001/*
002 * Copyright (C) 2012 The Guava Authors
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package com.google.common.collect.testing.google;
018
019import static com.google.common.collect.testing.features.CollectionSize.ZERO;
020import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
021import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
022
023import com.google.common.annotations.GwtCompatible;
024import com.google.common.collect.Multimap;
025import com.google.common.collect.testing.features.CollectionSize;
026import com.google.common.collect.testing.features.MapFeature;
027
028/**
029 * Tester for the {@code containsKey} methods of {@code Multimap} and its {@code asMap()} view.
030 *
031 * @author Louis Wasserman
032 */
033@GwtCompatible
034public class MultimapContainsKeyTester<K, V> extends AbstractMultimapTester<K, V, Multimap<K, V>> {
035  @CollectionSize.Require(absent = ZERO)
036  public void testContainsKeyYes() {
037    assertTrue(multimap().containsKey(k0()));
038  }
039
040  public void testContainsKeyNo() {
041    assertFalse(multimap().containsKey(k3()));
042  }
043
044  public void testContainsKeysFromKeySet() {
045    for (K k : multimap().keySet()) {
046      assertTrue(multimap().containsKey(k));
047    }
048  }
049
050  public void testContainsKeyAgreesWithGet() {
051    for (K k : sampleKeys()) {
052      assertEquals(!multimap().get(k).isEmpty(), multimap().containsKey(k));
053    }
054  }
055
056  public void testContainsKeyAgreesWithAsMap() {
057    for (K k : sampleKeys()) {
058      assertEquals(multimap().containsKey(k), multimap().asMap().containsKey(k));
059    }
060  }
061
062  public void testContainsKeyAgreesWithKeySet() {
063    for (K k : sampleKeys()) {
064      assertEquals(multimap().containsKey(k), multimap().keySet().contains(k));
065    }
066  }
067
068  @MapFeature.Require(ALLOWS_NULL_KEYS)
069  @CollectionSize.Require(absent = ZERO)
070  public void testContainsKeyNullPresent() {
071    initMultimapWithNullKey();
072    assertTrue(multimap().containsKey(null));
073  }
074
075  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
076  public void testContainsKeyNullAbsent() {
077    assertFalse(multimap().containsKey(null));
078  }
079
080  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
081  public void testContainsKeyNullDisallowed() {
082    try {
083      multimap().containsKey(null);
084      fail("Expected NullPointerException");
085    } catch (NullPointerException expected) {
086      // success
087    }
088  }
089}