geode-core/src/test/java/org/apache/geode/internal/size/ObjectSizerJUnitTest.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 limitations under
 * the License.
 */
package org.apache.geode.internal.size;

import static org.apache.geode.internal.size.SizeTestUtil.OBJECT_SIZE;
import static org.apache.geode.internal.size.SizeTestUtil.REFERENCE_SIZE;
import static org.apache.geode.internal.size.SizeTestUtil.roundup;
import static org.junit.Assert.assertEquals;

import org.junit.Test;


public class ObjectSizerJUnitTest {

  @Test
  public void test() throws Exception {
    assertEquals(roundup(OBJECT_SIZE), ObjectGraphSizer.size(new Object()));

    assertEquals(roundup(OBJECT_SIZE + 4), ObjectGraphSizer.size(new TestObject1()));
    assertEquals(roundup(OBJECT_SIZE + 4), ObjectGraphSizer.size(new TestObject2()));
    assertEquals(roundup(OBJECT_SIZE), ObjectGraphSizer.size(new TestObject3()));
    assertEquals(roundup(OBJECT_SIZE * 2 + REFERENCE_SIZE),
        ObjectGraphSizer.size(new TestObject3(), true));
    assertEquals(roundup(OBJECT_SIZE + REFERENCE_SIZE), ObjectGraphSizer.size(new TestObject4()));
    assertEquals(roundup(OBJECT_SIZE + REFERENCE_SIZE) + roundup(OBJECT_SIZE + 4),
        ObjectGraphSizer.size(new TestObject5()));
    assertEquals(roundup(OBJECT_SIZE + REFERENCE_SIZE)
        + roundup(OBJECT_SIZE + REFERENCE_SIZE * 4 + 4) + roundup(OBJECT_SIZE + 4),
        ObjectGraphSizer.size(new TestObject6()));
    assertEquals(roundup(OBJECT_SIZE + 7), ObjectGraphSizer.size(new TestObject7()));
  }

  private static class TestObject1 {
    int a;
  }

  private static class TestObject2 {
    int a;
  }

  private static class TestObject3 {
    static TestObject1 a = new TestObject1();
  }

  private static class TestObject4 {
    TestObject1 object = null;
  }

  private static class TestObject5 {
    TestObject1 object = new TestObject1();
  }

  private static class TestObject6 {
    TestObject1[] array = new TestObject1[4];

    public TestObject6() {
      array[3] = new TestObject1();
      array[2] = array[3];
    }
  }

  private static class TestObject7 {
    byte b1;
    byte b2;
    byte b3;
    byte b4;
    byte b5;
    byte b6;
    byte b7;
  }
}