1 /* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 package org.apache.harmony.luni.tests.java.lang; 18 19 public class ObjectTest extends junit.framework.TestCase { 20 21 /** 22 * Test objects. 23 */ 24 Object obj1 = new Object(); 25 26 Object obj2 = new Object(); 27 28 /** 29 * Generic state indicator. 30 */ 31 int status = 0; 32 33 int ready = 0; 34 35 /** 36 * @tests java.lang.Object#Object() 37 */ test_Constructor()38 public void test_Constructor() { 39 // Test for method java.lang.Object() 40 assertNotNull("Constructor failed !!!", new Object()); 41 } 42 43 /** 44 * @tests java.lang.Object#equals(java.lang.Object) 45 */ test_equalsLjava_lang_Object()46 public void test_equalsLjava_lang_Object() { 47 // Test for method boolean java.lang.Object.equals(java.lang.Object) 48 assertTrue("Same object should be equal", obj1.equals(obj1)); 49 assertTrue("Different objects should not be equal", !obj1.equals(obj2)); 50 } 51 52 /** 53 * @tests java.lang.Object#getClass() 54 */ test_getClass()55 public void test_getClass() throws Exception { 56 // Test for method java.lang.Class java.lang.Object.getClass() 57 String classNames[] = { "java.lang.Object", "java.lang.Throwable", 58 "java.lang.StringBuffer" }; 59 Class<?> classToTest = null; 60 Object instanceToTest = null; 61 62 status = 0; 63 for (int i = 0; i < classNames.length; ++i) { 64 classToTest = Class.forName(classNames[i]); 65 instanceToTest = classToTest.newInstance(); 66 assertTrue("Instance didn't match creator class.", 67 instanceToTest.getClass() == classToTest); 68 assertTrue("Instance didn't match class with matching name.", 69 instanceToTest.getClass() == Class 70 .forName(classNames[i])); 71 } 72 } 73 74 /** 75 * @tests java.lang.Object#hashCode() 76 */ test_hashCode()77 public void test_hashCode() { 78 // Test for method int java.lang.Object.hashCode() 79 assertTrue("Same object should have same hash.", 80 obj1.hashCode() == obj1.hashCode()); 81 assertTrue("Same object should have same hash.", 82 obj2.hashCode() == obj2.hashCode()); 83 } 84 85 /** 86 * @tests java.lang.Object#notify() 87 */ test_notify()88 public void test_notify() { 89 // Test for method void java.lang.Object.notify() 90 91 // Inner class to run test thread. 92 class TestThread implements Runnable { 93 public void run() { 94 synchronized (obj1) { 95 try { 96 ready += 1; 97 obj1.wait();// Wait for ever. 98 status += 1; 99 } catch (InterruptedException ex) { 100 status = -1000; 101 } 102 } 103 } 104 } 105 ; 106 107 // Start of test code. 108 109 // Warning: 110 // This code relies on each thread getting serviced within 111 // 200 mSec of when it is notified. Although this 112 // seems reasonable, it could lead to false-failures. 113 114 ready = 0; 115 status = 0; 116 final int readyWaitSecs = 3; 117 118 final int threadCount = 20; 119 for (int i = 0; i < threadCount; ++i) { 120 new Thread(new TestThread()).start(); 121 } 122 synchronized (obj1) { 123 try { 124 125 // Wait up to readyWaitSeconds for all threads to be waiting on 126 // monitor 127 for (int i = 0; i < readyWaitSecs; i++) { 128 obj1.wait(1000, 0); 129 if (ready == threadCount) { 130 break; 131 } 132 } 133 134 // Check pre-conditions of testing notifyAll 135 assertTrue("Not all launched threads are waiting. (ready = " 136 + ready + ")", ready == threadCount); 137 assertTrue("Thread woke too early. (status = " + status + ")", 138 status == 0); 139 140 for (int i = 1; i <= threadCount; ++i) { 141 obj1.notify(); 142 obj1.wait(200, 0); 143 assertTrue("Out of sync. (expected " + i + " but got " 144 + status + ")", status == i); 145 } 146 147 } catch (InterruptedException ex) { 148 fail( 149 "Unexpectedly got an InterruptedException. (status = " 150 + status + ")"); 151 } 152 } 153 } 154 155 /** 156 * @tests java.lang.Object#notifyAll() 157 */ test_notifyAll()158 public void test_notifyAll() { 159 // Test for method void java.lang.Object.notifyAll() 160 161 // Inner class to run test thread. 162 class TestThread implements Runnable { 163 public void run() { 164 synchronized (obj1) { 165 try { 166 ready += 1; 167 obj1.wait();// Wait for ever. 168 status += 1; 169 } catch (InterruptedException ex) { 170 status = -1000; 171 } 172 } 173 } 174 } 175 ; 176 177 // Start of test code. 178 179 // Warning: 180 // This code relies on all threads getting serviced within 181 // 5 seconds of when they are notified. Although this 182 // seems reasonable, it could lead to false-failures. 183 184 status = 0; 185 ready = 0; 186 final int readyWaitSecs = 3; 187 final int threadCount = 20; 188 for (int i = 0; i < threadCount; ++i) { 189 new Thread(new TestThread()).start(); 190 } 191 192 synchronized (obj1) { 193 194 try { 195 196 // Wait up to readyWaitSeconds for all threads to be waiting on 197 // monitor 198 for (int i = 0; i < readyWaitSecs; i++) { 199 obj1.wait(1000, 0); 200 if (ready == threadCount) { 201 break; 202 } 203 } 204 205 // Check pre-conditions of testing notifyAll 206 assertTrue("Not all launched threads are waiting. (ready = " 207 + ready + ")", ready == threadCount); 208 assertTrue("At least one thread woke too early. (status = " 209 + status + ")", status == 0); 210 211 obj1.notifyAll(); 212 213 obj1.wait(5000, 0); 214 215 assertTrue( 216 "At least one thread did not get notified. (status = " 217 + status + ")", status == threadCount); 218 219 } catch (InterruptedException ex) { 220 fail( 221 "Unexpectedly got an InterruptedException. (status = " 222 + status + ")"); 223 } 224 225 } 226 } 227 228 /** 229 * @tests java.lang.Object#toString() 230 */ test_toString()231 public void test_toString() { 232 // Test for method java.lang.String java.lang.Object.toString() 233 assertNotNull("Object toString returned null.", obj1.toString()); 234 } 235 236 /** 237 * @tests java.lang.Object#wait() 238 */ test_wait()239 public void test_wait() { 240 // Test for method void java.lang.Object.wait() 241 242 // Inner class to run test thread. 243 class TestThread implements Runnable { 244 public void run() { 245 synchronized (obj1) { 246 try { 247 obj1.wait();// Wait for ever. 248 status = 1; 249 } catch (InterruptedException ex) { 250 status = -1; 251 } 252 } 253 } 254 } 255 ; 256 257 // Start of test code. 258 259 // Warning: 260 // This code relies on threads getting serviced within 261 // 1 second of when they are notified. Although this 262 // seems reasonable, it could lead to false-failures. 263 264 status = 0; 265 new Thread(new TestThread()).start(); 266 synchronized (obj1) { 267 try { 268 obj1.wait(1000, 0); 269 assertTrue("Thread woke too early. (status = " + status + ")", 270 status == 0); 271 obj1.notifyAll(); 272 obj1.wait(1000, 0); 273 assertTrue("Thread did not get notified. (status = " + status 274 + ")", status == 1); 275 } catch (InterruptedException ex) { 276 fail( 277 "Unexpectedly got an InterruptedException. (status = " 278 + status + ")"); 279 } 280 } 281 } 282 283 /** 284 * @tests java.lang.Object#wait(long) 285 */ test_waitJ()286 public void test_waitJ() { 287 // Test for method void java.lang.Object.wait(long) 288 289 // Start of test code. 290 291 final int loopCount = 20; 292 final int allowableError = 100; // millesconds 293 final int delay = 200; // milliseconds 294 synchronized (obj1) { 295 try { 296 int count = 0; 297 long[][] toLong = new long[3][3]; 298 for (int i = 0; i < loopCount; ++i) { 299 long before = System.currentTimeMillis(); 300 obj1.wait(delay, 0); 301 long after = System.currentTimeMillis(); 302 long error = (after - before - delay); 303 if (error < 0) 304 error = -error; 305 if (i > 0 && error > allowableError) { 306 // Allow jit to warm up before testing 307 if (count < toLong.length) { 308 toLong[count][0] = i; 309 toLong[count][1] = before; 310 toLong[count][2] = after; 311 count++; 312 } 313 if (error > (1000 + delay) || count == toLong.length) { 314 StringBuffer sb = new StringBuffer(); 315 for (int j = 0; j < count; j++) { 316 sb 317 .append("wakeup time too inaccurate, iteration "); 318 sb.append(toLong[j][0]); 319 sb.append(", before: "); 320 sb.append(toLong[j][1]); 321 sb.append(" after: "); 322 sb.append(toLong[j][2]); 323 sb.append(" diff: "); 324 sb.append(toLong[j][2] - toLong[j][1]); 325 sb.append("\n"); 326 } 327 fail(sb.toString()); 328 } 329 } 330 } 331 } catch (InterruptedException ex) { 332 fail( 333 "Unexpectedly got an InterruptedException. (status = " 334 + status + ")"); 335 } 336 } 337 } 338 339 /** 340 * @tests java.lang.Object#wait(long, int) 341 */ test_waitJI()342 public void test_waitJI() { 343 // Test for method void java.lang.Object.wait(long, int) 344 345 // Inner class to run test thread. 346 class TestThread implements Runnable { 347 public void run() { 348 synchronized (obj1) { 349 try { 350 obj1.wait(0, 1); // Don't wait very long. 351 status = 1; 352 obj1.wait(0, 0); // Wait for ever. 353 status = 2; 354 } catch (InterruptedException ex) { 355 status = -1; 356 } 357 } 358 } 359 } 360 ; 361 362 // Start of test code. 363 364 // Warning: 365 // This code relies on threads getting serviced within 366 // 1 second of when they are notified. Although this 367 // seems reasonable, it could lead to false-failures. 368 369 status = 0; 370 new Thread(new TestThread()).start(); 371 synchronized (obj1) { 372 try { 373 obj1.wait(1000, 0); 374 assertTrue("Thread did not wake after 1 ms. (status = " 375 + status + ")", status == 1); 376 obj1.notifyAll(); 377 obj1.wait(1000, 0); 378 assertTrue("Thread did not get notified. (status = " + status 379 + ")", status == 2); 380 } catch (InterruptedException ex) { 381 fail( 382 "Unexpectedly got an InterruptedException. (status = " 383 + status + ")"); 384 } 385 } 386 387 } 388 } 389