content: /*
   * 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 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.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests the {@link AfterSynchronizedProcessingTimeStateMachine}. */
  @RunWith(JUnit4.class)
  public class AfterSynchronizedProcessingTimeStateMachineTest {
  
    @Test
    public void testAfterProcessingTimeWithFixedWindows() throws Exception {
      Duration windowDuration = Duration.millis(10);
      SimpleTriggerStateMachineTester<IntervalWindow> tester =
          TriggerStateMachineTester.forTrigger(
              AfterProcessingTimeStateMachine.pastFirstElementInPane()
                  .plusDelayOf(Duration.millis(5)),
              FixedWindows.of(windowDuration));
  
      tester.advanceProcessingTime(new Instant(10));
  
      // Timer at 15
      tester.injectElements(1);
      IntervalWindow firstWindow = new IntervalWindow(new Instant(0), new Instant(10));
      tester.advanceProcessingTime(new Instant(12));
      assertFalse(tester.shouldFire(firstWindow));
  
      // Load up elements in the next window, timer at 17 for them
      tester.injectElements(11, 12, 13);
      IntervalWindow secondWindow = new IntervalWindow(new Instant(10), new Instant(20));
      assertFalse(tester.shouldFire(secondWindow));
  
      // Not quite time to fire
      tester.advanceProcessingTime(new Instant(14));
      assertFalse(tester.shouldFire(firstWindow));
      assertFalse(tester.shouldFire(secondWindow));
  
      // Timer at 19 for these in the first window; it should be ignored since the 15 will fire first
      tester.injectElements(2, 3);
  
      // Advance past the first timer and fire, finishing the first window
      tester.advanceProcessingTime(new Instant(16));
      assertTrue(tester.shouldFire(firstWindow));
      assertFalse(tester.shouldFire(secondWindow));
      tester.fireIfShouldFire(firstWindow);
      assertTrue(tester.isMarkedFinished(firstWindow));
  
      // The next window fires and finishes now
      tester.advanceProcessingTime(new Instant(18));
      assertTrue(tester.shouldFire(secondWindow));
      tester.fireIfShouldFire(secondWindow);
      assertTrue(tester.isMarkedFinished(secondWindow));
    }
  
    @Test
    public void testAfterProcessingTimeWithMergingWindow() throws Exception {
      Duration windowDuration = Duration.millis(10);
      SimpleTriggerStateMachineTester<IntervalWindow> tester =
          TriggerStateMachineTester.forTrigger(
              AfterProcessingTimeStateMachine.pastFirstElementInPane()
                  .plusDelayOf(Duration.millis(5)),
              Sessions.withGapDuration(windowDuration));
  
      tester.advanceProcessingTime(new Instant(10));
      tester.injectElements(1); // in [1, 11), timer for 15
      IntervalWindow firstWindow = new IntervalWindow(new Instant(1), new Instant(11));
      assertFalse(tester.shouldFire(firstWindow));
  
      tester.advanceProcessingTime(new Instant(12));
      tester.injectElements(3); // in [3, 13), timer for 17
      IntervalWindow secondWindow = new IntervalWindow(new Instant(3), new Instant(13));
      assertFalse(tester.shouldFire(secondWindow));
  
      tester.mergeWindows();
      IntervalWindow mergedWindow = new IntervalWindow(new Instant(1), new Instant(13));
  
      tester.advanceProcessingTime(new Instant(16));
      assertTrue(tester.shouldFire(mergedWindow));
    }
  }
  