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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.
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  package org.apache.beam.runners.core;
  
  import org.apache.beam.runners.core.TimerInternals.TimerData;
  import org.apache.beam.sdk.coders.StringUtf8Coder;
  import org.apache.beam.sdk.coders.VarIntCoder;
  import org.apache.beam.sdk.state.TimeDomain;
  import org.apache.beam.sdk.testing.CoderProperties;
  import org.apache.beam.sdk.transforms.windowing.GlobalWindow;
  import org.apache.beam.sdk.values.WindowedValue;
  import org.apache.beam.sdk.values.WindowedValues;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableList;
  import org.joda.time.Instant;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link KeyedWorkItems}. */
  @RunWith(JUnit4.class)
  public class KeyedWorkItemCoderTest {
    @Test
    public void testCoderProperties() throws Exception {
      CoderProperties.coderSerializable(
          KeyedWorkItemCoder.of(StringUtf8Coder.of(), VarIntCoder.of(), GlobalWindow.Coder.INSTANCE));
    }
  
    @Test
    public void testEncodeDecodeEqual() throws Exception {
      Iterable<TimerData> timers =
          ImmutableList.of(
              TimerData.of(
                  StateNamespaces.global(),
                  new Instant(500L),
                  new Instant(500L),
                  TimeDomain.EVENT_TIME));
      Iterable<WindowedValue<Integer>> elements =
          ImmutableList.of(
              WindowedValues.valueInGlobalWindow(1),
              WindowedValues.valueInGlobalWindow(4),
              WindowedValues.valueInGlobalWindow(8));
  
      KeyedWorkItemCoder<String, Integer> coder =
          KeyedWorkItemCoder.of(StringUtf8Coder.of(), VarIntCoder.of(), GlobalWindow.Coder.INSTANCE);
  
      CoderProperties.coderDecodeEncodeEqual(coder, KeyedWorkItems.workItem("foo", timers, elements));
      CoderProperties.coderDecodeEncodeEqual(coder, KeyedWorkItems.elementsWorkItem("foo", elements));
      CoderProperties.coderDecodeEncodeEqual(coder, KeyedWorkItems.timersWorkItem("foo", timers));
    }
  
    @Test
    public void testCoderIsSerializableWithWellKnownCoderType() throws Exception {
      CoderProperties.coderSerializable(
          KeyedWorkItemCoder.of(
              GlobalWindow.Coder.INSTANCE, GlobalWindow.Coder.INSTANCE, GlobalWindow.Coder.INSTANCE));
    }
  }
  