1 /*
   2  * Copyright (c) 2013, 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 import java.security.CodeSource;
  25 import java.security.Permission;
  26 import java.security.PermissionCollection;
  27 import java.security.Permissions;
  28 import java.security.Policy;
  29 import java.security.ProtectionDomain;
  30 import java.util.EnumSet;
  31 import java.util.HashMap;
  32 import java.util.Map;
  33 import java.util.logging.LogManager;
  34 import java.util.logging.Logger;
  35 import java.util.logging.LoggingPermission;
  36 import sun.misc.JavaAWTAccess;
  37 import sun.misc.SharedSecrets;
  38 
  39 /*
  40  * @test
  41  * @bug 8017174 8010727 8019945
  42  * @summary  NPE when using Logger.getAnonymousLogger or
  43  *           LogManager.getLogManager().getLogger
  44  *
  45  * @run main/othervm -Dtest.security=off TestAppletLoggerContext LoadingApplet
  46  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  LoadingApplet
  47  * @run main/othervm -Dtest.security=off TestAppletLoggerContext LoadingMain
  48  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  LoadingMain
  49  * @run main/othervm -Dtest.security=off TestAppletLoggerContext One
  50  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  One
  51  * @run main/othervm -Dtest.security=off TestAppletLoggerContext Two
  52  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  Two
  53  * @run main/othervm -Dtest.security=off TestAppletLoggerContext Three
  54  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  Three
  55  * @run main/othervm -Dtest.security=off TestAppletLoggerContext Four
  56  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  Four
  57  * @run main/othervm -Dtest.security=off TestAppletLoggerContext Five
  58  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  Five
  59  * @run main/othervm -Dtest.security=off TestAppletLoggerContext Six
  60  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  Six
  61  * @run main/othervm -Dtest.security=off TestAppletLoggerContext Seven
  62  * @run main/othervm -Dtest.security=on TestAppletLoggerContext  Seven
  63  * @run main/othervm -Dtest.security=off TestAppletLoggerContext
  64  * @run main/othervm -Dtest.security=on TestAppletLoggerContext
  65  */
  66 
  67 // NOTE: We run in other VM in order to 1. switch security manager and 2. cause
  68 // LogManager class to be loaded anew.
  69 public class TestAppletLoggerContext {
  70 
  71     // Avoids the hassle of dealing with files and system props...
  72     static class SimplePolicy extends Policy {
  73         private final Permissions perms;
  74         public SimplePolicy(Permission... permissions) {
  75             perms = new Permissions();
  76             for (Permission permission : permissions) {
  77                 perms.add(permission);
  78             }
  79         }
  80         @Override
  81         public PermissionCollection getPermissions(CodeSource cs) {
  82             return perms;
  83         }
  84         @Override
  85         public PermissionCollection getPermissions(ProtectionDomain pd) {
  86             return perms;
  87         }
  88         @Override
  89         public boolean implies(ProtectionDomain pd, Permission p) {
  90            return perms.implies(p);
  91         }
  92     }
  93 
  94     // The bridge class initializes the logging system.
  95     // It stubs the applet context in order to simulate context changes.
  96     //
  97     public static class Bridge {
  98 
  99         private static class JavaAWTAccessStub implements JavaAWTAccess {
 100             boolean active = true;
 101 
 102             private static class TestExc {
 103                 private final Map<Object, Object> map = new HashMap<>();
 104                 void put(Object key, Object v) { map.put(key, v); }
 105                 Object get(Object key) { return map.get(key); }
 106                 void remove(Object o) { map.remove(o); }
 107                 public static TestExc exc(Object o) {
 108                     return TestExc.class.cast(o);
 109                 }
 110             }
 111 
 112             TestExc exc;
 113 
 114             @Override
 115             public Object getAppletContext() { return active ? exc : null; }
 116         }
 117 
 118         final static JavaAWTAccessStub javaAwtAccess = new JavaAWTAccessStub();
 119         public static void init() {
 120             SharedSecrets.setJavaAWTAccess(javaAwtAccess);
 121             if (System.getProperty("test.security", "on").equals("on")) {
 122                 Policy p = new SimplePolicy(new LoggingPermission("control", null),
 123                     new RuntimePermission("setContextClassLoader"),
 124                     new RuntimePermission("shutdownHooks"));
 125                 Policy.setPolicy(p);
 126                 System.setSecurityManager(new SecurityManager());
 127             }
 128         }
 129 
 130         public static void changeContext() {
 131             System.out.println("... Switching to a new applet context ...");
 132             javaAwtAccess.active = true;
 133             javaAwtAccess.exc = new JavaAWTAccessStub.TestExc();
 134         }
 135 
 136         public static void desactivate() {
 137             System.out.println("... Running with no applet context ...");
 138             javaAwtAccess.exc = null;
 139             javaAwtAccess.active = false;
 140         }
 141 
 142         public static class CustomAnonymousLogger extends Logger {
 143             public CustomAnonymousLogger() {
 144                 this("");
 145             }
 146             public CustomAnonymousLogger(String name) {
 147                 super(null, null);
 148                 System.out.println( " LogManager: " +LogManager.getLogManager());
 149                 System.out.println( " getLogger: " +LogManager.getLogManager().getLogger(name));
 150                 setParent(LogManager.getLogManager().getLogger(name));
 151             }
 152         }
 153 
 154         public static class CustomLogger extends Logger {
 155             CustomLogger(String name) {
 156                 super(name, null);
 157             }
 158         }
 159     }
 160 
 161     public static enum TestCase {
 162         LoadingApplet, LoadingMain, One, Two, Three, Four, Five, Six, Seven;
 163         public void test() {
 164             switch(this) {
 165                 // When run - each of these two tests must be
 166                 // run before any other tests and before each other.
 167                 case LoadingApplet: testLoadingApplet(); break;
 168                 case LoadingMain:   testLoadingMain(); break;
 169                 case One:   testOne(); break;
 170                 case Two:   testTwo(); break;
 171                 case Three: testThree(); break;
 172                 case Four:  testFour(); break;
 173                 case Five:  testFive(); break;
 174                 case Six:   testSix(); break;
 175                 case Seven: testSeven(); break;
 176             }
 177         }
 178         public String describe() {
 179             switch(this) {
 180                 case LoadingApplet:
 181                     return "Test that when the LogManager class is"
 182                         + " loaded in  an applet thread first,"
 183                         + "\n all LoggerContexts are correctly initialized";
 184                 case LoadingMain:
 185                     return "Test that when the LogManager class is"
 186                         + " loaded in  the main thread first,"
 187                         + "\n all LoggerContexts are correctly initialized";
 188                 case One:
 189                     return "Test that Logger.getAnonymousLogger()"
 190                         + " and new CustomAnonymousLogger() don't throw NPE";
 191                 case Two:
 192                     return "Test that Logger.getLogger(\"\")"
 193                             + " does not return null nor throws NPE";
 194                 case Three:
 195                     return "Test that LogManager.getLogManager().getLogger(\"\")"
 196                             + " does not return null nor throws NPE";
 197                 case Four:
 198                     return "Test that Logger.getLogger(Logger.GLOBAL_LOGGER_NAME)"
 199                             + " does not return null,\n and that"
 200                             + " new CustomAnonymousLogger(Logger.GLOBAL_LOGGER_NAME)"
 201                             + " does not throw NPE";
 202                 case Five:
 203                     return "Test that LogManager.getLogManager().getLogger(Logger.GLOBAL_LOGGER_NAME)"
 204                             + "\n does not return null nor throws NPE";
 205                 case Six:
 206                     return "Test that manager.getLogger(Logger.GLOBAL_LOGGER_NAME)"
 207                             + " returns null\n when manager is not the default"
 208                             + " LogManager instance.\n"
 209                             + "Test adding a new logger named \"global\" in that"
 210                             + " non default instance.";
 211                 case Seven: return "Test that manager.getLogger(\"\")"
 212                             + " returns null\n when manager is not the default"
 213                             + " LogManager instance.\n"
 214                             + "Test adding a new logger named \"\" in that"
 215                             + " non default instance.";
 216                 default: return "Undefined";
 217             }
 218         }
 219     };
 220 
 221     /**
 222      * @param args the command line arguments
 223      */
 224     public static void main(String[] args) {
 225         Bridge.init();
 226         EnumSet<TestCase> tests = EnumSet.noneOf(TestCase.class);
 227         for (String arg : args) {
 228             tests.add(TestCase.valueOf(arg));
 229         }
 230         if (args.length == 0) {
 231             tests = EnumSet.complementOf(EnumSet.of(TestCase.LoadingMain));
 232         }
 233         final EnumSet<TestCase> loadingTests =
 234             EnumSet.of(TestCase.LoadingApplet, TestCase.LoadingMain);
 235         int testrun = 0;
 236         for (TestCase test : tests) {
 237             if (loadingTests.contains(test)) {
 238                 if (testrun > 0) {
 239                     throw new UnsupportedOperationException("Test case "
 240                           + test + " must be executed first!");
 241                 }
 242             }
 243             System.out.println("Testing "+ test+": ");
 244             System.out.println(test.describe());
 245             try {
 246                 test.test();
 247             } catch (Exception x) {
 248                throw new Error(String.valueOf(test)
 249                    + (System.getSecurityManager() == null ? " without " : " with ")
 250                    + "security failed: "+x+"\n "+"FAILED: "+test.describe()+"\n", x);
 251             } finally {
 252                 testrun++;
 253             }
 254             Bridge.changeContext();
 255             System.out.println("PASSED: "+ test);
 256         }
 257     }
 258 
 259     public static void testLoadingApplet() {
 260         Bridge.changeContext();
 261 
 262         Logger bar = new Bridge.CustomLogger("com.foo.Bar");
 263         LogManager.getLogManager().addLogger(bar);
 264         assertNotNull(bar.getParent());
 265         testParent(bar);
 266         testParent(LogManager.getLogManager().getLogger("global"));
 267         testParent(LogManager.getLogManager().getLogger(bar.getName()));
 268 
 269         Bridge.desactivate();
 270 
 271         Logger foo = new Bridge.CustomLogger("com.foo.Foo");
 272         boolean b = LogManager.getLogManager().addLogger(foo);
 273         assertEquals(Boolean.TRUE, Boolean.valueOf(b));
 274         assertNotNull(foo.getParent());
 275         testParent(foo);
 276         testParent(LogManager.getLogManager().getLogger("global"));
 277         testParent(LogManager.getLogManager().getLogger(foo.getName()));
 278     }
 279 
 280     public static void testLoadingMain() {
 281         Bridge.desactivate();
 282 
 283         Logger bar = new Bridge.CustomLogger("com.foo.Bar");
 284         LogManager.getLogManager().addLogger(bar);
 285         assertNotNull(bar.getParent());
 286         testParent(bar);
 287         testParent(LogManager.getLogManager().getLogger("global"));
 288         testParent(LogManager.getLogManager().getLogger(bar.getName()));
 289 
 290         Bridge.changeContext();
 291 
 292         Logger foo = new Bridge.CustomLogger("com.foo.Foo");
 293         boolean b = LogManager.getLogManager().addLogger(foo);
 294         assertEquals(Boolean.TRUE, Boolean.valueOf(b));
 295         assertNotNull(foo.getParent());
 296         testParent(foo);
 297         testParent(LogManager.getLogManager().getLogger("global"));
 298         testParent(LogManager.getLogManager().getLogger(foo.getName()));
 299 
 300     }
 301 
 302     public static void testOne() {
 303         for (int i=0; i<3 ; i++) {
 304             Logger logger1 = Logger.getAnonymousLogger();
 305             Logger logger1b = Logger.getAnonymousLogger();
 306             Bridge.changeContext();
 307             Logger logger2 = Logger.getAnonymousLogger();
 308             Logger logger2b = Logger.getAnonymousLogger();
 309             Bridge.changeContext();
 310             Logger logger3 = new Bridge.CustomAnonymousLogger();
 311             Logger logger3b = new Bridge.CustomAnonymousLogger();
 312             Bridge.changeContext();
 313             Logger logger4 = new Bridge.CustomAnonymousLogger();
 314             Logger logger4b = new Bridge.CustomAnonymousLogger();
 315         }
 316     }
 317 
 318 
 319     public static void testTwo() {
 320         for (int i=0; i<3 ; i++) {
 321             Logger logger1 = Logger.getLogger("");
 322             Logger logger1b = Logger.getLogger("");
 323             assertNotNull(logger1);
 324             assertNotNull(logger1b);
 325             assertEquals(logger1, logger1b);
 326             Bridge.changeContext();
 327             Logger logger2 = Logger.getLogger("");
 328             Logger logger2b = Logger.getLogger("");
 329             assertNotNull(logger2);
 330             assertNotNull(logger2b);
 331             assertEquals(logger2, logger2b);
 332             assertEquals(logger1, logger2);
 333         }
 334     }
 335 
 336     public static void testThree() {
 337         for (int i=0; i<3 ; i++) {
 338             Logger logger1 = LogManager.getLogManager().getLogger("");
 339             Logger logger1b = LogManager.getLogManager().getLogger("");
 340             assertNotNull(logger1);
 341             assertNotNull(logger1b);
 342             assertEquals(logger1, logger1b);
 343             Bridge.changeContext();
 344             Logger logger2 = LogManager.getLogManager().getLogger("");
 345             Logger logger2b = LogManager.getLogManager().getLogger("");
 346             assertNotNull(logger2);
 347             assertNotNull(logger2b);
 348             assertEquals(logger2, logger2b);
 349             assertEquals(logger1, logger2);
 350         }
 351     }
 352 
 353     public static void testFour() {
 354         for (int i=0; i<3 ; i++) {
 355             Logger logger1 = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME);
 356             Logger logger1b = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME);
 357             assertNotNull(logger1);
 358             assertNotNull(logger1b);
 359             assertEquals(logger1, logger1b);
 360             Bridge.changeContext();
 361 
 362             Logger logger2 = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME);
 363             Logger logger2b = Logger.getLogger(Logger.GLOBAL_LOGGER_NAME);
 364             assertNotNull(logger2);
 365             assertNotNull(logger2b);
 366             assertEquals(logger2, logger2b);
 367 
 368             assertEquals(logger1, logger2);
 369 
 370             Bridge.changeContext();
 371             Logger logger3 = new Bridge.CustomAnonymousLogger(Logger.GLOBAL_LOGGER_NAME);
 372             Logger logger3b = new Bridge.CustomAnonymousLogger(Logger.GLOBAL_LOGGER_NAME);
 373             Bridge.changeContext();
 374             Logger logger4 = new Bridge.CustomAnonymousLogger(Logger.GLOBAL_LOGGER_NAME);
 375             Logger logger4b = new Bridge.CustomAnonymousLogger(Logger.GLOBAL_LOGGER_NAME);
 376         }
 377     }
 378 
 379     public static void testFive() {
 380         for (int i=0; i<3 ; i++) {
 381             Logger logger1 = LogManager.getLogManager().getLogger(Logger.GLOBAL_LOGGER_NAME);
 382             Logger logger1b = LogManager.getLogManager().getLogger(Logger.GLOBAL_LOGGER_NAME);
 383             assertNotNull(logger1);
 384             assertNotNull(logger1b);
 385             assertEquals(logger1, logger1b);
 386 
 387             Bridge.changeContext();
 388 
 389             Logger logger2 = LogManager.getLogManager().getLogger(Logger.GLOBAL_LOGGER_NAME);
 390             Logger logger2b = LogManager.getLogManager().getLogger(Logger.GLOBAL_LOGGER_NAME);
 391             assertNotNull(logger2);
 392             assertNotNull(logger2b);
 393             assertEquals(logger2, logger2b);
 394 
 395             assertEquals(logger1, logger2);
 396         }
 397     }
 398 
 399     /**
 400      * This test is designed to test the behavior of additional LogManager instances.
 401      * It must be noted that if the security manager is off, then calling
 402      * Bridge.changeContext() has actually no effect - which explains why we have
 403      * some differences between the cases security manager on & security manager
 404      * off.
 405      **/
 406     public static void testSix() {
 407         for (int i=0; i<3 ; i++) {
 408             Bridge.desactivate();
 409             LogManager manager = new LogManager() {};
 410             Logger logger1 = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 411             Logger logger1b = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 412             assertNull(logger1);
 413             assertNull(logger1b);
 414             Logger global = new Bridge.CustomLogger(Logger.GLOBAL_LOGGER_NAME);
 415             manager.addLogger(global);
 416             Logger logger2 = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 417             Logger logger2b = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 418             assertNotNull(logger2);
 419             assertNotNull(logger2b);
 420             assertEquals(logger2, global);
 421             assertEquals(logger2b, global);
 422             assertNull(manager.getLogger(""));
 423             assertNull(manager.getLogger(""));
 424 
 425             for (int j = 0; j<3; j++) {
 426                 Bridge.changeContext();
 427 
 428                 // this is not a supported configuration:
 429                 // We are in an applet context with several log managers.
 430                 // We however need to check our assumptions...
 431 
 432                 // Applet context => root logger and global logger should also be null.
 433 
 434                 Logger expected = (System.getSecurityManager() == null ? global : null);
 435                 Logger logger3 = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 436                 Logger logger3b = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 437                 assertEquals(expected, logger3);
 438                 assertEquals(expected, logger3b);
 439                 Logger global2 = new Bridge.CustomLogger(Logger.GLOBAL_LOGGER_NAME);
 440                 manager.addLogger(global2);
 441                 Logger logger4 = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 442                 Logger logger4b = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 443                 assertNotNull(logger4);
 444                 assertNotNull(logger4b);
 445                 expected = (System.getSecurityManager() == null ? global : global2);;
 446                 assertEquals(logger4,  expected);
 447                 assertEquals(logger4b, expected);
 448 
 449                 Logger logger5 = manager.getLogger("");
 450                 Logger logger5b = manager.getLogger("");
 451                 Logger expectedRoot = null;
 452                 assertEquals(logger5, expectedRoot);
 453                 assertEquals(logger5b, expectedRoot);
 454             }
 455 
 456         }
 457     }
 458 
 459     /**
 460      * This test is designed to test the behavior of additional LogManager instances.
 461      * It must be noted that if the security manager is off, then calling
 462      * Bridge.changeContext() has actually no effect - which explains why we have
 463      * some differences between the cases security manager on & security manager
 464      * off.
 465      **/
 466     public static void testSeven() {
 467         for (int i=0; i<3 ; i++) {
 468             Bridge.desactivate();
 469             LogManager manager = new LogManager() {};
 470             Logger logger1 = manager.getLogger("");
 471             Logger logger1b = manager.getLogger("");
 472             assertNull(logger1);
 473             assertNull(logger1b);
 474             Logger global = new Bridge.CustomLogger(Logger.GLOBAL_LOGGER_NAME);
 475             manager.addLogger(global);
 476             Logger logger2 = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 477             Logger logger2b = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 478             assertNotNull(logger2);
 479             assertNotNull(logger2b);
 480             assertEquals(logger2, global);
 481             assertEquals(logger2b, global);
 482             Logger logger3 = manager.getLogger("");
 483             Logger logger3b = manager.getLogger("");
 484             assertNull(logger3);
 485             assertNull(logger3b);
 486             Logger root = new Bridge.CustomLogger("");
 487             manager.addLogger(root);
 488             Logger logger4 = manager.getLogger("");
 489             Logger logger4b = manager.getLogger("");
 490             assertNotNull(logger4);
 491             assertNotNull(logger4b);
 492             assertEquals(logger4, root);
 493             assertEquals(logger4b, root);
 494 
 495             for (int j = 0 ; j < 3 ; j++) {
 496                 Bridge.changeContext();
 497 
 498                 // this is not a supported configuration:
 499                 // We are in an applet context with several log managers.
 500                 // We however need to check our assumptions...
 501 
 502                 // Applet context => root logger and global logger should also be null.
 503 
 504                 Logger logger5 = manager.getLogger("");
 505                 Logger logger5b = manager.getLogger("");
 506                 Logger expectedRoot = (System.getSecurityManager() == null ? root : null);
 507                 assertEquals(logger5, expectedRoot);
 508                 assertEquals(logger5b, expectedRoot);
 509 
 510                 if (System.getSecurityManager() != null) {
 511                     assertNull(manager.getLogger(Logger.GLOBAL_LOGGER_NAME));
 512                 } else {
 513                     assertEquals(global, manager.getLogger(Logger.GLOBAL_LOGGER_NAME));
 514                 }
 515 
 516                 Logger global2 = new Bridge.CustomLogger(Logger.GLOBAL_LOGGER_NAME);
 517                 manager.addLogger(global2);
 518                 Logger logger6 = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 519                 Logger logger6b = manager.getLogger(Logger.GLOBAL_LOGGER_NAME);
 520                 Logger expectedGlobal = (System.getSecurityManager() == null ? global : global2);
 521 
 522                 assertNotNull(logger6);
 523                 assertNotNull(logger6b);
 524                 assertEquals(logger6, expectedGlobal);
 525                 assertEquals(logger6b, expectedGlobal);
 526                 if (System.getSecurityManager() != null) {
 527                     assertNull(manager.getLogger(""));
 528                 } else {
 529                     assertEquals(root, manager.getLogger(""));
 530                 }
 531 
 532                 Logger root2 = new Bridge.CustomLogger("");
 533                 manager.addLogger(root2);
 534                 expectedRoot = (System.getSecurityManager() == null ? root : root2);
 535                 Logger logger7 = manager.getLogger("");
 536                 Logger logger7b = manager.getLogger("");
 537                 assertNotNull(logger7);
 538                 assertNotNull(logger7b);
 539                 assertEquals(logger7, expectedRoot);
 540                 assertEquals(logger7b, expectedRoot);
 541             }
 542         }
 543     }
 544 
 545     public static void testParent(Logger logger) {
 546         Logger l = logger;
 547         while (l.getParent() != null) {
 548             l = l.getParent();
 549         }
 550         assertEquals("", l.getName());
 551     }
 552 
 553     public static class TestError extends RuntimeException {
 554         public TestError(String msg) {
 555             super(msg);
 556         }
 557     }
 558 
 559     public static void assertNotNull(Object obj) {
 560         if (obj == null) throw new NullPointerException();
 561     }
 562 
 563     public static void assertNull(Object obj) {
 564         if (obj != null) throw new TestError("Null expected, got "+obj);
 565     }
 566 
 567     public static void assertEquals(Object o1, Object o2) {
 568         if (o1 != o2) {
 569             throw new TestError(o1 + " != " + o2);
 570         }
 571     }
 572 
 573     public static void assertNotEquals(Object o1, Object o2) {
 574         if (o1 == o2) {
 575             throw new TestError(o1 + " == " + o2);
 576         }
 577     }
 578 }