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 java.util.Arrays;
  import java.util.List;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link TriggerStateMachine}. */
  @RunWith(JUnit4.class)
  public class TriggerStateMachineTest {
  
    @Test
    public void testTriggerToString() throws Exception {
      assertEquals(
          "AfterWatermark.pastEndOfWindow()",
          AfterWatermarkStateMachine.pastEndOfWindow().toString());
      assertEquals(
          "Repeatedly.forever(AfterWatermark.pastEndOfWindow())",
          RepeatedlyStateMachine.forever(AfterWatermarkStateMachine.pastEndOfWindow()).toString());
    }
  
    @Test
    public void testIsCompatible() throws Exception {
      assertTrue(new Trigger1(null).isCompatible(new Trigger1(null)));
      assertTrue(
          new Trigger1(Arrays.asList(new Trigger2(null)))
              .isCompatible(new Trigger1(Arrays.asList(new Trigger2(null)))));
  
      assertFalse(new Trigger1(null).isCompatible(new Trigger2(null)));
      assertFalse(
          new Trigger1(Arrays.asList(new Trigger1(null)))
              .isCompatible(new Trigger1(Arrays.asList(new Trigger2(null)))));
    }
  
    private static class Trigger1 extends TriggerStateMachine {
  
      private Trigger1(List<TriggerStateMachine> subTriggers) {
        super(subTriggers);
      }
  
      @Override
      public void prefetchOnElement(PrefetchContext c) {}
  
      @Override
      public void onElement(TriggerStateMachine.OnElementContext c) {}
  
      @Override
      public void prefetchOnMerge(MergingPrefetchContext c) {}
  
      @Override
      public void onMerge(TriggerStateMachine.OnMergeContext c) {}
  
      @Override
      public void prefetchShouldFire(PrefetchContext c) {}
  
      @Override
      public boolean shouldFire(TriggerStateMachine.TriggerContext context) throws Exception {
        return false;
      }
  
      @Override
      public void onFire(TriggerStateMachine.TriggerContext context) throws Exception {}
    }
  
    private static class Trigger2 extends TriggerStateMachine {
  
      private Trigger2(List<TriggerStateMachine> subTriggers) {
        super(subTriggers);
      }
  
      @Override
      public void prefetchOnElement(PrefetchContext c) {}
  
      @Override
      public void onElement(TriggerStateMachine.OnElementContext c) {}
  
      @Override
      public void prefetchOnMerge(MergingPrefetchContext c) {}
  
      @Override
      public void onMerge(TriggerStateMachine.OnMergeContext c) {}
  
      @Override
      public void prefetchShouldFire(PrefetchContext c) {}
  
      @Override
      public boolean shouldFire(TriggerStateMachine.TriggerContext context) throws Exception {
        return false;
      }
  
      @Override
      public void onFire(TriggerStateMachine.TriggerContext context) throws Exception {}
    }
  }
  