/*
    * 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 com.google.common.annotations.GwtCompatible;
  
  import junit.framework.TestCase;
  
  /**
   * Unit tests for {@link HashMultimap}.
   *
   * @author Jared Levy
   */
  @GwtCompatible(emulated = true)
  public class HashMultimapTest extends TestCase {
  
    /*
     * The behavior of toString() is tested by TreeMultimap, which shares a
     * lot of code with HashMultimap and has deterministic iteration order.
     */
    public void testCreate() {
      HashMultimap<String, Integer> multimap = HashMultimap.create();
      multimap.put("foo", 1);
      multimap.put("bar", 2);
      multimap.put("foo", 3);
      assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
      assertEquals(2, multimap.expectedValuesPerKey);
    }
  
    public void testCreateFromMultimap() {
      HashMultimap<String, Integer> multimap = HashMultimap.create();
      multimap.put("foo", 1);
      multimap.put("bar", 2);
      multimap.put("foo", 3);
      HashMultimap<String, Integer> copy = HashMultimap.create(multimap);
      assertEquals(multimap, copy);
      assertEquals(2, copy.expectedValuesPerKey);
    }
  
    public void testCreateFromSizes() {
      HashMultimap<String, Integer> multimap = HashMultimap.create(20, 15);
      multimap.put("foo", 1);
      multimap.put("bar", 2);
      multimap.put("foo", 3);
      assertEquals(ImmutableSet.of(1, 3), multimap.get("foo"));
      assertEquals(15, multimap.expectedValuesPerKey);
    }
  
    public void testCreateFromIllegalSizes() {
      try {
        HashMultimap.create(-20, 15);
        fail();
      } catch (IllegalArgumentException expected) {}
  
      try {
        HashMultimap.create(20, -15);
        fail();
      } catch (IllegalArgumentException expected) {}
    }
  
    public void testEmptyMultimapsEqual() {
      Multimap<String, Integer> setMultimap = HashMultimap.create();
      Multimap<String, Integer> listMultimap = ArrayListMultimap.create();
      assertTrue(setMultimap.equals(listMultimap));
      assertTrue(listMultimap.equals(setMultimap));
    }
  }