001/* 002 * Copyright (C) 2007 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 get} operations on a map. Can't be invoked directly; 032 * please see {@link com.google.common.collect.testing.MapTestSuiteBuilder}. 033 * 034 * @author Kevin Bourrillion 035 * @author Chris Povirk 036 */ 037@GwtCompatible 038@Ignore // Affects only Android test runner, which respects JUnit 4 annotations on JUnit 3 tests. 039public class MapGetTester<K, V> extends AbstractMapTester<K, V> { 040 @CollectionSize.Require(absent = ZERO) 041 public void testGet_yes() { 042 assertEquals("get(present) should return the associated value", v0(), get(k0())); 043 } 044 045 public void testGet_no() { 046 assertNull("get(notPresent) should return null", get(k3())); 047 } 048 049 @MapFeature.Require(ALLOWS_NULL_KEY_QUERIES) 050 public void testGet_nullNotContainedButAllowed() { 051 assertNull("get(null) should return null", get(null)); 052 } 053 054 @MapFeature.Require(absent = ALLOWS_NULL_KEY_QUERIES) 055 public void testGet_nullNotContainedAndUnsupported() { 056 try { 057 assertNull("get(null) should return null or throw", get(null)); 058 } catch (NullPointerException tolerated) { 059 } 060 } 061 062 @MapFeature.Require(ALLOWS_NULL_KEYS) 063 @CollectionSize.Require(absent = ZERO) 064 public void testGet_nonNullWhenNullContained() { 065 initMapWithNullKey(); 066 assertNull("get(notPresent) should return null", get(k3())); 067 } 068 069 @MapFeature.Require(ALLOWS_NULL_KEYS) 070 @CollectionSize.Require(absent = ZERO) 071 public void testGet_nullContained() { 072 initMapWithNullKey(); 073 assertEquals("get(null) should return the associated value", getValueForNullKey(), get(null)); 074 } 075 076 public void testGet_wrongType() { 077 try { 078 assertNull("get(wrongType) should return null or throw", getMap().get(WrongType.VALUE)); 079 } catch (ClassCastException tolerated) { 080 } 081 } 082}