001/*
002 * Copyright (C) 2015 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_KEY_QUERIES;
021import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUES;
022import static com.google.common.collect.testing.features.MapFeature.ALLOWS_NULL_VALUE_QUERIES;
023import static com.google.common.collect.testing.features.MapFeature.SUPPORTS_PUT;
024
025import com.google.common.annotations.GwtCompatible;
026import com.google.common.collect.testing.AbstractMapTester;
027import com.google.common.collect.testing.features.CollectionSize;
028import com.google.common.collect.testing.features.MapFeature;
029import java.util.Map;
030import org.junit.Ignore;
031
032/**
033 * A generic JUnit test which tests {@link Map#replace(Object, Object)}. Can't be invoked directly;
034 * please see {@link com.google.common.collect.testing.ConcurrentMapTestSuiteBuilder}.
035 *
036 * @author Louis Wasserman
037 */
038@GwtCompatible
039@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
040@SuppressWarnings("JUnit4ClassUsedInJUnit3")
041public class MapReplaceTester<K, V> extends AbstractMapTester<K, V> {
042
043  @MapFeature.Require(SUPPORTS_PUT)
044  @CollectionSize.Require(absent = ZERO)
045  public void testReplace_supportedPresent() {
046    try {
047      assertEquals(v0(), getMap().replace(k0(), v3()));
048      expectReplacement(entry(k0(), v3()));
049    } catch (ClassCastException tolerated) { // for ClassToInstanceMap
050      expectUnchanged();
051    }
052  }
053
054  @MapFeature.Require(SUPPORTS_PUT)
055  @CollectionSize.Require(absent = ZERO)
056  public void testReplace_supportedPresentNoChange() {
057    assertEquals(v0(), getMap().replace(k0(), v0()));
058    expectUnchanged();
059  }
060
061  @MapFeature.Require(SUPPORTS_PUT)
062  public void testReplace_supportedAbsent() {
063    assertNull(getMap().replace(k3(), v3()));
064    expectUnchanged();
065  }
066
067  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
068  @CollectionSize.Require(absent = ZERO)
069  public void testReplace_presentNullValueUnsupported() {
070    try {
071      getMap().replace(k0(), null);
072      fail("Expected NullPointerException");
073    } catch (NullPointerException expected) {
074    }
075    expectUnchanged();
076  }
077
078  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUE_QUERIES)
079  public void testReplace_absentNullValueUnsupported() {
080    try {
081      getMap().replace(k3(), null);
082    } catch (NullPointerException tolerated) {
083      // permitted not to throw because it would be a no-op
084    }
085    expectUnchanged();
086  }
087
088  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_KEY_QUERIES)
089  public void testReplace_absentNullKeyUnsupported() {
090    try {
091      getMap().replace(null, v3());
092    } catch (NullPointerException tolerated) {
093      // permitted not to throw because it would be a no-op
094    }
095    expectUnchanged();
096  }
097
098  @MapFeature.Require(absent = SUPPORTS_PUT)
099  @CollectionSize.Require(absent = ZERO)
100  public void testReplace_unsupportedPresent() {
101    try {
102      getMap().replace(k0(), v3());
103      fail("Expected UnsupportedOperationException");
104    } catch (UnsupportedOperationException expected) {
105    } catch (ClassCastException tolerated) {
106      // for ClassToInstanceMap
107    }
108
109    expectUnchanged();
110  }
111}