/*
*
* Copyright 2013 Netflix, 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 com.netflix.zeno.fastblob.state;
import com.netflix.zeno.fastblob.state.FreeOrdinalTracker;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import org.junit.Assert;
import org.junit.Test;
public class FreeOrdinalTrackerTest {
@Test
public void returnsIncreasingOrdinals() {
FreeOrdinalTracker tracker = new FreeOrdinalTracker();
for(int i=0;i<100;i++) {
Assert.assertEquals(i, tracker.getFreeOrdinal());
}
}
@Test
public void returnsOrdinalsPreviouslyReturnedToPool() {
FreeOrdinalTracker tracker = new FreeOrdinalTracker();
for(int i=0;i<100;i++) {
tracker.getFreeOrdinal();
}
tracker.returnOrdinalToPool(20);
tracker.returnOrdinalToPool(30);
tracker.returnOrdinalToPool(40);
Assert.assertEquals(40, tracker.getFreeOrdinal());
Assert.assertEquals(30, tracker.getFreeOrdinal());
Assert.assertEquals(20, tracker.getFreeOrdinal());
Assert.assertEquals(100, tracker.getFreeOrdinal());
Assert.assertEquals(101, tracker.getFreeOrdinal());
}
@Test
public void serializesAndDeserializes() throws IOException {
FreeOrdinalTracker tracker = new FreeOrdinalTracker();
for(int i=0;i<100;i++) {
tracker.getFreeOrdinal();
}
tracker.returnOrdinalToPool(20);
tracker.returnOrdinalToPool(30);
tracker.returnOrdinalToPool(40);
ByteArrayOutputStream baos = new ByteArrayOutputStream();
tracker.serializeTo(baos);
FreeOrdinalTracker deserializedTracker = FreeOrdinalTracker.deserializeFrom(new ByteArrayInputStream(baos.toByteArray()));
Assert.assertEquals(40, deserializedTracker.getFreeOrdinal());
Assert.assertEquals(30, deserializedTracker.getFreeOrdinal());
Assert.assertEquals(20, deserializedTracker.getFreeOrdinal());
Assert.assertEquals(100, deserializedTracker.getFreeOrdinal());
Assert.assertEquals(101, deserializedTracker.getFreeOrdinal());
}
}