1 package com.android.camera.gallery; 2 3 import android.test.AndroidTestCase; 4 import android.util.Log; 5 6 public class LruCacheUnitTests extends AndroidTestCase { 7 8 public void testPut() { 9 LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(2); 10 Integer key = Integer.valueOf(1); 11 Integer value = Integer.valueOf(3); 12 cache.put(key, value); 13 assertEquals(value, cache.get(key)); 14 } 15 16 public void testTracingInUsedObject() { 17 LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(2); 18 Integer key = Integer.valueOf(1); 19 Integer value = new Integer(3); 20 cache.put(key, value); 21 for (int i = 0; i < 3; ++i) { 22 cache.put(i + 10, i * i); 23 } 24 System.gc(); 25 assertEquals(value, cache.get(key)); 26 } 27 28 public void testLruAlgorithm() { 29 LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(2); 30 cache.put(0, new Integer(0)); 31 for (int i = 0; i < 3; ++i) { 32 cache.put(i + 1, i * i); 33 cache.get(0); 34 } 35 System.gc(); 36 assertEquals(Integer.valueOf(0), cache.get(0)); 37 } 38 39 private static final int TEST_COUNT = 10000; 40 41 static class Accessor extends Thread { 42 private final LruCache<Integer,Integer> mMap; 43 44 public Accessor(LruCache<Integer, Integer> map) { 45 mMap = map; 46 } 47 48 @Override 49 public void run() { 50 Log.v("TAG", "start get " + this); 51 for (int i = 0; i < TEST_COUNT; ++i) { 52 mMap.get(i % 2); 53 } 54 Log.v("TAG", "finish get " + this); 55 } 56 } 57 58 @SuppressWarnings("unchecked") 59 public void testConcurrentAccess() throws Exception { 60 LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(4); 61 cache.put(0, 0); 62 cache.put(1, 1); 63 Accessor accessor[] = new Accessor[4]; 64 for (int i = 0; i < accessor.length; ++i) { 65 accessor[i] = new Accessor(cache); 66 } 67 for (int i = 0; i < accessor.length; ++i) { 68 accessor[i].start(); 69 } 70 for (int i = 0; i < accessor.length; ++i) { 71 accessor[i].join(); 72 } 73 } 74 } 75
