content: /*
   * The Alluxio Open Foundation licenses this work under the Apache License, version 2.0
   * (the "License"). You may not use this work except in compliance with the License, which is
   * available at www.apache.org/licenses/LICENSE-2.0
   *
   * This software is distributed on an "AS IS" basis, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
   * either express or implied, as more fully set forth in the License.
   *
   * See the NOTICE file distributed with this work for information regarding copyright ownership.
   */
  
  package alluxio.client.file.cache.cuckoofilter;
  
  import static org.junit.Assert.assertEquals;
  
  import org.junit.Before;
  import org.junit.Test;
  
  public class SizeEncoderTest {
    private SizeEncoder mSizeEncoder;
    private static final int PREFIX_BITS = 8;
    private static final int SUFFIX_BITS = 12;
  
    @Before
    public void beforeTest() {
      mSizeEncoder = new SizeEncoder(PREFIX_BITS + SUFFIX_BITS, PREFIX_BITS);
    }
  
    @Test
    public void testEncode() {
      int sizeBits = PREFIX_BITS + SUFFIX_BITS;
      for (int i = 0; i < sizeBits; i++) {
        int size = 1 << i;
        int encodedSize = mSizeEncoder.encode(size);
        assertEquals(encodedSize, (size >> SUFFIX_BITS));
      }
    }
  
    @Test
    public void testDecode() {
      int sizeBits = PREFIX_BITS + SUFFIX_BITS;
      for (int i = SUFFIX_BITS; i < sizeBits; i++) {
        int size = 1 << i;
        mSizeEncoder.add(size);
        int encodedSize = mSizeEncoder.encode(size);
        int decodedSize = mSizeEncoder.dec(encodedSize);
        assertEquals(decodedSize, size);
      }
    }
  }
  