1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/*
* SonarQube
* Copyright (C) 2009-2025 SonarSource SA
* mailto:info AT sonarsource DOT com
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
package org.sonar.duplications.utils;
import org.junit.Test;
import static org.assertj.core.api.Assertions.assertThat;
public class FastStringComparatorTest {
static int compare(String left, String right) {
return FastStringComparator.INSTANCE.compare(left, right);
}
@Test
public void sameHashCode() {
// Next two Strings have same hash code in Java - see http://www.drmaciver.com/2008/07/javalangstringhashcode/
String s1 = "Od";
String s2 = "PE";
assertThat(s1).hasSameHashCodeAs(s2);
assertThat(compare(s1, s2)).isNegative();
assertThat(compare(s2, s1)).isPositive();
}
@Test
public void differentHashCode() {
String s1 = "a";
String s2 = "c";
assertThat(s1.hashCode()).isNotEqualTo(s2.hashCode());
assertThat(compare(s1, s2)).isEqualTo(-1);
assertThat(compare(s2, s1)).isOne();
}
@Test
public void sameObject() {
String s1 = "a";
String s2 = s1;
assertThat(s1).isSameAs(s2);
assertThat(compare(s1, s2)).isZero();
assertThat(compare(s1, s2)).isZero();
}
@Test
public void sameString() {
String s1 = new String("a");
String s2 = new String("a");
assertThat(s1).isNotSameAs(s2);
assertThat(compare(s1, s2)).isZero();
assertThat(compare(s1, s2)).isZero();
}
}
|
