/*
    * 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 junit.framework.TestCase;
  
  import java.util.ConcurrentModificationException;
  import java.util.List;
  import java.util.RandomAccess;
  
  /**
   * Unit tests for {@code ArrayListMultimap}.
   *
   * @author Jared Levy
   */
  @GwtCompatible(emulated = true)
  public class ArrayListMultimapTest extends TestCase {
  
    protected ListMultimap<String, Integer> create() {
      return ArrayListMultimap.create();
    }
  
    /**
     * Confirm that get() returns a List implementing RandomAccess.
     */
    public void testGetRandomAccess() {
      Multimap<String, Integer> multimap = create();
      multimap.put("foo", 1);
      multimap.put("foo", 3);
      assertTrue(multimap.get("foo") instanceof RandomAccess);
      assertTrue(multimap.get("bar") instanceof RandomAccess);
    }
  
    /**
     * Confirm that removeAll() returns a List implementing RandomAccess.
     */
    public void testRemoveAllRandomAccess() {
      Multimap<String, Integer> multimap = create();
      multimap.put("foo", 1);
      multimap.put("foo", 3);
      assertTrue(multimap.removeAll("foo") instanceof RandomAccess);
      assertTrue(multimap.removeAll("bar") instanceof RandomAccess);
    }
  
    /**
     * Confirm that replaceValues() returns a List implementing RandomAccess.
     */
    public void testReplaceValuesRandomAccess() {
      Multimap<String, Integer> multimap = create();
      multimap.put("foo", 1);
      multimap.put("foo", 3);
      assertTrue(multimap.replaceValues("foo", asList(2, 4))
          instanceof RandomAccess);
      assertTrue(multimap.replaceValues("bar", asList(2, 4))
          instanceof RandomAccess);
    }
  
    /**
     * Test throwing ConcurrentModificationException when a sublist's ancestor's
     * delegate changes.
     */
    public void testSublistConcurrentModificationException() {
      ListMultimap<String, Integer> multimap = create();
      multimap.putAll("foo", asList(1, 2, 3, 4, 5));
      List<Integer> list = multimap.get("foo");
      assertThat(multimap.get("foo")).has().exactly(1, 2, 3, 4, 5).inOrder();
      List<Integer> sublist = list.subList(0, 5);
      assertThat(sublist).has().exactly(1, 2, 3, 4, 5).inOrder();
  
      sublist.clear();
      assertTrue(sublist.isEmpty());
      multimap.put("foo", 6);
  
      try {
        sublist.isEmpty();
        fail("Expected ConcurrentModificationException");
      } catch (ConcurrentModificationException expected) {}
    }
  
    public void testCreateFromMultimap() {
     Multimap<String, Integer> multimap = create();
     multimap.put("foo", 1);
     multimap.put("foo", 3);
     multimap.put("bar", 2);
     ArrayListMultimap<String, Integer> copy
         = ArrayListMultimap.create(multimap);
     assertEquals(multimap, copy);
   }
 
   public void testCreate() {
     ArrayListMultimap<String, Integer> multimap
         = ArrayListMultimap.create();
     assertEquals(3, multimap.expectedValuesPerKey);
   }
 
   public void testCreateFromSizes() {
     ArrayListMultimap<String, Integer> multimap
         = ArrayListMultimap.create(15, 20);
     assertEquals(20, multimap.expectedValuesPerKey);
   }
 
   public void testCreateFromIllegalSizes() {
     try {
       ArrayListMultimap.create(15, -2);
       fail();
     } catch (IllegalArgumentException expected) {}
 
     try {
       ArrayListMultimap.create(-15, 2);
       fail();
     } catch (IllegalArgumentException expected) {}
   }
 
   public void testCreateFromHashMultimap() {
     Multimap<String, Integer> original = HashMultimap.create();
     ArrayListMultimap<String, Integer> multimap
         = ArrayListMultimap.create(original);
     assertEquals(3, multimap.expectedValuesPerKey);
   }
 
   public void testCreateFromArrayListMultimap() {
     ArrayListMultimap<String, Integer> original
         = ArrayListMultimap.create(15, 20);
     ArrayListMultimap<String, Integer> multimap
         = ArrayListMultimap.create(original);
     assertEquals(20, multimap.expectedValuesPerKey);
   }
 
   public void testTrimToSize() {
     ArrayListMultimap<String, Integer> multimap
         = ArrayListMultimap.create();
     multimap.put("foo", 1);
     multimap.put("foo", 2);
     multimap.put("bar", 3);
     multimap.trimToSize();
     assertEquals(3, multimap.size());
     assertThat(multimap.get("foo")).has().exactly(1, 2).inOrder();
     assertThat(multimap.get("bar")).has().item(3);
   }
 }