/**
* Copyright 2011 Google Inc.
*
* 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 org.waveprotocol.box.webclient.util;
import junit.framework.TestCase;
import org.waveprotocol.wave.client.scheduler.testing.FakeTimerService;
import java.util.ArrayList;
import java.util.List;
/**
* Tests for {@link ToppingUpPool}.
*
* @author hearnden@google.com (David Hearnden)
*/
public final class ToppingUpPoolTest extends TestCase {
/**
* Factory that remembers the objects it creates.
*/
private static class MockFactory implements ToppingUpPool.Factory<Object> {
private final List<Object> created = new ArrayList<Object>();
@Override
public Object create() {
Object o = new Object();
created.add(o);
return o;
}
void assertObjectsCreated(int i) {
assertEquals(i, created.size());
}
}
/**
* Top-up size for pool under test.
*/
private static final int RESERVE_SIZE = 10;
//
// Test objects:
//
private MockFactory factory;
private FakeTimerService timer;
private ToppingUpPool<Object> target;
@Override
protected void setUp() {
factory = new MockFactory();
timer = new FakeTimerService();
target = new ToppingUpPool<Object>(timer, factory, RESERVE_SIZE);
}
public void testWarmUpOccursAfterConstruction() {
timer.tick(1);
factory.assertObjectsCreated(RESERVE_SIZE);
}
public void testGetOnInitialStateCreatesAndWarmsUp() {
target.get();
factory.assertObjectsCreated(1);
timer.tick(1);
factory.assertObjectsCreated(RESERVE_SIZE + 1);
}
public void testWildCountZeroInitiallyAndAfterWarmup() {
assertEquals(0, target.getWildCount());
timer.tick(1);
assertEquals(0, target.getWildCount());
}
public void testGetIncreasesWildCount() {
target.get();
assertEquals(1, target.getWildCount());
target.get();
assertEquals(2, target.getWildCount());
}
public void testPutDecreasesWildCount() {
List<Object> os = new ArrayList<Object>();
int n = 6;
for (int i = 0; i < n; i++) {
os.add(target.get());
}
timer.tick(1);
for (int i = 0; i < n; i++) {
target.recycle(os.remove(0));
assertEquals(os.size(), target.getWildCount());
}
}
public void testRecycledObjectsAreReused() {
// Get 10 items, recycle them, then get 10 again, and check that the factory is not invoked.
List<Object> os = new ArrayList<Object>();
int n = 10;
for (int i = 0; i < n; i++) {
os.add(target.get());
}
for (int i = 0; i < n; i++) {
target.recycle(os.remove(0));
}
for (int i = 0; i < n; i++) {
os.add(target.get());
}
factory.assertObjectsCreated(n);
}
}