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package com.android.camera.gallery;
import android.test.AndroidTestCase;
import android.util.Log;
public class LruCacheUnitTests extends AndroidTestCase {
public void testPut() {
LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(2);
Integer key = Integer.valueOf(1);
Integer value = Integer.valueOf(3);
cache.put(key, value);
assertEquals(value, cache.get(key));
}
public void testTracingInUsedObject() {
LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(2);
Integer key = Integer.valueOf(1);
Integer value = new Integer(3);
cache.put(key, value);
for (int i = 0; i < 3; ++i) {
cache.put(i + 10, i * i);
}
System.gc();
assertEquals(value, cache.get(key));
}
public void testLruAlgorithm() {
LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(2);
cache.put(0, new Integer(0));
for (int i = 0; i < 3; ++i) {
cache.put(i + 1, i * i);
cache.get(0);
}
System.gc();
assertEquals(Integer.valueOf(0), cache.get(0));
}
private static final int TEST_COUNT = 10000;
static class Accessor extends Thread {
private final LruCache<Integer,Integer> mMap;
public Accessor(LruCache<Integer, Integer> map) {
mMap = map;
}
@Override
public void run() {
Log.v("TAG", "start get " + this);
for (int i = 0; i < TEST_COUNT; ++i) {
mMap.get(i % 2);
}
Log.v("TAG", "finish get " + this);
}
}
@SuppressWarnings("unchecked")
public void testConcurrentAccess() throws Exception {
LruCache<Integer, Integer> cache = new LruCache<Integer, Integer>(4);
cache.put(0, 0);
cache.put(1, 1);
Accessor accessor[] = new Accessor[4];
for (int i = 0; i < accessor.length; ++i) {
accessor[i] = new Accessor(cache);
}
for (int i = 0; i < accessor.length; ++i) {
accessor[i].start();
}
for (int i = 0; i < accessor.length; ++i) {
accessor[i].join();
}
}
}
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