/*
    * Copyright (C) 2007 The Guava Authors
    *
    * Licensed 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 com.google.common.collect;
  
  import static java.util.Arrays.asList;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.annotations.GwtIncompatible;
  import com.google.common.collect.testing.features.CollectionFeature;
  import com.google.common.collect.testing.features.CollectionSize;
  import com.google.common.collect.testing.google.MultisetFeature;
  import com.google.common.collect.testing.google.MultisetTestSuiteBuilder;
  import com.google.common.collect.testing.google.TestStringMultisetGenerator;
  import com.google.common.testing.SerializableTester;
  
  import junit.framework.Test;
  import junit.framework.TestCase;
  import junit.framework.TestSuite;
  
  import java.io.Serializable;
  import java.util.Arrays;
  
  /**
   * Unit test for {@link HashMultiset}.
   *
   * @author Kevin Bourrillion
   * @author Jared Levy
   */
  @GwtCompatible(emulated = true)
  public class HashMultisetTest extends TestCase {
  
    @GwtIncompatible("suite")
    public static Test suite() {
      TestSuite suite = new TestSuite();
      suite.addTest(MultisetTestSuiteBuilder.using(hashMultisetGenerator())
          .withFeatures(CollectionSize.ANY,
              CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
              CollectionFeature.ALLOWS_NULL_VALUES,
              CollectionFeature.SERIALIZABLE,
              CollectionFeature.GENERAL_PURPOSE,
              MultisetFeature.ENTRIES_ARE_VIEWS)
          .named("HashMultiset")
          .createTestSuite());
      suite.addTestSuite(HashMultisetTest.class);
      return suite;
    }
  
    private static TestStringMultisetGenerator hashMultisetGenerator() {
      return new TestStringMultisetGenerator() {
        @Override protected Multiset<String> create(String[] elements) {
          return HashMultiset.create(asList(elements));
        }
      };
    }
  
    public void testCreate() {
      Multiset<String> multiset = HashMultiset.create();
      multiset.add("foo", 2);
      multiset.add("bar");
      assertEquals(3, multiset.size());
      assertEquals(2, multiset.count("foo"));
    }
  
    public void testCreateWithSize() {
      Multiset<String> multiset = HashMultiset.create(50);
      multiset.add("foo", 2);
      multiset.add("bar");
      assertEquals(3, multiset.size());
      assertEquals(2, multiset.count("foo"));
    }
  
    public void testCreateFromIterable() {
      Multiset<String> multiset
          = HashMultiset.create(Arrays.asList("foo", "bar", "foo"));
      assertEquals(3, multiset.size());
      assertEquals(2, multiset.count("foo"));
    }
  
    @GwtIncompatible("SerializableTester")
    public void testSerializationContainingSelf() {
      Multiset<Multiset<?>> multiset = HashMultiset.create();
      multiset.add(multiset, 2);
      Multiset<Multiset<?>> copy = SerializableTester.reserialize(multiset);
      assertEquals(2, copy.size());
      assertSame(copy, copy.iterator().next());
   }
 
   @GwtIncompatible("Only used by @GwtIncompatible code")
   private static class MultisetHolder implements Serializable {
     public Multiset<?> member;
     MultisetHolder(Multiset<?> multiset) {
       this.member = multiset;
     }
     private static final long serialVersionUID = 1L;
   }
 
   @GwtIncompatible("SerializableTester")
   public void testSerializationIndirectSelfReference() {
     Multiset<MultisetHolder> multiset = HashMultiset.create();
     MultisetHolder holder = new MultisetHolder(multiset);
     multiset.add(holder, 2);
     Multiset<MultisetHolder> copy = SerializableTester.reserialize(multiset);
     assertEquals(2, copy.size());
     assertSame(copy, copy.iterator().next().member);
   }
 
   /*
    * The behavior of toString() and iteration is tested by LinkedHashMultiset,
    * which shares a lot of code with HashMultiset and has deterministic
    * iteration order.
    */
 }