/*
    * Copyright (C) 2012 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.CollectionSize.ZERO;
  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.collect.testing.features.MapFeature.SUPPORTS_REMOVE;
  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.CollectionSize;
  import com.google.common.collect.testing.features.MapFeature;
  
  import java.util.ArrayList;
  import java.util.Arrays;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.List;
  
  /**
   * Tests for {@link Multimap#replaceValues(Object, Iterable)}.
   *
   * @author Louis Wasserman
   */
  @GwtCompatible
  public class MultimapReplaceValuesTester<K, V>
      extends AbstractMultimapTester<K, V, Multimap<K, V>> {
  
    @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE, ALLOWS_NULL_VALUES})
    public void testReplaceValuesWithNullValue() {
      int size = multimap().size();
      K key = sampleKeys().e0;
      @SuppressWarnings("unchecked")
      List<V> values = Arrays.asList(sampleValues().e0, null, sampleValues().e3);
      multimap().replaceValues(key, values);
      assertGet(key, values);
    }
    
    @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE, ALLOWS_NULL_KEYS})
    public void testReplaceValuesWithNullKey() {
      int size = multimap().size();
      K key = null;
      @SuppressWarnings("unchecked")
      List<V> values = Arrays.asList(sampleValues().e0, sampleValues().e2, sampleValues().e3);
      multimap().replaceValues(key, values);
      assertGet(key, values);
    }
    
    @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
    public void testReplaceEmptyValues() {
      int size = multimap().size();
      K key = sampleKeys().e3;
      @SuppressWarnings("unchecked")
      List<V> values = Arrays.asList(sampleValues().e0, sampleValues().e2, sampleValues().e3);
      multimap().replaceValues(key, values);
      assertGet(key, values);
      assertEquals(size + values.size(), multimap().size());
    }
    
    @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
    public void testReplaceValuesWithEmpty() {
      int size = multimap().size();
      K key = sampleKeys().e0;
      List<V> oldValues = new ArrayList<V>(multimap().get(key));
      @SuppressWarnings("unchecked")
      List<V> values = Collections.emptyList();
      assertEquals(oldValues, new ArrayList<V>(multimap().replaceValues(key, values)));
      assertGet(key);
      assertEquals(size - oldValues.size(), multimap().size());
    }
    
    @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
    public void testReplaceValuesWithDuplicates() {
      int size = multimap().size();
      K key = sampleKeys().e0;
      List<V> oldValues = new ArrayList<V>(multimap().get(key));
      List<V> values = Arrays.asList(
          sampleValues().e0,
          sampleValues().e3,
          sampleValues().e0);
      assertEquals(oldValues, new ArrayList<V>(multimap().replaceValues(key, values)));
     assertEquals(
         size - oldValues.size() + multimap().get(key).size(),
         multimap().size());
     assertTrue(multimap().get(key).containsAll(values));
   }
 
   @CollectionSize.Require(absent = ZERO)
   @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
   public void testReplaceNonEmptyValues() {
     List<K> keys = Helpers.copyToList(multimap().keySet());
     @SuppressWarnings("unchecked")
     List<V> values = Arrays.asList(sampleValues().e0, sampleValues().e2, sampleValues().e3);
 
     for (K k : keys) {
       resetContainer();
 
       int size = multimap().size();
       Collection<V> oldKeyValues = Helpers.copyToList(multimap().get(k));
       multimap().replaceValues(k, values);
       assertGet(k, values);
       assertEquals(size + values.size() - oldKeyValues.size(), multimap().size());
     }
   }
   
   @MapFeature.Require({SUPPORTS_PUT, SUPPORTS_REMOVE})
   public void testReplaceValuesPropagatesToGet() {
     K key = sampleKeys().e0;
     Collection<V> getCollection = multimap().get(key);
     @SuppressWarnings("unchecked")
     List<V> values = Arrays.asList(sampleValues().e0, sampleValues().e2, sampleValues().e3);
     multimap().replaceValues(key, values);
     assertThat(getCollection).has().exactly(
         sampleValues().e0, sampleValues().e2, sampleValues().e3);
   }
 
   @MapFeature.Require(absent = SUPPORTS_REMOVE)
   @CollectionSize.Require(absent = ZERO)
   public void testReplaceValuesRemoveNotSupported() {
     List<V> values = Collections.singletonList(sampleValues().e3);
     try {
       multimap().replaceValues(sampleKeys().e0, values);
       fail("Expected UnsupportedOperationException");
     } catch (UnsupportedOperationException expected) {
       // success
     }
   }
 
   @MapFeature.Require(absent = SUPPORTS_PUT)
   public void testReplaceValuesPutNotSupported() {
     List<V> values = Collections.singletonList(sampleValues().e3);
     try {
       multimap().replaceValues(sampleKeys().e0, values);
       fail("Expected UnsupportedOperationException");
     } catch (UnsupportedOperationException expected) {
       // success
     }
   }
 }