FIRE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(0, 2)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(0, testHarness.numEventTimeTimers());
}
/**
* Verify that clear() does not leak across windows.
*/
@Test
public void testClear() throws Exception {
TriggerTestHarness<Object, TimeWindow> testHarness =
new TriggerTestHarness<>(EventTimeTrigger.create(), new TimeWindow.Serializer());
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(0, 2)));
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(2, 4)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(2, testHarness.numEventTimeTimers());
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(0, 2)));
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(2, 4)));
testHarness.clearTriggerState(new TimeWindow(2, 4));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(1, testHarness.numEventTimeTimers());
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(0, 2)));
assertEquals(0, testHarness.numEventTimeTimers(new TimeWindow(2, 4)));
testHarness.clearTriggerState(new TimeWindow(0, 2));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(0, testHarness.numEventTimeTimers());
}
@Test
public void testMergingWindows() throws Exception {
TriggerTestHarness<Object, TimeWindow> testHarness =
new TriggerTestHarness<>(EventTimeTrigger.create(), new TimeWindow.Serializer());
assertTrue(EventTimeTrigger.create().canMerge());
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(0, 2)));
assertEquals(TriggerResult.CONTINUE, testHarness.processElement(new StreamRecord<Object>(1), new TimeWindow(2, 4)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(2, testHarness.numEventTimeTimers());
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(0, 2)));
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(2, 4)));
testHarness.mergeWindows(new TimeWindow(0, 4), Lists.newArrayList(new TimeWindow(0, 2), new TimeWindow(2, 4)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(1, testHarness.numEventTimeTimers());
assertEquals(0, testHarness.numEventTimeTimers(new TimeWindow(0, 2)));
assertEquals(0, testHarness.numEventTimeTimers(new TimeWindow(2, 4)));
assertEquals(1, testHarness.numEventTimeTimers(new TimeWindow(0, 4)));
assertEquals(TriggerResult.FIRE, testHarness.advanceWatermark(4, new TimeWindow(0, 4)));
assertEquals(0, testHarness.numStateEntries());
assertEquals(0, testHarness.numProcessingTimeTimers());
assertEquals(0, testHarness.numEventTimeTimers());
}
}