/*
* 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.beam.runners.core.triggers;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import static org.mockito.Mockito.when;
import org.apache.beam.runners.core.triggers.TriggerStateMachine.OnceTriggerStateMachine;
import org.apache.beam.runners.core.triggers.TriggerStateMachineTester.SimpleTriggerStateMachineTester;
import org.apache.beam.sdk.transforms.windowing.FixedWindows;
import org.apache.beam.sdk.transforms.windowing.IntervalWindow;
import org.apache.beam.sdk.transforms.windowing.Sessions;
import org.joda.time.Duration;
import org.joda.time.Instant;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.mockito.Mock;
import org.mockito.Mockito;
import org.mockito.MockitoAnnotations;
/**
* Tests for {@link AfterFirstStateMachine}.
*/
@RunWith(JUnit4.class)
public class AfterFirstStateMachineTest {
@Mock private OnceTriggerStateMachine mockTrigger1;
@Mock private OnceTriggerStateMachine mockTrigger2;
private SimpleTriggerStateMachineTester<IntervalWindow> tester;
private static TriggerStateMachine.TriggerContext anyTriggerContext() {
return Mockito.<TriggerStateMachine.TriggerContext>any();
}
@Before
public void initMocks() {
MockitoAnnotations.initMocks(this);
}
@Test
public void testNeitherShouldFireFixedWindows() throws Exception {
tester =
TriggerStateMachineTester.forTrigger(
AfterFirstStateMachine.of(mockTrigger1, mockTrigger2),
FixedWindows.of(Duration.millis(10)));
tester.injectElements(1);
IntervalWindow window = new IntervalWindow(new Instant(0), new Instant(10));
when(mockTrigger1.shouldFire(anyTriggerContext())).thenReturn(false);
when(mockTrigger2.shouldFire(anyTriggerContext())).thenReturn(false);
assertFalse(tester.shouldFire(window)); // should not fire
assertFalse(tester.isMarkedFinished(window)); // not finished
}
@Test
public void testOnlyT1ShouldFireFixedWindows() throws Exception {
tester =
TriggerStateMachineTester.forTrigger(
AfterFirstStateMachine.of(mockTrigger1, mockTrigger2),
FixedWindows.of(Duration.millis(10)));
tester.injectElements(1);
IntervalWindow window = new IntervalWindow(new Instant(1), new Instant(11));
when(mockTrigger1.shouldFire(anyTriggerContext())).thenReturn(true);
when(mockTrigger2.shouldFire(anyTriggerContext())).thenReturn(false);
assertTrue(tester.shouldFire(window)); // should fire
tester.fireIfShouldFire(window);
assertTrue(tester.isMarkedFinished(window));
}
@Test
public void testOnlyT2ShouldFireFixedWindows() throws Exception {
tester = TriggerStateMachineTester.forTrigger(
AfterFirstStateMachine.of(mockTrigger1, mockTrigger2), FixedWindows.of(Duration.millis(10)));
tester.injectElements(1);
IntervalWindow window = new IntervalWindow(new Instant(1), new Instant(11));
when(mockTrigger1.shouldFire(anyTriggerContext())).thenReturn(false);
when(mockTrigger2.shouldFire(anyTriggerContext())).thenReturn(true);
assertTrue(tester.shouldFire(window)); // should fire
tester.fireIfShouldFire(window); // now finished
assertTrue(tester.isMarkedFinished(window));
}
@Test
public void testBothShouldFireFixedWindows() throws Exception {
tester = TriggerStateMachineTester.forTrigger(
AfterFirstStateMachine.of(mockTrigger1, mockTrigger2), FixedWindows.of(Duration.millis(10)));
tester.injectElements(1);
IntervalWindow window = new IntervalWindow(new Instant(1), new Instant(11));
when(mockTrigger1.shouldFire(anyTriggerContext())).thenReturn(true);
when(mockTrigger2.shouldFire(anyTriggerContext())).thenReturn(true);
assertTrue(tester.shouldFire(window)); // should fire
tester.fireIfShouldFire(window);
assertTrue(tester.isMarkedFinished(window));
}
/**
* Tests that if the first trigger rewinds to be non-finished in the merged window,
* then it becomes the currently active trigger again, with real triggers.
*/
@Test
public void testShouldFireAfterMerge() throws Exception {
tester = TriggerStateMachineTester.forTrigger(
AfterEachStateMachine.inOrder(
AfterFirstStateMachine.of(
AfterPaneStateMachine.elementCountAtLeast(5),
AfterWatermarkStateMachine.pastEndOfWindow()),
RepeatedlyStateMachine.forever(AfterPaneStateMachine.elementCountAtLeast(1))),
Sessions.withGapDuration(Duration.millis(10)));
// Finished the AfterFirst in the first window
tester.injectElements(1);
IntervalWindow firstWindow = new IntervalWindow(new Instant(1), new Instant(11));
assertFalse(tester.shouldFire(firstWindow));
tester.advanceInputWatermark(new Instant(11));
assertTrue(tester.shouldFire(firstWindow));
tester.fireIfShouldFire(firstWindow);
// Set up second window where it is not done
tester.injectElements(5);
IntervalWindow secondWindow = new IntervalWindow(new Instant(5), new Instant(15));
assertFalse(tester.shouldFire(secondWindow));
// Merge them, if the merged window were on the second trigger, it would be ready
tester.mergeWindows();
IntervalWindow mergedWindow = new IntervalWindow(new Instant(1), new Instant(15));
assertFalse(tester.shouldFire(mergedWindow));
// Now adding 3 more makes the AfterFirst ready to fire
tester.injectElements(1, 2, 3, 4, 5);
tester.mergeWindows();
assertTrue(tester.shouldFire(mergedWindow));
}
}