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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;
import com.google.common.annotations.GwtCompatible;
import com.google.common.annotations.GwtIncompatible;
import com.google.common.base.Function;
import com.google.common.base.Functions;
import com.google.common.collect.SortedLists.KeyAbsentBehavior;
import com.google.common.collect.SortedLists.KeyPresentBehavior;
import com.google.common.testing.NullPointerTester;
import junit.framework.TestCase;
import java.util.List;
/**
* Tests for SortedLists.
*
* @author Louis Wasserman
*/
@GwtCompatible(emulated = true)
public class SortedListsTest extends TestCase {
private static final ImmutableList<Integer> LIST_WITH_DUPS =
ImmutableList.of(1, 1, 2, 4, 4, 4, 8);
private static final ImmutableList<Integer> LIST_WITHOUT_DUPS = ImmutableList.of(1, 2, 4, 8);
void assertModelAgrees(List<Integer> list, Integer key, int answer,
KeyPresentBehavior presentBehavior, KeyAbsentBehavior absentBehavior) {
switch (presentBehavior) {
case FIRST_PRESENT:
if (list.contains(key)) {
assertEquals(list.indexOf(key), answer);
return;
}
break;
case LAST_PRESENT:
if (list.contains(key)) {
assertEquals(list.lastIndexOf(key), answer);
return;
}
break;
case ANY_PRESENT:
if (list.contains(key)) {
assertEquals(key, list.get(answer));
return;
}
break;
case FIRST_AFTER:
if (list.contains(key)) {
assertEquals(list.lastIndexOf(key) + 1, answer);
return;
}
break;
case LAST_BEFORE:
if (list.contains(key)) {
assertEquals(list.indexOf(key) - 1, answer);
return;
}
break;
default:
throw new AssertionError();
}
// key is not present
int nextHigherIndex = list.size();
for (int i = list.size() - 1; i >= 0 && list.get(i) > key; i--) {
nextHigherIndex = i;
}
switch (absentBehavior) {
case NEXT_LOWER:
assertEquals(nextHigherIndex - 1, answer);
return;
case NEXT_HIGHER:
assertEquals(nextHigherIndex, answer);
return;
case INVERTED_INSERTION_INDEX:
assertEquals(-1 - nextHigherIndex, answer);
return;
default:
throw new AssertionError();
}
}
public void testWithoutDups() {
for (KeyPresentBehavior presentBehavior : KeyPresentBehavior.values()) {
for (KeyAbsentBehavior absentBehavior : KeyAbsentBehavior.values()) {
for (int key = 0; key <= 10; key++) {
assertModelAgrees(LIST_WITHOUT_DUPS, key,
SortedLists.binarySearch(LIST_WITHOUT_DUPS, key, presentBehavior, absentBehavior),
presentBehavior, absentBehavior);
}
}
}
}
public void testWithDups() {
for (KeyPresentBehavior presentBehavior : KeyPresentBehavior.values()) {
for (KeyAbsentBehavior absentBehavior : KeyAbsentBehavior.values()) {
for (int key = 0; key <= 10; key++) {
assertModelAgrees(LIST_WITH_DUPS, key,
SortedLists.binarySearch(LIST_WITH_DUPS, key, presentBehavior, absentBehavior),
presentBehavior, absentBehavior);
}
}
}
}
@GwtIncompatible("NullPointerTester")
public void testNulls() throws Exception {
NullPointerTester tester = new NullPointerTester();
tester.setDefault(Function.class, Functions.identity());
tester.setDefault(List.class, LIST_WITH_DUPS);
tester.setDefault(Comparable.class, 2);
tester.setDefault(KeyPresentBehavior.class, KeyPresentBehavior.ANY_PRESENT);
tester.setDefault(KeyAbsentBehavior.class, KeyAbsentBehavior.NEXT_HIGHER);
tester.testAllPublicStaticMethods(SortedLists.class);
}
}
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