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.dataflow.worker;
  
  import static org.apache.beam.runners.dataflow.worker.WindmillTimeUtils.harnessToWindmillTimestamp;
  import static org.apache.beam.runners.dataflow.worker.WindmillTimeUtils.windmillToHarnessTimestamp;
  import static org.apache.beam.runners.dataflow.worker.WindmillTimeUtils.windmillToHarnessWatermark;
  import static org.junit.Assert.assertEquals;
  
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.joda.time.Duration;
  import org.joda.time.Instant;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Unit tests for {@link WindmillTimeUtils}. */
  @RunWith(JUnit4.class)
  public class WindmillTimeUtilsTest {
    @Test
    public void testWindmillToHarnessWatermark() {
      assertEquals(null, windmillToHarnessWatermark(Long.MIN_VALUE));
      assertEquals(BoundedWindow.TIMESTAMP_MAX_VALUE, windmillToHarnessWatermark(Long.MAX_VALUE));
      assertEquals(
          BoundedWindow.TIMESTAMP_MAX_VALUE, windmillToHarnessWatermark(Long.MAX_VALUE - 17));
      assertEquals(new Instant(16), windmillToHarnessWatermark(16999));
      assertEquals(new Instant(17), windmillToHarnessWatermark(17120));
      assertEquals(new Instant(17), windmillToHarnessWatermark(17000));
      assertEquals(new Instant(-17), windmillToHarnessWatermark(-16987));
      assertEquals(new Instant(-17), windmillToHarnessWatermark(-17000));
      assertEquals(new Instant(-18), windmillToHarnessTimestamp(-17001));
    }
  
    @Test
    public void testWindmillToHarnessTimestamp() {
      assertEquals(BoundedWindow.TIMESTAMP_MAX_VALUE, windmillToHarnessTimestamp(Long.MAX_VALUE));
      assertEquals(
          BoundedWindow.TIMESTAMP_MAX_VALUE, windmillToHarnessTimestamp(Long.MAX_VALUE - 17));
      assertEquals(new Instant(16), windmillToHarnessWatermark(16999));
      assertEquals(new Instant(17), windmillToHarnessTimestamp(17120));
      assertEquals(new Instant(17), windmillToHarnessTimestamp(17000));
      assertEquals(new Instant(-17), windmillToHarnessTimestamp(-16987));
      assertEquals(new Instant(-17), windmillToHarnessTimestamp(-17000));
      assertEquals(new Instant(-18), windmillToHarnessTimestamp(-17001));
      assertEquals(BoundedWindow.TIMESTAMP_MIN_VALUE, windmillToHarnessTimestamp(Long.MIN_VALUE + 1));
      assertEquals(BoundedWindow.TIMESTAMP_MIN_VALUE, windmillToHarnessTimestamp(Long.MIN_VALUE + 2));
      // Long.MIN_VALUE = -9223372036854775808, need to add 1808 microseconds to get to next
      // millisecond returned by Beam.
      assertEquals(
          BoundedWindow.TIMESTAMP_MIN_VALUE.plus(Duration.millis(1)),
          windmillToHarnessTimestamp(Long.MIN_VALUE + 1808));
      assertEquals(
          BoundedWindow.TIMESTAMP_MIN_VALUE, windmillToHarnessTimestamp(Long.MIN_VALUE + 1807));
    }
  
    @Test
    public void testHarnessToWindmillTimestamp() {
      assertEquals(Long.MAX_VALUE, harnessToWindmillTimestamp(BoundedWindow.TIMESTAMP_MAX_VALUE));
      assertEquals(-1000, harnessToWindmillTimestamp(new Instant(-1)));
      assertEquals(1000, harnessToWindmillTimestamp(new Instant(1)));
      assertEquals(Long.MIN_VALUE + 1, harnessToWindmillTimestamp(new Instant(Long.MIN_VALUE)));
      assertEquals(
          Long.MIN_VALUE + 1, harnessToWindmillTimestamp(new Instant(Long.MIN_VALUE / 1000 - 1)));
    }
  }
  