001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.io.asyncfs;
019
020import static org.junit.jupiter.api.Assertions.assertEquals;
021
022import org.apache.hadoop.hbase.testclassification.MiscTests;
023import org.apache.hadoop.hbase.testclassification.SmallTests;
024import org.junit.jupiter.api.Tag;
025import org.junit.jupiter.api.Test;
026
027@Tag(MiscTests.TAG)
028@Tag(SmallTests.TAG)
029public class TestSendBufSizePredictor {
030
031  @Test
032  public void test() {
033    SendBufSizePredictor p = new SendBufSizePredictor();
034    assertEquals(8 * 1024, p.guess(5 * 1024));
035    assertEquals(8 * 1024, p.guess(5 * 1024));
036    assertEquals(16 * 1024, p.guess(10 * 1024));
037    // it wont reduce directly to 4KB
038    assertEquals(8 * 1024, p.guess(4 * 1024));
039    // This time it will reduece
040    assertEquals(4 * 1024, p.guess(4 * 1024));
041  }
042}