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.hadoopbackport;
019
020import static org.junit.Assert.assertEquals;
021
022import org.apache.hadoop.hbase.HBaseClassTestRule;
023import org.apache.hadoop.hbase.testclassification.MiscTests;
024import org.apache.hadoop.hbase.testclassification.SmallTests;
025import org.junit.ClassRule;
026import org.junit.Test;
027import org.junit.experimental.categories.Category;
028
029@Category({ MiscTests.class, SmallTests.class })
030public class TestThrottledInputStream {
031
032  @ClassRule
033  public static final HBaseClassTestRule CLASS_RULE =
034    HBaseClassTestRule.forClass(TestThrottledInputStream.class);
035
036  @Test
037  public void testCalSleepTimeMs() {
038    // case 0: initial - no read, no sleep
039    assertEquals(0, ThrottledInputStream.calSleepTimeMs(0, 10000, 1000));
040
041    // case 1: no threshold
042    assertEquals(0, ThrottledInputStream.calSleepTimeMs(Long.MAX_VALUE, 0, 1000));
043    assertEquals(0, ThrottledInputStream.calSleepTimeMs(Long.MAX_VALUE, -1, 1000));
044
045    // case 2: too fast
046    assertEquals(1500, ThrottledInputStream.calSleepTimeMs(5, 2, 1000));
047    assertEquals(500, ThrottledInputStream.calSleepTimeMs(5, 2, 2000));
048    assertEquals(6500, ThrottledInputStream.calSleepTimeMs(15, 2, 1000));
049
050    // case 3: too slow
051    assertEquals(0, ThrottledInputStream.calSleepTimeMs(1, 2, 1000));
052    assertEquals(0, ThrottledInputStream.calSleepTimeMs(2, 2, 2000));
053    assertEquals(0, ThrottledInputStream.calSleepTimeMs(1, 2, 1000));
054  }
055
056}