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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
|
/*
* Copyright (c) 2003, 2004, 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.
*/
/* @test
* @bug 4812591 4705328 5019111
* @summary Test append and insert methods with CharSequence params
* @key randomness
*/
import java.util.Random;
public class AppendCharSequence {
private static Random generator = new Random();
public static void main(String[] args) throws Exception {
bash();
checkNulls();
checkOffsets();
checkConstructor();
}
// Sanity test of contents
private static void bash() throws Exception {
for (int i=0; i<1000; i++) {
StringBuffer sb1 = generateTestBuffer(0, 100);
StringBuffer sb2 = generateTestBuffer(0, 100);
StringBuffer sb3 = generateTestBuffer(0, 100);
StringBuffer sb4 = generateTestBuffer(0, 100);
StringBuffer sb5 = new StringBuffer();
String s1 = sb1.toString();
String s2 = sb2.toString();
String s3 = sb3.toString();
String s4 = sb4.toString();
String s5 = null;
// append(CharSequence cs)
sb5.append((CharSequence)sb1);
s5 = sb1.toString();
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.append failure 1");
// append (CharSequence cs, int start, int end)
int index = generator.nextInt(100);
int len = generator.nextInt(100);
while (index > sb2.length() - len) {
index = generator.nextInt(100);
len = generator.nextInt(100);
}
sb5.append((CharSequence)sb2, index, index + len);
s5 = s5 + sb2.toString().substring(index, index + len);
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.append failure 2");
// insert(int dstOffset, CharSequence cs)
index = generator.nextInt(100);
while (index > s5.length()) {
index = generator.nextInt(100);
}
sb5.insert(index, (CharSequence)sb3);
s5 = new StringBuffer(s5).insert(index, sb3).toString();
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.insert failure 1");
// insert(int dstOffset, CharSequence s, int start, int end)
int index1 = generator.nextInt(100);
while (index1 > s5.length()) {
index1 = generator.nextInt(100);
}
int index2 = generator.nextInt(100);
len = generator.nextInt(100);
while (index2 > sb4.length() - len) {
index2 = generator.nextInt(100);
len = generator.nextInt(100);
}
sb5.insert(index1, (CharSequence)sb4, index2, index2 + len);
s5 = new StringBuffer(s5).insert(index1, s4.toCharArray(),
index2, len).toString();
if (!sb5.toString().equals(s5))
throw new RuntimeException("StringBuffer.insert failure 2");
}
}
private static int getRandomIndex(int constraint1, int constraint2) {
int range = constraint2 - constraint1;
int x = generator.nextInt(range);
return constraint1 + x;
}
private static StringBuffer generateTestBuffer(int min, int max) {
StringBuffer aNewStringBuffer = new StringBuffer();
int aNewLength = getRandomIndex(min, max);
for(int y=0; y<aNewLength; y++) {
int achar = generator.nextInt(30)+30;
char test = (char)(achar);
aNewStringBuffer.append(test);
}
return aNewStringBuffer;
}
// Check handling of null as "null"
private static void checkNulls() throws Exception {
StringBuffer sb1 = new StringBuffer();
CharSequence cs = null;
sb1.append("test");
sb1.append(cs);
if (!sb1.toString().equals("testnull"))
throw new RuntimeException("StringBuffer.append failure 3");
sb1 = new StringBuffer();
sb1.append("test", 0, 2);
sb1.append(cs, 0, 2);
if (!sb1.toString().equals("tenu"))
throw new RuntimeException("StringBuffer.append failure 4");
sb1 = new StringBuffer("test");
sb1.insert(2, cs);
if (!sb1.toString().equals("tenullst"))
throw new RuntimeException("StringBuffer.insert failure 3");
sb1 = new StringBuffer("test");
sb1.insert(2, cs, 0, 2);
if (!sb1.toString().equals("tenust"))
throw new RuntimeException("StringBuffer.insert failure 4");
}
// Test the bounds checking
private static void checkOffsets() throws Exception {
// append (CharSeqeunce cs, int start, int end)
for (int i=0; i<100; i++) {
StringBuffer sb = generateTestBuffer(0, 80);
CharSequence cs = (CharSequence)generateTestBuffer(0, 80);
int index = 0;
int len = 0;
while (index <= cs.length() - len) {
index = generator.nextInt(100) - 50;
len = generator.nextInt(100) - 50;
if (index < 0)
break;
if (len < 0)
break;
}
try {
sb.append(cs, index, index + len);
throw new RuntimeException("Append bounds checking failure");
} catch (IndexOutOfBoundsException e) {
// Correct result
}
}
// insert(int dstOffset, CharSequence cs)
for (int i=0; i<100; i++) {
StringBuffer sb = new StringBuffer("test1");
CharSequence cs = (CharSequence)new StringBuffer("test2");
int index = 0;
while (index <= sb.length()) {
index = generator.nextInt(100) - 50;
if (index < 0)
break;
}
try {
sb.insert(index, cs);
throw new RuntimeException("Insert bounds checking failure");
} catch (IndexOutOfBoundsException e) {
// Correct result
}
}
// insert(int dstOffset, CharSequence s, int start, int end)
for (int i=0; i<100; i++) {
StringBuffer sb = new StringBuffer("test1");
CharSequence cs = (CharSequence)new StringBuffer("test2");
int index1 = 0;
while (index1 <= sb.length()) {
index1 = generator.nextInt(100) - 50;
if (index1 < 0)
break;
}
int index2 = 0;
int len = 0;
while (index2 < sb.length() - len) {
index2 = generator.nextInt(100) - 50;
len = generator.nextInt(100) - 50;
if (index2 < 0)
break;
if (len < 0)
break;
}
try {
sb.insert(index1, cs, index2, index2 + len);
throw new RuntimeException("Insert bounds checking failure");
} catch (IndexOutOfBoundsException e) {
// Correct result
}
}
}
// Test the CharSequence constructor
private static void checkConstructor() throws Exception {
for (int i=0; i<100; i++) {
StringBuffer sb = generateTestBuffer(0, 100);
CharSequence cs = (CharSequence)sb;
StringBuffer sb2 = new StringBuffer(cs);
if (!sb.toString().equals(sb2.toString())) {
throw new RuntimeException("CharSequence constructor failure");
}
}
}
}
|
