/*
    * Copyright (C) 2013 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.testing.google;
  
  import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
  import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
  import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
  import static com.google.common.truth.Truth.assertThat;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.Multimap;
  import com.google.common.collect.testing.Helpers;
  import com.google.common.collect.testing.features.MapFeature;
  
  import java.util.Collection;
  
  /**
   * Tester for {@link Multimap#putAll(Multimap)}.
   *
   * @author Louis Wasserman
   */
  @GwtCompatible
  public class MultimapPutAllMultimapTester<K, V>
      extends AbstractMultimapTester<K, V, Multimap<K, V>> {
    @MapFeature.Require(absent = SUPPORTS_PUT)
    public void testPutUnsupported() {
      try {
        multimap().putAll(getSubjectGenerator().create(
            Helpers.mapEntry(sampleKeys().e3, sampleValues().e3)));
        fail("Expected UnsupportedOperationException");
      } catch (UnsupportedOperationException expected) {}
    }
    
    @MapFeature.Require(SUPPORTS_PUT)
    public void testPutAllIntoEmpty() {
      Multimap<K, V> target = getSubjectGenerator().create();
      assertEquals(!multimap().isEmpty(), target.putAll(multimap()));
      assertEquals(multimap(), target);    
    }
    
    @MapFeature.Require(SUPPORTS_PUT)
    public void testPutAll() {
      Multimap<K, V> source = getSubjectGenerator().create(
          Helpers.mapEntry(sampleKeys().e0, sampleValues().e3),
          Helpers.mapEntry(sampleKeys().e3, sampleValues().e3));
      assertTrue(multimap().putAll(source));
      assertTrue(multimap().containsEntry(sampleKeys().e0, sampleValues().e3));
      assertTrue(multimap().containsEntry(sampleKeys().e3, sampleValues().e3));
    }
    
    @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_VALUES})
    public void testPutAllWithNullValue() {
      Multimap<K, V> source = getSubjectGenerator().create(
          Helpers.mapEntry(sampleKeys().e0, null));
      assertTrue(multimap().putAll(source));
      assertTrue(multimap().containsEntry(sampleKeys().e0, null));
    }
    
    @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
    public void testPutAllWithNullKey() {
      Multimap<K, V> source = getSubjectGenerator().create(
          Helpers.mapEntry(null, sampleValues().e0));
      assertTrue(multimap().putAll(source));
      assertTrue(multimap().containsEntry(null, sampleValues().e0));
    }
    
    @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
    public void testPutAllRejectsNullValue() {
      Multimap<K, V> source = getSubjectGenerator().create(
          Helpers.mapEntry(sampleKeys().e0, null));
      try {
        multimap().putAll(source);
        fail("Expected NullPointerException");
      } catch (NullPointerException expected) {}
      expectUnchanged();
    }
    
    @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEYS)
    public void testPutAllRejectsNullKey() {
      Multimap<K, V> source = getSubjectGenerator().create(
          Helpers.mapEntry(null, sampleValues().e0));
      try {
        multimap().putAll(source);
        fail("Expected NullPointerException");
      } catch (NullPointerException expected) {}
     expectUnchanged();
   }
 
   @MapFeature.Require(SUPPORTS_PUT)
   public void testPutAllPropagatesToGet() {
     Multimap<K, V> source = getSubjectGenerator().create(
         Helpers.mapEntry(sampleKeys().e0, sampleValues().e3),
         Helpers.mapEntry(sampleKeys().e3, sampleValues().e3));
     Collection<V> getCollection = multimap().get(sampleKeys().e0);
     int getCollectionSize = getCollection.size();
     assertTrue(multimap().putAll(source));
     assertEquals(getCollectionSize + 1, getCollection.size());
     assertThat(getCollection).has().allOf(sampleValues().e3);
   }
 }