package org.apache.ibatis.cache;
import org.apache.ibatis.cache.decorators.SerializedCache;
import org.apache.ibatis.cache.decorators.SoftCache;
import org.apache.ibatis.cache.impl.PerpetualCache;
import static org.junit.Assert.*;
import org.junit.Test;
public class SoftCacheTest {
@Test
public void shouldDemonstrateObjectsBeingCollectedAsNeeded() throws Exception {
final int N = 3000000;
SoftCache cache = new SoftCache(new PerpetualCache("default"));
for (int i = 0; i < N; i++) {
byte[] array = new byte[5001]; //waste a bunch of memory
array[5000] = 1;
cache.putObject(i, array);
Object value = cache.getObject(i);
if (cache.getSize() < i + 1) {
//System.out.println("Cache exceeded with " + (i + 1) + " entries.");
break;
}
}
assertTrue(cache.getSize() < N);
}
@Test
public void shouldDemonstrateCopiesAreEqual() {
Cache cache = new SoftCache(new PerpetualCache("default"));
cache = new SerializedCache(cache);
for (int i = 0; i < 1000; i++) {
cache.putObject(i, i);
Object value = cache.getObject(i);
assertTrue(value == null || value.equals(i));
}
}
@Test
public void shouldRemoveItemOnDemand() {
Cache cache = new SoftCache(new PerpetualCache("default"));
cache.putObject(0, 0);
assertNotNull(cache.getObject(0));
cache.removeObject(0);
assertNull(cache.getObject(0));
}
@Test
public void shouldFlushAllItemsOnDemand() {
Cache cache = new SoftCache(new PerpetualCache("default"));
for (int i = 0; i < 5; i++) {
cache.putObject(i, i);
}
assertNotNull(cache.getObject(0));
assertNotNull(cache.getObject(4));
cache.clear();
assertNull(cache.getObject(0));
assertNull(cache.getObject(4));
}
}