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import static java.util.concurrent.TimeUnit.HOURS; |
9 |
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import static java.util.concurrent.TimeUnit.MILLISECONDS; |
10 |
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|
11 |
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import java.util.ArrayDeque; |
12 |
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import java.util.ArrayList; |
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import java.util.Arrays; |
14 |
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import java.util.Collection; |
15 |
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import java.util.Collections; |
16 |
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import java.util.ConcurrentModificationException; |
17 |
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import java.util.Deque; |
18 |
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import java.util.HashSet; |
19 |
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import java.util.Iterator; |
20 |
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import java.util.List; |
21 |
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import java.util.NoSuchElementException; |
22 |
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import java.util.Queue; |
23 |
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import java.util.Set; |
24 |
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import java.util.Spliterator; |
25 |
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import java.util.concurrent.BlockingDeque; |
26 |
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import java.util.concurrent.BlockingQueue; |
61 |
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|
62 |
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Object bomb() { |
63 |
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return new Object() { |
64 |
< |
public boolean equals(Object x) { throw new AssertionError(); } |
65 |
< |
public int hashCode() { throw new AssertionError(); } |
66 |
< |
}; |
64 |
> |
@Override public boolean equals(Object x) { throw new AssertionError(); } |
65 |
> |
@Override public int hashCode() { throw new AssertionError(); } |
66 |
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@Override public String toString() { throw new AssertionError(); } |
67 |
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}; |
68 |
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} |
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/** Checks properties of empty collections. */ |
93 |
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|
94 |
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void emptyMeansEmpty(Collection c) throws InterruptedException { |
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assertTrue(c.isEmpty()); |
96 |
< |
assertEquals(0, c.size()); |
97 |
< |
assertEquals("[]", c.toString()); |
96 |
> |
mustEqual(0, c.size()); |
97 |
> |
mustEqual("[]", c.toString()); |
98 |
> |
if (c instanceof List<?>) { |
99 |
> |
List x = (List) c; |
100 |
> |
mustEqual(1, x.hashCode()); |
101 |
> |
mustEqual(x, Collections.emptyList()); |
102 |
> |
mustEqual(Collections.emptyList(), x); |
103 |
> |
mustEqual(-1, x.indexOf(impl.makeElement(86))); |
104 |
> |
mustEqual(-1, x.lastIndexOf(impl.makeElement(99))); |
105 |
> |
assertThrows( |
106 |
> |
IndexOutOfBoundsException.class, |
107 |
> |
() -> x.get(0), |
108 |
> |
() -> x.set(0, impl.makeElement(42))); |
109 |
> |
} |
110 |
> |
else if (c instanceof Set<?>) { |
111 |
> |
mustEqual(0, c.hashCode()); |
112 |
> |
mustEqual(c, Collections.emptySet()); |
113 |
> |
mustEqual(Collections.emptySet(), c); |
114 |
> |
} |
115 |
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{ |
116 |
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Object[] a = c.toArray(); |
117 |
< |
assertEquals(0, a.length); |
117 |
> |
mustEqual(0, a.length); |
118 |
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assertSame(Object[].class, a.getClass()); |
119 |
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} |
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{ |
122 |
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assertSame(a, c.toArray(a)); |
123 |
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} |
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{ |
125 |
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Integer[] a = new Integer[0]; |
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Item[] a = new Item[0]; |
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assertSame(a, c.toArray(a)); |
127 |
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} |
128 |
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{ |
129 |
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Integer[] a = { 1, 2, 3}; |
129 |
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Item[] a = { one, two, three}; |
130 |
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assertSame(a, c.toArray(a)); |
131 |
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assertNull(a[0]); |
132 |
< |
assertSame(2, a[1]); |
133 |
< |
assertSame(3, a[2]); |
132 |
> |
mustEqual(2, a[1]); |
133 |
> |
mustEqual(3, a[2]); |
134 |
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} |
135 |
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assertIteratorExhausted(c.iterator()); |
136 |
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Consumer alwaysThrows = e -> { throw new AssertionError(); }; |
139 |
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c.spliterator().forEachRemaining(alwaysThrows); |
140 |
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assertFalse(c.spliterator().tryAdvance(alwaysThrows)); |
141 |
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if (c.spliterator().hasCharacteristics(Spliterator.SIZED)) |
142 |
< |
assertEquals(0, c.spliterator().estimateSize()); |
142 |
> |
mustEqual(0, c.spliterator().estimateSize()); |
143 |
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assertFalse(c.contains(bomb())); |
144 |
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assertFalse(c.remove(bomb())); |
145 |
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if (c instanceof Queue) { |
160 |
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} |
161 |
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if (c instanceof BlockingQueue) { |
162 |
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BlockingQueue q = (BlockingQueue) c; |
163 |
< |
assertNull(q.poll(0L, MILLISECONDS)); |
163 |
> |
assertNull(q.poll(randomExpiredTimeout(), randomTimeUnit())); |
164 |
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} |
165 |
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if (c instanceof BlockingDeque) { |
166 |
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BlockingDeque q = (BlockingDeque) c; |
167 |
< |
assertNull(q.pollFirst(0L, MILLISECONDS)); |
168 |
< |
assertNull(q.pollLast(0L, MILLISECONDS)); |
167 |
> |
assertNull(q.pollFirst(randomExpiredTimeout(), randomTimeUnit())); |
168 |
> |
assertNull(q.pollLast(randomExpiredTimeout(), randomTimeUnit())); |
169 |
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} |
170 |
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} |
171 |
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|
172 |
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public void testNullPointerExceptions() throws InterruptedException { |
173 |
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Collection c = impl.emptyCollection(); |
174 |
+ |
Collection nullCollection = null; |
175 |
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assertThrows( |
176 |
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NullPointerException.class, |
177 |
< |
() -> c.addAll(null), |
178 |
< |
() -> c.containsAll(null), |
179 |
< |
() -> c.retainAll(null), |
180 |
< |
() -> c.removeAll(null), |
177 |
> |
() -> c.addAll(nullCollection), |
178 |
> |
() -> c.containsAll(nullCollection), |
179 |
> |
() -> c.retainAll(nullCollection), |
180 |
> |
() -> c.removeAll(nullCollection), |
181 |
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() -> c.removeIf(null), |
182 |
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() -> c.forEach(null), |
183 |
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() -> c.iterator().forEachRemaining(null), |
184 |
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() -> c.spliterator().forEachRemaining(null), |
185 |
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() -> c.spliterator().tryAdvance(null), |
186 |
< |
() -> c.toArray(null)); |
186 |
> |
() -> c.toArray((Object[])null)); |
187 |
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|
188 |
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if (!impl.permitsNulls()) { |
189 |
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assertThrows( |
211 |
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BlockingQueue q = (BlockingQueue) c; |
212 |
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assertThrows( |
213 |
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NullPointerException.class, |
214 |
< |
() -> { |
215 |
< |
try { q.offer(null, 1L, HOURS); } |
194 |
< |
catch (InterruptedException ex) { |
195 |
< |
throw new AssertionError(ex); |
196 |
< |
}}, |
197 |
< |
() -> { |
198 |
< |
try { q.put(null); } |
199 |
< |
catch (InterruptedException ex) { |
200 |
< |
throw new AssertionError(ex); |
201 |
< |
}}); |
214 |
> |
() -> q.offer(null, 1L, HOURS), |
215 |
> |
() -> q.put(null)); |
216 |
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} |
217 |
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if (c instanceof BlockingDeque) { |
218 |
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BlockingDeque q = (BlockingDeque) c; |
219 |
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assertThrows( |
220 |
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NullPointerException.class, |
221 |
< |
() -> { |
222 |
< |
try { q.offerFirst(null, 1L, HOURS); } |
223 |
< |
catch (InterruptedException ex) { |
224 |
< |
throw new AssertionError(ex); |
211 |
< |
}}, |
212 |
< |
() -> { |
213 |
< |
try { q.offerLast(null, 1L, HOURS); } |
214 |
< |
catch (InterruptedException ex) { |
215 |
< |
throw new AssertionError(ex); |
216 |
< |
}}, |
217 |
< |
() -> { |
218 |
< |
try { q.putFirst(null); } |
219 |
< |
catch (InterruptedException ex) { |
220 |
< |
throw new AssertionError(ex); |
221 |
< |
}}, |
222 |
< |
() -> { |
223 |
< |
try { q.putLast(null); } |
224 |
< |
catch (InterruptedException ex) { |
225 |
< |
throw new AssertionError(ex); |
226 |
< |
}}); |
221 |
> |
() -> q.offerFirst(null, 1L, HOURS), |
222 |
> |
() -> q.offerLast(null, 1L, HOURS), |
223 |
> |
() -> q.putFirst(null), |
224 |
> |
() -> q.putLast(null)); |
225 |
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} |
226 |
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} |
227 |
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|
249 |
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() -> d.pop(), |
250 |
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() -> d.descendingIterator().next()); |
251 |
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} |
252 |
+ |
if (c instanceof List) { |
253 |
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List x = (List) c; |
254 |
+ |
assertThrows( |
255 |
+ |
NoSuchElementException.class, |
256 |
+ |
() -> x.iterator().next(), |
257 |
+ |
() -> x.listIterator().next(), |
258 |
+ |
() -> x.listIterator(0).next(), |
259 |
+ |
() -> x.listIterator().previous(), |
260 |
+ |
() -> x.listIterator(0).previous()); |
261 |
+ |
} |
262 |
|
} |
263 |
|
|
264 |
|
public void testRemoveIf() { |
293 |
|
try { |
294 |
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boolean modified = c.removeIf(randomPredicate); |
295 |
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assertNull(threwAt.get()); |
296 |
< |
assertEquals(modified, accepts.size() > 0); |
297 |
< |
assertEquals(modified, rejects.size() != n); |
298 |
< |
assertEquals(accepts.size() + rejects.size(), n); |
296 |
> |
mustEqual(modified, accepts.size() > 0); |
297 |
> |
mustEqual(modified, rejects.size() != n); |
298 |
> |
mustEqual(accepts.size() + rejects.size(), n); |
299 |
|
if (ordered) { |
300 |
< |
assertEquals(rejects, |
300 |
> |
mustEqual(rejects, |
301 |
|
Arrays.asList(c.toArray())); |
302 |
|
} else { |
303 |
< |
assertEquals(new HashSet(rejects), |
303 |
> |
mustEqual(new HashSet(rejects), |
304 |
|
new HashSet(Arrays.asList(c.toArray()))); |
305 |
|
} |
306 |
|
} catch (ArithmeticException ok) { |
324 |
|
assertTrue(c.containsAll(survivors)); |
325 |
|
assertTrue(survivors.containsAll(rejects)); |
326 |
|
if (threwAt.get() == null) { |
327 |
< |
assertEquals(n - accepts.size(), c.size()); |
327 |
> |
mustEqual(n - accepts.size(), c.size()); |
328 |
|
for (Object x : accepts) assertFalse(c.contains(x)); |
329 |
|
} else { |
330 |
|
// Two acceptable behaviors: entire removeIf call is one |
350 |
|
} |
351 |
|
|
352 |
|
/** |
353 |
+ |
* All elements removed in the middle of CONCURRENT traversal. |
354 |
+ |
*/ |
355 |
+ |
public void testElementRemovalDuringTraversal() { |
356 |
+ |
Collection c = impl.emptyCollection(); |
357 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
358 |
+ |
int n = rnd.nextInt(6); |
359 |
+ |
ArrayList copy = new ArrayList(); |
360 |
+ |
for (int i = 0; i < n; i++) { |
361 |
+ |
Object x = impl.makeElement(i); |
362 |
+ |
copy.add(x); |
363 |
+ |
c.add(x); |
364 |
+ |
} |
365 |
+ |
ArrayList iterated = new ArrayList(); |
366 |
+ |
ArrayList spliterated = new ArrayList(); |
367 |
+ |
Spliterator s = c.spliterator(); |
368 |
+ |
Iterator it = c.iterator(); |
369 |
+ |
for (int i = rnd.nextInt(n + 1); --i >= 0; ) { |
370 |
+ |
assertTrue(s.tryAdvance(spliterated::add)); |
371 |
+ |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
372 |
+ |
iterated.add(it.next()); |
373 |
+ |
} |
374 |
+ |
Consumer alwaysThrows = e -> { throw new AssertionError(); }; |
375 |
+ |
if (s.hasCharacteristics(Spliterator.CONCURRENT)) { |
376 |
+ |
c.clear(); // TODO: many more removal methods |
377 |
+ |
if (testImplementationDetails |
378 |
+ |
&& !(c instanceof java.util.concurrent.ArrayBlockingQueue)) { |
379 |
+ |
if (rnd.nextBoolean()) |
380 |
+ |
assertFalse(s.tryAdvance(alwaysThrows)); |
381 |
+ |
else |
382 |
+ |
s.forEachRemaining(alwaysThrows); |
383 |
+ |
} |
384 |
+ |
if (it.hasNext()) iterated.add(it.next()); |
385 |
+ |
if (rnd.nextBoolean()) assertIteratorExhausted(it); |
386 |
+ |
} |
387 |
+ |
assertTrue(copy.containsAll(iterated)); |
388 |
+ |
assertTrue(copy.containsAll(spliterated)); |
389 |
+ |
} |
390 |
+ |
|
391 |
+ |
/** |
392 |
+ |
* Some elements randomly disappear in the middle of traversal. |
393 |
+ |
*/ |
394 |
+ |
public void testRandomElementRemovalDuringTraversal() { |
395 |
+ |
Collection c = impl.emptyCollection(); |
396 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
397 |
+ |
int n = rnd.nextInt(6); |
398 |
+ |
ArrayList copy = new ArrayList(); |
399 |
+ |
for (int i = 0; i < n; i++) { |
400 |
+ |
Object x = impl.makeElement(i); |
401 |
+ |
copy.add(x); |
402 |
+ |
c.add(x); |
403 |
+ |
} |
404 |
+ |
ArrayList iterated = new ArrayList(); |
405 |
+ |
ArrayList spliterated = new ArrayList(); |
406 |
+ |
ArrayList removed = new ArrayList(); |
407 |
+ |
Spliterator s = c.spliterator(); |
408 |
+ |
Iterator it = c.iterator(); |
409 |
+ |
if (! (s.hasCharacteristics(Spliterator.CONCURRENT) || |
410 |
+ |
s.hasCharacteristics(Spliterator.IMMUTABLE))) |
411 |
+ |
return; |
412 |
+ |
for (int i = rnd.nextInt(n + 1); --i >= 0; ) { |
413 |
+ |
assertTrue(s.tryAdvance(e -> {})); |
414 |
+ |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
415 |
+ |
it.next(); |
416 |
+ |
} |
417 |
+ |
// TODO: many more removal methods |
418 |
+ |
if (rnd.nextBoolean()) { |
419 |
+ |
for (Iterator z = c.iterator(); z.hasNext(); ) { |
420 |
+ |
Object e = z.next(); |
421 |
+ |
if (rnd.nextBoolean()) { |
422 |
+ |
try { |
423 |
+ |
z.remove(); |
424 |
+ |
} catch (UnsupportedOperationException ok) { return; } |
425 |
+ |
removed.add(e); |
426 |
+ |
} |
427 |
+ |
} |
428 |
+ |
} else { |
429 |
+ |
Predicate randomlyRemove = e -> { |
430 |
+ |
if (rnd.nextBoolean()) { removed.add(e); return true; } |
431 |
+ |
else return false; |
432 |
+ |
}; |
433 |
+ |
c.removeIf(randomlyRemove); |
434 |
+ |
} |
435 |
+ |
s.forEachRemaining(spliterated::add); |
436 |
+ |
while (it.hasNext()) |
437 |
+ |
iterated.add(it.next()); |
438 |
+ |
assertTrue(copy.containsAll(iterated)); |
439 |
+ |
assertTrue(copy.containsAll(spliterated)); |
440 |
+ |
assertTrue(copy.containsAll(removed)); |
441 |
+ |
if (s.hasCharacteristics(Spliterator.CONCURRENT)) { |
442 |
+ |
ArrayList iteratedAndRemoved = new ArrayList(iterated); |
443 |
+ |
ArrayList spliteratedAndRemoved = new ArrayList(spliterated); |
444 |
+ |
iteratedAndRemoved.retainAll(removed); |
445 |
+ |
spliteratedAndRemoved.retainAll(removed); |
446 |
+ |
assertTrue(iteratedAndRemoved.size() <= 1); |
447 |
+ |
assertTrue(spliteratedAndRemoved.size() <= 1); |
448 |
+ |
if (testImplementationDetails |
449 |
+ |
&& !(c instanceof java.util.concurrent.ArrayBlockingQueue)) |
450 |
+ |
assertTrue(spliteratedAndRemoved.isEmpty()); |
451 |
+ |
} |
452 |
+ |
} |
453 |
+ |
|
454 |
+ |
/** |
455 |
|
* Various ways of traversing a collection yield same elements |
456 |
|
*/ |
457 |
< |
public void testIteratorEquivalence() { |
457 |
> |
public void testTraversalEquivalence() { |
458 |
|
Collection c = impl.emptyCollection(); |
459 |
|
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
460 |
|
int n = rnd.nextInt(6); |
487 |
|
if (c instanceof List || c instanceof Deque) |
488 |
|
assertTrue(ordered); |
489 |
|
HashSet cset = new HashSet(c); |
490 |
< |
assertEquals(cset, new HashSet(parallelStreamForEached)); |
490 |
> |
mustEqual(cset, new HashSet(parallelStreamForEached)); |
491 |
|
if (ordered) { |
492 |
< |
assertEquals(iterated, iteratedForEachRemaining); |
493 |
< |
assertEquals(iterated, tryAdvanced); |
494 |
< |
assertEquals(iterated, spliterated); |
495 |
< |
assertEquals(iterated, splitonced); |
496 |
< |
assertEquals(iterated, forEached); |
497 |
< |
assertEquals(iterated, streamForEached); |
498 |
< |
assertEquals(iterated, removeIfed); |
492 |
> |
mustEqual(iterated, iteratedForEachRemaining); |
493 |
> |
mustEqual(iterated, tryAdvanced); |
494 |
> |
mustEqual(iterated, spliterated); |
495 |
> |
mustEqual(iterated, splitonced); |
496 |
> |
mustEqual(iterated, forEached); |
497 |
> |
mustEqual(iterated, streamForEached); |
498 |
> |
mustEqual(iterated, removeIfed); |
499 |
|
} else { |
500 |
< |
assertEquals(cset, new HashSet(iterated)); |
501 |
< |
assertEquals(cset, new HashSet(iteratedForEachRemaining)); |
502 |
< |
assertEquals(cset, new HashSet(tryAdvanced)); |
503 |
< |
assertEquals(cset, new HashSet(spliterated)); |
504 |
< |
assertEquals(cset, new HashSet(splitonced)); |
505 |
< |
assertEquals(cset, new HashSet(forEached)); |
506 |
< |
assertEquals(cset, new HashSet(streamForEached)); |
507 |
< |
assertEquals(cset, new HashSet(removeIfed)); |
500 |
> |
mustEqual(cset, new HashSet(iterated)); |
501 |
> |
mustEqual(cset, new HashSet(iteratedForEachRemaining)); |
502 |
> |
mustEqual(cset, new HashSet(tryAdvanced)); |
503 |
> |
mustEqual(cset, new HashSet(spliterated)); |
504 |
> |
mustEqual(cset, new HashSet(splitonced)); |
505 |
> |
mustEqual(cset, new HashSet(forEached)); |
506 |
> |
mustEqual(cset, new HashSet(streamForEached)); |
507 |
> |
mustEqual(cset, new HashSet(removeIfed)); |
508 |
|
} |
509 |
|
if (c instanceof Deque) { |
510 |
|
Deque d = (Deque) c; |
516 |
|
e -> descendingForEachRemaining.add(e)); |
517 |
|
Collections.reverse(descending); |
518 |
|
Collections.reverse(descendingForEachRemaining); |
519 |
< |
assertEquals(iterated, descending); |
520 |
< |
assertEquals(iterated, descendingForEachRemaining); |
519 |
> |
mustEqual(iterated, descending); |
520 |
> |
mustEqual(iterated, descendingForEachRemaining); |
521 |
|
} |
522 |
|
} |
523 |
|
|
524 |
|
/** |
525 |
+ |
* Iterator.forEachRemaining has same behavior as Iterator's |
526 |
+ |
* default implementation. |
527 |
+ |
*/ |
528 |
+ |
public void testForEachRemainingConsistentWithDefaultImplementation() { |
529 |
+ |
Collection c = impl.emptyCollection(); |
530 |
+ |
if (!testImplementationDetails |
531 |
+ |
|| c.getClass() == java.util.LinkedList.class) |
532 |
+ |
return; |
533 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
534 |
+ |
int n = 1 + rnd.nextInt(3); |
535 |
+ |
for (int i = 0; i < n; i++) c.add(impl.makeElement(i)); |
536 |
+ |
ArrayList iterated = new ArrayList(); |
537 |
+ |
ArrayList iteratedForEachRemaining = new ArrayList(); |
538 |
+ |
Iterator it1 = c.iterator(); |
539 |
+ |
Iterator it2 = c.iterator(); |
540 |
+ |
assertTrue(it1.hasNext()); |
541 |
+ |
assertTrue(it2.hasNext()); |
542 |
+ |
c.clear(); |
543 |
+ |
Object r1, r2; |
544 |
+ |
try { |
545 |
+ |
while (it1.hasNext()) iterated.add(it1.next()); |
546 |
+ |
r1 = iterated; |
547 |
+ |
} catch (ConcurrentModificationException ex) { |
548 |
+ |
r1 = ConcurrentModificationException.class; |
549 |
+ |
assertFalse(impl.isConcurrent()); |
550 |
+ |
} |
551 |
+ |
try { |
552 |
+ |
it2.forEachRemaining(iteratedForEachRemaining::add); |
553 |
+ |
r2 = iteratedForEachRemaining; |
554 |
+ |
} catch (ConcurrentModificationException ex) { |
555 |
+ |
r2 = ConcurrentModificationException.class; |
556 |
+ |
assertFalse(impl.isConcurrent()); |
557 |
+ |
} |
558 |
+ |
mustEqual(r1, r2); |
559 |
+ |
} |
560 |
+ |
|
561 |
+ |
/** |
562 |
|
* Calling Iterator#remove() after Iterator#forEachRemaining |
563 |
|
* should (maybe) remove last element |
564 |
|
*/ |
565 |
|
public void testRemoveAfterForEachRemaining() { |
566 |
|
Collection c = impl.emptyCollection(); |
567 |
|
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
568 |
+ |
ArrayList copy = new ArrayList(); |
569 |
+ |
boolean ordered = c.spliterator().hasCharacteristics(Spliterator.ORDERED); |
570 |
|
testCollection: { |
571 |
|
int n = 3 + rnd.nextInt(2); |
572 |
< |
for (int i = 0; i < n; i++) c.add(impl.makeElement(i)); |
572 |
> |
for (int i = 0; i < n; i++) { |
573 |
> |
Object x = impl.makeElement(i); |
574 |
> |
c.add(x); |
575 |
> |
copy.add(x); |
576 |
> |
} |
577 |
|
Iterator it = c.iterator(); |
578 |
< |
assertTrue(it.hasNext()); |
579 |
< |
assertEquals(impl.makeElement(0), it.next()); |
580 |
< |
assertTrue(it.hasNext()); |
581 |
< |
assertEquals(impl.makeElement(1), it.next()); |
582 |
< |
it.forEachRemaining(e -> assertTrue(c.contains(e))); |
578 |
> |
if (ordered) { |
579 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
580 |
> |
mustEqual(impl.makeElement(0), it.next()); |
581 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
582 |
> |
mustEqual(impl.makeElement(1), it.next()); |
583 |
> |
} else { |
584 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
585 |
> |
assertTrue(copy.contains(it.next())); |
586 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
587 |
> |
assertTrue(copy.contains(it.next())); |
588 |
> |
} |
589 |
> |
if (rnd.nextBoolean()) assertTrue(it.hasNext()); |
590 |
> |
it.forEachRemaining( |
591 |
> |
e -> { |
592 |
> |
assertTrue(c.contains(e)); |
593 |
> |
assertTrue(copy.contains(e));}); |
594 |
|
if (testImplementationDetails) { |
595 |
|
if (c instanceof java.util.concurrent.ArrayBlockingQueue) { |
596 |
|
assertIteratorExhausted(it); |
599 |
|
catch (UnsupportedOperationException ok) { |
600 |
|
break testCollection; |
601 |
|
} |
602 |
< |
assertEquals(n - 1, c.size()); |
603 |
< |
for (int i = 0; i < n - 1; i++) |
604 |
< |
assertTrue(c.contains(impl.makeElement(i))); |
605 |
< |
assertFalse(c.contains(impl.makeElement(n - 1))); |
602 |
> |
mustEqual(n - 1, c.size()); |
603 |
> |
if (ordered) { |
604 |
> |
for (int i = 0; i < n - 1; i++) |
605 |
> |
assertTrue(c.contains(impl.makeElement(i))); |
606 |
> |
assertFalse(c.contains(impl.makeElement(n - 1))); |
607 |
> |
} |
608 |
|
} |
609 |
|
} |
610 |
|
} |
611 |
|
if (c instanceof Deque) { |
612 |
|
Deque d = (Deque) impl.emptyCollection(); |
613 |
+ |
assertTrue(ordered); |
614 |
|
int n = 3 + rnd.nextInt(2); |
615 |
|
for (int i = 0; i < n; i++) d.add(impl.makeElement(i)); |
616 |
|
Iterator it = d.descendingIterator(); |
617 |
|
assertTrue(it.hasNext()); |
618 |
< |
assertEquals(impl.makeElement(n - 1), it.next()); |
618 |
> |
mustEqual(impl.makeElement(n - 1), it.next()); |
619 |
|
assertTrue(it.hasNext()); |
620 |
< |
assertEquals(impl.makeElement(n - 2), it.next()); |
620 |
> |
mustEqual(impl.makeElement(n - 2), it.next()); |
621 |
|
it.forEachRemaining(e -> assertTrue(c.contains(e))); |
622 |
|
if (testImplementationDetails) { |
623 |
|
it.remove(); |
624 |
< |
assertEquals(n - 1, d.size()); |
624 |
> |
mustEqual(n - 1, d.size()); |
625 |
|
for (int i = 1; i < n; i++) |
626 |
|
assertTrue(d.contains(impl.makeElement(i))); |
627 |
|
assertFalse(d.contains(impl.makeElement(0))); |
634 |
|
*/ |
635 |
|
public void testStreamForEach() throws Throwable { |
636 |
|
final Collection c = impl.emptyCollection(); |
470 |
– |
final AtomicLong count = new AtomicLong(0L); |
637 |
|
final Object x = impl.makeElement(1); |
638 |
|
final Object y = impl.makeElement(2); |
639 |
|
final ArrayList found = new ArrayList(); |
643 |
|
|
644 |
|
assertTrue(c.add(x)); |
645 |
|
c.stream().forEach(spy); |
646 |
< |
assertEquals(Collections.singletonList(x), found); |
646 |
> |
mustEqual(Collections.singletonList(x), found); |
647 |
|
found.clear(); |
648 |
|
|
649 |
|
assertTrue(c.add(y)); |
650 |
|
c.stream().forEach(spy); |
651 |
< |
assertEquals(2, found.size()); |
651 |
> |
mustEqual(2, found.size()); |
652 |
|
assertTrue(found.contains(x)); |
653 |
|
assertTrue(found.contains(y)); |
654 |
|
found.clear(); |
691 |
|
*/ |
692 |
|
public void testForEach() throws Throwable { |
693 |
|
final Collection c = impl.emptyCollection(); |
528 |
– |
final AtomicLong count = new AtomicLong(0L); |
694 |
|
final Object x = impl.makeElement(1); |
695 |
|
final Object y = impl.makeElement(2); |
696 |
|
final ArrayList found = new ArrayList(); |
700 |
|
|
701 |
|
assertTrue(c.add(x)); |
702 |
|
c.forEach(spy); |
703 |
< |
assertEquals(Collections.singletonList(x), found); |
703 |
> |
mustEqual(Collections.singletonList(x), found); |
704 |
|
found.clear(); |
705 |
|
|
706 |
|
assertTrue(c.add(y)); |
707 |
|
c.forEach(spy); |
708 |
< |
assertEquals(2, found.size()); |
708 |
> |
mustEqual(2, found.size()); |
709 |
|
assertTrue(found.contains(x)); |
710 |
|
assertTrue(found.contains(y)); |
711 |
|
found.clear(); |
715 |
|
assertTrue(found.isEmpty()); |
716 |
|
} |
717 |
|
|
718 |
+ |
/** TODO: promote to a common utility */ |
719 |
+ |
static <T> T chooseOne(T ... ts) { |
720 |
+ |
return ts[ThreadLocalRandom.current().nextInt(ts.length)]; |
721 |
+ |
} |
722 |
+ |
|
723 |
+ |
/** TODO: more random adders and removers */ |
724 |
+ |
static <E> Runnable adderRemover(Collection<E> c, E e) { |
725 |
+ |
return chooseOne( |
726 |
+ |
() -> { |
727 |
+ |
assertTrue(c.add(e)); |
728 |
+ |
assertTrue(c.contains(e)); |
729 |
+ |
assertTrue(c.remove(e)); |
730 |
+ |
assertFalse(c.contains(e)); |
731 |
+ |
}, |
732 |
+ |
() -> { |
733 |
+ |
assertTrue(c.add(e)); |
734 |
+ |
assertTrue(c.contains(e)); |
735 |
+ |
assertTrue(c.removeIf(x -> x == e)); |
736 |
+ |
assertFalse(c.contains(e)); |
737 |
+ |
}, |
738 |
+ |
() -> { |
739 |
+ |
assertTrue(c.add(e)); |
740 |
+ |
assertTrue(c.contains(e)); |
741 |
+ |
for (Iterator it = c.iterator();; ) |
742 |
+ |
if (it.next() == e) { |
743 |
+ |
try { it.remove(); } |
744 |
+ |
catch (UnsupportedOperationException ok) { |
745 |
+ |
c.remove(e); |
746 |
+ |
} |
747 |
+ |
break; |
748 |
+ |
} |
749 |
+ |
assertFalse(c.contains(e)); |
750 |
+ |
}); |
751 |
+ |
} |
752 |
+ |
|
753 |
+ |
/** |
754 |
+ |
* Concurrent Spliterators, once exhausted, stay exhausted. |
755 |
+ |
*/ |
756 |
+ |
public void testStickySpliteratorExhaustion() throws Throwable { |
757 |
+ |
if (!impl.isConcurrent()) return; |
758 |
+ |
if (!testImplementationDetails) return; |
759 |
+ |
final ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
760 |
+ |
final Consumer alwaysThrows = e -> { throw new AssertionError(); }; |
761 |
+ |
final Collection c = impl.emptyCollection(); |
762 |
+ |
final Spliterator s = c.spliterator(); |
763 |
+ |
if (rnd.nextBoolean()) { |
764 |
+ |
assertFalse(s.tryAdvance(alwaysThrows)); |
765 |
+ |
} else { |
766 |
+ |
s.forEachRemaining(alwaysThrows); |
767 |
+ |
} |
768 |
+ |
final Object one = impl.makeElement(1); |
769 |
+ |
// Spliterator should not notice added element |
770 |
+ |
c.add(one); |
771 |
+ |
if (rnd.nextBoolean()) { |
772 |
+ |
assertFalse(s.tryAdvance(alwaysThrows)); |
773 |
+ |
} else { |
774 |
+ |
s.forEachRemaining(alwaysThrows); |
775 |
+ |
} |
776 |
+ |
} |
777 |
+ |
|
778 |
|
/** |
779 |
|
* Motley crew of threads concurrently randomly hammer the collection. |
780 |
|
*/ |
814 |
|
() -> checkArraySanity.accept(c.toArray()), |
815 |
|
() -> checkArraySanity.accept(c.toArray(emptyArray)), |
816 |
|
() -> { |
817 |
< |
assertTrue(c.add(one)); |
818 |
< |
assertTrue(c.contains(one)); |
819 |
< |
assertTrue(c.remove(one)); |
820 |
< |
assertFalse(c.contains(one)); |
821 |
< |
}, |
822 |
< |
() -> { |
823 |
< |
assertTrue(c.add(two)); |
824 |
< |
assertTrue(c.contains(two)); |
825 |
< |
assertTrue(c.remove(two)); |
826 |
< |
assertFalse(c.contains(two)); |
827 |
< |
}, |
817 |
> |
Object[] a = new Object[5]; |
818 |
> |
Object three = impl.makeElement(3); |
819 |
> |
Arrays.fill(a, 0, a.length, three); |
820 |
> |
Object[] x = c.toArray(a); |
821 |
> |
if (x == a) |
822 |
> |
for (int i = 0; i < a.length && a[i] != null; i++) |
823 |
> |
checkSanity.accept(a[i]); |
824 |
> |
// A careful reading of the spec does not support: |
825 |
> |
// for (i++; i < a.length; i++) assertSame(three, a[i]); |
826 |
> |
else |
827 |
> |
checkArraySanity.accept(x); |
828 |
> |
}, |
829 |
> |
adderRemover(c, one), |
830 |
> |
adderRemover(c, two), |
831 |
|
}; |
832 |
|
final List<Runnable> tasks = |
833 |
|
Arrays.stream(frobbers) |
879 |
|
c.add(one); |
880 |
|
split.forEachRemaining( |
881 |
|
e -> { assertSame(e, one); count.getAndIncrement(); }); |
882 |
< |
assertEquals(1L, count.get()); |
882 |
> |
mustEqual(1L, count.get()); |
883 |
|
assertFalse(split.tryAdvance(e -> { throw new AssertionError(); })); |
884 |
|
assertTrue(c.contains(one)); |
885 |
|
} |
886 |
|
} |
887 |
|
|
888 |
+ |
/** |
889 |
+ |
* Spliterator.getComparator throws IllegalStateException iff the |
890 |
+ |
* spliterator does not report SORTED. |
891 |
+ |
*/ |
892 |
+ |
public void testGetComparator_IllegalStateException() { |
893 |
+ |
Collection c = impl.emptyCollection(); |
894 |
+ |
Spliterator s = c.spliterator(); |
895 |
+ |
boolean reportsSorted = s.hasCharacteristics(Spliterator.SORTED); |
896 |
+ |
try { |
897 |
+ |
s.getComparator(); |
898 |
+ |
assertTrue(reportsSorted); |
899 |
+ |
} catch (IllegalStateException ex) { |
900 |
+ |
assertFalse(reportsSorted); |
901 |
+ |
} |
902 |
+ |
} |
903 |
+ |
|
904 |
+ |
public void testCollectionCopies() throws Exception { |
905 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
906 |
+ |
Collection c = impl.emptyCollection(); |
907 |
+ |
for (int n = rnd.nextInt(4); n--> 0; ) |
908 |
+ |
c.add(impl.makeElement(rnd.nextInt())); |
909 |
+ |
mustEqual(c, c); |
910 |
+ |
if (c instanceof List) |
911 |
+ |
assertCollectionsEquals(c, new ArrayList(c)); |
912 |
+ |
else if (c instanceof Set) |
913 |
+ |
assertCollectionsEquals(c, new HashSet(c)); |
914 |
+ |
else if (c instanceof Deque) |
915 |
+ |
assertCollectionsEquivalent(c, new ArrayDeque(c)); |
916 |
+ |
|
917 |
+ |
Collection clone = cloneableClone(c); |
918 |
+ |
if (clone != null) { |
919 |
+ |
assertSame(c.getClass(), clone.getClass()); |
920 |
+ |
assertCollectionsEquivalent(c, clone); |
921 |
+ |
} |
922 |
+ |
try { |
923 |
+ |
Collection serialClone = serialClonePossiblyFailing(c); |
924 |
+ |
assertSame(c.getClass(), serialClone.getClass()); |
925 |
+ |
assertCollectionsEquivalent(c, serialClone); |
926 |
+ |
} catch (java.io.NotSerializableException acceptable) {} |
927 |
+ |
} |
928 |
+ |
|
929 |
+ |
/** |
930 |
+ |
* TODO: move out of limbo |
931 |
+ |
* 8203662: remove increment of modCount from ArrayList and Vector replaceAll() |
932 |
+ |
*/ |
933 |
+ |
public void DISABLED_testReplaceAllIsNotStructuralModification() { |
934 |
+ |
Collection c = impl.emptyCollection(); |
935 |
+ |
if (!(c instanceof List)) |
936 |
+ |
return; |
937 |
+ |
List list = (List) c; |
938 |
+ |
ThreadLocalRandom rnd = ThreadLocalRandom.current(); |
939 |
+ |
for (int n = rnd.nextInt(2, 10); n--> 0; ) |
940 |
+ |
list.add(impl.makeElement(rnd.nextInt())); |
941 |
+ |
ArrayList copy = new ArrayList(list); |
942 |
+ |
int size = list.size(), half = size / 2; |
943 |
+ |
Iterator it = list.iterator(); |
944 |
+ |
for (int i = 0; i < half; i++) |
945 |
+ |
mustEqual(it.next(), copy.get(i)); |
946 |
+ |
list.replaceAll(n -> n); |
947 |
+ |
// ConcurrentModificationException must not be thrown here. |
948 |
+ |
for (int i = half; i < size; i++) |
949 |
+ |
mustEqual(it.next(), copy.get(i)); |
950 |
+ |
} |
951 |
+ |
|
952 |
|
// public void testCollection8DebugFail() { |
953 |
|
// fail(impl.klazz().getSimpleName()); |
954 |
|
// } |