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.assertSame;
  
  import java.util.Arrays;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link ExecutableTriggerStateMachine}. */
  @RunWith(JUnit4.class)
  public class ExecutableTriggerStateMachineTest {
  
    @Test
    public void testIndexAssignmentLeaf() throws Exception {
      StubStateMachine t1 = new StubStateMachine();
      ExecutableTriggerStateMachine executable = ExecutableTriggerStateMachine.create(t1);
      assertEquals(0, executable.getTriggerIndex());
    }
  
    @Test
    public void testIndexAssignmentOneLevel() throws Exception {
      StubStateMachine t1 = new StubStateMachine();
      StubStateMachine t2 = new StubStateMachine();
      StubStateMachine t = new StubStateMachine(t1, t2);
  
      ExecutableTriggerStateMachine executable = ExecutableTriggerStateMachine.create(t);
  
      assertEquals(0, executable.getTriggerIndex());
      assertEquals(1, executable.subTriggers().get(0).getTriggerIndex());
      assertSame(t1, executable.subTriggers().get(0).getSpec());
      assertEquals(2, executable.subTriggers().get(1).getTriggerIndex());
      assertSame(t2, executable.subTriggers().get(1).getSpec());
    }
  
    @Test
    public void testIndexAssignmentTwoLevel() throws Exception {
      StubStateMachine t11 = new StubStateMachine();
      StubStateMachine t12 = new StubStateMachine();
      StubStateMachine t13 = new StubStateMachine();
      StubStateMachine t14 = new StubStateMachine();
      StubStateMachine t21 = new StubStateMachine();
      StubStateMachine t22 = new StubStateMachine();
      StubStateMachine t1 = new StubStateMachine(t11, t12, t13, t14);
      StubStateMachine t2 = new StubStateMachine(t21, t22);
      StubStateMachine t = new StubStateMachine(t1, t2);
  
      ExecutableTriggerStateMachine executable = ExecutableTriggerStateMachine.create(t);
  
      assertEquals(0, executable.getTriggerIndex());
      assertEquals(1, executable.subTriggers().get(0).getTriggerIndex());
      assertEquals(6, executable.subTriggers().get(0).getFirstIndexAfterSubtree());
      assertEquals(6, executable.subTriggers().get(1).getTriggerIndex());
  
      assertSame(t1, executable.getSubTriggerContaining(1).getSpec());
      assertSame(t2, executable.getSubTriggerContaining(6).getSpec());
      assertSame(t1, executable.getSubTriggerContaining(2).getSpec());
      assertSame(t1, executable.getSubTriggerContaining(3).getSpec());
      assertSame(t1, executable.getSubTriggerContaining(5).getSpec());
      assertSame(t2, executable.getSubTriggerContaining(7).getSpec());
    }
  
    private static class StubStateMachine extends TriggerStateMachine {
  
      @SafeVarargs
      protected StubStateMachine(TriggerStateMachine... subTriggers) {
        super(Arrays.asList(subTriggers));
      }
  
      @Override
      public void prefetchOnElement(PrefetchContext c) {}
  
      @Override
      public void onElement(OnElementContext c) throws Exception {}
  
      @Override
      public void prefetchOnMerge(MergingPrefetchContext c) {}
  
      @Override
      public void onMerge(OnMergeContext c) throws Exception {}
  
      @Override
      public void prefetchShouldFire(PrefetchContext c) {}
  
      @Override
      public void clear(TriggerContext c) throws Exception {}
  
      @Override
      public boolean shouldFire(TriggerContext c) {
        return false;
      }
  
      @Override
      public void onFire(TriggerContext c) {}
    }
  }
  