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/*
 * Copyright (c) 2010-2015 Pivotal Software, Inc. All rights reserved.
 *
 * 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. See accompanying
 * LICENSE file.
 */
package com.gemstone.gemfire.internal.size;

import com.gemstone.gemfire.cache.util.ObjectSizer;

import junit.framework.TestCase;
import static com.gemstone.gemfire.internal.size.SizeTestUtil.*;

/**
 * @author dsmith
 *
 */
public class WellKnownClassSizerJUnitTest extends TestCase {
  
  public void testByteArrays() {
    byte[] test1 = new byte[5];
    byte[] test2 = new byte[8];
    
    ReflectionSingleObjectSizer referenceSizer = new ReflectionSingleObjectSizer();
    
    assertEquals(referenceSizer.sizeof(test1), WellKnownClassSizer.sizeof(test1));
    assertEquals(referenceSizer.sizeof(test2), WellKnownClassSizer.sizeof(test2));
    
    assertEquals(0, WellKnownClassSizer.sizeof(new Object()));
  }
  
  public void testStrings() {
    String test1 = "123";
    String test2 = "012345678";
    
    ReflectionSingleObjectSizer referenceSizer = new ReflectionSingleObjectSizer();
    test1.toCharArray();
    
    //The size of a string varies based on the JDK version. With 1.7.0_06
    //a couple of fields were removed. So just measure the size of an empty string.
    String emptyString = "";
    int emptySize = ObjectSizer.SIZE_CLASS_ONCE.sizeof(emptyString) - ObjectSizer.SIZE_CLASS_ONCE.sizeof(new char[0]);
    
    assertEquals(emptySize + roundup(OBJECT_SIZE +4 + 3*2), WellKnownClassSizer.sizeof(test1));
    assertEquals(emptySize + roundup(OBJECT_SIZE +4 + 9*2), WellKnownClassSizer.sizeof(test2));
  }

}