Jonathan Hart | 233a18a | 2015-03-02 17:24:58 -0800 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2015-present Open Networking Foundation |
Jonathan Hart | 233a18a | 2015-03-02 17:24:58 -0800 | [diff] [blame] | 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.onlab.util; |
| 17 | |
| 18 | import org.junit.After; |
| 19 | import org.junit.Before; |
| 20 | import org.junit.Test; |
| 21 | |
| 22 | import static junit.framework.TestCase.fail; |
| 23 | import static org.junit.Assert.assertEquals; |
| 24 | import static org.junit.Assert.assertTrue; |
| 25 | |
| 26 | /** |
| 27 | * Unit tests for the sliding window counter. |
| 28 | */ |
Jonathan Hart | 233a18a | 2015-03-02 17:24:58 -0800 | [diff] [blame] | 29 | public class SlidingWindowCounterTest { |
| 30 | |
| 31 | private SlidingWindowCounter counter; |
| 32 | |
| 33 | @Before |
| 34 | public void setUp() { |
| 35 | counter = new SlidingWindowCounter(2); |
| 36 | } |
| 37 | |
| 38 | @After |
| 39 | public void tearDown() { |
| 40 | counter.destroy(); |
| 41 | } |
| 42 | |
| 43 | @Test |
| 44 | public void testIncrementCount() { |
| 45 | assertEquals(0, counter.get(1)); |
| 46 | assertEquals(0, counter.get(2)); |
| 47 | counter.incrementCount(); |
| 48 | assertEquals(1, counter.get(1)); |
| 49 | assertEquals(1, counter.get(2)); |
| 50 | counter.incrementCount(2); |
| 51 | assertEquals(3, counter.get(2)); |
| 52 | } |
| 53 | |
| 54 | @Test |
| 55 | public void testSlide() { |
| 56 | counter.incrementCount(); |
| 57 | counter.advanceHead(); |
| 58 | assertEquals(0, counter.get(1)); |
| 59 | assertEquals(1, counter.get(2)); |
| 60 | counter.incrementCount(2); |
| 61 | assertEquals(2, counter.get(1)); |
| 62 | assertEquals(3, counter.get(2)); |
| 63 | } |
| 64 | |
| 65 | @Test |
| 66 | public void testWrap() { |
| 67 | counter.incrementCount(); |
| 68 | counter.advanceHead(); |
| 69 | counter.incrementCount(2); |
| 70 | counter.advanceHead(); |
| 71 | assertEquals(0, counter.get(1)); |
| 72 | assertEquals(2, counter.get(2)); |
| 73 | counter.advanceHead(); |
| 74 | assertEquals(0, counter.get(1)); |
| 75 | assertEquals(0, counter.get(2)); |
| 76 | |
| 77 | } |
| 78 | |
| 79 | @Test |
Jordan Halterman | d7e7f98 | 2019-04-11 15:21:01 -0700 | [diff] [blame] | 80 | public void testSlidingWindowStats() { |
| 81 | SlidingWindowCounter counter = new SlidingWindowCounter(3); |
| 82 | |
| 83 | // 1 |
| 84 | counter.incrementCount(1); |
| 85 | assertEquals(1, counter.getWindowCount()); |
| 86 | assertEquals(1, counter.getWindowCount(1)); |
| 87 | |
| 88 | // 0, 1 |
| 89 | counter.advanceHead(); |
| 90 | assertEquals(1, counter.getWindowCount()); |
| 91 | assertEquals(0, counter.getWindowCount(1)); |
| 92 | assertEquals(1, counter.getWindowCount(2)); |
| 93 | |
| 94 | // 2, 1 |
| 95 | counter.incrementCount(2); |
| 96 | assertEquals(3, counter.getWindowCount()); |
| 97 | assertEquals(2, counter.getWindowCount(1)); |
| 98 | assertEquals(3, counter.getWindowCount(2)); |
| 99 | |
| 100 | // 0, 2, 1 |
| 101 | counter.advanceHead(); |
| 102 | assertEquals(3, counter.getWindowCount()); |
| 103 | assertEquals(0, counter.getWindowCount(1)); |
| 104 | assertEquals(2, counter.getWindowCount(2)); |
| 105 | assertEquals(3, counter.getWindowCount(3)); |
| 106 | |
| 107 | // 3, 2, 1 |
| 108 | counter.incrementCount(3); |
| 109 | assertEquals(6, counter.getWindowCount()); |
| 110 | assertEquals(3, counter.getWindowCount(1)); |
| 111 | assertEquals(5, counter.getWindowCount(2)); |
| 112 | assertEquals(6, counter.getWindowCount(3)); |
| 113 | |
| 114 | // 0, 3, 2 |
| 115 | counter.advanceHead(); |
| 116 | assertEquals(5, counter.getWindowCount()); |
| 117 | assertEquals(0, counter.getWindowCount(1)); |
| 118 | assertEquals(3, counter.getWindowCount(2)); |
| 119 | assertEquals(5, counter.getWindowCount(3)); |
| 120 | |
| 121 | // 4, 3, 2 |
| 122 | counter.incrementCount(4); |
| 123 | assertEquals(9, counter.getWindowCount()); |
| 124 | assertEquals(4, counter.getWindowCount(1)); |
| 125 | assertEquals(7, counter.getWindowCount(2)); |
| 126 | assertEquals(9, counter.getWindowCount(3)); |
| 127 | |
| 128 | // 0, 4, 3 |
| 129 | counter.advanceHead(); |
| 130 | assertEquals(7, counter.getWindowCount()); |
| 131 | assertEquals(0, counter.getWindowCount(1)); |
| 132 | assertEquals(4, counter.getWindowCount(2)); |
| 133 | assertEquals(7, counter.getWindowCount(3)); |
| 134 | |
| 135 | // 5, 4, 3 |
| 136 | counter.incrementCount(5); |
| 137 | assertEquals(12, counter.getWindowCount()); |
| 138 | assertEquals(5, counter.getWindowCount(1)); |
| 139 | assertEquals(9, counter.getWindowCount(2)); |
| 140 | assertEquals(12, counter.getWindowCount(3)); |
| 141 | |
| 142 | // 0, 5, 4 |
| 143 | counter.advanceHead(); |
| 144 | assertEquals(9, counter.getWindowCount()); |
| 145 | assertEquals(0, counter.getWindowCount(1)); |
| 146 | assertEquals(5, counter.getWindowCount(2)); |
| 147 | assertEquals(9, counter.getWindowCount(3)); |
| 148 | |
| 149 | counter.destroy(); |
| 150 | } |
| 151 | |
| 152 | @Test |
Jordan Halterman | 6de47ff | 2019-03-05 18:44:03 -0800 | [diff] [blame] | 153 | public void testRates() { |
| 154 | assertEquals(0, counter.getWindowRate(), 0.01); |
| 155 | assertEquals(0, counter.getOverallRate(), 0.01); |
| 156 | assertEquals(0, counter.getOverallCount()); |
| 157 | counter.incrementCount(); |
| 158 | assertEquals(1, counter.getWindowRate(), 0.01); |
| 159 | assertEquals(1, counter.getOverallRate(), 0.01); |
| 160 | assertEquals(1, counter.getOverallCount()); |
| 161 | counter.advanceHead(); |
| 162 | counter.incrementCount(); |
| 163 | counter.incrementCount(); |
| 164 | assertEquals(1.5, counter.getWindowRate(), 0.01); |
| 165 | assertEquals(2, counter.getWindowRate(1), 0.01); |
| 166 | assertEquals(1.5, counter.getOverallRate(), 0.01); |
| 167 | assertEquals(3, counter.getOverallCount()); |
| 168 | counter.advanceHead(); |
| 169 | counter.incrementCount(); |
| 170 | counter.incrementCount(); |
| 171 | counter.incrementCount(); |
| 172 | assertEquals(2.5, counter.getWindowRate(), 0.01); |
| 173 | assertEquals(2, counter.getOverallRate(), 0.01); |
| 174 | assertEquals(6, counter.getOverallCount()); |
| 175 | } |
| 176 | |
| 177 | @Test |
Jonathan Hart | 233a18a | 2015-03-02 17:24:58 -0800 | [diff] [blame] | 178 | public void testCornerCases() { |
| 179 | try { |
| 180 | counter.get(3); |
| 181 | fail("Exception should have been thrown"); |
| 182 | } catch (IllegalArgumentException e) { |
| 183 | assertTrue(true); |
| 184 | } |
| 185 | |
| 186 | try { |
| 187 | new SlidingWindowCounter(0); |
| 188 | fail("Exception should have been thrown"); |
| 189 | } catch (IllegalArgumentException e) { |
| 190 | assertTrue(true); |
| 191 | } |
| 192 | |
| 193 | try { |
| 194 | new SlidingWindowCounter(-1); |
| 195 | fail("Exception should have been thrown"); |
| 196 | } catch (IllegalArgumentException e) { |
| 197 | assertTrue(true); |
| 198 | } |
| 199 | } |
| 200 | } |