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/*
* Copyright (C) 2010 The Guava Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.common.collect.testing.testers;
import static com.google.common.collect.testing.features.CollectionSize.ONE;
import static com.google.common.collect.testing.features.CollectionSize.SEVERAL;
import static com.google.common.collect.testing.features.CollectionSize.ZERO;
import com.google.common.annotations.GwtCompatible;
import com.google.common.collect.testing.AbstractMapTester;
import com.google.common.collect.testing.Helpers;
import com.google.common.collect.testing.features.CollectionSize;
import java.util.Collections;
import java.util.List;
import java.util.Map.Entry;
import java.util.NoSuchElementException;
import java.util.SortedMap;
/**
* A generic JUnit test which tests operations on a SortedMap. Can't be
* invoked directly; please see {@code SortedMapTestSuiteBuilder}.
*
* @author Jesse Wilson
* @author Louis Wasserman
*/
@GwtCompatible
public class SortedMapNavigationTester<K, V> extends AbstractMapTester<K, V> {
private SortedMap<K, V> navigableMap;
private Entry<K, V> a;
private Entry<K, V> c;
@Override public void setUp() throws Exception {
super.setUp();
navigableMap = (SortedMap<K, V>) getMap();
List<Entry<K, V>> entries = Helpers.copyToList(getSubjectGenerator().getSampleElements(
getSubjectGenerator().getCollectionSize().getNumElements()));
Collections.sort(entries, Helpers.<K, V>entryComparator(navigableMap.comparator()));
// some tests assume SEVERAL == 3
if (entries.size() >= 1) {
a = entries.get(0);
if (entries.size() >= 3) {
c = entries.get(2);
}
}
}
@CollectionSize.Require(ZERO)
public void testEmptyMapFirst() {
try {
navigableMap.firstKey();
fail();
} catch (NoSuchElementException e) {
}
}
@CollectionSize.Require(ZERO)
public void testEmptyMapLast() {
try {
assertNull(navigableMap.lastKey());
fail();
} catch (NoSuchElementException e) {
}
}
@CollectionSize.Require(ONE)
public void testSingletonMapFirst() {
assertEquals(a.getKey(), navigableMap.firstKey());
}
@CollectionSize.Require(ONE)
public void testSingletonMapLast() {
assertEquals(a.getKey(), navigableMap.lastKey());
}
@CollectionSize.Require(SEVERAL)
public void testFirst() {
assertEquals(a.getKey(), navigableMap.firstKey());
}
@CollectionSize.Require(SEVERAL)
public void testLast() {
assertEquals(c.getKey(), navigableMap.lastKey());
}
}
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