/* 
 * 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.parquet.bytes;

import static org.junit.Assert.assertEquals;
import static org.apache.parquet.bytes.BytesUtils.getWidthFromMaxInt;

import org.junit.Test;

public class TestBytesUtil {

  @Test
  public void testWidth() {
    assertEquals(0, getWidthFromMaxInt(0));
    assertEquals(1, getWidthFromMaxInt(1));
    assertEquals(2, getWidthFromMaxInt(2));
    assertEquals(2, getWidthFromMaxInt(3));
    assertEquals(3, getWidthFromMaxInt(4));
    assertEquals(3, getWidthFromMaxInt(5));
    assertEquals(3, getWidthFromMaxInt(6));
    assertEquals(3, getWidthFromMaxInt(7));
    assertEquals(4, getWidthFromMaxInt(8));
    assertEquals(4, getWidthFromMaxInt(15));
    assertEquals(5, getWidthFromMaxInt(16));
    assertEquals(5, getWidthFromMaxInt(31));
    assertEquals(6, getWidthFromMaxInt(32));
    assertEquals(6, getWidthFromMaxInt(63));
    assertEquals(7, getWidthFromMaxInt(64));
    assertEquals(7, getWidthFromMaxInt(127));
    assertEquals(8, getWidthFromMaxInt(128));
    assertEquals(8, getWidthFromMaxInt(255));
  }
}
