94 lines
3.2 KiB
Java
94 lines
3.2 KiB
Java
/*
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* Copyright (C) 2016 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.graph;
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import static com.google.common.truth.Truth.assertThat;
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import com.google.common.collect.Ordering;
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import java.util.Arrays;
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import java.util.Collection;
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import java.util.Comparator;
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import java.util.HashMap;
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import java.util.TreeMap;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.junit.runners.Parameterized;
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import org.junit.runners.Parameterized.Parameters;
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/** Tests for {@link MapIteratorCache} and {@link MapRetrievalCache}. */
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@AndroidIncompatible
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// TODO(cpovirk): Figure out Android JUnit 4 support. Does it work with Gingerbread? @RunWith?
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@RunWith(Parameterized.class)
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public final class MapCacheTest {
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private final MapIteratorCache<String, String> mapCache;
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public MapCacheTest(MapIteratorCache<String, String> mapCache) {
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this.mapCache = mapCache;
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}
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@Parameters
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public static Collection<Object[]> parameters() {
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Comparator<String> nullsLast = Ordering.natural().nullsLast();
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return Arrays.asList(
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new Object[][] {
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{new MapIteratorCache<String, String>(new HashMap<String, String>())},
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{new MapIteratorCache<String, String>(new TreeMap<String, String>(nullsLast))},
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{new MapRetrievalCache<String, String>(new HashMap<String, String>())},
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{new MapRetrievalCache<String, String>(new TreeMap<String, String>(nullsLast))}
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});
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}
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@Before
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public void init() {
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mapCache.clear();
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}
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@Test
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public void testKeySetIterator() {
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mapCache.put("A", "A_value");
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mapCache.put("B", "B_value");
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mapCache.put("C", "C_value");
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assertThat(mapCache.unmodifiableKeySet()).hasSize(3);
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for (String key : mapCache.unmodifiableKeySet()) {
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assertThat(mapCache.get(key)).isEqualTo(key + "_value");
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}
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}
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@Test
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public void testPutNewValue() {
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assertThat(mapCache.put("key", "value")).isNull();
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assertThat(mapCache.get("key")).isEqualTo("value"); // ensure key/value is cached
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assertThat(mapCache.put("key", "new value")).isEqualTo("value");
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assertThat(mapCache.get("key")).isEqualTo("new value");
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}
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@Test
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public void testRemoveEqualKeyWithDifferentReference() {
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String fooReference1 = new String("foo");
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String fooReference2 = new String("foo");
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assertThat(fooReference1).isNotSameInstanceAs(fooReference2);
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assertThat(mapCache.put(fooReference1, "bar")).isNull();
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assertThat(mapCache.get(fooReference1)).isEqualTo("bar"); // ensure first reference is cached
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assertThat(mapCache.remove(fooReference2)).isEqualTo("bar");
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assertThat(mapCache.get(fooReference1)).isNull();
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}
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}
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