1 |
/* |
2 |
* Written by members of JCP JSR-166 Expert Group and released to the |
3 |
* public domain. Use, modify, and redistribute this code in any way |
4 |
* without acknowledgement. Other contributors include Andrew Wright, |
5 |
* Jeffrey Hayes, Pat Fischer, Mike Judd. |
6 |
*/ |
7 |
|
8 |
import junit.framework.*; |
9 |
import java.util.*; |
10 |
import java.util.concurrent.*; |
11 |
import java.util.Enumeration; |
12 |
import java.io.*; |
13 |
|
14 |
public class ConcurrentHashMapTest extends JSR166TestCase{ |
15 |
public static void main(String[] args) { |
16 |
junit.textui.TestRunner.run (suite()); |
17 |
} |
18 |
public static Test suite() { |
19 |
return new TestSuite(ConcurrentHashMapTest.class); |
20 |
} |
21 |
|
22 |
/** |
23 |
* Create a map from Integers 1-5 to Strings "A"-"E". |
24 |
*/ |
25 |
private static ConcurrentHashMap map5() { |
26 |
ConcurrentHashMap map = new ConcurrentHashMap(5); |
27 |
assertTrue(map.isEmpty()); |
28 |
map.put(one, "A"); |
29 |
map.put(two, "B"); |
30 |
map.put(three, "C"); |
31 |
map.put(four, "D"); |
32 |
map.put(five, "E"); |
33 |
assertFalse(map.isEmpty()); |
34 |
assertEquals(5, map.size()); |
35 |
return map; |
36 |
} |
37 |
|
38 |
/** |
39 |
* clear removes all pairs |
40 |
*/ |
41 |
public void testClear() { |
42 |
ConcurrentHashMap map = map5(); |
43 |
map.clear(); |
44 |
assertEquals(map.size(), 0); |
45 |
} |
46 |
|
47 |
/** |
48 |
* Maps with same contents are equal |
49 |
*/ |
50 |
public void testEquals() { |
51 |
ConcurrentHashMap map1 = map5(); |
52 |
ConcurrentHashMap map2 = map5(); |
53 |
assertEquals(map1, map2); |
54 |
assertEquals(map2, map1); |
55 |
map1.clear(); |
56 |
assertFalse(map1.equals(map2)); |
57 |
assertFalse(map2.equals(map1)); |
58 |
} |
59 |
|
60 |
/** |
61 |
* contains returns true for contained value |
62 |
*/ |
63 |
public void testContains() { |
64 |
ConcurrentHashMap map = map5(); |
65 |
assertTrue(map.contains("A")); |
66 |
assertFalse(map.contains("Z")); |
67 |
} |
68 |
|
69 |
/** |
70 |
* containsKey returns true for contained key |
71 |
*/ |
72 |
public void testContainsKey() { |
73 |
ConcurrentHashMap map = map5(); |
74 |
assertTrue(map.containsKey(one)); |
75 |
assertFalse(map.containsKey(zero)); |
76 |
} |
77 |
|
78 |
/** |
79 |
* containsValue returns true for held values |
80 |
*/ |
81 |
public void testContainsValue() { |
82 |
ConcurrentHashMap map = map5(); |
83 |
assertTrue(map.contains("A")); |
84 |
assertFalse(map.contains("Z")); |
85 |
} |
86 |
|
87 |
/** |
88 |
* enumeration returns an enumeration containing the correct |
89 |
* elements |
90 |
*/ |
91 |
public void testEnumeration() { |
92 |
ConcurrentHashMap map = map5(); |
93 |
Enumeration e = map.elements(); |
94 |
int count = 0; |
95 |
while(e.hasMoreElements()){ |
96 |
count++; |
97 |
e.nextElement(); |
98 |
} |
99 |
assertEquals(5, count); |
100 |
} |
101 |
|
102 |
/** |
103 |
* Clone creates an equal map |
104 |
*/ |
105 |
public void testClone() { |
106 |
ConcurrentHashMap map = map5(); |
107 |
ConcurrentHashMap m2 = (ConcurrentHashMap)(map.clone()); |
108 |
assertEquals(map, m2); |
109 |
} |
110 |
|
111 |
/** |
112 |
* get returns the correct element at the given key, |
113 |
* or null if not present |
114 |
*/ |
115 |
public void testGet() { |
116 |
ConcurrentHashMap map = map5(); |
117 |
assertEquals("A", (String)map.get(one)); |
118 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
119 |
assertNull(map.get("anything")); |
120 |
} |
121 |
|
122 |
/** |
123 |
* isEmpty is true of empty map and false for non-empty |
124 |
*/ |
125 |
public void testIsEmpty() { |
126 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
127 |
ConcurrentHashMap map = map5(); |
128 |
assertTrue(empty.isEmpty()); |
129 |
assertFalse(map.isEmpty()); |
130 |
} |
131 |
|
132 |
/** |
133 |
* keys returns an enumeration containing all the keys from the map |
134 |
*/ |
135 |
public void testKeys() { |
136 |
ConcurrentHashMap map = map5(); |
137 |
Enumeration e = map.keys(); |
138 |
int count = 0; |
139 |
while(e.hasMoreElements()){ |
140 |
count++; |
141 |
e.nextElement(); |
142 |
} |
143 |
assertEquals(5, count); |
144 |
} |
145 |
|
146 |
/** |
147 |
* keySet returns a Set containing all the keys |
148 |
*/ |
149 |
public void testKeySet() { |
150 |
ConcurrentHashMap map = map5(); |
151 |
Set s = map.keySet(); |
152 |
assertEquals(5, s.size()); |
153 |
assertTrue(s.contains(one)); |
154 |
assertTrue(s.contains(two)); |
155 |
assertTrue(s.contains(three)); |
156 |
assertTrue(s.contains(four)); |
157 |
assertTrue(s.contains(five)); |
158 |
} |
159 |
|
160 |
/** |
161 |
* values collection contains all values |
162 |
*/ |
163 |
public void testValues() { |
164 |
ConcurrentHashMap map = map5(); |
165 |
Collection s = map.values(); |
166 |
assertEquals(5, s.size()); |
167 |
assertTrue(s.contains("A")); |
168 |
assertTrue(s.contains("B")); |
169 |
assertTrue(s.contains("C")); |
170 |
assertTrue(s.contains("D")); |
171 |
assertTrue(s.contains("E")); |
172 |
} |
173 |
|
174 |
/** |
175 |
* entrySet contains all pairs |
176 |
*/ |
177 |
public void testEntrySet() { |
178 |
ConcurrentHashMap map = map5(); |
179 |
Set s = map.entrySet(); |
180 |
assertEquals(5, s.size()); |
181 |
Iterator it = s.iterator(); |
182 |
while (it.hasNext()) { |
183 |
Map.Entry e = (Map.Entry) it.next(); |
184 |
assertTrue( |
185 |
(e.getKey().equals(one) && e.getValue().equals("A")) || |
186 |
(e.getKey().equals(two) && e.getValue().equals("B")) || |
187 |
(e.getKey().equals(three) && e.getValue().equals("C")) || |
188 |
(e.getKey().equals(four) && e.getValue().equals("D")) || |
189 |
(e.getKey().equals(five) && e.getValue().equals("E"))); |
190 |
} |
191 |
} |
192 |
|
193 |
/** |
194 |
* putAll adds all key-value pairs from the given map |
195 |
*/ |
196 |
public void testPutAll() { |
197 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
198 |
ConcurrentHashMap map = map5(); |
199 |
empty.putAll(map); |
200 |
assertEquals(5, empty.size()); |
201 |
assertTrue(empty.containsKey(one)); |
202 |
assertTrue(empty.containsKey(two)); |
203 |
assertTrue(empty.containsKey(three)); |
204 |
assertTrue(empty.containsKey(four)); |
205 |
assertTrue(empty.containsKey(five)); |
206 |
} |
207 |
|
208 |
/** |
209 |
* putIfAbsent works when the given key is not present |
210 |
*/ |
211 |
public void testPutIfAbsent() { |
212 |
ConcurrentHashMap map = map5(); |
213 |
map.putIfAbsent(new Integer(6), "Z"); |
214 |
assertTrue(map.containsKey(new Integer(6))); |
215 |
} |
216 |
|
217 |
/** |
218 |
* putIfAbsent does not add the pair if the key is already present |
219 |
*/ |
220 |
public void testPutIfAbsent2() { |
221 |
ConcurrentHashMap map = map5(); |
222 |
assertEquals("A", map.putIfAbsent(one, "Z")); |
223 |
} |
224 |
|
225 |
/** |
226 |
* remove removes the correct key-value pair from the map |
227 |
*/ |
228 |
public void testRemove() { |
229 |
ConcurrentHashMap map = map5(); |
230 |
map.remove(five); |
231 |
assertEquals(4, map.size()); |
232 |
assertFalse(map.containsKey(five)); |
233 |
} |
234 |
|
235 |
/** |
236 |
* remove(key,value) removes only if pair present |
237 |
*/ |
238 |
public void testRemove2() { |
239 |
ConcurrentHashMap map = map5(); |
240 |
map.remove(five, "E"); |
241 |
assertEquals(4, map.size()); |
242 |
assertFalse(map.containsKey(five)); |
243 |
map.remove(four, "A"); |
244 |
assertEquals(4, map.size()); |
245 |
assertTrue(map.containsKey(four)); |
246 |
|
247 |
} |
248 |
|
249 |
/** |
250 |
* size returns the correct values |
251 |
*/ |
252 |
public void testSize() { |
253 |
ConcurrentHashMap map = map5(); |
254 |
ConcurrentHashMap empty = new ConcurrentHashMap(); |
255 |
assertEquals(0, empty.size()); |
256 |
assertEquals(5, map.size()); |
257 |
} |
258 |
|
259 |
/** |
260 |
* toString contains toString of elements |
261 |
*/ |
262 |
public void testToString() { |
263 |
ConcurrentHashMap map = map5(); |
264 |
String s = map.toString(); |
265 |
for (int i = 1; i <= 5; ++i) { |
266 |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
267 |
} |
268 |
} |
269 |
|
270 |
// Exception tests |
271 |
|
272 |
/** |
273 |
* Cannot create with negative capacity |
274 |
*/ |
275 |
public void testConstructor1() { |
276 |
try { |
277 |
new ConcurrentHashMap(-1,0,1); |
278 |
shouldThrow(); |
279 |
} catch(IllegalArgumentException e){} |
280 |
} |
281 |
|
282 |
/** |
283 |
* Cannot create with negative concurrency level |
284 |
*/ |
285 |
public void testConstructor2() { |
286 |
try { |
287 |
new ConcurrentHashMap(1,0,-1); |
288 |
shouldThrow(); |
289 |
} catch(IllegalArgumentException e){} |
290 |
} |
291 |
|
292 |
/** |
293 |
* Cannot create with only negative capacity |
294 |
*/ |
295 |
public void testConstructor3() { |
296 |
try { |
297 |
new ConcurrentHashMap(-1); |
298 |
shouldThrow(); |
299 |
} catch(IllegalArgumentException e){} |
300 |
} |
301 |
|
302 |
/** |
303 |
* get(null) throws NPE |
304 |
*/ |
305 |
public void testGet_NullPointerException() { |
306 |
try { |
307 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
308 |
c.get(null); |
309 |
shouldThrow(); |
310 |
} catch(NullPointerException e){} |
311 |
} |
312 |
|
313 |
/** |
314 |
* containsKey(null) throws NPE |
315 |
*/ |
316 |
public void testContainsKey_NullPointerException() { |
317 |
try { |
318 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
319 |
c.containsKey(null); |
320 |
shouldThrow(); |
321 |
} catch(NullPointerException e){} |
322 |
} |
323 |
|
324 |
/** |
325 |
* containsValue(null) throws NPE |
326 |
*/ |
327 |
public void testContainsValue_NullPointerException() { |
328 |
try { |
329 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
330 |
c.containsValue(null); |
331 |
shouldThrow(); |
332 |
} catch(NullPointerException e){} |
333 |
} |
334 |
|
335 |
/** |
336 |
* contains(null) throws NPE |
337 |
*/ |
338 |
public void testContains_NullPointerException() { |
339 |
try { |
340 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
341 |
c.contains(null); |
342 |
shouldThrow(); |
343 |
} catch(NullPointerException e){} |
344 |
} |
345 |
|
346 |
/** |
347 |
* put(null,x) throws NPE |
348 |
*/ |
349 |
public void testPut1_NullPointerException() { |
350 |
try { |
351 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
352 |
c.put(null, "whatever"); |
353 |
shouldThrow(); |
354 |
} catch(NullPointerException e){} |
355 |
} |
356 |
|
357 |
/** |
358 |
* put(x, null) throws NPE |
359 |
*/ |
360 |
public void testPut2_NullPointerException() { |
361 |
try { |
362 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
363 |
c.put("whatever", null); |
364 |
shouldThrow(); |
365 |
} catch(NullPointerException e){} |
366 |
} |
367 |
|
368 |
/** |
369 |
* putIfAbsent(null, x) throws NPE |
370 |
*/ |
371 |
public void testPutIfAbsent1_NullPointerException() { |
372 |
try { |
373 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
374 |
c.putIfAbsent(null, "whatever"); |
375 |
shouldThrow(); |
376 |
} catch(NullPointerException e){} |
377 |
} |
378 |
|
379 |
/** |
380 |
* putIfAbsent(x, null) throws NPE |
381 |
*/ |
382 |
public void testPutIfAbsent2_NullPointerException() { |
383 |
try { |
384 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
385 |
c.putIfAbsent("whatever", null); |
386 |
shouldThrow(); |
387 |
} catch(NullPointerException e){} |
388 |
} |
389 |
|
390 |
|
391 |
/** |
392 |
* remove(null) throws NPE |
393 |
*/ |
394 |
public void testRemove1_NullPointerException() { |
395 |
try { |
396 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
397 |
c.put("sadsdf", "asdads"); |
398 |
c.remove(null); |
399 |
shouldThrow(); |
400 |
} catch(NullPointerException e){} |
401 |
} |
402 |
|
403 |
/** |
404 |
* remove(null, x) throws NPE |
405 |
*/ |
406 |
public void testRemove2_NullPointerException() { |
407 |
try { |
408 |
ConcurrentHashMap c = new ConcurrentHashMap(5); |
409 |
c.put("sadsdf", "asdads"); |
410 |
c.remove(null, "whatever"); |
411 |
shouldThrow(); |
412 |
} catch(NullPointerException e){} |
413 |
} |
414 |
|
415 |
/** |
416 |
* A deserialized map equals original |
417 |
*/ |
418 |
public void testSerialization() { |
419 |
ConcurrentHashMap q = map5(); |
420 |
|
421 |
try { |
422 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
423 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
424 |
out.writeObject(q); |
425 |
out.close(); |
426 |
|
427 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
428 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
429 |
ConcurrentHashMap r = (ConcurrentHashMap)in.readObject(); |
430 |
assertEquals(q.size(), r.size()); |
431 |
assertTrue(q.equals(r)); |
432 |
assertTrue(r.equals(q)); |
433 |
} catch(Exception e){ |
434 |
e.printStackTrace(); |
435 |
unexpectedException(); |
436 |
} |
437 |
} |
438 |
|
439 |
} |