1 /* 2 * Copyright (C) 2007 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.util; 18 19 import junit.framework.TestCase; 20 21 import java.util.HashMap; 22 import java.util.Iterator; 23 import java.util.Map; 24 import java.util.Random; 25 26 /** 27 * Tests for {@link LongSparseLongArray}. 28 */ 29 public class LongSparseLongArrayTest extends TestCase { 30 private static final String TAG = "LongSparseLongArrayTest"; 31 testSimplePut()32 public void testSimplePut() throws Exception { 33 final LongSparseLongArray array = new LongSparseLongArray(5); 34 for (int i = 0; i < 48; i++) { 35 final long value = 1 << i; 36 array.put(value, value); 37 } 38 for (int i = 0; i < 48; i++) { 39 final long value = 1 << i; 40 assertEquals(value, array.get(value, -1)); 41 assertEquals(-1, array.get(-value, -1)); 42 } 43 } 44 testSimplePutBackwards()45 public void testSimplePutBackwards() throws Exception { 46 final LongSparseLongArray array = new LongSparseLongArray(5); 47 for (int i = 47; i >= 0; i--) { 48 final long value = 1 << i; 49 array.put(value, value); 50 } 51 for (int i = 0; i < 48; i++) { 52 final long value = 1 << i; 53 assertEquals(value, array.get(value, -1)); 54 assertEquals(-1, array.get(-value, -1)); 55 } 56 } 57 testMiddleInsert()58 public void testMiddleInsert() throws Exception { 59 final LongSparseLongArray array = new LongSparseLongArray(5); 60 for (int i = 0; i < 48; i++) { 61 final long value = 1 << i; 62 array.put(value, value); 63 } 64 final long special = (1 << 24) + 5; 65 array.put(special, 1024); 66 for (int i = 0; i < 48; i++) { 67 final long value = 1 << i; 68 assertEquals(value, array.get(value, -1)); 69 assertEquals(-1, array.get(-value, -1)); 70 } 71 assertEquals(1024, array.get(special, -1)); 72 } 73 testFuzz()74 public void testFuzz() throws Exception { 75 final Random r = new Random(); 76 77 final HashMap<Long, Long> map = new HashMap<Long, Long>(); 78 final LongSparseLongArray array = new LongSparseLongArray(r.nextInt(128)); 79 80 for (int i = 0; i < 10240; i++) { 81 if (r.nextBoolean()) { 82 final long key = r.nextLong(); 83 final long value = r.nextLong(); 84 map.put(key, value); 85 array.put(key, value); 86 } 87 if (r.nextBoolean() && map.size() > 0) { 88 final int index = r.nextInt(map.size()); 89 final long key = getKeyAtIndex(map, index); 90 map.remove(key); 91 array.delete(key); 92 } 93 } 94 95 Log.d(TAG, "verifying a map with " + map.size() + " entries"); 96 97 for (Map.Entry<Long, Long> e : map.entrySet()) { 98 final long key = e.getKey(); 99 final long value = e.getValue(); 100 assertEquals(value, array.get(key)); 101 } 102 } 103 getKeyAtIndex(Map<E, ?> map, int index)104 private static <E> E getKeyAtIndex(Map<E, ?> map, int index) { 105 final Iterator<E> keys = map.keySet().iterator(); 106 for (int i = 0; i < index; i++) { 107 keys.next(); 108 } 109 return keys.next(); 110 } 111 } 112