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.assertEquals;
  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.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.MockitoAnnotations;
  
  /** Tests for {@link AfterEachStateMachine}. */
  @RunWith(JUnit4.class)
  public class AfterEachStateMachineTest {
  
    private SimpleTriggerStateMachineTester<IntervalWindow> tester;
  
    @Before
    public void initMocks() {
      MockitoAnnotations.initMocks(this);
    }
  
    /**
     * Tests that the {@link AfterEachStateMachine} trigger fires and finishes the first trigger then
     * the second.
     */
    @Test
    public void testAfterEachInSequence() throws Exception {
      tester =
          TriggerStateMachineTester.forTrigger(
              AfterEachStateMachine.inOrder(
                  RepeatedlyStateMachine.forever(AfterPaneStateMachine.elementCountAtLeast(2))
                      .orFinally(AfterPaneStateMachine.elementCountAtLeast(3)),
                  RepeatedlyStateMachine.forever(AfterPaneStateMachine.elementCountAtLeast(5))
                      .orFinally(AfterWatermarkStateMachine.pastEndOfWindow())),
              FixedWindows.of(Duration.millis(10)));
  
      IntervalWindow window = new IntervalWindow(new Instant(0), new Instant(10));
  
      // AfterCount(2) not ready
      tester.injectElements(1);
      assertFalse(tester.shouldFire(window));
  
      // AfterCount(2) ready, not finished
      tester.injectElements(2);
      assertTrue(tester.shouldFire(window));
      tester.fireIfShouldFire(window);
      assertFalse(tester.isMarkedFinished(window));
  
      // orFinally(AfterCount(3)) ready and will finish the first
      tester.injectElements(1, 2, 3);
      assertTrue(tester.shouldFire(window));
      tester.fireIfShouldFire(window);
      assertFalse(tester.isMarkedFinished(window));
  
      // Now running as the second trigger
      assertFalse(tester.shouldFire(window));
      // This quantity of elements would fire and finish if it were erroneously still the first
      tester.injectElements(1, 2, 3, 4);
      assertFalse(tester.shouldFire(window));
  
      // Now fire once
      tester.injectElements(5);
      assertTrue(tester.shouldFire(window));
      tester.fireIfShouldFire(window);
      assertFalse(tester.isMarkedFinished(window));
  
      // This time advance the watermark to finish the whole mess.
      tester.advanceInputWatermark(new Instant(10));
      assertTrue(tester.shouldFire(window));
      tester.fireIfShouldFire(window);
      assertTrue(tester.isMarkedFinished(window));
    }
  
    @Test
    public void testToString() {
      TriggerStateMachine trigger =
          AfterEachStateMachine.inOrder(
              StubTriggerStateMachine.named("t1"),
              StubTriggerStateMachine.named("t2"),
              StubTriggerStateMachine.named("t3"));
  
      assertEquals("AfterEach.inOrder(t1, t2, t3)", trigger.toString());
    }
  }
  