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;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  
  import org.apache.beam.sdk.transforms.windowing.BoundedWindow;
  import org.apache.beam.sdk.transforms.windowing.FixedWindows;
  import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
  import org.apache.beam.sdk.transforms.windowing.IntervalWindow;
  import org.apache.beam.sdk.values.WindowingStrategy;
  import org.hamcrest.Matchers;
  import org.joda.time.Duration;
  import org.joda.time.Instant;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link LateDataUtils}. */
  @RunWith(JUnit4.class)
  public class LateDataUtilsTest {
    @Test
    public void beforeEndOfGlobalWindowSame() {
      FixedWindows windowFn = FixedWindows.of(Duration.standardMinutes(5));
      Duration allowedLateness = Duration.standardMinutes(2);
      WindowingStrategy<?, ?> strategy =
          WindowingStrategy.globalDefault()
              .withWindowFn(windowFn)
              .withAllowedLateness(allowedLateness);
  
      IntervalWindow window = windowFn.assignWindow(new Instant(10));
      assertThat(
          LateDataUtils.garbageCollectionTime(window, strategy),
          equalTo(window.maxTimestamp().plus(allowedLateness)));
    }
  
    @Test
    public void garbageCollectionTimeAfterEndOfGlobalWindow() {
      FixedWindows windowFn = FixedWindows.of(Duration.standardMinutes(5));
      WindowingStrategy<?, ?> strategy = WindowingStrategy.globalDefault().withWindowFn(windowFn);
  
      IntervalWindow window = windowFn.assignWindow(BoundedWindow.TIMESTAMP_MAX_VALUE);
      assertThat(window.maxTimestamp(), equalTo(GlobalWindow.INSTANCE.maxTimestamp()));
      assertThat(
          LateDataUtils.garbageCollectionTime(window, strategy),
          equalTo(GlobalWindow.INSTANCE.maxTimestamp()));
    }
  
    @Test
    public void garbageCollectionTimeAfterEndOfGlobalWindowWithLateness() {
      FixedWindows windowFn = FixedWindows.of(Duration.standardMinutes(5));
      Duration allowedLateness = Duration.millis(Long.MAX_VALUE);
      WindowingStrategy<?, ?> strategy =
          WindowingStrategy.globalDefault()
              .withWindowFn(windowFn)
              .withAllowedLateness(allowedLateness);
  
      IntervalWindow window = windowFn.assignWindow(new Instant(-100));
      assertThat(
          window.maxTimestamp().plus(allowedLateness),
          Matchers.greaterThan(GlobalWindow.INSTANCE.maxTimestamp()));
      assertThat(
          LateDataUtils.garbageCollectionTime(window, strategy),
          equalTo(GlobalWindow.INSTANCE.maxTimestamp()));
    }
  }
  