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.samza.util;
  
  import static org.mockito.Mockito.mock;
  
  import java.util.Set;
  import org.apache.beam.sdk.transforms.Combine;
  import org.apache.beam.sdk.transforms.Count;
  import org.apache.beam.sdk.transforms.MapElements;
  import org.apache.beam.sdk.transforms.Max;
  import org.apache.beam.sdk.transforms.Min;
  import org.apache.beam.sdk.transforms.SerializableFunction;
  import org.apache.beam.vendor.guava.v32_1_2_jre.com.google.common.collect.ImmutableSet;
  import org.junit.Assert;
  import org.junit.Test;
  
  /** Test class for {@link HashIdGenerator}. */
  public class TestHashIdGenerator {
  
    @Test
    public void testGetId() {
      final HashIdGenerator idGenerator = new HashIdGenerator();
      final Set<String> ids =
          ImmutableSet.of(
              idGenerator.getId(Count.perKey().getName()),
              idGenerator.getId(MapElements.into(null).getName()),
              idGenerator.getId(Count.globally().getName()),
              idGenerator.getId(Combine.perKey(mock(SerializableFunction.class)).getName()),
              idGenerator.getId(Min.perKey().getName()),
              idGenerator.getId(Max.globally().getName()));
      Assert.assertEquals(6, ids.size());
    }
  
    @Test
    public void testGetShortId() {
      final HashIdGenerator idGenerator = new HashIdGenerator();
      String id = idGenerator.getId("abcd");
      Assert.assertEquals("abcd", id);
    }
  
    @Test
    public void testSameNames() {
      final HashIdGenerator idGenerator = new HashIdGenerator();
      String id1 = idGenerator.getId(Count.perKey().getName());
      String id2 = idGenerator.getId(Count.perKey().getName());
      Assert.assertNotEquals(id1, id2);
    }
  
    @Test
    public void testSameShortNames() {
      final HashIdGenerator idGenerator = new HashIdGenerator();
      String id = idGenerator.getId("abcd");
      Assert.assertEquals("abcd", id);
      String id2 = idGenerator.getId("abcd");
      Assert.assertNotEquals("abcd", id2);
    }
  
    @Test
    public void testLongHash() {
      final HashIdGenerator idGenerator = new HashIdGenerator(10);
      String id1 = idGenerator.getId(Count.perKey().getName());
      String id2 = idGenerator.getId(Count.perKey().getName());
      String id3 = idGenerator.getId(Count.perKey().getName());
      String id4 = idGenerator.getId(Count.perKey().getName());
      Assert.assertNotEquals(id1, id2);
      Assert.assertNotEquals(id3, id2);
      Assert.assertNotEquals(id3, id4);
    }
  }
  