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 org.apache.beam.sdk.coders.StringUtf8Coder;
  import org.apache.beam.sdk.coders.VarIntCoder;
  import org.apache.beam.sdk.state.BagState;
  import org.apache.beam.sdk.state.CombiningState;
  import org.apache.beam.sdk.state.MapState;
  import org.apache.beam.sdk.state.SetState;
  import org.apache.beam.sdk.state.State;
  import org.apache.beam.sdk.state.ValueState;
  import org.apache.beam.sdk.state.WatermarkHoldState;
  import org.apache.beam.sdk.transforms.Sum;
  import org.apache.beam.sdk.transforms.windowing.TimestampCombiner;
  import org.hamcrest.Matchers;
  import org.junit.Test;
  import org.junit.runner.RunWith;
  import org.junit.runners.JUnit4;
  
  /** Tests for {@link InMemoryStateInternals}. This is based on {@link StateInternalsTest}. */
  public class InMemoryStateInternalsTest {
  
    /** A standard StateInternals test. */
    @RunWith(JUnit4.class)
    public static class StandardStateInternalsTests extends StateInternalsTest {
      @Override
      protected StateInternals createStateInternals() {
        return new InMemoryStateInternals<>("dummyKey");
      }
    }
  
    /** A specific test of InMemoryStateInternals. */
    @RunWith(JUnit4.class)
    public static class OtherTests {
  
      private static final StateNamespace NAMESPACE = new StateNamespaceForTest("ns");
  
      private static final StateTag<ValueState<String>> STRING_VALUE_ADDR =
          StateTags.value("stringValue", StringUtf8Coder.of());
      private static final StateTag<CombiningState<Integer, int[], Integer>> SUM_INTEGER_ADDR =
          StateTags.combiningValueFromInputInternal("sumInteger", VarIntCoder.of(), Sum.ofIntegers());
      private static final StateTag<BagState<String>> STRING_BAG_ADDR =
          StateTags.bag("stringBag", StringUtf8Coder.of());
      private static final StateTag<SetState<String>> STRING_SET_ADDR =
          StateTags.set("stringSet", StringUtf8Coder.of());
      private static final StateTag<MapState<String, Integer>> STRING_MAP_ADDR =
          StateTags.map("stringMap", StringUtf8Coder.of(), VarIntCoder.of());
      private static final StateTag<WatermarkHoldState> WATERMARK_EARLIEST_ADDR =
          StateTags.watermarkStateInternal("watermark", TimestampCombiner.EARLIEST);
  
      StateInternals underTest = new InMemoryStateInternals<>("dummyKey");
  
      @Test
      public void testSameInstance() {
        assertSameInstance(STRING_VALUE_ADDR);
        assertSameInstance(SUM_INTEGER_ADDR);
        assertSameInstance(STRING_BAG_ADDR);
        assertSameInstance(STRING_SET_ADDR);
        assertSameInstance(STRING_MAP_ADDR);
        assertSameInstance(WATERMARK_EARLIEST_ADDR);
      }
  
      private <T extends State> void assertSameInstance(StateTag<T> address) {
        assertThat(
            underTest.state(NAMESPACE, address),
            Matchers.sameInstance(underTest.state(NAMESPACE, address)));
      }
    }
  }
  