/*
    * 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 com.google.common.truth.Truth.assertThat;
  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 junit.framework.Test;
  import junit.framework.TestCase;
  import junit.framework.TestSuite;
  
  import java.util.Arrays;
  import java.util.List;
  
  /**
   * Unit test for {@link LinkedHashMultiset}.
   *
   * @author Kevin Bourrillion
   */
  @GwtCompatible(emulated = true)
  public class LinkedHashMultisetTest extends TestCase {
  
    @GwtIncompatible("suite")
    public static Test suite() {
      TestSuite suite = new TestSuite();
      suite.addTest(MultisetTestSuiteBuilder.using(linkedHashMultisetGenerator())
          .named("LinkedHashMultiset")
          .withFeatures(CollectionSize.ANY,
              CollectionFeature.KNOWN_ORDER,
              CollectionFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,
              CollectionFeature.ALLOWS_NULL_VALUES,
              CollectionFeature.SERIALIZABLE,
              CollectionFeature.GENERAL_PURPOSE,
              MultisetFeature.ENTRIES_ARE_VIEWS)
          .createTestSuite());
      suite.addTestSuite(LinkedHashMultisetTest.class);
      return suite;
    }
  
    private static TestStringMultisetGenerator linkedHashMultisetGenerator() {
      return new TestStringMultisetGenerator() {
        @Override protected Multiset<String> create(String[] elements) {
          return LinkedHashMultiset.create(asList(elements));
        }
  
        @Override
        public List<String> order(List<String> insertionOrder) {
          List<String> order = Lists.newArrayList();
          for (String s : insertionOrder) {
            int index = order.indexOf(s);
            if (index == -1) {
              order.add(s);
            } else {
              order.add(index, s);
            }
          }
          return order;
        }
      };
    }
  
    public void testCreate() {
      Multiset<String> multiset = LinkedHashMultiset.create();
      multiset.add("foo", 2);
      multiset.add("bar");
      assertEquals(3, multiset.size());
      assertEquals(2, multiset.count("foo"));
      assertEquals("[foo x 2, bar]", multiset.toString());
    }
  
    public void testCreateWithSize() {
      Multiset<String> multiset = LinkedHashMultiset.create(50);
      multiset.add("foo", 2);
      multiset.add("bar");
      assertEquals(3, multiset.size());
      assertEquals(2, multiset.count("foo"));
      assertEquals("[foo x 2, bar]", multiset.toString());
   }
 
   public void testCreateFromIterable() {
     Multiset<String> multiset
         = LinkedHashMultiset.create(Arrays.asList("foo", "bar", "foo"));
     assertEquals(3, multiset.size());
     assertEquals(2, multiset.count("foo"));
     assertEquals("[foo x 2, bar]", multiset.toString());
   }
 
   public void testToString() {
     Multiset<String> ms = LinkedHashMultiset.create();
     ms.add("a", 3);
     ms.add("c", 1);
     ms.add("b", 2);
 
     assertEquals("[a x 3, c, b x 2]", ms.toString());
   }
 
   public void testLosesPlaceInLine() throws Exception {
     Multiset<String> ms = LinkedHashMultiset.create();
     ms.add("a");
     ms.add("b", 2);
     ms.add("c");
     assertThat(ms.elementSet()).has().exactly("a", "b", "c").inOrder();
     ms.remove("b");
     assertThat(ms.elementSet()).has().exactly("a", "b", "c").inOrder();
     ms.add("b");
     assertThat(ms.elementSet()).has().exactly("a", "b", "c").inOrder();
     ms.remove("b", 2);
     ms.add("b");
     assertThat(ms.elementSet()).has().exactly("a", "c", "b").inOrder();
   }
 }