/*
    * 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_KEY_QUERIES;
  import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
  import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
  
  import com.google.common.annotations.GwtCompatible;
  import com.google.common.collect.Multimap;
  import com.google.common.collect.testing.features.CollectionSize;
  import com.google.common.collect.testing.features.MapFeature;
  
  /**
   * Tester for {@link Multimap#containsEntry}.
   *
   * @author Louis Wasserman
   */
  @GwtCompatible
  public class MultimapContainsEntryTester<K, V>
      extends AbstractMultimapTester<K, V, Multimap<K, V>> {
    @CollectionSize.Require(absent = ZERO)
    public void testContainsEntryYes() {
      assertTrue(multimap().containsEntry(sampleKeys().e0, sampleValues().e0));
    }
  
    public void testContainsEntryNo() {
      assertFalse(multimap().containsEntry(sampleKeys().e3, sampleValues().e3));
    }
  
    public void testContainsEntryAgreesWithGet() {
      for (K k : sampleKeys()) {
        for (V v : sampleValues()) {
          assertEquals(multimap().get(k).contains(v),
              multimap().containsEntry(k, v));
        }
      }
    }
  
    @CollectionSize.Require(absent = ZERO)
    @MapFeature.Require({ ALLOWS_NULL_KEYS, ALLOWS_NULL_VALUES })
    public void testContainsEntryNullYes() {
      initMultimapWithNullKeyAndValue();
      assertTrue(multimap().containsEntry(null, null));
    }
  
    @MapFeature.Require({ ALLOWS_NULL_KEY_QUERIES, ALLOWS_NULL_VALUE_QUERIES })
    public void testContainsEntryNullNo() {
      assertFalse(multimap().containsEntry(null, null));
    }
  
    @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
    public void testContainsEntryNullDisallowedBecauseKeyQueriesDisallowed() {
      try {
        multimap().containsEntry(null, sampleValues().e3);
        fail("Expected NullPointerException");
      } catch (NullPointerException expected) {
        // success
      }
    }
  
    /**
     * Copy of the {@link #testContainsEntryNullDisallowed} test. Needed because
     * "optional" feature requirements are not supported.
     */
    @MapFeature.Require(absent = ALLOWS_NULL_VALUE_QUERIES)
    public void testContainsEntryNullDisallowedBecauseValueQueriesDisallowed() {
      try {
        multimap().containsEntry(sampleKeys().e3, null);
        fail("Expected NullPointerException");
      } catch (NullPointerException expected) {
        // success
      }
    }
  }