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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.util.Iterator;
import java.util.Set;
import java.util.TreeSet;
import org.testng.Assert;
import org.testng.annotations.Test;
/**
* @test
* @bug 8137326
* @summary Test to verify the Comparable implementation for the StringBuilder class.
* @run testng Comparison
*/
public class Comparison {
static char SEP = ':';
static String[][] books = {
{"Biography", "Steve Jobs"},
{"Biography", "Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future"},
{"Law", "Law 101: Everything You Need to Know About American Law, Fourth Edition"},
{"Law", "The Tools of Argument: How the Best Lawyers Think, Argue, and Win"},
{"History", "The History Book (Big Ideas Simply Explained)"},
{"History", "A People's History of the United States"},
};
/**
* Verifies the Comparable implementation by comparing with two TreeSet that
* contain either StringBuilder or String.
*/
@Test
public void compareWithString() {
Set<StringBuilder> sbSet = constructSBSet();
Set<String> sSet = constructStringSet();
Iterator<StringBuilder> iSB = sbSet.iterator();
Iterator<String> iS = sSet.iterator();
while (iSB.hasNext()) {
String temp1 = iSB.next().toString();
System.out.println(temp1);
String temp2 = iS.next();
System.out.println(temp2);
Assert.assertTrue(temp1.equals(temp2), "Comparing item by item");
}
}
/**
* Compares between StringBuilders
*/
@Test
public void testCompare() {
StringBuilder sb1 = generateTestBuffer(65, 70, 97, 102);
StringBuilder sb2 = generateTestBuffer(65, 70, 97, 102);
StringBuilder sb3 = generateTestBuffer(65, 71, 97, 103);
System.out.println(sb1.toString());
System.out.println(sb2.toString());
System.out.println(sb3.toString());
Assert.assertTrue(sb1.compareTo(sb2) == 0, "Compare sb1 and sb2");
Assert.assertFalse(sb1.compareTo(sb3) == 0, "Compare sb1 and sb3");
}
/**
* Verifies that the comparison is from index 0 to length() - 1 of the two
* character sequences.
*/
@Test
public void testModifiedSequence() {
StringBuilder sb1 = generateTestBuffer(65, 70, 97, 102);
StringBuilder sb2 = generateTestBuffer(65, 70, 98, 103);
// contain different character sequences
Assert.assertFalse(sb1.compareTo(sb2) == 0, "Compare the sequences before truncation");
// the first 5 characters however are the same
sb1.setLength(5);
sb2.setLength(5);
System.out.println(sb1.toString());
System.out.println(sb2.toString());
Assert.assertTrue(sb1.compareTo(sb2) == 0, "Compare sb1 and sb2");
Assert.assertTrue(sb1.toString().compareTo(sb2.toString()) == 0, "Compare strings of sb1 and sb2");
}
private Set<String> constructStringSet() {
Set<String> sSet = new TreeSet<>();
for (String[] book : books) {
sSet.add(book[0] + SEP + book[1]);
}
return sSet;
}
private Set<StringBuilder> constructSBSet() {
Set<StringBuilder> sbSet = new TreeSet<>();
for (String[] book : books) {
sbSet.add(new StringBuilder(book[0]).append(SEP).append(book[1]));
}
return sbSet;
}
private static StringBuilder generateTestBuffer(int from1, int to1,
int from2, int to2) {
StringBuilder aBuffer = new StringBuilder(50);
for (int i = from1; i < to1; i++) {
aBuffer.append((char)i);
}
for (int i = from2; i < to2; i++) {
aBuffer.append((char)i);
}
return aBuffer;
}
}
|
