hbase-server/src/test/java/org/apache/hadoop/hbase/TestSize.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.hadoop.hbase;

import static org.junit.Assert.assertEquals;

import java.util.Set;
import java.util.TreeSet;
import org.apache.hadoop.hbase.testclassification.MiscTests;
import org.apache.hadoop.hbase.testclassification.SmallTests;
import org.junit.ClassRule;
import org.junit.Test;
import org.junit.experimental.categories.Category;

@Category({MiscTests.class, SmallTests.class})
public class TestSize {

  @ClassRule
  public static final HBaseClassTestRule CLASS_RULE =
      HBaseClassTestRule.forClass(TestSize.class);

  @Test
  public void testConversion() {
    Size kbSize = new Size(1024D, Size.Unit.MEGABYTE);
    assertEquals(1D, kbSize.get(Size.Unit.GIGABYTE), 0);
    assertEquals(1024D, kbSize.get(), 0);
    assertEquals(1024D * 1024D, kbSize.get(Size.Unit.KILOBYTE), 0);
    assertEquals(1024D * 1024D * 1024D, kbSize.get(Size.Unit.BYTE), 0);
  }

  @Test
  public void testCompare() {
    Size size00 = new Size(100D, Size.Unit.GIGABYTE);
    Size size01 = new Size(100D, Size.Unit.MEGABYTE);
    Size size02 = new Size(100D, Size.Unit.BYTE);
    Set<Size> sizes = new TreeSet<>();
    sizes.add(size00);
    sizes.add(size01);
    sizes.add(size02);
    int count = 0;
    for (Size s : sizes) {
      switch (count++) {
        case 0:
          assertEquals(size02, s);
          break;
        case 1:
          assertEquals(size01, s);
          break;
        default:
          assertEquals(size00, s);
          break;
      }
    }
    assertEquals(3, count);
  }

  @Test
  public void testEqual() {
    assertEquals(new Size(1024D, Size.Unit.TERABYTE),
      new Size(1D, Size.Unit.PETABYTE));
    assertEquals(new Size(1024D, Size.Unit.GIGABYTE),
      new Size(1D, Size.Unit.TERABYTE));
    assertEquals(new Size(1024D, Size.Unit.MEGABYTE),
      new Size(1D, Size.Unit.GIGABYTE));
    assertEquals(new Size(1024D, Size.Unit.KILOBYTE),
      new Size(1D, Size.Unit.MEGABYTE));
    assertEquals(new Size(1024D, Size.Unit.BYTE),
      new Size(1D, Size.Unit.KILOBYTE));
  }

}