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   * 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.metrics;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.mockito.Mockito.mock;
  import static org.mockito.Mockito.times;
  import static org.mockito.Mockito.verify;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import org.apache.beam.model.pipeline.v1.MetricsApi.MonitoringInfo;
  import org.hamcrest.Matcher;
  import org.hamcrest.Matchers;
  import org.junit.Test;
  
  /** Tests for {@link SimpleStateRegistryTest}. */
  public class SimpleStateRegistryTest {
  
    @Test
    public void testExecutionTimeUrnsBuildMonitoringInfos() throws Exception {
      String testPTransformId = "pTransformId";
      HashMap<String, String> labelsMetadata = new HashMap<String, String>();
      labelsMetadata.put(MonitoringInfoConstants.Labels.PTRANSFORM, testPTransformId);
      SimpleExecutionState startState =
          new SimpleExecutionState(
              ExecutionStateTracker.START_STATE_NAME,
              MonitoringInfoConstants.Urns.START_BUNDLE_MSECS,
              labelsMetadata);
      SimpleExecutionState processState =
          new SimpleExecutionState(
              ExecutionStateTracker.PROCESS_STATE_NAME,
              MonitoringInfoConstants.Urns.PROCESS_BUNDLE_MSECS,
              labelsMetadata);
      SimpleExecutionState finishState =
          new SimpleExecutionState(
              ExecutionStateTracker.FINISH_STATE_NAME,
              MonitoringInfoConstants.Urns.FINISH_BUNDLE_MSECS,
              labelsMetadata);
  
      SimpleStateRegistry testObject = new SimpleStateRegistry();
      testObject.register(startState);
      testObject.register(processState);
      testObject.register(finishState);
      List<MonitoringInfo> testOutput = testObject.getExecutionTimeMonitoringInfos();
  
      List<Matcher<MonitoringInfo>> matchers = new ArrayList<Matcher<MonitoringInfo>>();
      SimpleMonitoringInfoBuilder builder = new SimpleMonitoringInfoBuilder();
      builder.setUrn(MonitoringInfoConstants.Urns.START_BUNDLE_MSECS);
      builder.setInt64SumValue(0);
      builder.setLabel(MonitoringInfoConstants.Labels.PTRANSFORM, testPTransformId);
      matchers.add(MonitoringInfoMatchers.matchSetFields(builder.build()));
  
      // Check for execution time metrics for the testPTransformId
      builder = new SimpleMonitoringInfoBuilder();
      builder.setUrn(MonitoringInfoConstants.Urns.PROCESS_BUNDLE_MSECS);
      builder.setInt64SumValue(0);
      builder.setLabel(MonitoringInfoConstants.Labels.PTRANSFORM, testPTransformId);
      matchers.add(MonitoringInfoMatchers.matchSetFields(builder.build()));
  
      builder = new SimpleMonitoringInfoBuilder();
      builder.setUrn(MonitoringInfoConstants.Urns.FINISH_BUNDLE_MSECS);
      builder.setInt64SumValue(0);
      builder.setLabel(MonitoringInfoConstants.Labels.PTRANSFORM, testPTransformId);
      matchers.add(MonitoringInfoMatchers.matchSetFields(builder.build()));
  
      for (Matcher<MonitoringInfo> matcher : matchers) {
        assertThat(testOutput, Matchers.hasItem(matcher));
      }
    }
  
    @Test
    public void testResetRegistry() {
      SimpleExecutionState state1 = mock(SimpleExecutionState.class);
      SimpleExecutionState state2 = mock(SimpleExecutionState.class);
  
      SimpleStateRegistry testObject = new SimpleStateRegistry();
      testObject.register(state1);
      testObject.register(state2);
  
      testObject.reset();
      verify(state1, times(1)).reset();
      verify(state2, times(1)).reset();
    }
  }
  