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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
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  package org.apache.beam.it.gcp.dataflow;
  
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  import java.io.IOException;
  import java.time.Instant;
  import org.apache.beam.it.common.PipelineLauncher;
  import org.apache.beam.it.gcp.IOLoadTestBase;
  import org.apache.beam.it.gcp.IOLoadTestBase.PipelineMetricsType;
  import org.apache.beam.sdk.io.GenerateSequence;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.testutils.metrics.TimeMonitor;
  import org.apache.beam.sdk.transforms.ParDo;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link DefaultPipelineLauncher}. */
  @RunWith(JUnit4.class)
  public class DefaultPipelineLauncherTest {
    @Rule public TestPipeline pipeline = TestPipeline.create();
  
    @Test
    public void testPipelineMetrics() throws IOException {
      DefaultPipelineLauncher launcher = DefaultPipelineLauncher.builder(null).build();
      final String timeMetrics = "run_time";
      final String counterMetrics = "counter";
      final long numElements = 1000L;
  
      pipeline
          .apply(GenerateSequence.from(0).to(numElements))
          .apply(ParDo.of(new TimeMonitor<>(IOLoadTestBase.BEAM_METRICS_NAMESPACE, timeMetrics)))
          .apply(ParDo.of(new IOLoadTestBase.CountingFn<>(counterMetrics)));
  
      PipelineLauncher.LaunchConfig options =
          PipelineLauncher.LaunchConfig.builder("test-bigquery-write")
              .setSdk(PipelineLauncher.Sdk.JAVA)
              .setPipeline(pipeline)
              .addParameter("runner", "DirectRunner")
              .build();
  
      PipelineLauncher.LaunchInfo launchInfo = launcher.launch("", "", options);
      long currentTime = System.currentTimeMillis();
      long startTime =
          launcher.getBeamMetric(launchInfo.jobId(), PipelineMetricsType.STARTTIME, timeMetrics);
      long endTime =
          launcher.getBeamMetric(launchInfo.jobId(), PipelineMetricsType.ENDTIME, timeMetrics);
      long runTime =
          launcher.getBeamMetric(launchInfo.jobId(), PipelineMetricsType.RUNTIME, timeMetrics);
      long count =
          launcher.getBeamMetric(launchInfo.jobId(), PipelineMetricsType.COUNTER, counterMetrics);
  
      // check the validity of time metrics: start time and end time metrics is within 1 minute of
      // current
      assertTrue(
          String.format(
              "start time metrics (%s) is not around current time", Instant.ofEpochMilli(startTime)),
          Math.abs(startTime - currentTime) < 10_000);
      assertTrue(
          String.format(
              "start time metrics (%s) is not around current time", Instant.ofEpochMilli(endTime)),
          Math.abs(endTime - currentTime) < 10_000);
      assertTrue("run time should be greater than 0", runTime > 0);
  
      assertEquals(numElements, count);
    }
  }
  