hbase-server/src/test/java/org/apache/hadoop/hbase/TestTagRewriteCell.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
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package org.apache.hadoop.hbase;

import static org.junit.Assert.assertTrue;

import org.apache.hadoop.hbase.io.HeapSize;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.apache.hadoop.hbase.util.Bytes;
import org.junit.Test;
import org.junit.experimental.categories.Category;

@Category(SmallTests.class)
public class TestTagRewriteCell {

  @Test
  public void testHeapSize() {
    Cell originalCell = CellUtil.createCell(Bytes.toBytes("row"), Bytes.toBytes("value"));
    final int fakeTagArrayLength = 10;
    Cell trCell = CellUtil.createCell(originalCell, new byte[fakeTagArrayLength]);

    // Get the heapSize before the internal tags array in trCell are nuked
    long trCellHeapSize = ((HeapSize)trCell).heapSize();

    // Make another TagRewriteCell with the original TagRewriteCell
    // This happens on systems with more than one RegionObserver/Coproc loaded (such as
    // VisibilityController and AccessController)
    Cell trCell2 = CellUtil.createCell(trCell, new byte[fakeTagArrayLength]);

    assertTrue("TagRewriteCell containing a TagRewriteCell's heapsize should be larger than a " +
        "single TagRewriteCell's heapsize", trCellHeapSize < ((HeapSize)trCell2).heapSize());
    assertTrue("TagRewriteCell should have had nulled out tags array", ((HeapSize)trCell).heapSize() <
        trCellHeapSize);
  }
}