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.sdk.transforms;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  
  import java.io.Serializable;
  import org.apache.beam.sdk.testing.PAssert;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.sdk.testing.ValidatesRunner;
  import org.apache.beam.sdk.values.KV;
  import org.apache.beam.sdk.values.PCollection;
  import org.apache.beam.sdk.values.TimestampedValue;
  import org.joda.time.Instant;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.experimental.categories.Category;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link ReifyTimestamps}. */
  @RunWith(JUnit4.class)
  public class ReifyTimestampsTest implements Serializable {
    @Rule public transient TestPipeline pipeline = TestPipeline.create();
  
    @Test
    @Category(ValidatesRunner.class)
    public void inValuesSucceeds() {
      PCollection<KV<String, Integer>> timestamped =
          pipeline
              .apply(Create.of(KV.of("foo", 0), KV.of("foo", 1), KV.of("bar", 2), KV.of("baz", 3)))
              .apply(WithTimestamps.of(input -> new Instant(input.getValue().longValue())));
  
      PCollection<KV<String, TimestampedValue<Integer>>> reified =
          timestamped.apply(ReifyTimestamps.inValues());
  
      PAssert.that(reified)
          .containsInAnyOrder(
              KV.of("foo", TimestampedValue.of(0, new Instant(0))),
              KV.of("foo", TimestampedValue.of(1, new Instant(1))),
              KV.of("bar", TimestampedValue.of(2, new Instant(2))),
              KV.of("baz", TimestampedValue.of(3, new Instant(3))));
  
      pipeline.run();
    }
  
    @Test
    @Category(ValidatesRunner.class)
    public void extractFromValuesSucceeds() {
      PCollection<KV<String, TimestampedValue<Integer>>> preified =
          pipeline.apply(
              Create.of(
                  KV.of("foo", TimestampedValue.of(0, new Instant(0))),
                  KV.of("foo", TimestampedValue.of(1, new Instant(1))),
                  KV.of("bar", TimestampedValue.of(2, new Instant(2))),
                  KV.of("baz", TimestampedValue.of(3, new Instant(3)))));
  
      PCollection<KV<String, Integer>> timestamped =
          preified.apply(ReifyTimestamps.extractFromValues());
  
      PAssert.that(timestamped)
          .containsInAnyOrder(KV.of("foo", 0), KV.of("foo", 1), KV.of("bar", 2), KV.of("baz", 3));
  
      timestamped.apply(
          "AssertElementTimestamps",
          ParDo.of(
              new DoFn<KV<String, Integer>, Void>() {
                @ProcessElement
                public void verifyTimestampsEqualValue(ProcessContext context) {
                  assertThat(
                      new Instant(context.element().getValue().longValue()),
                      equalTo(context.timestamp()));
                }
              }));
  
      pipeline.run();
    }
  
    @Test
    @Category(ValidatesRunner.class)
    public void extractFromValuesWhenValueTimestampedLaterSucceeds() {
      PCollection<KV<String, TimestampedValue<Integer>>> preified =
          pipeline.apply(
              Create.timestamped(
                  TimestampedValue.of(
                      KV.of("foo", TimestampedValue.of(0, new Instant(0))), new Instant(100)),
                  TimestampedValue.of(
                      KV.of("foo", TimestampedValue.of(1, new Instant(1))), new Instant(101L)),
                  TimestampedValue.of(
                      KV.of("bar", TimestampedValue.of(2, new Instant(2))), new Instant(102L)),
                  TimestampedValue.of(
                      KV.of("baz", TimestampedValue.of(3, new Instant(3))), new Instant(103L))));
  
      PCollection<KV<String, Integer>> timestamped =
          preified.apply(ReifyTimestamps.extractFromValues());
  
      PAssert.that(timestamped)
          .containsInAnyOrder(KV.of("foo", 0), KV.of("foo", 1), KV.of("bar", 2), KV.of("baz", 3));
  
      timestamped.apply(
          "AssertElementTimestamps",
          ParDo.of(
              new DoFn<KV<String, Integer>, Void>() {
                @ProcessElement
                public void verifyTimestampsEqualValue(ProcessContext context) {
                  assertThat(
                      new Instant(context.element().getValue().longValue()),
                      equalTo(context.timestamp()));
                }
              }));
  
      pipeline.run();
    }
  }
  