1 |
/* |
2 |
* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
* Expert Group and released to the public domain, as explained at |
4 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
5 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
6 |
* Pat Fisher, Mike Judd. |
7 |
*/ |
8 |
|
9 |
import junit.framework.*; |
10 |
import java.io.ByteArrayInputStream; |
11 |
import java.io.ByteArrayOutputStream; |
12 |
import java.io.ObjectInputStream; |
13 |
import java.io.ObjectOutputStream; |
14 |
import java.util.ArrayList; |
15 |
import java.util.Arrays; |
16 |
import java.util.Date; |
17 |
import java.util.Enumeration; |
18 |
import java.util.List; |
19 |
import java.util.NoSuchElementException; |
20 |
import java.util.PropertyPermission; |
21 |
import java.util.concurrent.*; |
22 |
import java.util.concurrent.atomic.AtomicBoolean; |
23 |
import java.util.concurrent.atomic.AtomicReference; |
24 |
import static java.util.concurrent.TimeUnit.MILLISECONDS; |
25 |
import static java.util.concurrent.TimeUnit.NANOSECONDS; |
26 |
import java.security.CodeSource; |
27 |
import java.security.Permission; |
28 |
import java.security.PermissionCollection; |
29 |
import java.security.Permissions; |
30 |
import java.security.Policy; |
31 |
import java.security.ProtectionDomain; |
32 |
import java.security.SecurityPermission; |
33 |
|
34 |
/** |
35 |
* Base class for JSR166 Junit TCK tests. Defines some constants, |
36 |
* utility methods and classes, as well as a simple framework for |
37 |
* helping to make sure that assertions failing in generated threads |
38 |
* cause the associated test that generated them to itself fail (which |
39 |
* JUnit does not otherwise arrange). The rules for creating such |
40 |
* tests are: |
41 |
* |
42 |
* <ol> |
43 |
* |
44 |
* <li> All assertions in code running in generated threads must use |
45 |
* the forms {@link #threadFail}, {@link #threadAssertTrue}, {@link |
46 |
* #threadAssertEquals}, or {@link #threadAssertNull}, (not |
47 |
* {@code fail}, {@code assertTrue}, etc.) It is OK (but not |
48 |
* particularly recommended) for other code to use these forms too. |
49 |
* Only the most typically used JUnit assertion methods are defined |
50 |
* this way, but enough to live with.</li> |
51 |
* |
52 |
* <li> If you override {@link #setUp} or {@link #tearDown}, make sure |
53 |
* to invoke {@code super.setUp} and {@code super.tearDown} within |
54 |
* them. These methods are used to clear and check for thread |
55 |
* assertion failures.</li> |
56 |
* |
57 |
* <li>All delays and timeouts must use one of the constants {@code |
58 |
* SHORT_DELAY_MS}, {@code SMALL_DELAY_MS}, {@code MEDIUM_DELAY_MS}, |
59 |
* {@code LONG_DELAY_MS}. The idea here is that a SHORT is always |
60 |
* discriminable from zero time, and always allows enough time for the |
61 |
* small amounts of computation (creating a thread, calling a few |
62 |
* methods, etc) needed to reach a timeout point. Similarly, a SMALL |
63 |
* is always discriminable as larger than SHORT and smaller than |
64 |
* MEDIUM. And so on. These constants are set to conservative values, |
65 |
* but even so, if there is ever any doubt, they can all be increased |
66 |
* in one spot to rerun tests on slower platforms.</li> |
67 |
* |
68 |
* <li> All threads generated must be joined inside each test case |
69 |
* method (or {@code fail} to do so) before returning from the |
70 |
* method. The {@code joinPool} method can be used to do this when |
71 |
* using Executors.</li> |
72 |
* |
73 |
* </ol> |
74 |
* |
75 |
* <p><b>Other notes</b> |
76 |
* <ul> |
77 |
* |
78 |
* <li> Usually, there is one testcase method per JSR166 method |
79 |
* covering "normal" operation, and then as many exception-testing |
80 |
* methods as there are exceptions the method can throw. Sometimes |
81 |
* there are multiple tests per JSR166 method when the different |
82 |
* "normal" behaviors differ significantly. And sometimes testcases |
83 |
* cover multiple methods when they cannot be tested in |
84 |
* isolation.</li> |
85 |
* |
86 |
* <li> The documentation style for testcases is to provide as javadoc |
87 |
* a simple sentence or two describing the property that the testcase |
88 |
* method purports to test. The javadocs do not say anything about how |
89 |
* the property is tested. To find out, read the code.</li> |
90 |
* |
91 |
* <li> These tests are "conformance tests", and do not attempt to |
92 |
* test throughput, latency, scalability or other performance factors |
93 |
* (see the separate "jtreg" tests for a set intended to check these |
94 |
* for the most central aspects of functionality.) So, most tests use |
95 |
* the smallest sensible numbers of threads, collection sizes, etc |
96 |
* needed to check basic conformance.</li> |
97 |
* |
98 |
* <li>The test classes currently do not declare inclusion in |
99 |
* any particular package to simplify things for people integrating |
100 |
* them in TCK test suites.</li> |
101 |
* |
102 |
* <li> As a convenience, the {@code main} of this class (JSR166TestCase) |
103 |
* runs all JSR166 unit tests.</li> |
104 |
* |
105 |
* </ul> |
106 |
*/ |
107 |
public class JSR166TestCase extends TestCase { |
108 |
private static final boolean useSecurityManager = |
109 |
Boolean.getBoolean("jsr166.useSecurityManager"); |
110 |
|
111 |
protected static final boolean expensiveTests = |
112 |
Boolean.getBoolean("jsr166.expensiveTests"); |
113 |
|
114 |
/** |
115 |
* If true, report on stdout all "slow" tests, that is, ones that |
116 |
* take more than profileThreshold milliseconds to execute. |
117 |
*/ |
118 |
private static final boolean profileTests = |
119 |
Boolean.getBoolean("jsr166.profileTests"); |
120 |
|
121 |
/** |
122 |
* The number of milliseconds that tests are permitted for |
123 |
* execution without being reported, when profileTests is set. |
124 |
*/ |
125 |
private static final long profileThreshold = |
126 |
Long.getLong("jsr166.profileThreshold", 100); |
127 |
|
128 |
protected void runTest() throws Throwable { |
129 |
if (profileTests) |
130 |
runTestProfiled(); |
131 |
else |
132 |
super.runTest(); |
133 |
} |
134 |
|
135 |
protected void runTestProfiled() throws Throwable { |
136 |
long t0 = System.nanoTime(); |
137 |
try { |
138 |
super.runTest(); |
139 |
} finally { |
140 |
long elapsedMillis = |
141 |
(System.nanoTime() - t0) / (1000L * 1000L); |
142 |
if (elapsedMillis >= profileThreshold) |
143 |
System.out.printf("%n%s: %d%n", toString(), elapsedMillis); |
144 |
} |
145 |
} |
146 |
|
147 |
/** |
148 |
* Runs all JSR166 unit tests using junit.textui.TestRunner |
149 |
*/ |
150 |
public static void main(String[] args) { |
151 |
if (useSecurityManager) { |
152 |
System.err.println("Setting a permissive security manager"); |
153 |
Policy.setPolicy(permissivePolicy()); |
154 |
System.setSecurityManager(new SecurityManager()); |
155 |
} |
156 |
int iters = (args.length == 0) ? 1 : Integer.parseInt(args[0]); |
157 |
|
158 |
Test s = suite(); |
159 |
for (int i = 0; i < iters; ++i) { |
160 |
junit.textui.TestRunner.run(s); |
161 |
System.gc(); |
162 |
System.runFinalization(); |
163 |
} |
164 |
System.exit(0); |
165 |
} |
166 |
|
167 |
public static TestSuite newTestSuite(Object... suiteOrClasses) { |
168 |
TestSuite suite = new TestSuite(); |
169 |
for (Object suiteOrClass : suiteOrClasses) { |
170 |
if (suiteOrClass instanceof TestSuite) |
171 |
suite.addTest((TestSuite) suiteOrClass); |
172 |
else if (suiteOrClass instanceof Class) |
173 |
suite.addTest(new TestSuite((Class<?>) suiteOrClass)); |
174 |
else |
175 |
throw new ClassCastException("not a test suite or class"); |
176 |
} |
177 |
return suite; |
178 |
} |
179 |
|
180 |
/** |
181 |
* Collects all JSR166 unit tests as one suite. |
182 |
*/ |
183 |
public static Test suite() { |
184 |
return newTestSuite( |
185 |
ForkJoinPoolTest.suite(), |
186 |
ForkJoinTaskTest.suite(), |
187 |
RecursiveActionTest.suite(), |
188 |
RecursiveTaskTest.suite(), |
189 |
LinkedTransferQueueTest.suite(), |
190 |
PhaserTest.suite(), |
191 |
ThreadLocalRandomTest.suite(), |
192 |
AbstractExecutorServiceTest.suite(), |
193 |
AbstractQueueTest.suite(), |
194 |
AbstractQueuedSynchronizerTest.suite(), |
195 |
AbstractQueuedLongSynchronizerTest.suite(), |
196 |
ArrayBlockingQueueTest.suite(), |
197 |
ArrayDequeTest.suite(), |
198 |
AtomicBooleanTest.suite(), |
199 |
AtomicIntegerArrayTest.suite(), |
200 |
AtomicIntegerFieldUpdaterTest.suite(), |
201 |
AtomicIntegerTest.suite(), |
202 |
AtomicLongArrayTest.suite(), |
203 |
AtomicLongFieldUpdaterTest.suite(), |
204 |
AtomicLongTest.suite(), |
205 |
AtomicMarkableReferenceTest.suite(), |
206 |
AtomicReferenceArrayTest.suite(), |
207 |
AtomicReferenceFieldUpdaterTest.suite(), |
208 |
AtomicReferenceTest.suite(), |
209 |
AtomicStampedReferenceTest.suite(), |
210 |
ConcurrentHashMapTest.suite(), |
211 |
ConcurrentLinkedDequeTest.suite(), |
212 |
ConcurrentLinkedQueueTest.suite(), |
213 |
ConcurrentSkipListMapTest.suite(), |
214 |
ConcurrentSkipListSubMapTest.suite(), |
215 |
ConcurrentSkipListSetTest.suite(), |
216 |
ConcurrentSkipListSubSetTest.suite(), |
217 |
CopyOnWriteArrayListTest.suite(), |
218 |
CopyOnWriteArraySetTest.suite(), |
219 |
CountDownLatchTest.suite(), |
220 |
CyclicBarrierTest.suite(), |
221 |
DelayQueueTest.suite(), |
222 |
EntryTest.suite(), |
223 |
ExchangerTest.suite(), |
224 |
ExecutorsTest.suite(), |
225 |
ExecutorCompletionServiceTest.suite(), |
226 |
FutureTaskTest.suite(), |
227 |
LinkedBlockingDequeTest.suite(), |
228 |
LinkedBlockingQueueTest.suite(), |
229 |
LinkedListTest.suite(), |
230 |
LockSupportTest.suite(), |
231 |
PriorityBlockingQueueTest.suite(), |
232 |
PriorityQueueTest.suite(), |
233 |
ReentrantLockTest.suite(), |
234 |
ReentrantReadWriteLockTest.suite(), |
235 |
ScheduledExecutorTest.suite(), |
236 |
ScheduledExecutorSubclassTest.suite(), |
237 |
SemaphoreTest.suite(), |
238 |
SynchronousQueueTest.suite(), |
239 |
SystemTest.suite(), |
240 |
ThreadLocalTest.suite(), |
241 |
ThreadPoolExecutorTest.suite(), |
242 |
ThreadPoolExecutorSubclassTest.suite(), |
243 |
ThreadTest.suite(), |
244 |
TimeUnitTest.suite(), |
245 |
TreeMapTest.suite(), |
246 |
TreeSetTest.suite(), |
247 |
TreeSubMapTest.suite(), |
248 |
TreeSubSetTest.suite()); |
249 |
} |
250 |
|
251 |
|
252 |
public static long SHORT_DELAY_MS; |
253 |
public static long SMALL_DELAY_MS; |
254 |
public static long MEDIUM_DELAY_MS; |
255 |
public static long LONG_DELAY_MS; |
256 |
|
257 |
|
258 |
/** |
259 |
* Returns the shortest timed delay. This could |
260 |
* be reimplemented to use for example a Property. |
261 |
*/ |
262 |
protected long getShortDelay() { |
263 |
return 50; |
264 |
} |
265 |
|
266 |
/** |
267 |
* Sets delays as multiples of SHORT_DELAY. |
268 |
*/ |
269 |
protected void setDelays() { |
270 |
SHORT_DELAY_MS = getShortDelay(); |
271 |
SMALL_DELAY_MS = SHORT_DELAY_MS * 5; |
272 |
MEDIUM_DELAY_MS = SHORT_DELAY_MS * 10; |
273 |
LONG_DELAY_MS = SHORT_DELAY_MS * 200; |
274 |
} |
275 |
|
276 |
/** |
277 |
* Returns a timeout in milliseconds to be used in tests that |
278 |
* verify that operations block or time out. |
279 |
*/ |
280 |
long timeoutMillis() { |
281 |
return SHORT_DELAY_MS / 4; |
282 |
} |
283 |
|
284 |
/** |
285 |
* Returns a new Date instance representing a time delayMillis |
286 |
* milliseconds in the future. |
287 |
*/ |
288 |
Date delayedDate(long delayMillis) { |
289 |
return new Date(System.currentTimeMillis() + delayMillis); |
290 |
} |
291 |
|
292 |
/** |
293 |
* The first exception encountered if any threadAssertXXX method fails. |
294 |
*/ |
295 |
private final AtomicReference<Throwable> threadFailure |
296 |
= new AtomicReference<Throwable>(null); |
297 |
|
298 |
/** |
299 |
* Records an exception so that it can be rethrown later in the test |
300 |
* harness thread, triggering a test case failure. Only the first |
301 |
* failure is recorded; subsequent calls to this method from within |
302 |
* the same test have no effect. |
303 |
*/ |
304 |
public void threadRecordFailure(Throwable t) { |
305 |
threadFailure.compareAndSet(null, t); |
306 |
} |
307 |
|
308 |
public void setUp() { |
309 |
setDelays(); |
310 |
} |
311 |
|
312 |
/** |
313 |
* Extra checks that get done for all test cases. |
314 |
* |
315 |
* Triggers test case failure if any thread assertions have failed, |
316 |
* by rethrowing, in the test harness thread, any exception recorded |
317 |
* earlier by threadRecordFailure. |
318 |
* |
319 |
* Triggers test case failure if interrupt status is set in the main thread. |
320 |
*/ |
321 |
public void tearDown() throws Exception { |
322 |
Throwable t = threadFailure.getAndSet(null); |
323 |
if (t != null) { |
324 |
if (t instanceof Error) |
325 |
throw (Error) t; |
326 |
else if (t instanceof RuntimeException) |
327 |
throw (RuntimeException) t; |
328 |
else if (t instanceof Exception) |
329 |
throw (Exception) t; |
330 |
else { |
331 |
AssertionFailedError afe = |
332 |
new AssertionFailedError(t.toString()); |
333 |
afe.initCause(t); |
334 |
throw afe; |
335 |
} |
336 |
} |
337 |
|
338 |
if (Thread.interrupted()) |
339 |
throw new AssertionFailedError("interrupt status set in main thread"); |
340 |
} |
341 |
|
342 |
/** |
343 |
* Just like fail(reason), but additionally recording (using |
344 |
* threadRecordFailure) any AssertionFailedError thrown, so that |
345 |
* the current testcase will fail. |
346 |
*/ |
347 |
public void threadFail(String reason) { |
348 |
try { |
349 |
fail(reason); |
350 |
} catch (AssertionFailedError t) { |
351 |
threadRecordFailure(t); |
352 |
fail(reason); |
353 |
} |
354 |
} |
355 |
|
356 |
/** |
357 |
* Just like assertTrue(b), but additionally recording (using |
358 |
* threadRecordFailure) any AssertionFailedError thrown, so that |
359 |
* the current testcase will fail. |
360 |
*/ |
361 |
public void threadAssertTrue(boolean b) { |
362 |
try { |
363 |
assertTrue(b); |
364 |
} catch (AssertionFailedError t) { |
365 |
threadRecordFailure(t); |
366 |
throw t; |
367 |
} |
368 |
} |
369 |
|
370 |
/** |
371 |
* Just like assertFalse(b), but additionally recording (using |
372 |
* threadRecordFailure) any AssertionFailedError thrown, so that |
373 |
* the current testcase will fail. |
374 |
*/ |
375 |
public void threadAssertFalse(boolean b) { |
376 |
try { |
377 |
assertFalse(b); |
378 |
} catch (AssertionFailedError t) { |
379 |
threadRecordFailure(t); |
380 |
throw t; |
381 |
} |
382 |
} |
383 |
|
384 |
/** |
385 |
* Just like assertNull(x), but additionally recording (using |
386 |
* threadRecordFailure) any AssertionFailedError thrown, so that |
387 |
* the current testcase will fail. |
388 |
*/ |
389 |
public void threadAssertNull(Object x) { |
390 |
try { |
391 |
assertNull(x); |
392 |
} catch (AssertionFailedError t) { |
393 |
threadRecordFailure(t); |
394 |
throw t; |
395 |
} |
396 |
} |
397 |
|
398 |
/** |
399 |
* Just like assertEquals(x, y), but additionally recording (using |
400 |
* threadRecordFailure) any AssertionFailedError thrown, so that |
401 |
* the current testcase will fail. |
402 |
*/ |
403 |
public void threadAssertEquals(long x, long y) { |
404 |
try { |
405 |
assertEquals(x, y); |
406 |
} catch (AssertionFailedError t) { |
407 |
threadRecordFailure(t); |
408 |
throw t; |
409 |
} |
410 |
} |
411 |
|
412 |
/** |
413 |
* Just like assertEquals(x, y), but additionally recording (using |
414 |
* threadRecordFailure) any AssertionFailedError thrown, so that |
415 |
* the current testcase will fail. |
416 |
*/ |
417 |
public void threadAssertEquals(Object x, Object y) { |
418 |
try { |
419 |
assertEquals(x, y); |
420 |
} catch (AssertionFailedError t) { |
421 |
threadRecordFailure(t); |
422 |
throw t; |
423 |
} catch (Throwable t) { |
424 |
threadUnexpectedException(t); |
425 |
} |
426 |
} |
427 |
|
428 |
/** |
429 |
* Just like assertSame(x, y), but additionally recording (using |
430 |
* threadRecordFailure) any AssertionFailedError thrown, so that |
431 |
* the current testcase will fail. |
432 |
*/ |
433 |
public void threadAssertSame(Object x, Object y) { |
434 |
try { |
435 |
assertSame(x, y); |
436 |
} catch (AssertionFailedError t) { |
437 |
threadRecordFailure(t); |
438 |
throw t; |
439 |
} |
440 |
} |
441 |
|
442 |
/** |
443 |
* Calls threadFail with message "should throw exception". |
444 |
*/ |
445 |
public void threadShouldThrow() { |
446 |
threadFail("should throw exception"); |
447 |
} |
448 |
|
449 |
/** |
450 |
* Calls threadFail with message "should throw" + exceptionName. |
451 |
*/ |
452 |
public void threadShouldThrow(String exceptionName) { |
453 |
threadFail("should throw " + exceptionName); |
454 |
} |
455 |
|
456 |
/** |
457 |
* Records the given exception using {@link #threadRecordFailure}, |
458 |
* then rethrows the exception, wrapping it in an |
459 |
* AssertionFailedError if necessary. |
460 |
*/ |
461 |
public void threadUnexpectedException(Throwable t) { |
462 |
threadRecordFailure(t); |
463 |
t.printStackTrace(); |
464 |
if (t instanceof RuntimeException) |
465 |
throw (RuntimeException) t; |
466 |
else if (t instanceof Error) |
467 |
throw (Error) t; |
468 |
else { |
469 |
AssertionFailedError afe = |
470 |
new AssertionFailedError("unexpected exception: " + t); |
471 |
afe.initCause(t); |
472 |
throw afe; |
473 |
} |
474 |
} |
475 |
|
476 |
/** |
477 |
* Delays, via Thread.sleep, for the given millisecond delay, but |
478 |
* if the sleep is shorter than specified, may re-sleep or yield |
479 |
* until time elapses. |
480 |
*/ |
481 |
static void delay(long millis) throws InterruptedException { |
482 |
long startTime = System.nanoTime(); |
483 |
long ns = millis * 1000 * 1000; |
484 |
for (;;) { |
485 |
if (millis > 0L) |
486 |
Thread.sleep(millis); |
487 |
else // too short to sleep |
488 |
Thread.yield(); |
489 |
long d = ns - (System.nanoTime() - startTime); |
490 |
if (d > 0L) |
491 |
millis = d / (1000 * 1000); |
492 |
else |
493 |
break; |
494 |
} |
495 |
} |
496 |
|
497 |
/** |
498 |
* Waits out termination of a thread pool or fails doing so. |
499 |
*/ |
500 |
void joinPool(ExecutorService exec) { |
501 |
try { |
502 |
exec.shutdown(); |
503 |
assertTrue("ExecutorService did not terminate in a timely manner", |
504 |
exec.awaitTermination(2 * LONG_DELAY_MS, MILLISECONDS)); |
505 |
} catch (SecurityException ok) { |
506 |
// Allowed in case test doesn't have privs |
507 |
} catch (InterruptedException ie) { |
508 |
fail("Unexpected InterruptedException"); |
509 |
} |
510 |
} |
511 |
|
512 |
/** |
513 |
* Checks that thread does not terminate within the default |
514 |
* millisecond delay of {@code timeoutMillis()}. |
515 |
*/ |
516 |
void assertThreadStaysAlive(Thread thread) { |
517 |
assertThreadStaysAlive(thread, timeoutMillis()); |
518 |
} |
519 |
|
520 |
/** |
521 |
* Checks that thread does not terminate within the given millisecond delay. |
522 |
*/ |
523 |
void assertThreadStaysAlive(Thread thread, long millis) { |
524 |
try { |
525 |
// No need to optimize the failing case via Thread.join. |
526 |
delay(millis); |
527 |
assertTrue(thread.isAlive()); |
528 |
} catch (InterruptedException ie) { |
529 |
fail("Unexpected InterruptedException"); |
530 |
} |
531 |
} |
532 |
|
533 |
/** |
534 |
* Checks that the threads do not terminate within the default |
535 |
* millisecond delay of {@code timeoutMillis()}. |
536 |
*/ |
537 |
void assertThreadsStayAlive(Thread... threads) { |
538 |
assertThreadsStayAlive(timeoutMillis(), threads); |
539 |
} |
540 |
|
541 |
/** |
542 |
* Checks that the threads do not terminate within the given millisecond delay. |
543 |
*/ |
544 |
void assertThreadsStayAlive(long millis, Thread... threads) { |
545 |
try { |
546 |
// No need to optimize the failing case via Thread.join. |
547 |
delay(millis); |
548 |
for (Thread thread : threads) |
549 |
assertTrue(thread.isAlive()); |
550 |
} catch (InterruptedException ie) { |
551 |
fail("Unexpected InterruptedException"); |
552 |
} |
553 |
} |
554 |
|
555 |
/** |
556 |
* Checks that future.get times out, with the default timeout of |
557 |
* {@code timeoutMillis()}. |
558 |
*/ |
559 |
void assertFutureTimesOut(Future future) { |
560 |
assertFutureTimesOut(future, timeoutMillis()); |
561 |
} |
562 |
|
563 |
/** |
564 |
* Checks that future.get times out, with the given millisecond timeout. |
565 |
*/ |
566 |
void assertFutureTimesOut(Future future, long timeoutMillis) { |
567 |
long startTime = System.nanoTime(); |
568 |
try { |
569 |
future.get(timeoutMillis, MILLISECONDS); |
570 |
shouldThrow(); |
571 |
} catch (TimeoutException success) { |
572 |
} catch (Exception e) { |
573 |
threadUnexpectedException(e); |
574 |
} finally { future.cancel(true); } |
575 |
assertTrue(millisElapsedSince(startTime) >= timeoutMillis); |
576 |
} |
577 |
|
578 |
/** |
579 |
* Fails with message "should throw exception". |
580 |
*/ |
581 |
public void shouldThrow() { |
582 |
fail("Should throw exception"); |
583 |
} |
584 |
|
585 |
/** |
586 |
* Fails with message "should throw " + exceptionName. |
587 |
*/ |
588 |
public void shouldThrow(String exceptionName) { |
589 |
fail("Should throw " + exceptionName); |
590 |
} |
591 |
|
592 |
/** |
593 |
* The number of elements to place in collections, arrays, etc. |
594 |
*/ |
595 |
public static final int SIZE = 20; |
596 |
|
597 |
// Some convenient Integer constants |
598 |
|
599 |
public static final Integer zero = new Integer(0); |
600 |
public static final Integer one = new Integer(1); |
601 |
public static final Integer two = new Integer(2); |
602 |
public static final Integer three = new Integer(3); |
603 |
public static final Integer four = new Integer(4); |
604 |
public static final Integer five = new Integer(5); |
605 |
public static final Integer six = new Integer(6); |
606 |
public static final Integer seven = new Integer(7); |
607 |
public static final Integer eight = new Integer(8); |
608 |
public static final Integer nine = new Integer(9); |
609 |
public static final Integer m1 = new Integer(-1); |
610 |
public static final Integer m2 = new Integer(-2); |
611 |
public static final Integer m3 = new Integer(-3); |
612 |
public static final Integer m4 = new Integer(-4); |
613 |
public static final Integer m5 = new Integer(-5); |
614 |
public static final Integer m6 = new Integer(-6); |
615 |
public static final Integer m10 = new Integer(-10); |
616 |
|
617 |
|
618 |
/** |
619 |
* Runs Runnable r with a security policy that permits precisely |
620 |
* the specified permissions. If there is no current security |
621 |
* manager, the runnable is run twice, both with and without a |
622 |
* security manager. We require that any security manager permit |
623 |
* getPolicy/setPolicy. |
624 |
*/ |
625 |
public void runWithPermissions(Runnable r, Permission... permissions) { |
626 |
SecurityManager sm = System.getSecurityManager(); |
627 |
if (sm == null) { |
628 |
r.run(); |
629 |
} |
630 |
runWithSecurityManagerWithPermissions(r, permissions); |
631 |
} |
632 |
|
633 |
/** |
634 |
* Runs Runnable r with a security policy that permits precisely |
635 |
* the specified permissions. If there is no current security |
636 |
* manager, a temporary one is set for the duration of the |
637 |
* Runnable. We require that any security manager permit |
638 |
* getPolicy/setPolicy. |
639 |
*/ |
640 |
public void runWithSecurityManagerWithPermissions(Runnable r, |
641 |
Permission... permissions) { |
642 |
SecurityManager sm = System.getSecurityManager(); |
643 |
if (sm == null) { |
644 |
Policy savedPolicy = Policy.getPolicy(); |
645 |
try { |
646 |
Policy.setPolicy(permissivePolicy()); |
647 |
System.setSecurityManager(new SecurityManager()); |
648 |
runWithSecurityManagerWithPermissions(r, permissions); |
649 |
} finally { |
650 |
System.setSecurityManager(null); |
651 |
Policy.setPolicy(savedPolicy); |
652 |
} |
653 |
} else { |
654 |
Policy savedPolicy = Policy.getPolicy(); |
655 |
AdjustablePolicy policy = new AdjustablePolicy(permissions); |
656 |
Policy.setPolicy(policy); |
657 |
|
658 |
try { |
659 |
r.run(); |
660 |
} finally { |
661 |
policy.addPermission(new SecurityPermission("setPolicy")); |
662 |
Policy.setPolicy(savedPolicy); |
663 |
} |
664 |
} |
665 |
} |
666 |
|
667 |
/** |
668 |
* Runs a runnable without any permissions. |
669 |
*/ |
670 |
public void runWithoutPermissions(Runnable r) { |
671 |
runWithPermissions(r); |
672 |
} |
673 |
|
674 |
/** |
675 |
* A security policy where new permissions can be dynamically added |
676 |
* or all cleared. |
677 |
*/ |
678 |
public static class AdjustablePolicy extends java.security.Policy { |
679 |
Permissions perms = new Permissions(); |
680 |
AdjustablePolicy(Permission... permissions) { |
681 |
for (Permission permission : permissions) |
682 |
perms.add(permission); |
683 |
} |
684 |
void addPermission(Permission perm) { perms.add(perm); } |
685 |
void clearPermissions() { perms = new Permissions(); } |
686 |
public PermissionCollection getPermissions(CodeSource cs) { |
687 |
return perms; |
688 |
} |
689 |
public PermissionCollection getPermissions(ProtectionDomain pd) { |
690 |
return perms; |
691 |
} |
692 |
public boolean implies(ProtectionDomain pd, Permission p) { |
693 |
return perms.implies(p); |
694 |
} |
695 |
public void refresh() {} |
696 |
public String toString() { |
697 |
List<Permission> ps = new ArrayList<Permission>(); |
698 |
for (Enumeration<Permission> e = perms.elements(); e.hasMoreElements();) |
699 |
ps.add(e.nextElement()); |
700 |
return "AdjustablePolicy with permissions " + ps; |
701 |
} |
702 |
} |
703 |
|
704 |
/** |
705 |
* Returns a policy containing all the permissions we ever need. |
706 |
*/ |
707 |
public static Policy permissivePolicy() { |
708 |
return new AdjustablePolicy |
709 |
// Permissions j.u.c. needs directly |
710 |
(new RuntimePermission("modifyThread"), |
711 |
new RuntimePermission("getClassLoader"), |
712 |
new RuntimePermission("setContextClassLoader"), |
713 |
// Permissions needed to change permissions! |
714 |
new SecurityPermission("getPolicy"), |
715 |
new SecurityPermission("setPolicy"), |
716 |
new RuntimePermission("setSecurityManager"), |
717 |
// Permissions needed by the junit test harness |
718 |
new RuntimePermission("accessDeclaredMembers"), |
719 |
new PropertyPermission("*", "read"), |
720 |
new java.io.FilePermission("<<ALL FILES>>", "read")); |
721 |
} |
722 |
|
723 |
/** |
724 |
* Sleeps until the given time has elapsed. |
725 |
* Throws AssertionFailedError if interrupted. |
726 |
*/ |
727 |
void sleep(long millis) { |
728 |
try { |
729 |
delay(millis); |
730 |
} catch (InterruptedException ie) { |
731 |
AssertionFailedError afe = |
732 |
new AssertionFailedError("Unexpected InterruptedException"); |
733 |
afe.initCause(ie); |
734 |
throw afe; |
735 |
} |
736 |
} |
737 |
|
738 |
/** |
739 |
* Spin-waits up to the specified number of milliseconds for the given |
740 |
* thread to enter a wait state: BLOCKED, WAITING, or TIMED_WAITING. |
741 |
*/ |
742 |
void waitForThreadToEnterWaitState(Thread thread, long timeoutMillis) { |
743 |
long startTime = System.nanoTime(); |
744 |
for (;;) { |
745 |
Thread.State s = thread.getState(); |
746 |
if (s == Thread.State.BLOCKED || |
747 |
s == Thread.State.WAITING || |
748 |
s == Thread.State.TIMED_WAITING) |
749 |
return; |
750 |
else if (s == Thread.State.TERMINATED) |
751 |
fail("Unexpected thread termination"); |
752 |
else if (millisElapsedSince(startTime) > timeoutMillis) { |
753 |
threadAssertTrue(thread.isAlive()); |
754 |
return; |
755 |
} |
756 |
Thread.yield(); |
757 |
} |
758 |
} |
759 |
|
760 |
/** |
761 |
* Waits up to LONG_DELAY_MS for the given thread to enter a wait |
762 |
* state: BLOCKED, WAITING, or TIMED_WAITING. |
763 |
*/ |
764 |
void waitForThreadToEnterWaitState(Thread thread) { |
765 |
waitForThreadToEnterWaitState(thread, LONG_DELAY_MS); |
766 |
} |
767 |
|
768 |
/** |
769 |
* Returns the number of milliseconds since time given by |
770 |
* startNanoTime, which must have been previously returned from a |
771 |
* call to {@link System.nanoTime()}. |
772 |
*/ |
773 |
long millisElapsedSince(long startNanoTime) { |
774 |
return NANOSECONDS.toMillis(System.nanoTime() - startNanoTime); |
775 |
} |
776 |
|
777 |
/** |
778 |
* Returns a new started daemon Thread running the given runnable. |
779 |
*/ |
780 |
Thread newStartedThread(Runnable runnable) { |
781 |
Thread t = new Thread(runnable); |
782 |
t.setDaemon(true); |
783 |
t.start(); |
784 |
return t; |
785 |
} |
786 |
|
787 |
/** |
788 |
* Waits for the specified time (in milliseconds) for the thread |
789 |
* to terminate (using {@link Thread#join(long)}), else interrupts |
790 |
* the thread (in the hope that it may terminate later) and fails. |
791 |
*/ |
792 |
void awaitTermination(Thread t, long timeoutMillis) { |
793 |
try { |
794 |
t.join(timeoutMillis); |
795 |
} catch (InterruptedException ie) { |
796 |
threadUnexpectedException(ie); |
797 |
} finally { |
798 |
if (t.getState() != Thread.State.TERMINATED) { |
799 |
t.interrupt(); |
800 |
fail("Test timed out"); |
801 |
} |
802 |
} |
803 |
} |
804 |
|
805 |
/** |
806 |
* Waits for LONG_DELAY_MS milliseconds for the thread to |
807 |
* terminate (using {@link Thread#join(long)}), else interrupts |
808 |
* the thread (in the hope that it may terminate later) and fails. |
809 |
*/ |
810 |
void awaitTermination(Thread t) { |
811 |
awaitTermination(t, LONG_DELAY_MS); |
812 |
} |
813 |
|
814 |
// Some convenient Runnable classes |
815 |
|
816 |
public abstract class CheckedRunnable implements Runnable { |
817 |
protected abstract void realRun() throws Throwable; |
818 |
|
819 |
public final void run() { |
820 |
try { |
821 |
realRun(); |
822 |
} catch (Throwable t) { |
823 |
threadUnexpectedException(t); |
824 |
} |
825 |
} |
826 |
} |
827 |
|
828 |
public abstract class RunnableShouldThrow implements Runnable { |
829 |
protected abstract void realRun() throws Throwable; |
830 |
|
831 |
final Class<?> exceptionClass; |
832 |
|
833 |
<T extends Throwable> RunnableShouldThrow(Class<T> exceptionClass) { |
834 |
this.exceptionClass = exceptionClass; |
835 |
} |
836 |
|
837 |
public final void run() { |
838 |
try { |
839 |
realRun(); |
840 |
threadShouldThrow(exceptionClass.getSimpleName()); |
841 |
} catch (Throwable t) { |
842 |
if (! exceptionClass.isInstance(t)) |
843 |
threadUnexpectedException(t); |
844 |
} |
845 |
} |
846 |
} |
847 |
|
848 |
public abstract class ThreadShouldThrow extends Thread { |
849 |
protected abstract void realRun() throws Throwable; |
850 |
|
851 |
final Class<?> exceptionClass; |
852 |
|
853 |
<T extends Throwable> ThreadShouldThrow(Class<T> exceptionClass) { |
854 |
this.exceptionClass = exceptionClass; |
855 |
} |
856 |
|
857 |
public final void run() { |
858 |
try { |
859 |
realRun(); |
860 |
threadShouldThrow(exceptionClass.getSimpleName()); |
861 |
} catch (Throwable t) { |
862 |
if (! exceptionClass.isInstance(t)) |
863 |
threadUnexpectedException(t); |
864 |
} |
865 |
} |
866 |
} |
867 |
|
868 |
public abstract class CheckedInterruptedRunnable implements Runnable { |
869 |
protected abstract void realRun() throws Throwable; |
870 |
|
871 |
public final void run() { |
872 |
try { |
873 |
realRun(); |
874 |
threadShouldThrow("InterruptedException"); |
875 |
} catch (InterruptedException success) { |
876 |
threadAssertFalse(Thread.interrupted()); |
877 |
} catch (Throwable t) { |
878 |
threadUnexpectedException(t); |
879 |
} |
880 |
} |
881 |
} |
882 |
|
883 |
public abstract class CheckedCallable<T> implements Callable<T> { |
884 |
protected abstract T realCall() throws Throwable; |
885 |
|
886 |
public final T call() { |
887 |
try { |
888 |
return realCall(); |
889 |
} catch (Throwable t) { |
890 |
threadUnexpectedException(t); |
891 |
return null; |
892 |
} |
893 |
} |
894 |
} |
895 |
|
896 |
public abstract class CheckedInterruptedCallable<T> |
897 |
implements Callable<T> { |
898 |
protected abstract T realCall() throws Throwable; |
899 |
|
900 |
public final T call() { |
901 |
try { |
902 |
T result = realCall(); |
903 |
threadShouldThrow("InterruptedException"); |
904 |
return result; |
905 |
} catch (InterruptedException success) { |
906 |
threadAssertFalse(Thread.interrupted()); |
907 |
} catch (Throwable t) { |
908 |
threadUnexpectedException(t); |
909 |
} |
910 |
return null; |
911 |
} |
912 |
} |
913 |
|
914 |
public static class NoOpRunnable implements Runnable { |
915 |
public void run() {} |
916 |
} |
917 |
|
918 |
public static class NoOpCallable implements Callable { |
919 |
public Object call() { return Boolean.TRUE; } |
920 |
} |
921 |
|
922 |
public static final String TEST_STRING = "a test string"; |
923 |
|
924 |
public static class StringTask implements Callable<String> { |
925 |
public String call() { return TEST_STRING; } |
926 |
} |
927 |
|
928 |
public Callable<String> latchAwaitingStringTask(final CountDownLatch latch) { |
929 |
return new CheckedCallable<String>() { |
930 |
protected String realCall() { |
931 |
try { |
932 |
latch.await(); |
933 |
} catch (InterruptedException quittingTime) {} |
934 |
return TEST_STRING; |
935 |
}}; |
936 |
} |
937 |
|
938 |
public Runnable awaiter(final CountDownLatch latch) { |
939 |
return new CheckedRunnable() { |
940 |
public void realRun() throws InterruptedException { |
941 |
await(latch); |
942 |
}}; |
943 |
} |
944 |
|
945 |
public void await(CountDownLatch latch) { |
946 |
try { |
947 |
assertTrue(latch.await(LONG_DELAY_MS, MILLISECONDS)); |
948 |
} catch (Throwable t) { |
949 |
threadUnexpectedException(t); |
950 |
} |
951 |
} |
952 |
|
953 |
public void await(Semaphore semaphore) { |
954 |
try { |
955 |
assertTrue(semaphore.tryAcquire(LONG_DELAY_MS, MILLISECONDS)); |
956 |
} catch (Throwable t) { |
957 |
threadUnexpectedException(t); |
958 |
} |
959 |
} |
960 |
|
961 |
// /** |
962 |
// * Spin-waits up to LONG_DELAY_MS until flag becomes true. |
963 |
// */ |
964 |
// public void await(AtomicBoolean flag) { |
965 |
// await(flag, LONG_DELAY_MS); |
966 |
// } |
967 |
|
968 |
// /** |
969 |
// * Spin-waits up to the specified timeout until flag becomes true. |
970 |
// */ |
971 |
// public void await(AtomicBoolean flag, long timeoutMillis) { |
972 |
// long startTime = System.nanoTime(); |
973 |
// while (!flag.get()) { |
974 |
// if (millisElapsedSince(startTime) > timeoutMillis) |
975 |
// throw new AssertionFailedError("timed out"); |
976 |
// Thread.yield(); |
977 |
// } |
978 |
// } |
979 |
|
980 |
public static class NPETask implements Callable<String> { |
981 |
public String call() { throw new NullPointerException(); } |
982 |
} |
983 |
|
984 |
public static class CallableOne implements Callable<Integer> { |
985 |
public Integer call() { return one; } |
986 |
} |
987 |
|
988 |
public class ShortRunnable extends CheckedRunnable { |
989 |
protected void realRun() throws Throwable { |
990 |
delay(SHORT_DELAY_MS); |
991 |
} |
992 |
} |
993 |
|
994 |
public class ShortInterruptedRunnable extends CheckedInterruptedRunnable { |
995 |
protected void realRun() throws InterruptedException { |
996 |
delay(SHORT_DELAY_MS); |
997 |
} |
998 |
} |
999 |
|
1000 |
public class SmallRunnable extends CheckedRunnable { |
1001 |
protected void realRun() throws Throwable { |
1002 |
delay(SMALL_DELAY_MS); |
1003 |
} |
1004 |
} |
1005 |
|
1006 |
public class SmallPossiblyInterruptedRunnable extends CheckedRunnable { |
1007 |
protected void realRun() { |
1008 |
try { |
1009 |
delay(SMALL_DELAY_MS); |
1010 |
} catch (InterruptedException ok) {} |
1011 |
} |
1012 |
} |
1013 |
|
1014 |
public class SmallCallable extends CheckedCallable { |
1015 |
protected Object realCall() throws InterruptedException { |
1016 |
delay(SMALL_DELAY_MS); |
1017 |
return Boolean.TRUE; |
1018 |
} |
1019 |
} |
1020 |
|
1021 |
public class MediumRunnable extends CheckedRunnable { |
1022 |
protected void realRun() throws Throwable { |
1023 |
delay(MEDIUM_DELAY_MS); |
1024 |
} |
1025 |
} |
1026 |
|
1027 |
public class MediumInterruptedRunnable extends CheckedInterruptedRunnable { |
1028 |
protected void realRun() throws InterruptedException { |
1029 |
delay(MEDIUM_DELAY_MS); |
1030 |
} |
1031 |
} |
1032 |
|
1033 |
public Runnable possiblyInterruptedRunnable(final long timeoutMillis) { |
1034 |
return new CheckedRunnable() { |
1035 |
protected void realRun() { |
1036 |
try { |
1037 |
delay(timeoutMillis); |
1038 |
} catch (InterruptedException ok) {} |
1039 |
}}; |
1040 |
} |
1041 |
|
1042 |
public class MediumPossiblyInterruptedRunnable extends CheckedRunnable { |
1043 |
protected void realRun() { |
1044 |
try { |
1045 |
delay(MEDIUM_DELAY_MS); |
1046 |
} catch (InterruptedException ok) {} |
1047 |
} |
1048 |
} |
1049 |
|
1050 |
public class LongPossiblyInterruptedRunnable extends CheckedRunnable { |
1051 |
protected void realRun() { |
1052 |
try { |
1053 |
delay(LONG_DELAY_MS); |
1054 |
} catch (InterruptedException ok) {} |
1055 |
} |
1056 |
} |
1057 |
|
1058 |
/** |
1059 |
* For use as ThreadFactory in constructors |
1060 |
*/ |
1061 |
public static class SimpleThreadFactory implements ThreadFactory { |
1062 |
public Thread newThread(Runnable r) { |
1063 |
return new Thread(r); |
1064 |
} |
1065 |
} |
1066 |
|
1067 |
public interface TrackedRunnable extends Runnable { |
1068 |
boolean isDone(); |
1069 |
} |
1070 |
|
1071 |
public static TrackedRunnable trackedRunnable(final long timeoutMillis) { |
1072 |
return new TrackedRunnable() { |
1073 |
private volatile boolean done = false; |
1074 |
public boolean isDone() { return done; } |
1075 |
public void run() { |
1076 |
try { |
1077 |
delay(timeoutMillis); |
1078 |
done = true; |
1079 |
} catch (InterruptedException ok) {} |
1080 |
} |
1081 |
}; |
1082 |
} |
1083 |
|
1084 |
public static class TrackedShortRunnable implements Runnable { |
1085 |
public volatile boolean done = false; |
1086 |
public void run() { |
1087 |
try { |
1088 |
delay(SHORT_DELAY_MS); |
1089 |
done = true; |
1090 |
} catch (InterruptedException ok) {} |
1091 |
} |
1092 |
} |
1093 |
|
1094 |
public static class TrackedSmallRunnable implements Runnable { |
1095 |
public volatile boolean done = false; |
1096 |
public void run() { |
1097 |
try { |
1098 |
delay(SMALL_DELAY_MS); |
1099 |
done = true; |
1100 |
} catch (InterruptedException ok) {} |
1101 |
} |
1102 |
} |
1103 |
|
1104 |
public static class TrackedMediumRunnable implements Runnable { |
1105 |
public volatile boolean done = false; |
1106 |
public void run() { |
1107 |
try { |
1108 |
delay(MEDIUM_DELAY_MS); |
1109 |
done = true; |
1110 |
} catch (InterruptedException ok) {} |
1111 |
} |
1112 |
} |
1113 |
|
1114 |
public static class TrackedLongRunnable implements Runnable { |
1115 |
public volatile boolean done = false; |
1116 |
public void run() { |
1117 |
try { |
1118 |
delay(LONG_DELAY_MS); |
1119 |
done = true; |
1120 |
} catch (InterruptedException ok) {} |
1121 |
} |
1122 |
} |
1123 |
|
1124 |
public static class TrackedNoOpRunnable implements Runnable { |
1125 |
public volatile boolean done = false; |
1126 |
public void run() { |
1127 |
done = true; |
1128 |
} |
1129 |
} |
1130 |
|
1131 |
public static class TrackedCallable implements Callable { |
1132 |
public volatile boolean done = false; |
1133 |
public Object call() { |
1134 |
try { |
1135 |
delay(SMALL_DELAY_MS); |
1136 |
done = true; |
1137 |
} catch (InterruptedException ok) {} |
1138 |
return Boolean.TRUE; |
1139 |
} |
1140 |
} |
1141 |
|
1142 |
/** |
1143 |
* Analog of CheckedRunnable for RecursiveAction |
1144 |
*/ |
1145 |
public abstract class CheckedRecursiveAction extends RecursiveAction { |
1146 |
protected abstract void realCompute() throws Throwable; |
1147 |
|
1148 |
public final void compute() { |
1149 |
try { |
1150 |
realCompute(); |
1151 |
} catch (Throwable t) { |
1152 |
threadUnexpectedException(t); |
1153 |
} |
1154 |
} |
1155 |
} |
1156 |
|
1157 |
/** |
1158 |
* Analog of CheckedCallable for RecursiveTask |
1159 |
*/ |
1160 |
public abstract class CheckedRecursiveTask<T> extends RecursiveTask<T> { |
1161 |
protected abstract T realCompute() throws Throwable; |
1162 |
|
1163 |
public final T compute() { |
1164 |
try { |
1165 |
return realCompute(); |
1166 |
} catch (Throwable t) { |
1167 |
threadUnexpectedException(t); |
1168 |
return null; |
1169 |
} |
1170 |
} |
1171 |
} |
1172 |
|
1173 |
/** |
1174 |
* For use as RejectedExecutionHandler in constructors |
1175 |
*/ |
1176 |
public static class NoOpREHandler implements RejectedExecutionHandler { |
1177 |
public void rejectedExecution(Runnable r, |
1178 |
ThreadPoolExecutor executor) {} |
1179 |
} |
1180 |
|
1181 |
/** |
1182 |
* A CyclicBarrier that uses timed await and fails with |
1183 |
* AssertionFailedErrors instead of throwing checked exceptions. |
1184 |
*/ |
1185 |
public class CheckedBarrier extends CyclicBarrier { |
1186 |
public CheckedBarrier(int parties) { super(parties); } |
1187 |
|
1188 |
public int await() { |
1189 |
try { |
1190 |
return super.await(2 * LONG_DELAY_MS, MILLISECONDS); |
1191 |
} catch (TimeoutException e) { |
1192 |
throw new AssertionFailedError("timed out"); |
1193 |
} catch (Exception e) { |
1194 |
AssertionFailedError afe = |
1195 |
new AssertionFailedError("Unexpected exception: " + e); |
1196 |
afe.initCause(e); |
1197 |
throw afe; |
1198 |
} |
1199 |
} |
1200 |
} |
1201 |
|
1202 |
void checkEmpty(BlockingQueue q) { |
1203 |
try { |
1204 |
assertTrue(q.isEmpty()); |
1205 |
assertEquals(0, q.size()); |
1206 |
assertNull(q.peek()); |
1207 |
assertNull(q.poll()); |
1208 |
assertNull(q.poll(0, MILLISECONDS)); |
1209 |
assertEquals(q.toString(), "[]"); |
1210 |
assertTrue(Arrays.equals(q.toArray(), new Object[0])); |
1211 |
assertFalse(q.iterator().hasNext()); |
1212 |
try { |
1213 |
q.element(); |
1214 |
shouldThrow(); |
1215 |
} catch (NoSuchElementException success) {} |
1216 |
try { |
1217 |
q.iterator().next(); |
1218 |
shouldThrow(); |
1219 |
} catch (NoSuchElementException success) {} |
1220 |
try { |
1221 |
q.remove(); |
1222 |
shouldThrow(); |
1223 |
} catch (NoSuchElementException success) {} |
1224 |
} catch (InterruptedException ie) { |
1225 |
threadUnexpectedException(ie); |
1226 |
} |
1227 |
} |
1228 |
|
1229 |
void assertSerialEquals(Object x, Object y) { |
1230 |
assertTrue(Arrays.equals(serialBytes(x), serialBytes(y))); |
1231 |
} |
1232 |
|
1233 |
void assertNotSerialEquals(Object x, Object y) { |
1234 |
assertFalse(Arrays.equals(serialBytes(x), serialBytes(y))); |
1235 |
} |
1236 |
|
1237 |
byte[] serialBytes(Object o) { |
1238 |
try { |
1239 |
ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
1240 |
ObjectOutputStream oos = new ObjectOutputStream(bos); |
1241 |
oos.writeObject(o); |
1242 |
oos.flush(); |
1243 |
oos.close(); |
1244 |
return bos.toByteArray(); |
1245 |
} catch (Throwable t) { |
1246 |
threadUnexpectedException(t); |
1247 |
return new byte[0]; |
1248 |
} |
1249 |
} |
1250 |
|
1251 |
@SuppressWarnings("unchecked") |
1252 |
<T> T serialClone(T o) { |
1253 |
try { |
1254 |
ObjectInputStream ois = new ObjectInputStream |
1255 |
(new ByteArrayInputStream(serialBytes(o))); |
1256 |
T clone = (T) ois.readObject(); |
1257 |
assertSame(o.getClass(), clone.getClass()); |
1258 |
return clone; |
1259 |
} catch (Throwable t) { |
1260 |
threadUnexpectedException(t); |
1261 |
return null; |
1262 |
} |
1263 |
} |
1264 |
} |