001/*
002 * Copyright (C) 2008 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.testers;
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.testing.AbstractMapTester;
025import com.google.common.collect.testing.WrongType;
026import com.google.common.collect.testing.features.CollectionSize;
027import com.google.common.collect.testing.features.MapFeature;
028import org.junit.Ignore;
029
030/**
031 * A generic JUnit test which tests {@code containsKey()} operations on a map. Can't be invoked
032 * directly; please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}.
033 *
034 * @author George van den Driessche
035 */
036@GwtCompatible
037@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
038public class MapContainsKeyTester<K, V> extends AbstractMapTester<K, V> {
039  @CollectionSize.Require(absent = ZERO)
040  public void testContains_yes() {
041    assertTrue("containsKey(present) should return true", getMap().containsKey(k0()));
042  }
043
044  public void testContains_no() {
045    assertFalse("containsKey(notPresent) should return false", getMap().containsKey(k3()));
046  }
047
048  @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES)
049  public void testContains_nullNotContainedButAllowed() {
050    assertFalse("containsKey(null) should return false", getMap().containsKey(null));
051  }
052
053  @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES)
054  public void testContains_nullNotContainedAndUnsupported() {
055    expectNullKeyMissingWhenNullKeysUnsupported("containsKey(null) should return false or throw");
056  }
057
058  @MapFeature.Require(ALLOWS_NULL_KEYS)
059  @CollectionSize.Require(absent = ZERO)
060  public void testContains_nonNullWhenNullContained() {
061    initMapWithNullKey();
062    assertFalse("containsKey(notPresent) should return false", getMap().containsKey(k3()));
063  }
064
065  @MapFeature.Require(ALLOWS_NULL_KEYS)
066  @CollectionSize.Require(absent = ZERO)
067  public void testContains_nullContained() {
068    initMapWithNullKey();
069    assertTrue("containsKey(null) should return true", getMap().containsKey(null));
070  }
071
072  public void testContains_wrongType() {
073    try {
074      // noinspection SuspiciousMethodCalls
075      assertFalse(
076          "containsKey(wrongType) should return false or throw",
077          getMap().containsKey(WrongType.VALUE));
078    } catch (ClassCastException tolerated) {
079    }
080  }
081}