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      1 /*
      2  * Copyright (C) 2012 The Guava Authors
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  * http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.google.common.collect.testing.google;
     18 
     19 import static com.google.common.collect.testing.features.CollectionSize.ZERO;
     20 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEYS;
     21 import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_KEY_QUERIES;
     22 
     23 import com.google.common.annotations.GwtCompatible;
     24 import com.google.common.collect.Multimap;
     25 import com.google.common.collect.testing.features.CollectionSize;
     26 import com.google.common.collect.testing.features.MapFeature;
     27 
     28 /**
     29  * Tester for the {@code containsKey} methods of {@code Multimap} and its {@code asMap()} view.
     30  *
     31  * @author Louis Wasserman
     32  */
     33 @GwtCompatible
     34 public class MultimapContainsKeyTester<K, V>
     35     extends AbstractMultimapTester<K, V, Multimap<K, V>> {
     36   @CollectionSize.Require(absent = ZERO)
     37   public void testContainsKeyYes() {
     38     assertTrue(multimap().containsKey(sampleKeys().e0));
     39   }
     40 
     41   public void testContainsKeyNo() {
     42     assertFalse(multimap().containsKey(sampleKeys().e3));
     43   }
     44 
     45   public void testContainsKeysFromKeySet() {
     46     for (K k : multimap().keySet()) {
     47       assertTrue(multimap().containsKey(k));
     48     }
     49   }
     50 
     51   public void testContainsKeyAgreesWithGet() {
     52     for (K k : sampleKeys()) {
     53       assertEquals(!multimap().get(k).isEmpty(), multimap().containsKey(k));
     54     }
     55   }
     56 
     57   public void testContainsKeyAgreesWithAsMap() {
     58     for (K k : sampleKeys()) {
     59       assertEquals(multimap().containsKey(k), multimap().asMap().containsKey(k));
     60     }
     61   }
     62 
     63   public void testContainsKeyAgreesWithKeySet() {
     64     for (K k : sampleKeys()) {
     65       assertEquals(multimap().containsKey(k), multimap().keySet().contains(k));
     66     }
     67   }
     68 
     69   @MapFeature.Require(ALLOWS_NULL_KEYS)
     70   @CollectionSize.Require(absent = ZERO)
     71   public void testContainsKeyNullPresent() {
     72     initMultimapWithNullKey();
     73     assertTrue(multimap().containsKey(null));
     74   }
     75 
     76   @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
     77   public void testContainsKeyNullAbsent() {
     78     assertFalse(multimap().containsKey(null));
     79   }
     80 
     81   @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
     82   public void testContainsKeyNullDisallowed() {
     83     try {
     84       multimap().containsKey(null);
     85       fail("Expected NullPointerException");
     86     } catch (NullPointerException expected) {
     87       // success
     88     }
     89   }
     90 }
     91