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root/jsr166/jsr166/src/test/tck/ConcurrentHashMapTest.java

Comparing jsr166/src/test/tck/ConcurrentHashMapTest.java (file contents):
Revision 1.1 by dl, Sun Aug 31 19:24:54 2003 UTC vs.
Revision 1.19 by jsr166, Sat Nov 21 17:38:05 2009 UTC

#	Line 1 | Line 1
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.
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/licenses/publicdomain
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.*;
12		import java.util.Enumeration;
13	+	import java.io.*;
14
15	<	public class ConcurrentHashMapTest extends TestCase{
15	>	public class ConcurrentHashMapTest extends JSR166TestCase {
16		public static void main(String[] args) {
17	<	junit.textui.TestRunner.run (suite());
17	>	junit.textui.TestRunner.run (suite());
18		}
19		public static Test suite() {
20	<	return new TestSuite(ConcurrentHashMapTest.class);
20	>	return new TestSuite(ConcurrentHashMapTest.class);
21		}
22
23	<	static final Integer one = new Integer(1);
24	<	static final Integer two = new Integer(2);
25	<	static final Integer three = new Integer(3);
26	<	static final Integer four = new Integer(4);
27	<	static final Integer five = new Integer(5);
26	<
27	<	private static ConcurrentHashMap map5() {
28	<	ConcurrentHashMap map = new ConcurrentHashMap(5);
23	>	/**
24	>	* Create a map from Integers 1-5 to Strings "A"-"E".
25	>	*/
26	>	private static ConcurrentHashMap map5() {
27	>	ConcurrentHashMap map = new ConcurrentHashMap(5);
28		assertTrue(map.isEmpty());
29	<	map.put(one, "A");
30	<	map.put(two, "B");
31	<	map.put(three, "C");
32	<	map.put(four, "D");
33	<	map.put(five, "E");
29	>	map.put(one, "A");
30	>	map.put(two, "B");
31	>	map.put(three, "C");
32	>	map.put(four, "D");
33	>	map.put(five, "E");
34		assertFalse(map.isEmpty());
35		assertEquals(5, map.size());
36	<	return map;
36	>	return map;
37		}
38
39		/**
40	<	*  Test to verify clear correctly removes all key-element pairs from the map
40	>	*  clear removes all pairs
41		*/
42	<	public void testClear(){
42	>	public void testClear() {
43		ConcurrentHashMap map = map5();
44	<	map.clear();
45	<	assertEquals(map.size(), 0);
44	>	map.clear();
45	>	assertEquals(map.size(), 0);
46		}
47
48		/**
49	<	*  Test to verify contains gives the appropriate value
49	>	*  Maps with same contents are equal
50		*/
51	<	public void testContains(){
52	<	ConcurrentHashMap map = map5();
53	<	assertTrue(map.contains("A"));
54	<	assertFalse(map.contains("Z"));
51	>	public void testEquals() {
52	>	ConcurrentHashMap map1 = map5();
53	>	ConcurrentHashMap map2 = map5();
54	>	assertEquals(map1, map2);
55	>	assertEquals(map2, map1);
56	>	map1.clear();
57	>	assertFalse(map1.equals(map2));
58	>	assertFalse(map2.equals(map1));
59		}
60	<
60	>
61		/**
62	<	*  Test to verify containsKey gives the appropriate value
62	>	*  contains returns true for contained value
63		*/
64	<	public void testContainsKey(){
64	>	public void testContains() {
65		ConcurrentHashMap map = map5();
66	<	assertTrue(map.containsKey(one));
67	<	assertFalse(map.containsKey(new Integer(100)));
66	>	assertTrue(map.contains("A"));
67	>	assertFalse(map.contains("Z"));
68		}
69
70		/**
71	<	*  Identical to normal contains
71	>	*  containsKey returns true for contained key
72		*/
73	<	public void testContainsValue(){
73	>	public void testContainsKey() {
74		ConcurrentHashMap map = map5();
75	<	assertTrue(map.contains("A"));
76	<	assertFalse(map.contains("Z"));
75	>	assertTrue(map.containsKey(one));
76	>	assertFalse(map.containsKey(zero));
77		}
78
79		/**
80	<	*  tes to verify enumeration returns an enumeration containing the correct elements
80	>	*  containsValue returns true for held values
81		*/
82	<	public void testEnumeration(){
82	>	public void testContainsValue() {
83		ConcurrentHashMap map = map5();
84	<	Enumeration e = map.elements();
85	<	int count = 0;
83	<	while(e.hasMoreElements()){
84	<	count++;
85	<	e.nextElement();
86	<	}
87	<	assertEquals(5, count);
84	>	assertTrue(map.containsValue("A"));
85	>	assertFalse(map.containsValue("Z"));
86		}
87
88		/**
89	<	*  Test to verify get returns the correct element at the given index
89	>	*   enumeration returns an enumeration containing the correct
90	>	*   elements
91		*/
92	<	public void testGet(){
92	>	public void testEnumeration() {
93		ConcurrentHashMap map = map5();
94	<	assertEquals("A", (String)map.get(one));
94	>	Enumeration e = map.elements();
95	>	int count = 0;
96	>	while (e.hasMoreElements()) {
97	>	count++;
98	>	e.nextElement();
99	>	}
100	>	assertEquals(5, count);
101		}
102
103		/**
104	<	*  Test to verify get on a nonexistant key returns null
104	>	*  get returns the correct element at the given key,
105	>	*  or null if not present
106		*/
107	<	public void testGet2(){
107	>	public void testGet() {
108	>	ConcurrentHashMap map = map5();
109	>	assertEquals("A", (String)map.get(one));
110		ConcurrentHashMap empty = new ConcurrentHashMap();
111	<	assertNull(empty.get("anything"));
111	>	assertNull(map.get("anything"));
112		}
113
114		/**
115	<	*  Simple test to verify isEmpty returns the correct value
115	>	*  isEmpty is true of empty map and false for non-empty
116		*/
117	<	public void testIsEmpty(){
117	>	public void testIsEmpty() {
118		ConcurrentHashMap empty = new ConcurrentHashMap();
119		ConcurrentHashMap map = map5();
120	<	assertTrue(empty.isEmpty());
120	>	assertTrue(empty.isEmpty());
121		assertFalse(map.isEmpty());
122		}
123
124		/**
125	<	*  Test to verify keys returns an enumeration containing all the keys from the map
125	>	*   keys returns an enumeration containing all the keys from the map
126		*/
127	<	public void testKeys(){
127	>	public void testKeys() {
128		ConcurrentHashMap map = map5();
129	<	Enumeration e = map.keys();
130	<	int count = 0;
131	<	while(e.hasMoreElements()){
132	<	count++;
133	<	e.nextElement();
134	<	}
135	<	assertEquals(5, count);
129	>	Enumeration e = map.keys();
130	>	int count = 0;
131	>	while (e.hasMoreElements()) {
132	>	count++;
133	>	e.nextElement();
134	>	}
135	>	assertEquals(5, count);
136		}
137
138		/**
139	<	*  Test to verify keySet returns a Set containing all the keys
139	>	*   keySet returns a Set containing all the keys
140		*/
141	<	public void testKeySet(){
141	>	public void testKeySet() {
142		ConcurrentHashMap map = map5();
143	<	Set s = map.keySet();
144	<	assertEquals(5, s.size());
145	<	assertTrue(s.contains(one));
146	<	assertTrue(s.contains(two));
147	<	assertTrue(s.contains(three));
148	<	assertTrue(s.contains(four));
149	<	assertTrue(s.contains(five));
143	>	Set s = map.keySet();
144	>	assertEquals(5, s.size());
145	>	assertTrue(s.contains(one));
146	>	assertTrue(s.contains(two));
147	>	assertTrue(s.contains(three));
148	>	assertTrue(s.contains(four));
149	>	assertTrue(s.contains(five));
150		}
151
152	<	public void testValues(){
152	>	/**
153	>	*  keySet.toArray returns contains all keys
154	>	*/
155	>	public void testKeySetToArray() {
156		ConcurrentHashMap map = map5();
157	<	Collection s = map.values();
158	<	assertEquals(5, s.size());
159	<	assertTrue(s.contains("A"));
160	<	assertTrue(s.contains("B"));
161	<	assertTrue(s.contains("C"));
162	<	assertTrue(s.contains("D"));
152	<	assertTrue(s.contains("E"));
157	>	Set s = map.keySet();
158	>	Object[] ar = s.toArray();
159	>	assertTrue(s.containsAll(Arrays.asList(ar)));
160	>	assertEquals(5, ar.length);
161	>	ar[0] = m10;
162	>	assertFalse(s.containsAll(Arrays.asList(ar)));
163		}
164
165	<	public void testEntrySet(){
165	>	/**
166	>	*  Values.toArray contains all values
167	>	*/
168	>	public void testValuesToArray() {
169		ConcurrentHashMap map = map5();
170	<	Set s = map.entrySet();
171	<	assertEquals(5, s.size());
170	>	Collection v = map.values();
171	>	Object[] ar = v.toArray();
172	>	ArrayList s = new ArrayList(Arrays.asList(ar));
173	>	assertEquals(5, ar.length);
174	>	assertTrue(s.contains("A"));
175	>	assertTrue(s.contains("B"));
176	>	assertTrue(s.contains("C"));
177	>	assertTrue(s.contains("D"));
178	>	assertTrue(s.contains("E"));
179	>	}
180	>
181	>	/**
182	>	*  entrySet.toArray contains all entries
183	>	*/
184	>	public void testEntrySetToArray() {
185	>	ConcurrentHashMap map = map5();
186	>	Set s = map.entrySet();
187	>	Object[] ar = s.toArray();
188	>	assertEquals(5, ar.length);
189	>	for (int i = 0; i < 5; ++i) {
190	>	assertTrue(map.containsKey(((Map.Entry)(ar[i])).getKey()));
191	>	assertTrue(map.containsValue(((Map.Entry)(ar[i])).getValue()));
192	>	}
193	>	}
194	>
195	>	/**
196	>	* values collection contains all values
197	>	*/
198	>	public void testValues() {
199	>	ConcurrentHashMap map = map5();
200	>	Collection s = map.values();
201	>	assertEquals(5, s.size());
202	>	assertTrue(s.contains("A"));
203	>	assertTrue(s.contains("B"));
204	>	assertTrue(s.contains("C"));
205	>	assertTrue(s.contains("D"));
206	>	assertTrue(s.contains("E"));
207	>	}
208	>
209	>	/**
210	>	* entrySet contains all pairs
211	>	*/
212	>	public void testEntrySet() {
213	>	ConcurrentHashMap map = map5();
214	>	Set s = map.entrySet();
215	>	assertEquals(5, s.size());
216		Iterator it = s.iterator();
217		while (it.hasNext()) {
218		Map.Entry e = (Map.Entry) it.next();
219	<	assertTrue(
219	>	assertTrue(
220		(e.getKey().equals(one) && e.getValue().equals("A")) ||
221		(e.getKey().equals(two) && e.getValue().equals("B")) ||
222		(e.getKey().equals(three) && e.getValue().equals("C")) ||
#	Line 169 | Line 226 | public class ConcurrentHashMapTest exten
226		}
227
228		/**
229	<	*  Test to verify putAll correctly adds all key-value pairs from the given map
229	>	*   putAll  adds all key-value pairs from the given map
230		*/
231	<	public void testPutAll(){
231	>	public void testPutAll() {
232		ConcurrentHashMap empty = new ConcurrentHashMap();
233		ConcurrentHashMap map = map5();
234	<	empty.putAll(map);
235	<	assertEquals(5, empty.size());
236	<	assertTrue(empty.containsKey(one));
237	<	assertTrue(empty.containsKey(two));
238	<	assertTrue(empty.containsKey(three));
239	<	assertTrue(empty.containsKey(four));
240	<	assertTrue(empty.containsKey(five));
234	>	empty.putAll(map);
235	>	assertEquals(5, empty.size());
236	>	assertTrue(empty.containsKey(one));
237	>	assertTrue(empty.containsKey(two));
238	>	assertTrue(empty.containsKey(three));
239	>	assertTrue(empty.containsKey(four));
240	>	assertTrue(empty.containsKey(five));
241		}
242
243		/**
244	<	*  Test to verify putIfAbsent works when the given key is not present
244	>	*   putIfAbsent works when the given key is not present
245		*/
246	<	public void testPutIfAbsent(){
246	>	public void testPutIfAbsent() {
247		ConcurrentHashMap map = map5();
248	<	map.putIfAbsent(new Integer(6), "Z");
249	<	assertTrue(map.containsKey(new Integer(6)));
248	>	map.putIfAbsent(six, "Z");
249	>	assertTrue(map.containsKey(six));
250		}
251
252		/**
253	<	*  Test to verify putIfAbsent does not add the pair if the key is already present
253	>	*   putIfAbsent does not add the pair if the key is already present
254		*/
255	<	public void testPutIfAbsent2(){
255	>	public void testPutIfAbsent2() {
256		ConcurrentHashMap map = map5();
257		assertEquals("A", map.putIfAbsent(one, "Z"));
258		}
259
260		/**
261	<	*  Test to verify remove removes the correct key-value pair from the map
261	>	*   replace fails when the given key is not present
262	>	*/
263	>	public void testReplace() {
264	>	ConcurrentHashMap map = map5();
265	>	assertNull(map.replace(six, "Z"));
266	>	assertFalse(map.containsKey(six));
267	>	}
268	>
269	>	/**
270	>	*   replace succeeds if the key is already present
271		*/
272	<	public void testRemove(){
272	>	public void testReplace2() {
273		ConcurrentHashMap map = map5();
274	<	map.remove(five);
275	<	assertEquals(4, map.size());
210	<	assertFalse(map.containsKey(five));
274	>	assertNotNull(map.replace(one, "Z"));
275	>	assertEquals("Z", map.get(one));
276		}
277
278	<	public void testRemove2(){
278	>
279	>	/**
280	>	* replace value fails when the given key not mapped to expected value
281	>	*/
282	>	public void testReplaceValue() {
283		ConcurrentHashMap map = map5();
284	<	map.remove(five, "E");
285	<	assertEquals(4, map.size());
286	<	assertFalse(map.containsKey(five));
287	<	map.remove(four, "A");
219	<	assertEquals(4, map.size());
220	<	assertTrue(map.containsKey(four));
284	>	assertEquals("A", map.get(one));
285	>	assertFalse(map.replace(one, "Z", "Z"));
286	>	assertEquals("A", map.get(one));
287	>	}
288
289	+	/**
290	+	* replace value succeeds when the given key mapped to expected value
291	+	*/
292	+	public void testReplaceValue2() {
293	+	ConcurrentHashMap map = map5();
294	+	assertEquals("A", map.get(one));
295	+	assertTrue(map.replace(one, "A", "Z"));
296	+	assertEquals("Z", map.get(one));
297	+	}
298	+
299	+
300	+	/**
301	+	*   remove removes the correct key-value pair from the map
302	+	*/
303	+	public void testRemove() {
304	+	ConcurrentHashMap map = map5();
305	+	map.remove(five);
306	+	assertEquals(4, map.size());
307	+	assertFalse(map.containsKey(five));
308		}
309
310		/**
311	<	*  Simple test to verify size returns the correct values
311	>	* remove(key,value) removes only if pair present
312		*/
313	<	public void testSize(){
313	>	public void testRemove2() {
314	>	ConcurrentHashMap map = map5();
315	>	map.remove(five, "E");
316	>	assertEquals(4, map.size());
317	>	assertFalse(map.containsKey(five));
318	>	map.remove(four, "A");
319	>	assertEquals(4, map.size());
320	>	assertTrue(map.containsKey(four));
321	>
322	>	}
323	>
324	>	/**
325	>	*   size returns the correct values
326	>	*/
327	>	public void testSize() {
328		ConcurrentHashMap map = map5();
329		ConcurrentHashMap empty = new ConcurrentHashMap();
330	<	assertEquals(0, empty.size());
331	<	assertEquals(5, map.size());
330	>	assertEquals(0, empty.size());
331	>	assertEquals(5, map.size());
332		}
333
334	<	public void testToString(){
334	>	/**
335	>	* toString contains toString of elements
336	>	*/
337	>	public void testToString() {
338		ConcurrentHashMap map = map5();
339		String s = map.toString();
340		for (int i = 1; i <= 5; ++i) {
341		assertTrue(s.indexOf(String.valueOf(i)) >= 0);
342		}
343	<	}
343	>	}
344
345		// Exception tests
346	<
347	<	public void testConstructor1(){
348	<	try{
346	>
347	>	/**
348	>	* Cannot create with negative capacity
349	>	*/
350	>	public void testConstructor1() {
351	>	try {
352		new ConcurrentHashMap(-1,0,1);
353	<	fail("ConcurrentHashMap(int, float, int) should throw Illegal Argument Exception");
354	<	}catch(IllegalArgumentException e){}
353	>	shouldThrow();
354	>	} catch (IllegalArgumentException success) {}
355		}
356
357	<	public void testConstructor2(){
358	<	try{
357	>	/**
358	>	* Cannot create with negative concurrency level
359	>	*/
360	>	public void testConstructor2() {
361	>	try {
362		new ConcurrentHashMap(1,0,-1);
363	<	fail("ConcurrentHashMap(int, float, int) should throw Illegal Argument Exception");
364	<	}catch(IllegalArgumentException e){}
363	>	shouldThrow();
364	>	} catch (IllegalArgumentException success) {}
365		}
366
367	<	public void testConstructor3(){
368	<	try{
367	>	/**
368	>	* Cannot create with only negative capacity
369	>	*/
370	>	public void testConstructor3() {
371	>	try {
372		new ConcurrentHashMap(-1);
373	<	fail("ConcurrentHashMap(int) should throw Illegal Argument Exception");
374	<	}catch(IllegalArgumentException e){}
373	>	shouldThrow();
374	>	} catch (IllegalArgumentException success) {}
375		}
376
377	<	public void testGet_NullPointerException(){
378	<	try{
377	>	/**
378	>	* get(null) throws NPE
379	>	*/
380	>	public void testGet_NullPointerException() {
381	>	try {
382		ConcurrentHashMap c = new ConcurrentHashMap(5);
383		c.get(null);
384	<	fail("ConcurrentHashMap - Object get(Object) should throw Null Pointer exception");
385	<	}catch(NullPointerException e){}
384	>	shouldThrow();
385	>	} catch (NullPointerException success) {}
386		}
387
388	<	public void testContainsKey_NullPointerException(){
389	<	try{
388	>	/**
389	>	* containsKey(null) throws NPE
390	>	*/
391	>	public void testContainsKey_NullPointerException() {
392	>	try {
393		ConcurrentHashMap c = new ConcurrentHashMap(5);
394		c.containsKey(null);
395	<	fail("ConcurrenthashMap - boolean containsKey(Object) should throw Null Pointer exception");
396	<	}catch(NullPointerException e){}
395	>	shouldThrow();
396	>	} catch (NullPointerException success) {}
397		}
398
399	<	public void testContainsValue_NullPointerException(){
400	<	try{
399	>	/**
400	>	* containsValue(null) throws NPE
401	>	*/
402	>	public void testContainsValue_NullPointerException() {
403	>	try {
404		ConcurrentHashMap c = new ConcurrentHashMap(5);
405		c.containsValue(null);
406	<	fail("ConcurrentHashMap - boolean containsValue(Object) should throw Null Pointer exception");
407	<	}catch(NullPointerException e){}
406	>	shouldThrow();
407	>	} catch (NullPointerException success) {}
408		}
409
410	<	public void testContains_NullPointerException(){
411	<	try{
410	>	/**
411	>	* contains(null) throws NPE
412	>	*/
413	>	public void testContains_NullPointerException() {
414	>	try {
415		ConcurrentHashMap c = new ConcurrentHashMap(5);
416		c.contains(null);
417	<	fail("ConcurrentHashMap - boolean contains(Object) should throw Null Pointer exception");
418	<	}catch(NullPointerException e){}
417	>	shouldThrow();
418	>	} catch (NullPointerException success) {}
419		}
420
421	<	public void testPut1_NullPointerException(){
422	<	try{
421	>	/**
422	>	* put(null,x) throws NPE
423	>	*/
424	>	public void testPut1_NullPointerException() {
425	>	try {
426		ConcurrentHashMap c = new ConcurrentHashMap(5);
427		c.put(null, "whatever");
428	<	fail("ConcurrentHashMap - Object put(Object, Object) should throw Null Pointer exception");
429	<	}catch(NullPointerException e){}
428	>	shouldThrow();
429	>	} catch (NullPointerException success) {}
430		}
431
432	<	public void testPut2_NullPointerException(){
433	<	try{
432	>	/**
433	>	* put(x, null) throws NPE
434	>	*/
435	>	public void testPut2_NullPointerException() {
436	>	try {
437		ConcurrentHashMap c = new ConcurrentHashMap(5);
438		c.put("whatever", null);
439	<	fail("ConcurrentHashMap - Object put(Object, Object) should throw Null Pointer exception");
440	<	}catch(NullPointerException e){}
439	>	shouldThrow();
440	>	} catch (NullPointerException success) {}
441		}
442
443	<	public void testPutIfAbsent1_NullPointerException(){
444	<	try{
443	>	/**
444	>	* putIfAbsent(null, x) throws NPE
445	>	*/
446	>	public void testPutIfAbsent1_NullPointerException() {
447	>	try {
448		ConcurrentHashMap c = new ConcurrentHashMap(5);
449		c.putIfAbsent(null, "whatever");
450	<	fail("ConcurrentHashMap - Object putIfAbsent(Object, Object) should throw Null Pointer exception");
451	<	}catch(NullPointerException e){}
450	>	shouldThrow();
451	>	} catch (NullPointerException success) {}
452		}
453
454	<	public void testPutIfAbsent2_NullPointerException(){
455	<	try{
454	>	/**
455	>	* replace(null, x) throws NPE
456	>	*/
457	>	public void testReplace_NullPointerException() {
458	>	try {
459	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
460	>	c.replace(null, "whatever");
461	>	shouldThrow();
462	>	} catch (NullPointerException success) {}
463	>	}
464	>
465	>	/**
466	>	* replace(null, x, y) throws NPE
467	>	*/
468	>	public void testReplaceValue_NullPointerException() {
469	>	try {
470	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
471	>	c.replace(null, one, "whatever");
472	>	shouldThrow();
473	>	} catch (NullPointerException success) {}
474	>	}
475	>
476	>	/**
477	>	* putIfAbsent(x, null) throws NPE
478	>	*/
479	>	public void testPutIfAbsent2_NullPointerException() {
480	>	try {
481		ConcurrentHashMap c = new ConcurrentHashMap(5);
482		c.putIfAbsent("whatever", null);
483	<	fail("COncurrentHashMap - Object putIfAbsent(Object, Object) should throw Null Pointer exception");
484	<	}catch(NullPointerException e){}
483	>	shouldThrow();
484	>	} catch (NullPointerException success) {}
485		}
486
487
488	<	public void testRemove1_NullPointerException(){
489	<	try{
488	>	/**
489	>	* replace(x, null) throws NPE
490	>	*/
491	>	public void testReplace2_NullPointerException() {
492	>	try {
493	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
494	>	c.replace("whatever", null);
495	>	shouldThrow();
496	>	} catch (NullPointerException success) {}
497	>	}
498	>
499	>	/**
500	>	* replace(x, null, y) throws NPE
501	>	*/
502	>	public void testReplaceValue2_NullPointerException() {
503	>	try {
504	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
505	>	c.replace("whatever", null, "A");
506	>	shouldThrow();
507	>	} catch (NullPointerException success) {}
508	>	}
509	>
510	>	/**
511	>	* replace(x, y, null) throws NPE
512	>	*/
513	>	public void testReplaceValue3_NullPointerException() {
514	>	try {
515	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
516	>	c.replace("whatever", one, null);
517	>	shouldThrow();
518	>	} catch (NullPointerException success) {}
519	>	}
520	>
521	>
522	>	/**
523	>	* remove(null) throws NPE
524	>	*/
525	>	public void testRemove1_NullPointerException() {
526	>	try {
527		ConcurrentHashMap c = new ConcurrentHashMap(5);
528		c.put("sadsdf", "asdads");
529		c.remove(null);
530	<	fail("ConcurrentHashMap - Object remove(Object) should throw Null pointer exceptione");
531	<	}catch(NullPointerException e){}
530	>	shouldThrow();
531	>	} catch (NullPointerException success) {}
532		}
533
534	<	public void testRemove2_NullPointerException(){
535	<	try{
534	>	/**
535	>	* remove(null, x) throws NPE
536	>	*/
537	>	public void testRemove2_NullPointerException() {
538	>	try {
539		ConcurrentHashMap c = new ConcurrentHashMap(5);
540		c.put("sadsdf", "asdads");
541		c.remove(null, "whatever");
542	<	fail("ConcurrentHashMap - Object remove(Object, Object) should throw Null pointer exceptione");
543	<	}catch(NullPointerException e){}
542	>	shouldThrow();
543	>	} catch (NullPointerException success) {}
544	>	}
545	>
546	>	/**
547	>	* remove(x, null) returns false
548	>	*/
549	>	public void testRemove3() {
550	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
551	>	c.put("sadsdf", "asdads");
552	>	assertFalse(c.remove("sadsdf", null));
553	>	}
554	>
555	>	/**
556	>	* A deserialized map equals original
557	>	*/
558	>	public void testSerialization() throws Exception {
559	>	ConcurrentHashMap q = map5();
560	>
561	>	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
562	>	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
563	>	out.writeObject(q);
564	>	out.close();
565	>
566	>	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
567	>	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
568	>	ConcurrentHashMap r = (ConcurrentHashMap)in.readObject();
569	>	assertEquals(q.size(), r.size());
570	>	assertTrue(q.equals(r));
571	>	assertTrue(r.equals(q));
572	>	}
573	>
574	>
575	>	/**
576	>	* SetValue of an EntrySet entry sets value in the map.
577	>	*/
578	>	public void testSetValueWriteThrough() {
579	>	// Adapted from a bug report by Eric Zoerner
580	>	ConcurrentHashMap map = new ConcurrentHashMap(2, 5.0f, 1);
581	>	assertTrue(map.isEmpty());
582	>	for (int i = 0; i < 20; i++)
583	>	map.put(new Integer(i), new Integer(i));
584	>	assertFalse(map.isEmpty());
585	>	Map.Entry entry1 = (Map.Entry)map.entrySet().iterator().next();
586	>
587	>	// assert that entry1 is not 16
588	>	assertTrue("entry is 16, test not valid",
589	>	!entry1.getKey().equals(new Integer(16)));
590	>
591	>	// remove 16 (a different key) from map
592	>	// which just happens to cause entry1 to be cloned in map
593	>	map.remove(new Integer(16));
594	>	entry1.setValue("XYZ");
595	>	assertTrue(map.containsValue("XYZ")); // fails
596		}
597	<
597	>
598		}

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