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17 package org.apache.commons.math4.legacy.genetics;
18
19 import java.util.Iterator;
20 import java.util.concurrent.TimeUnit;
21
22 import org.apache.commons.math4.core.jdkmath.JdkMath;
23 import org.junit.Assert;
24 import org.junit.Test;
25
26 public class FixedElapsedTimeTest {
27
28 @Test
29 public void testIsSatisfied() {
30 final Population pop = new Population() {
31 @Override
32 public void addChromosome(final Chromosome chromosome) {
33
34 }
35 @Override
36 public Chromosome getFittestChromosome() {
37
38 return null;
39 }
40 @Override
41 public int getPopulationLimit() {
42
43 return 0;
44 }
45 @Override
46 public int getPopulationSize() {
47
48 return 0;
49 }
50 @Override
51 public Population nextGeneration() {
52
53 return null;
54 }
55 @Override
56 public Iterator<Chromosome> iterator() {
57
58 return null;
59 }
60 };
61
62 final long start = System.nanoTime();
63 final long duration = 3;
64 final FixedElapsedTime tec = new FixedElapsedTime(duration, TimeUnit.SECONDS);
65
66 while (!tec.isSatisfied(pop)) {
67 try {
68 Thread.sleep(50);
69 } catch (InterruptedException e) {
70
71 }
72 }
73
74 final long end = System.nanoTime();
75 final long elapsedTime = end - start;
76 final long diff = JdkMath.abs(elapsedTime - TimeUnit.SECONDS.toNanos(duration));
77
78 Assert.assertTrue(diff < TimeUnit.MILLISECONDS.toNanos(100));
79 }
80 }