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.util.*; |
11 |
import java.util.concurrent.ConcurrentHashMap; |
12 |
|
13 |
public class ConcurrentHashMapTest extends JSR166TestCase { |
14 |
public static void main(String[] args) { |
15 |
junit.textui.TestRunner.run(suite()); |
16 |
} |
17 |
public static Test suite() { |
18 |
return new TestSuite(ConcurrentHashMapTest.class); |
19 |
} |
20 |
|
21 |
/** |
22 |
* Returns a new map from Integers 1-5 to Strings "A"-"E". |
23 |
*/ |
24 |
private static ConcurrentHashMap<Integer, String> map5() { |
25 |
ConcurrentHashMap map = new ConcurrentHashMap<Integer, String>(5); |
26 |
assertTrue(map.isEmpty()); |
27 |
map.put(one, "A"); |
28 |
map.put(two, "B"); |
29 |
map.put(three, "C"); |
30 |
map.put(four, "D"); |
31 |
map.put(five, "E"); |
32 |
assertFalse(map.isEmpty()); |
33 |
assertEquals(5, map.size()); |
34 |
return map; |
35 |
} |
36 |
|
37 |
/** Re-implement Integer.compare for old java versions */ |
38 |
static int compare(int x, int y) { return x < y ? -1 : x > y ? 1 : 0; } |
39 |
|
40 |
// classes for testing Comparable fallbacks |
41 |
static class BI implements Comparable<BI> { |
42 |
private final int value; |
43 |
BI(int value) { this.value = value; } |
44 |
public int compareTo(BI other) { |
45 |
return compare(value, other.value); |
46 |
} |
47 |
public boolean equals(Object x) { |
48 |
return (x instanceof BI) && ((BI)x).value == value; |
49 |
} |
50 |
public int hashCode() { return 42; } |
51 |
} |
52 |
static class CI extends BI { CI(int value) { super(value); } } |
53 |
static class DI extends BI { DI(int value) { super(value); } } |
54 |
|
55 |
static class BS implements Comparable<BS> { |
56 |
private final String value; |
57 |
BS(String value) { this.value = value; } |
58 |
public int compareTo(BS other) { |
59 |
return value.compareTo(other.value); |
60 |
} |
61 |
public boolean equals(Object x) { |
62 |
return (x instanceof BS) && value.equals(((BS)x).value); |
63 |
} |
64 |
public int hashCode() { return 42; } |
65 |
} |
66 |
|
67 |
static class LexicographicList<E extends Comparable<E>> extends ArrayList<E> |
68 |
implements Comparable<LexicographicList<E>> { |
69 |
LexicographicList(Collection<E> c) { super(c); } |
70 |
LexicographicList(E e) { super(Collections.singleton(e)); } |
71 |
public int compareTo(LexicographicList<E> other) { |
72 |
int common = Math.min(size(), other.size()); |
73 |
int r = 0; |
74 |
for (int i = 0; i < common; i++) { |
75 |
if ((r = get(i).compareTo(other.get(i))) != 0) |
76 |
break; |
77 |
} |
78 |
if (r == 0) |
79 |
r = compare(size(), other.size()); |
80 |
return r; |
81 |
} |
82 |
private static final long serialVersionUID = 0; |
83 |
} |
84 |
|
85 |
static class CollidingObject { |
86 |
final String value; |
87 |
CollidingObject(final String value) { this.value = value; } |
88 |
public int hashCode() { return this.value.hashCode() & 1; } |
89 |
public boolean equals(final Object obj) { |
90 |
return (obj instanceof CollidingObject) && ((CollidingObject)obj).value.equals(value); |
91 |
} |
92 |
} |
93 |
|
94 |
static class ComparableCollidingObject extends CollidingObject implements Comparable<ComparableCollidingObject> { |
95 |
ComparableCollidingObject(final String value) { super(value); } |
96 |
public int compareTo(final ComparableCollidingObject o) { |
97 |
return value.compareTo(o.value); |
98 |
} |
99 |
} |
100 |
|
101 |
/** |
102 |
* Inserted elements that are subclasses of the same Comparable |
103 |
* class are found. |
104 |
*/ |
105 |
public void testComparableFamily() { |
106 |
ConcurrentHashMap<BI, Boolean> m = |
107 |
new ConcurrentHashMap<BI, Boolean>(); |
108 |
for (int i = 0; i < 1000; i++) { |
109 |
assertTrue(m.put(new CI(i), true) == null); |
110 |
} |
111 |
for (int i = 0; i < 1000; i++) { |
112 |
assertTrue(m.containsKey(new CI(i))); |
113 |
assertTrue(m.containsKey(new DI(i))); |
114 |
} |
115 |
} |
116 |
|
117 |
/** |
118 |
* Elements of classes with erased generic type parameters based |
119 |
* on Comparable can be inserted and found. |
120 |
*/ |
121 |
public void testGenericComparable() { |
122 |
ConcurrentHashMap<Object, Boolean> m = |
123 |
new ConcurrentHashMap<Object, Boolean>(); |
124 |
for (int i = 0; i < 1000; i++) { |
125 |
BI bi = new BI(i); |
126 |
BS bs = new BS(String.valueOf(i)); |
127 |
LexicographicList<BI> bis = new LexicographicList<BI>(bi); |
128 |
LexicographicList<BS> bss = new LexicographicList<BS>(bs); |
129 |
assertTrue(m.putIfAbsent(bis, true) == null); |
130 |
assertTrue(m.containsKey(bis)); |
131 |
if (m.putIfAbsent(bss, true) == null) |
132 |
assertTrue(m.containsKey(bss)); |
133 |
assertTrue(m.containsKey(bis)); |
134 |
} |
135 |
for (int i = 0; i < 1000; i++) { |
136 |
assertTrue(m.containsKey(new ArrayList(Collections.singleton(new BI(i))))); |
137 |
} |
138 |
} |
139 |
|
140 |
/** |
141 |
* Elements of non-comparable classes equal to those of classes |
142 |
* with erased generic type parameters based on Comparable can be |
143 |
* inserted and found. |
144 |
*/ |
145 |
public void testGenericComparable2() { |
146 |
ConcurrentHashMap<Object, Boolean> m = |
147 |
new ConcurrentHashMap<Object, Boolean>(); |
148 |
for (int i = 0; i < 1000; i++) { |
149 |
m.put(new ArrayList(Collections.singleton(new BI(i))), true); |
150 |
} |
151 |
|
152 |
for (int i = 0; i < 1000; i++) { |
153 |
LexicographicList<BI> bis = new LexicographicList<BI>(new BI(i)); |
154 |
assertTrue(m.containsKey(bis)); |
155 |
} |
156 |
} |
157 |
|
158 |
/** |
159 |
* Mixtures of instances of comparable and non-comparable classes |
160 |
* can be inserted and found. |
161 |
*/ |
162 |
public void testMixedComparable() { |
163 |
int size = 10000; |
164 |
ConcurrentHashMap<Object, Object> map = |
165 |
new ConcurrentHashMap<Object, Object>(); |
166 |
Random rng = new Random(1370014958369218000L); |
167 |
for (int i = 0; i < size; i++) { |
168 |
Object x; |
169 |
switch (rng.nextInt(4)) { |
170 |
case 0: |
171 |
x = new Object(); |
172 |
break; |
173 |
case 1: |
174 |
x = new CollidingObject(Integer.toString(i)); |
175 |
break; |
176 |
default: |
177 |
x = new ComparableCollidingObject(Integer.toString(i)); |
178 |
} |
179 |
assertNull(map.put(x, x)); |
180 |
} |
181 |
int count = 0; |
182 |
for (Object k : map.keySet()) { |
183 |
assertEquals(map.get(k), k); |
184 |
++count; |
185 |
} |
186 |
assertEquals(count, size); |
187 |
assertEquals(map.size(), size); |
188 |
for (Object k : map.keySet()) { |
189 |
assertEquals(map.put(k, k), k); |
190 |
} |
191 |
} |
192 |
|
193 |
/** |
194 |
* clear removes all pairs |
195 |
*/ |
196 |
public void testClear() { |
197 |
ConcurrentHashMap map = map5(); |
198 |
map.clear(); |
199 |
assertEquals(0, map.size()); |
200 |
} |
201 |
|
202 |
/** |
203 |
* Maps with same contents are equal |
204 |
*/ |
205 |
public void testEquals() { |
206 |
ConcurrentHashMap map1 = map5(); |
207 |
ConcurrentHashMap map2 = map5(); |
208 |
assertEquals(map1, map2); |
209 |
assertEquals(map2, map1); |
210 |
map1.clear(); |
211 |
assertFalse(map1.equals(map2)); |
212 |
assertFalse(map2.equals(map1)); |
213 |
} |
214 |
|
215 |
|
216 |
/** |
217 |
* hashCode() equals sum of each key.hashCode ^ value.hashCode |
218 |
*/ |
219 |
public void testHashCode() { |
220 |
ConcurrentHashMap<Integer,String> map = map5(); |
221 |
int sum = 0; |
222 |
for (Map.Entry<Integer,String> e : map.entrySet()) |
223 |
sum += e.getKey().hashCode() ^ e.getValue().hashCode(); |
224 |
assertEquals(sum, map.hashCode()); |
225 |
} |
226 |
|
227 |
/** |
228 |
* contains returns true for contained value |
229 |
*/ |
230 |
public void testContains() { |
231 |
ConcurrentHashMap map = map5(); |
232 |
assertTrue(map.contains("A")); |
233 |
assertFalse(map.contains("Z")); |
234 |
} |
235 |
|
236 |
/** |
237 |
* containsKey returns true for contained key |
238 |
*/ |
239 |
public void testContainsKey() { |
240 |
ConcurrentHashMap map = map5(); |
241 |
assertTrue(map.containsKey(one)); |
242 |
assertFalse(map.containsKey(zero)); |
243 |
} |
244 |
|
245 |
/** |
246 |
* containsValue returns true for held values |
247 |
*/ |
248 |
public void testContainsValue() { |
249 |
ConcurrentHashMap map = map5(); |
250 |
assertTrue(map.containsValue("A")); |
251 |
assertFalse(map.containsValue("Z")); |
252 |
} |
253 |
|
254 |
/** |
255 |
* enumeration returns an enumeration containing the correct |
256 |
* elements |
257 |
*/ |
258 |
public void testEnumeration() { |
259 |
ConcurrentHashMap map = map5(); |
260 |
Enumeration e = map.elements(); |
261 |
int count = 0; |
262 |
while (e.hasMoreElements()) { |
263 |
count++; |
264 |
e.nextElement(); |
265 |
} |
266 |
assertEquals(5, count); |
267 |
} |
268 |
|
269 |
/** |
270 |
* get returns the correct element at the given key, |
271 |
* or null if not present |
272 |
*/ |
273 |
public void testGet() { |
274 |
ConcurrentHashMap map = map5(); |
275 |
assertEquals("A", (String)map.get(one)); |
276 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
277 |
assertNull(map.get("anything")); |
278 |
} |
279 |
|
280 |
/** |
281 |
* isEmpty is true of empty map and false for non-empty |
282 |
*/ |
283 |
public void testIsEmpty() { |
284 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
285 |
ConcurrentHashMap map = map5(); |
286 |
assertTrue(empty.isEmpty()); |
287 |
assertFalse(map.isEmpty()); |
288 |
} |
289 |
|
290 |
/** |
291 |
* keys returns an enumeration containing all the keys from the map |
292 |
*/ |
293 |
public void testKeys() { |
294 |
ConcurrentHashMap map = map5(); |
295 |
Enumeration e = map.keys(); |
296 |
int count = 0; |
297 |
while (e.hasMoreElements()) { |
298 |
count++; |
299 |
e.nextElement(); |
300 |
} |
301 |
assertEquals(5, count); |
302 |
} |
303 |
|
304 |
/** |
305 |
* keySet returns a Set containing all the keys |
306 |
*/ |
307 |
public void testKeySet() { |
308 |
ConcurrentHashMap map = map5(); |
309 |
Set s = map.keySet(); |
310 |
assertEquals(5, s.size()); |
311 |
assertTrue(s.contains(one)); |
312 |
assertTrue(s.contains(two)); |
313 |
assertTrue(s.contains(three)); |
314 |
assertTrue(s.contains(four)); |
315 |
assertTrue(s.contains(five)); |
316 |
} |
317 |
|
318 |
/** |
319 |
* keySet.toArray returns contains all keys |
320 |
*/ |
321 |
public void testKeySetToArray() { |
322 |
ConcurrentHashMap map = map5(); |
323 |
Set s = map.keySet(); |
324 |
Object[] ar = s.toArray(); |
325 |
assertTrue(s.containsAll(Arrays.asList(ar))); |
326 |
assertEquals(5, ar.length); |
327 |
ar[0] = m10; |
328 |
assertFalse(s.containsAll(Arrays.asList(ar))); |
329 |
} |
330 |
|
331 |
/** |
332 |
* Values.toArray contains all values |
333 |
*/ |
334 |
public void testValuesToArray() { |
335 |
ConcurrentHashMap map = map5(); |
336 |
Collection v = map.values(); |
337 |
Object[] ar = v.toArray(); |
338 |
ArrayList s = new ArrayList(Arrays.asList(ar)); |
339 |
assertEquals(5, ar.length); |
340 |
assertTrue(s.contains("A")); |
341 |
assertTrue(s.contains("B")); |
342 |
assertTrue(s.contains("C")); |
343 |
assertTrue(s.contains("D")); |
344 |
assertTrue(s.contains("E")); |
345 |
} |
346 |
|
347 |
/** |
348 |
* entrySet.toArray contains all entries |
349 |
*/ |
350 |
public void testEntrySetToArray() { |
351 |
ConcurrentHashMap map = map5(); |
352 |
Set s = map.entrySet(); |
353 |
Object[] ar = s.toArray(); |
354 |
assertEquals(5, ar.length); |
355 |
for (int i = 0; i < 5; ++i) { |
356 |
assertTrue(map.containsKey(((Map.Entry)(ar[i])).getKey())); |
357 |
assertTrue(map.containsValue(((Map.Entry)(ar[i])).getValue())); |
358 |
} |
359 |
} |
360 |
|
361 |
/** |
362 |
* values collection contains all values |
363 |
*/ |
364 |
public void testValues() { |
365 |
ConcurrentHashMap map = map5(); |
366 |
Collection s = map.values(); |
367 |
assertEquals(5, s.size()); |
368 |
assertTrue(s.contains("A")); |
369 |
assertTrue(s.contains("B")); |
370 |
assertTrue(s.contains("C")); |
371 |
assertTrue(s.contains("D")); |
372 |
assertTrue(s.contains("E")); |
373 |
} |
374 |
|
375 |
/** |
376 |
* entrySet contains all pairs |
377 |
*/ |
378 |
public void testEntrySet() { |
379 |
ConcurrentHashMap map = map5(); |
380 |
Set s = map.entrySet(); |
381 |
assertEquals(5, s.size()); |
382 |
Iterator it = s.iterator(); |
383 |
while (it.hasNext()) { |
384 |
Map.Entry e = (Map.Entry) it.next(); |
385 |
assertTrue( |
386 |
(e.getKey().equals(one) && e.getValue().equals("A")) || |
387 |
(e.getKey().equals(two) && e.getValue().equals("B")) || |
388 |
(e.getKey().equals(three) && e.getValue().equals("C")) || |
389 |
(e.getKey().equals(four) && e.getValue().equals("D")) || |
390 |
(e.getKey().equals(five) && e.getValue().equals("E"))); |
391 |
} |
392 |
} |
393 |
|
394 |
/** |
395 |
* putAll adds all key-value pairs from the given map |
396 |
*/ |
397 |
public void testPutAll() { |
398 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
399 |
ConcurrentHashMap map = map5(); |
400 |
empty.putAll(map); |
401 |
assertEquals(5, empty.size()); |
402 |
assertTrue(empty.containsKey(one)); |
403 |
assertTrue(empty.containsKey(two)); |
404 |
assertTrue(empty.containsKey(three)); |
405 |
assertTrue(empty.containsKey(four)); |
406 |
assertTrue(empty.containsKey(five)); |
407 |
} |
408 |
|
409 |
/** |
410 |
* putIfAbsent works when the given key is not present |
411 |
*/ |
412 |
public void testPutIfAbsent() { |
413 |
ConcurrentHashMap map = map5(); |
414 |
map.putIfAbsent(six, "Z"); |
415 |
assertTrue(map.containsKey(six)); |
416 |
} |
417 |
|
418 |
/** |
419 |
* putIfAbsent does not add the pair if the key is already present |
420 |
*/ |
421 |
public void testPutIfAbsent2() { |
422 |
ConcurrentHashMap map = map5(); |
423 |
assertEquals("A", map.putIfAbsent(one, "Z")); |
424 |
} |
425 |
|
426 |
/** |
427 |
* replace fails when the given key is not present |
428 |
*/ |
429 |
public void testReplace() { |
430 |
ConcurrentHashMap map = map5(); |
431 |
assertNull(map.replace(six, "Z")); |
432 |
assertFalse(map.containsKey(six)); |
433 |
} |
434 |
|
435 |
/** |
436 |
* replace succeeds if the key is already present |
437 |
*/ |
438 |
public void testReplace2() { |
439 |
ConcurrentHashMap map = map5(); |
440 |
assertNotNull(map.replace(one, "Z")); |
441 |
assertEquals("Z", map.get(one)); |
442 |
} |
443 |
|
444 |
/** |
445 |
* replace value fails when the given key not mapped to expected value |
446 |
*/ |
447 |
public void testReplaceValue() { |
448 |
ConcurrentHashMap map = map5(); |
449 |
assertEquals("A", map.get(one)); |
450 |
assertFalse(map.replace(one, "Z", "Z")); |
451 |
assertEquals("A", map.get(one)); |
452 |
} |
453 |
|
454 |
/** |
455 |
* replace value succeeds when the given key mapped to expected value |
456 |
*/ |
457 |
public void testReplaceValue2() { |
458 |
ConcurrentHashMap map = map5(); |
459 |
assertEquals("A", map.get(one)); |
460 |
assertTrue(map.replace(one, "A", "Z")); |
461 |
assertEquals("Z", map.get(one)); |
462 |
} |
463 |
|
464 |
/** |
465 |
* remove removes the correct key-value pair from the map |
466 |
*/ |
467 |
public void testRemove() { |
468 |
ConcurrentHashMap map = map5(); |
469 |
map.remove(five); |
470 |
assertEquals(4, map.size()); |
471 |
assertFalse(map.containsKey(five)); |
472 |
} |
473 |
|
474 |
/** |
475 |
* remove(key,value) removes only if pair present |
476 |
*/ |
477 |
public void testRemove2() { |
478 |
ConcurrentHashMap map = map5(); |
479 |
map.remove(five, "E"); |
480 |
assertEquals(4, map.size()); |
481 |
assertFalse(map.containsKey(five)); |
482 |
map.remove(four, "A"); |
483 |
assertEquals(4, map.size()); |
484 |
assertTrue(map.containsKey(four)); |
485 |
} |
486 |
|
487 |
/** |
488 |
* size returns the correct values |
489 |
*/ |
490 |
public void testSize() { |
491 |
ConcurrentHashMap map = map5(); |
492 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
493 |
assertEquals(0, empty.size()); |
494 |
assertEquals(5, map.size()); |
495 |
} |
496 |
|
497 |
/** |
498 |
* toString contains toString of elements |
499 |
*/ |
500 |
public void testToString() { |
501 |
ConcurrentHashMap map = map5(); |
502 |
String s = map.toString(); |
503 |
for (int i = 1; i <= 5; ++i) { |
504 |
assertTrue(s.contains(String.valueOf(i))); |
505 |
} |
506 |
} |
507 |
|
508 |
// Exception tests |
509 |
|
510 |
/** |
511 |
* Cannot create with only negative capacity |
512 |
*/ |
513 |
public void testConstructor1() { |
514 |
try { |
515 |
new ConcurrentHashMap(-1); |
516 |
shouldThrow(); |
517 |
} catch (IllegalArgumentException success) {} |
518 |
} |
519 |
|
520 |
/** |
521 |
* Constructor (initialCapacity, loadFactor) throws |
522 |
* IllegalArgumentException if either argument is negative |
523 |
*/ |
524 |
public void testConstructor2() { |
525 |
try { |
526 |
new ConcurrentHashMap(-1, .75f); |
527 |
shouldThrow(); |
528 |
} catch (IllegalArgumentException e) {} |
529 |
|
530 |
try { |
531 |
new ConcurrentHashMap(16, -1); |
532 |
shouldThrow(); |
533 |
} catch (IllegalArgumentException e) {} |
534 |
} |
535 |
|
536 |
/** |
537 |
* Constructor (initialCapacity, loadFactor, concurrencyLevel) |
538 |
* throws IllegalArgumentException if any argument is negative |
539 |
*/ |
540 |
public void testConstructor3() { |
541 |
try { |
542 |
new ConcurrentHashMap(-1, .75f, 1); |
543 |
shouldThrow(); |
544 |
} catch (IllegalArgumentException e) {} |
545 |
|
546 |
try { |
547 |
new ConcurrentHashMap(16, -1, 1); |
548 |
shouldThrow(); |
549 |
} catch (IllegalArgumentException e) {} |
550 |
|
551 |
try { |
552 |
new ConcurrentHashMap(16, .75f, -1); |
553 |
shouldThrow(); |
554 |
} catch (IllegalArgumentException e) {} |
555 |
} |
556 |
|
557 |
/** |
558 |
* ConcurrentHashMap(map) throws NullPointerException if the given |
559 |
* map is null |
560 |
*/ |
561 |
public void testConstructor4() { |
562 |
try { |
563 |
new ConcurrentHashMap(null); |
564 |
shouldThrow(); |
565 |
} catch (NullPointerException e) {} |
566 |
} |
567 |
|
568 |
/** |
569 |
* ConcurrentHashMap(map) creates a new map with the same mappings |
570 |
* as the given map |
571 |
*/ |
572 |
public void testConstructor5() { |
573 |
ConcurrentHashMap map1 = map5(); |
574 |
ConcurrentHashMap map2 = new ConcurrentHashMap(map5()); |
575 |
assertTrue(map2.equals(map1)); |
576 |
map2.put(one, "F"); |
577 |
assertFalse(map2.equals(map1)); |
578 |
} |
579 |
|
580 |
|
581 |
/** |
582 |
* get(null) throws NPE |
583 |
*/ |
584 |
public void testGet_NullPointerException() { |
585 |
try { |
586 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
587 |
c.get(null); |
588 |
shouldThrow(); |
589 |
} catch (NullPointerException success) {} |
590 |
} |
591 |
|
592 |
/** |
593 |
* containsKey(null) throws NPE |
594 |
*/ |
595 |
public void testContainsKey_NullPointerException() { |
596 |
try { |
597 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
598 |
c.containsKey(null); |
599 |
shouldThrow(); |
600 |
} catch (NullPointerException success) {} |
601 |
} |
602 |
|
603 |
/** |
604 |
* containsValue(null) throws NPE |
605 |
*/ |
606 |
public void testContainsValue_NullPointerException() { |
607 |
try { |
608 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
609 |
c.containsValue(null); |
610 |
shouldThrow(); |
611 |
} catch (NullPointerException success) {} |
612 |
} |
613 |
|
614 |
/** |
615 |
* contains(null) throws NPE |
616 |
*/ |
617 |
public void testContains_NullPointerException() { |
618 |
try { |
619 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
620 |
c.contains(null); |
621 |
shouldThrow(); |
622 |
} catch (NullPointerException success) {} |
623 |
} |
624 |
|
625 |
/** |
626 |
* put(null,x) throws NPE |
627 |
*/ |
628 |
public void testPut1_NullPointerException() { |
629 |
try { |
630 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
631 |
c.put(null, "whatever"); |
632 |
shouldThrow(); |
633 |
} catch (NullPointerException success) {} |
634 |
} |
635 |
|
636 |
/** |
637 |
* put(x, null) throws NPE |
638 |
*/ |
639 |
public void testPut2_NullPointerException() { |
640 |
try { |
641 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
642 |
c.put("whatever", null); |
643 |
shouldThrow(); |
644 |
} catch (NullPointerException success) {} |
645 |
} |
646 |
|
647 |
/** |
648 |
* putIfAbsent(null, x) throws NPE |
649 |
*/ |
650 |
public void testPutIfAbsent1_NullPointerException() { |
651 |
try { |
652 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
653 |
c.putIfAbsent(null, "whatever"); |
654 |
shouldThrow(); |
655 |
} catch (NullPointerException success) {} |
656 |
} |
657 |
|
658 |
/** |
659 |
* replace(null, x) throws NPE |
660 |
*/ |
661 |
public void testReplace_NullPointerException() { |
662 |
try { |
663 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
664 |
c.replace(null, "whatever"); |
665 |
shouldThrow(); |
666 |
} catch (NullPointerException success) {} |
667 |
} |
668 |
|
669 |
/** |
670 |
* replace(null, x, y) throws NPE |
671 |
*/ |
672 |
public void testReplaceValue_NullPointerException() { |
673 |
try { |
674 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
675 |
c.replace(null, one, "whatever"); |
676 |
shouldThrow(); |
677 |
} catch (NullPointerException success) {} |
678 |
} |
679 |
|
680 |
/** |
681 |
* putIfAbsent(x, null) throws NPE |
682 |
*/ |
683 |
public void testPutIfAbsent2_NullPointerException() { |
684 |
try { |
685 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
686 |
c.putIfAbsent("whatever", null); |
687 |
shouldThrow(); |
688 |
} catch (NullPointerException success) {} |
689 |
} |
690 |
|
691 |
/** |
692 |
* replace(x, null) throws NPE |
693 |
*/ |
694 |
public void testReplace2_NullPointerException() { |
695 |
try { |
696 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
697 |
c.replace("whatever", null); |
698 |
shouldThrow(); |
699 |
} catch (NullPointerException success) {} |
700 |
} |
701 |
|
702 |
/** |
703 |
* replace(x, null, y) throws NPE |
704 |
*/ |
705 |
public void testReplaceValue2_NullPointerException() { |
706 |
try { |
707 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
708 |
c.replace("whatever", null, "A"); |
709 |
shouldThrow(); |
710 |
} catch (NullPointerException success) {} |
711 |
} |
712 |
|
713 |
/** |
714 |
* replace(x, y, null) throws NPE |
715 |
*/ |
716 |
public void testReplaceValue3_NullPointerException() { |
717 |
try { |
718 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
719 |
c.replace("whatever", one, null); |
720 |
shouldThrow(); |
721 |
} catch (NullPointerException success) {} |
722 |
} |
723 |
|
724 |
/** |
725 |
* remove(null) throws NPE |
726 |
*/ |
727 |
public void testRemove1_NullPointerException() { |
728 |
try { |
729 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
730 |
c.put("sadsdf", "asdads"); |
731 |
c.remove(null); |
732 |
shouldThrow(); |
733 |
} catch (NullPointerException success) {} |
734 |
} |
735 |
|
736 |
/** |
737 |
* remove(null, x) throws NPE |
738 |
*/ |
739 |
public void testRemove2_NullPointerException() { |
740 |
try { |
741 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
742 |
c.put("sadsdf", "asdads"); |
743 |
c.remove(null, "whatever"); |
744 |
shouldThrow(); |
745 |
} catch (NullPointerException success) {} |
746 |
} |
747 |
|
748 |
/** |
749 |
* remove(x, null) returns false |
750 |
*/ |
751 |
public void testRemove3() { |
752 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
753 |
c.put("sadsdf", "asdads"); |
754 |
assertFalse(c.remove("sadsdf", null)); |
755 |
} |
756 |
|
757 |
/** |
758 |
* A deserialized map equals original |
759 |
*/ |
760 |
public void testSerialization() throws Exception { |
761 |
Map x = map5(); |
762 |
Map y = serialClone(x); |
763 |
|
764 |
assertNotSame(x, y); |
765 |
assertEquals(x.size(), y.size()); |
766 |
assertEquals(x, y); |
767 |
assertEquals(y, x); |
768 |
} |
769 |
|
770 |
/** |
771 |
* SetValue of an EntrySet entry sets value in the map. |
772 |
*/ |
773 |
public void testSetValueWriteThrough() { |
774 |
// Adapted from a bug report by Eric Zoerner |
775 |
ConcurrentHashMap map = new ConcurrentHashMap(2, 5.0f, 1); |
776 |
assertTrue(map.isEmpty()); |
777 |
for (int i = 0; i < 20; i++) |
778 |
map.put(new Integer(i), new Integer(i)); |
779 |
assertFalse(map.isEmpty()); |
780 |
Map.Entry entry1 = (Map.Entry)map.entrySet().iterator().next(); |
781 |
// Unless it happens to be first (in which case remainder of |
782 |
// test is skipped), remove a possibly-colliding key from map |
783 |
// which, under some implementations, may cause entry1 to be |
784 |
// cloned in map |
785 |
if (!entry1.getKey().equals(new Integer(16))) { |
786 |
map.remove(new Integer(16)); |
787 |
entry1.setValue("XYZ"); |
788 |
assertTrue(map.containsValue("XYZ")); // fails if write-through broken |
789 |
} |
790 |
} |
791 |
|
792 |
} |