1 /* 2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* @test 25 * @bug 4812591 4705328 5019111 8218228 26 * @summary Test append and insert methods with CharSequence params 27 * @key randomness 28 */ 29 30 import java.util.Random; 31 32 public class AppendCharSequence { 33 private static Random generator = new Random(); 34 35 public static void main(String[] args) throws Exception { 36 bash(); 37 checkNulls(); 38 checkOffsets(); 39 checkConstructor(); 40 } 41 42 // Sanity test of contents 43 private static void bash() throws Exception { 44 for (int i=0; i<1000; i++) { 45 StringBuffer sb1 = generateTestBuffer(0, 100); 46 StringBuffer sb2 = generateTestBuffer(0, 100); 47 StringBuffer sb3 = generateTestBuffer(0, 100); 48 StringBuffer sb4 = generateTestBuffer(0, 100); 49 StringBuffer sb5 = new StringBuffer(); 50 51 String s1 = sb1.toString(); 52 String s2 = sb2.toString(); 53 String s3 = sb3.toString(); 54 String s4 = sb4.toString(); 55 String s5 = null; 56 57 // append(CharSequence cs) 58 sb5.append((CharSequence)sb1); 59 s5 = sb1.toString(); 60 61 if (!sb5.toString().equals(s5)) 62 throw new RuntimeException("StringBuffer.append failure 1"); 63 64 // append (CharSequence cs, int start, int end) 65 int index = generator.nextInt(100); 66 int len = generator.nextInt(100); 67 while (index > sb2.length() - len) { 68 index = generator.nextInt(100); 69 len = generator.nextInt(100); 70 } 71 sb5.append((CharSequence)sb2, index, index + len); 72 s5 = s5 + sb2.toString().substring(index, index + len); 73 74 if (!sb5.toString().equals(s5)) 75 throw new RuntimeException("StringBuffer.append failure 2"); 76 77 // insert(int dstOffset, CharSequence cs) 78 index = generator.nextInt(100); 79 while (index > s5.length()) { 80 index = generator.nextInt(100); 81 } 82 sb5.insert(index, (CharSequence)sb3); 83 s5 = new StringBuffer(s5).insert(index, sb3).toString(); 84 85 if (!sb5.toString().equals(s5)) 86 throw new RuntimeException("StringBuffer.insert failure 1"); 87 88 // insert(int dstOffset, CharSequence s, int start, int end) 89 int index1 = generator.nextInt(100); 90 while (index1 > s5.length()) { 91 index1 = generator.nextInt(100); 92 } 93 int index2 = generator.nextInt(100); 94 len = generator.nextInt(100); 95 while (index2 > sb4.length() - len) { 96 index2 = generator.nextInt(100); 97 len = generator.nextInt(100); 98 } 99 sb5.insert(index1, (CharSequence)sb4, index2, index2 + len); 100 s5 = new StringBuffer(s5).insert(index1, s4.toCharArray(), 101 index2, len).toString(); 102 103 if (!sb5.toString().equals(s5)) 104 throw new RuntimeException("StringBuffer.insert failure 2"); 105 } 106 } 107 108 private static int getRandomIndex(int constraint1, int constraint2) { 109 int range = constraint2 - constraint1; 110 int x = generator.nextInt(range); 111 return constraint1 + x; 112 } 113 114 private static StringBuffer generateTestBuffer(int min, int max) { 115 StringBuffer aNewStringBuffer = new StringBuffer(); 116 int aNewLength = getRandomIndex(min, max); 117 for(int y=0; y<aNewLength; y++) { 118 int achar = generator.nextInt(30)+30; 119 char test = (char)(achar); 120 aNewStringBuffer.append(test); 121 } 122 return aNewStringBuffer; 123 } 124 125 // Check handling of null as "null" 126 private static void checkNulls() throws Exception { 127 StringBuffer sb1 = new StringBuffer(); 128 CharSequence cs = null; 129 sb1.append("test"); 130 sb1.append(cs); 131 if (!sb1.toString().equals("testnull")) 132 throw new RuntimeException("StringBuffer.append failure 3"); 133 134 sb1 = new StringBuffer(); 135 sb1.append("test", 0, 2); 136 sb1.append(cs, 0, 2); 137 if (!sb1.toString().equals("tenu")) 138 throw new RuntimeException("StringBuffer.append failure 4"); 139 140 sb1 = new StringBuffer("test"); 141 sb1.insert(2, cs); 142 if (!sb1.toString().equals("tenullst")) 143 throw new RuntimeException("StringBuffer.insert failure 3"); 144 145 sb1 = new StringBuffer("test"); 146 sb1.insert(2, cs, 0, 2); 147 if (!sb1.toString().equals("tenust")) 148 throw new RuntimeException("StringBuffer.insert failure 4"); 149 } 150 151 // Test the bounds checking 152 private static void checkOffsets() throws Exception { 153 154 // append (CharSeqeunce cs, int start, int end) 155 for (int i=0; i<100; i++) { 156 StringBuffer sb = generateTestBuffer(0, 80); 157 CharSequence cs = (CharSequence)generateTestBuffer(0, 80); 158 int index = 0; 159 int len = 0; 160 while (index <= cs.length() - len) { 161 index = generator.nextInt(100) - 50; 162 len = generator.nextInt(100) - 50; 163 if (index < 0) 164 break; 165 if (len < 0) 166 break; 167 } 168 try { 169 sb.append(cs, index, index + len); 170 throw new RuntimeException("Append bounds checking failure"); 171 } catch (IndexOutOfBoundsException e) { 172 // Correct result 173 } 174 } 175 176 // insert(int dstOffset, CharSequence cs) 177 for (int i=0; i<100; i++) { 178 StringBuffer sb = new StringBuffer("test1"); 179 CharSequence cs = (CharSequence)new StringBuffer("test2"); 180 int index = 0; 181 while (index <= sb.length()) { 182 index = generator.nextInt(100) - 50; 183 if (index < 0) 184 break; 185 } 186 try { 187 sb.insert(index, cs); 188 throw new RuntimeException("Insert bounds checking failure"); 189 } catch (IndexOutOfBoundsException e) { 190 // Correct result 191 } 192 } 193 194 // insert(int dstOffset, CharSequence s, int start, int end) 195 for (int i=0; i<100; i++) { 196 StringBuffer sb = new StringBuffer("test1"); 197 CharSequence cs = (CharSequence)new StringBuffer("test2"); 198 int index1 = 0; 199 while (index1 <= sb.length()) { 200 index1 = generator.nextInt(100) - 50; 201 if (index1 < 0) 202 break; 203 } 204 int index2 = 0; 205 int len = 0; 206 while (index2 < sb.length() - len) { 207 index2 = generator.nextInt(100) - 50; 208 len = generator.nextInt(100) - 50; 209 if (index2 < 0) 210 break; 211 if (len < 0) 212 break; 213 } 214 try { 215 sb.insert(index1, cs, index2, index2 + len); 216 throw new RuntimeException("Insert bounds checking failure"); 217 } catch (IndexOutOfBoundsException e) { 218 // Correct result 219 } 220 } 221 } 222 223 // Test the CharSequence constructor 224 private static void checkConstructor() throws Exception { 225 for (int i=0; i<100; i++) { 226 StringBuffer sb = generateTestBuffer(0, 100); 227 CharSequence cs = (CharSequence)sb; 228 StringBuffer sb2 = new StringBuffer(cs); 229 if (!sb.toString().equals(sb2.toString())) { 230 throw new RuntimeException("CharSequence constructor failure"); 231 } 232 } 233 checkNegativeLenCharSeq(-1); 234 checkNegativeLenCharSeq(-16); 235 checkNegativeLenCharSeq(-17); 236 checkNegativeLenCharSeq(Integer.MIN_VALUE); 237 } 238 239 // Test constructing from CharSequence of negative length 240 private static void checkNegativeLenCharSeq(int len) { 241 try { 242 CharSequence seq = new MyNegativeLenCharSeq(len); 243 StringBuffer sb = new StringBuffer(seq); 244 } catch (NegativeArraySizeException expected) { 245 } catch (Throwable exc) { 246 throw new RuntimeException("Unexpected: " + exc, exc); 247 } 248 } 249 250 private static class MyNegativeLenCharSeq implements CharSequence { 251 int length; 252 MyNegativeLenCharSeq(int length) { 253 this.length = length; 254 } 255 public char charAt(int i) { 256 throw new UnsupportedOperationException(); 257 } 258 public int length() { return length; } 259 public CharSequence subSequence(int st, int e) { 260 throw new UnsupportedOperationException(); 261 } 262 public String toString() { return ""; } 263 } 264 }