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Comparing jsr166/src/test/tck/ConcurrentHashMapTest.java (file contents):
Revision 1.11 by dl, Fri Jul 2 10:26:28 2004 UTC vs.
Revision 1.40 by jsr166, Wed Dec 31 19:05:42 2014 UTC

#	Line 1 | Line 1
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/licenses/publicdomain
5	<	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	<	* Pat Fisher, Mike Judd.
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.*;
9	>	import java.util.ArrayList;
10	>	import java.util.Arrays;
11	>	import java.util.Collection;
12	>	import java.util.Collections;
13		import java.util.Enumeration;
14	<	import java.io.*;
14	>	import java.util.Iterator;
15	>	import java.util.Map;
16	>	import java.util.Random;
17	>	import java.util.Set;
18	>	import java.util.concurrent.ConcurrentHashMap;
19
20	<	public class ConcurrentHashMapTest extends JSR166TestCase{
20	>	import junit.framework.Test;
21	>	import junit.framework.TestSuite;
22	>
23	>	public class ConcurrentHashMapTest extends JSR166TestCase {
24		public static void main(String[] args) {
25	<	junit.textui.TestRunner.run (suite());
25	>	junit.textui.TestRunner.run(suite());
26		}
27		public static Test suite() {
28	<	return new TestSuite(ConcurrentHashMapTest.class);
28	>	return new TestSuite(ConcurrentHashMapTest.class);
29		}
30
31		/**
32	<	* Create a map from Integers 1-5 to Strings "A"-"E".
32	>	* Returns a new map from Integers 1-5 to Strings "A"-"E".
33		*/
34	<	private static ConcurrentHashMap map5() {
35	<	ConcurrentHashMap map = new ConcurrentHashMap(5);
34	>	private static ConcurrentHashMap<Integer, String> map5() {
35	>	ConcurrentHashMap map = new ConcurrentHashMap<Integer, String>(5);
36		assertTrue(map.isEmpty());
37	<	map.put(one, "A");
38	<	map.put(two, "B");
39	<	map.put(three, "C");
40	<	map.put(four, "D");
41	<	map.put(five, "E");
37	>	map.put(one, "A");
38	>	map.put(two, "B");
39	>	map.put(three, "C");
40	>	map.put(four, "D");
41	>	map.put(five, "E");
42		assertFalse(map.isEmpty());
43		assertEquals(5, map.size());
44	<	return map;
44	>	return map;
45	>	}
46	>
47	>	/** Re-implement Integer.compare for old java versions */
48	>	static int compare(int x, int y) { return x < y ? -1 : x > y ? 1 : 0; }
49	>
50	>	// classes for testing Comparable fallbacks
51	>	static class BI implements Comparable<BI> {
52	>	private final int value;
53	>	BI(int value) { this.value = value; }
54	>	public int compareTo(BI other) {
55	>	return compare(value, other.value);
56	>	}
57	>	public boolean equals(Object x) {
58	>	return (x instanceof BI) && ((BI)x).value == value;
59	>	}
60	>	public int hashCode() { return 42; }
61	>	}
62	>	static class CI extends BI { CI(int value) { super(value); } }
63	>	static class DI extends BI { DI(int value) { super(value); } }
64	>
65	>	static class BS implements Comparable<BS> {
66	>	private final String value;
67	>	BS(String value) { this.value = value; }
68	>	public int compareTo(BS other) {
69	>	return value.compareTo(other.value);
70	>	}
71	>	public boolean equals(Object x) {
72	>	return (x instanceof BS) && value.equals(((BS)x).value);
73	>	}
74	>	public int hashCode() { return 42; }
75	>	}
76	>
77	>	static class LexicographicList<E extends Comparable<E>> extends ArrayList<E>
78	>	implements Comparable<LexicographicList<E>> {
79	>	LexicographicList(Collection<E> c) { super(c); }
80	>	LexicographicList(E e) { super(Collections.singleton(e)); }
81	>	public int compareTo(LexicographicList<E> other) {
82	>	int common = Math.min(size(), other.size());
83	>	int r = 0;
84	>	for (int i = 0; i < common; i++) {
85	>	if ((r = get(i).compareTo(other.get(i))) != 0)
86	>	break;
87	>	}
88	>	if (r == 0)
89	>	r = compare(size(), other.size());
90	>	return r;
91	>	}
92	>	private static final long serialVersionUID = 0;
93	>	}
94	>
95	>	static class CollidingObject {
96	>	final String value;
97	>	CollidingObject(final String value) { this.value = value; }
98	>	public int hashCode() { return this.value.hashCode() & 1; }
99	>	public boolean equals(final Object obj) {
100	>	return (obj instanceof CollidingObject) && ((CollidingObject)obj).value.equals(value);
101	>	}
102	>	}
103	>
104	>	static class ComparableCollidingObject extends CollidingObject implements Comparable<ComparableCollidingObject> {
105	>	ComparableCollidingObject(final String value) { super(value); }
106	>	public int compareTo(final ComparableCollidingObject o) {
107	>	return value.compareTo(o.value);
108	>	}
109	>	}
110	>
111	>	/**
112	>	* Inserted elements that are subclasses of the same Comparable
113	>	* class are found.
114	>	*/
115	>	public void testComparableFamily() {
116	>	int size = 500;         // makes measured test run time -> 60ms
117	>	ConcurrentHashMap<BI, Boolean> m =
118	>	new ConcurrentHashMap<BI, Boolean>();
119	>	for (int i = 0; i < size; i++) {
120	>	assertTrue(m.put(new CI(i), true) == null);
121	>	}
122	>	for (int i = 0; i < size; i++) {
123	>	assertTrue(m.containsKey(new CI(i)));
124	>	assertTrue(m.containsKey(new DI(i)));
125	>	}
126	>	}
127	>
128	>	/**
129	>	* Elements of classes with erased generic type parameters based
130	>	* on Comparable can be inserted and found.
131	>	*/
132	>	public void testGenericComparable() {
133	>	int size = 120;         // makes measured test run time -> 60ms
134	>	ConcurrentHashMap<Object, Boolean> m =
135	>	new ConcurrentHashMap<Object, Boolean>();
136	>	for (int i = 0; i < size; i++) {
137	>	BI bi = new BI(i);
138	>	BS bs = new BS(String.valueOf(i));
139	>	LexicographicList<BI> bis = new LexicographicList<BI>(bi);
140	>	LexicographicList<BS> bss = new LexicographicList<BS>(bs);
141	>	assertTrue(m.putIfAbsent(bis, true) == null);
142	>	assertTrue(m.containsKey(bis));
143	>	if (m.putIfAbsent(bss, true) == null)
144	>	assertTrue(m.containsKey(bss));
145	>	assertTrue(m.containsKey(bis));
146	>	}
147	>	for (int i = 0; i < size; i++) {
148	>	assertTrue(m.containsKey(Collections.singletonList(new BI(i))));
149	>	}
150	>	}
151	>
152	>	/**
153	>	* Elements of non-comparable classes equal to those of classes
154	>	* with erased generic type parameters based on Comparable can be
155	>	* inserted and found.
156	>	*/
157	>	public void testGenericComparable2() {
158	>	int size = 500;         // makes measured test run time -> 60ms
159	>	ConcurrentHashMap<Object, Boolean> m =
160	>	new ConcurrentHashMap<Object, Boolean>();
161	>	for (int i = 0; i < size; i++) {
162	>	m.put(Collections.singletonList(new BI(i)), true);
163	>	}
164	>
165	>	for (int i = 0; i < size; i++) {
166	>	LexicographicList<BI> bis = new LexicographicList<BI>(new BI(i));
167	>	assertTrue(m.containsKey(bis));
168	>	}
169	>	}
170	>
171	>	/**
172	>	* Mixtures of instances of comparable and non-comparable classes
173	>	* can be inserted and found.
174	>	*/
175	>	public void testMixedComparable() {
176	>	int size = 1200;        // makes measured test run time -> 35ms
177	>	ConcurrentHashMap<Object, Object> map =
178	>	new ConcurrentHashMap<Object, Object>();
179	>	Random rng = new Random();
180	>	for (int i = 0; i < size; i++) {
181	>	Object x;
182	>	switch (rng.nextInt(4)) {
183	>	case 0:
184	>	x = new Object();
185	>	break;
186	>	case 1:
187	>	x = new CollidingObject(Integer.toString(i));
188	>	break;
189	>	default:
190	>	x = new ComparableCollidingObject(Integer.toString(i));
191	>	}
192	>	assertNull(map.put(x, x));
193	>	}
194	>	int count = 0;
195	>	for (Object k : map.keySet()) {
196	>	assertEquals(map.get(k), k);
197	>	++count;
198	>	}
199	>	assertEquals(count, size);
200	>	assertEquals(map.size(), size);
201	>	for (Object k : map.keySet()) {
202	>	assertEquals(map.put(k, k), k);
203	>	}
204		}
205
206		/**
207	<	*  clear removes all pairs
207	>	* clear removes all pairs
208		*/
209		public void testClear() {
210		ConcurrentHashMap map = map5();
211	<	map.clear();
212	<	assertEquals(map.size(), 0);
211	>	map.clear();
212	>	assertEquals(0, map.size());
213		}
214
215		/**
216	<	*  Maps with same contents are equal
216	>	* Maps with same contents are equal
217		*/
218		public void testEquals() {
219		ConcurrentHashMap map1 = map5();
220		ConcurrentHashMap map2 = map5();
221		assertEquals(map1, map2);
222		assertEquals(map2, map1);
223	<	map1.clear();
223	>	map1.clear();
224		assertFalse(map1.equals(map2));
225		assertFalse(map2.equals(map1));
226		}
227
228		/**
229	<	*  contains returns true for contained value
229	>	* hashCode() equals sum of each key.hashCode ^ value.hashCode
230	>	*/
231	>	public void testHashCode() {
232	>	ConcurrentHashMap<Integer,String> map = map5();
233	>	int sum = 0;
234	>	for (Map.Entry<Integer,String> e : map.entrySet())
235	>	sum += e.getKey().hashCode() ^ e.getValue().hashCode();
236	>	assertEquals(sum, map.hashCode());
237	>	}
238	>
239	>	/**
240	>	* contains returns true for contained value
241		*/
242		public void testContains() {
243		ConcurrentHashMap map = map5();
244	<	assertTrue(map.contains("A"));
244	>	assertTrue(map.contains("A"));
245		assertFalse(map.contains("Z"));
246		}
247	<
247	>
248		/**
249	<	*  containsKey returns true for contained key
249	>	* containsKey returns true for contained key
250		*/
251		public void testContainsKey() {
252		ConcurrentHashMap map = map5();
253	<	assertTrue(map.containsKey(one));
253	>	assertTrue(map.containsKey(one));
254		assertFalse(map.containsKey(zero));
255		}
256
257		/**
258	<	*  containsValue returns true for held values
258	>	* containsValue returns true for held values
259		*/
260		public void testContainsValue() {
261		ConcurrentHashMap map = map5();
262	<	assertTrue(map.containsValue("A"));
262	>	assertTrue(map.containsValue("A"));
263		assertFalse(map.containsValue("Z"));
264		}
265
266		/**
267	<	*   enumeration returns an enumeration containing the correct
268	<	*   elements
267	>	* enumeration returns an enumeration containing the correct
268	>	* elements
269		*/
270		public void testEnumeration() {
271		ConcurrentHashMap map = map5();
272	<	Enumeration e = map.elements();
273	<	int count = 0;
274	<	while(e.hasMoreElements()){
275	<	count++;
276	<	e.nextElement();
277	<	}
278	<	assertEquals(5, count);
272	>	Enumeration e = map.elements();
273	>	int count = 0;
274	>	while (e.hasMoreElements()) {
275	>	count++;
276	>	e.nextElement();
277	>	}
278	>	assertEquals(5, count);
279		}
280
281		/**
282	<	*  get returns the correct element at the given key,
283	<	*  or null if not present
282	>	* get returns the correct element at the given key,
283	>	* or null if not present
284		*/
285		public void testGet() {
286		ConcurrentHashMap map = map5();
287	<	assertEquals("A", (String)map.get(one));
287	>	assertEquals("A", (String)map.get(one));
288		ConcurrentHashMap empty = new ConcurrentHashMap();
289		assertNull(map.get("anything"));
290		}
291
292		/**
293	<	*  isEmpty is true of empty map and false for non-empty
293	>	* isEmpty is true of empty map and false for non-empty
294		*/
295		public void testIsEmpty() {
296		ConcurrentHashMap empty = new ConcurrentHashMap();
297		ConcurrentHashMap map = map5();
298	<	assertTrue(empty.isEmpty());
298	>	assertTrue(empty.isEmpty());
299		assertFalse(map.isEmpty());
300		}
301
302		/**
303	<	*   keys returns an enumeration containing all the keys from the map
303	>	* keys returns an enumeration containing all the keys from the map
304		*/
305		public void testKeys() {
306		ConcurrentHashMap map = map5();
307	<	Enumeration e = map.keys();
308	<	int count = 0;
309	<	while(e.hasMoreElements()){
310	<	count++;
311	<	e.nextElement();
312	<	}
313	<	assertEquals(5, count);
307	>	Enumeration e = map.keys();
308	>	int count = 0;
309	>	while (e.hasMoreElements()) {
310	>	count++;
311	>	e.nextElement();
312	>	}
313	>	assertEquals(5, count);
314		}
315
316		/**
317	<	*   keySet returns a Set containing all the keys
317	>	* keySet returns a Set containing all the keys
318		*/
319		public void testKeySet() {
320		ConcurrentHashMap map = map5();
321	<	Set s = map.keySet();
322	<	assertEquals(5, s.size());
323	<	assertTrue(s.contains(one));
324	<	assertTrue(s.contains(two));
325	<	assertTrue(s.contains(three));
326	<	assertTrue(s.contains(four));
327	<	assertTrue(s.contains(five));
321	>	Set s = map.keySet();
322	>	assertEquals(5, s.size());
323	>	assertTrue(s.contains(one));
324	>	assertTrue(s.contains(two));
325	>	assertTrue(s.contains(three));
326	>	assertTrue(s.contains(four));
327	>	assertTrue(s.contains(five));
328	>	}
329	>
330	>	/**
331	>	* keySet.toArray returns contains all keys
332	>	*/
333	>	public void testKeySetToArray() {
334	>	ConcurrentHashMap map = map5();
335	>	Set s = map.keySet();
336	>	Object[] ar = s.toArray();
337	>	assertTrue(s.containsAll(Arrays.asList(ar)));
338	>	assertEquals(5, ar.length);
339	>	ar[0] = m10;
340	>	assertFalse(s.containsAll(Arrays.asList(ar)));
341	>	}
342	>
343	>	/**
344	>	* Values.toArray contains all values
345	>	*/
346	>	public void testValuesToArray() {
347	>	ConcurrentHashMap map = map5();
348	>	Collection v = map.values();
349	>	Object[] ar = v.toArray();
350	>	ArrayList s = new ArrayList(Arrays.asList(ar));
351	>	assertEquals(5, ar.length);
352	>	assertTrue(s.contains("A"));
353	>	assertTrue(s.contains("B"));
354	>	assertTrue(s.contains("C"));
355	>	assertTrue(s.contains("D"));
356	>	assertTrue(s.contains("E"));
357	>	}
358	>
359	>	/**
360	>	* entrySet.toArray contains all entries
361	>	*/
362	>	public void testEntrySetToArray() {
363	>	ConcurrentHashMap map = map5();
364	>	Set s = map.entrySet();
365	>	Object[] ar = s.toArray();
366	>	assertEquals(5, ar.length);
367	>	for (int i = 0; i < 5; ++i) {
368	>	assertTrue(map.containsKey(((Map.Entry)(ar[i])).getKey()));
369	>	assertTrue(map.containsValue(((Map.Entry)(ar[i])).getValue()));
370	>	}
371		}
372
373		/**
#	Line 154 | Line 375 | public class ConcurrentHashMapTest exten
375		*/
376		public void testValues() {
377		ConcurrentHashMap map = map5();
378	<	Collection s = map.values();
379	<	assertEquals(5, s.size());
380	<	assertTrue(s.contains("A"));
381	<	assertTrue(s.contains("B"));
382	<	assertTrue(s.contains("C"));
383	<	assertTrue(s.contains("D"));
384	<	assertTrue(s.contains("E"));
378	>	Collection s = map.values();
379	>	assertEquals(5, s.size());
380	>	assertTrue(s.contains("A"));
381	>	assertTrue(s.contains("B"));
382	>	assertTrue(s.contains("C"));
383	>	assertTrue(s.contains("D"));
384	>	assertTrue(s.contains("E"));
385		}
386
387		/**
#	Line 168 | Line 389 | public class ConcurrentHashMapTest exten
389		*/
390		public void testEntrySet() {
391		ConcurrentHashMap map = map5();
392	<	Set s = map.entrySet();
393	<	assertEquals(5, s.size());
392	>	Set s = map.entrySet();
393	>	assertEquals(5, s.size());
394		Iterator it = s.iterator();
395		while (it.hasNext()) {
396		Map.Entry e = (Map.Entry) it.next();
397	<	assertTrue(
397	>	assertTrue(
398		(e.getKey().equals(one) && e.getValue().equals("A")) ||
399		(e.getKey().equals(two) && e.getValue().equals("B")) ||
400		(e.getKey().equals(three) && e.getValue().equals("C")) ||
#	Line 183 | Line 404 | public class ConcurrentHashMapTest exten
404		}
405
406		/**
407	<	*   putAll  adds all key-value pairs from the given map
407	>	* putAll adds all key-value pairs from the given map
408		*/
409		public void testPutAll() {
410		ConcurrentHashMap empty = new ConcurrentHashMap();
411		ConcurrentHashMap map = map5();
412	<	empty.putAll(map);
413	<	assertEquals(5, empty.size());
414	<	assertTrue(empty.containsKey(one));
415	<	assertTrue(empty.containsKey(two));
416	<	assertTrue(empty.containsKey(three));
417	<	assertTrue(empty.containsKey(four));
418	<	assertTrue(empty.containsKey(five));
412	>	empty.putAll(map);
413	>	assertEquals(5, empty.size());
414	>	assertTrue(empty.containsKey(one));
415	>	assertTrue(empty.containsKey(two));
416	>	assertTrue(empty.containsKey(three));
417	>	assertTrue(empty.containsKey(four));
418	>	assertTrue(empty.containsKey(five));
419		}
420
421		/**
422	<	*   putIfAbsent works when the given key is not present
422	>	* putIfAbsent works when the given key is not present
423		*/
424		public void testPutIfAbsent() {
425		ConcurrentHashMap map = map5();
426	<	map.putIfAbsent(six, "Z");
426	>	map.putIfAbsent(six, "Z");
427		assertTrue(map.containsKey(six));
428		}
429
430		/**
431	<	*   putIfAbsent does not add the pair if the key is already present
431	>	* putIfAbsent does not add the pair if the key is already present
432		*/
433		public void testPutIfAbsent2() {
434		ConcurrentHashMap map = map5();
#	Line 215 | Line 436 | public class ConcurrentHashMapTest exten
436		}
437
438		/**
439	<	*   replace fails when the given key is not present
439	>	* replace fails when the given key is not present
440		*/
441		public void testReplace() {
442		ConcurrentHashMap map = map5();
443	<	assertNull(map.replace(six, "Z"));
443	>	assertNull(map.replace(six, "Z"));
444		assertFalse(map.containsKey(six));
445		}
446
447		/**
448	<	*   replace succeeds if the key is already present
448	>	* replace succeeds if the key is already present
449		*/
450		public void testReplace2() {
451		ConcurrentHashMap map = map5();
#	Line 232 | Line 453 | public class ConcurrentHashMapTest exten
453		assertEquals("Z", map.get(one));
454		}
455
235	–
456		/**
457		* replace value fails when the given key not mapped to expected value
458		*/
459		public void testReplaceValue() {
460		ConcurrentHashMap map = map5();
461		assertEquals("A", map.get(one));
462	<	assertFalse(map.replace(one, "Z", "Z"));
462	>	assertFalse(map.replace(one, "Z", "Z"));
463		assertEquals("A", map.get(one));
464		}
465
#	Line 249 | Line 469 | public class ConcurrentHashMapTest exten
469		public void testReplaceValue2() {
470		ConcurrentHashMap map = map5();
471		assertEquals("A", map.get(one));
472	<	assertTrue(map.replace(one, "A", "Z"));
472	>	assertTrue(map.replace(one, "A", "Z"));
473		assertEquals("Z", map.get(one));
474		}
475
256	–
476		/**
477	<	*   remove removes the correct key-value pair from the map
477	>	* remove removes the correct key-value pair from the map
478		*/
479		public void testRemove() {
480		ConcurrentHashMap map = map5();
481	<	map.remove(five);
482	<	assertEquals(4, map.size());
483	<	assertFalse(map.containsKey(five));
481	>	map.remove(five);
482	>	assertEquals(4, map.size());
483	>	assertFalse(map.containsKey(five));
484		}
485
486		/**
#	Line 269 | Line 488 | public class ConcurrentHashMapTest exten
488		*/
489		public void testRemove2() {
490		ConcurrentHashMap map = map5();
491	<	map.remove(five, "E");
492	<	assertEquals(4, map.size());
493	<	assertFalse(map.containsKey(five));
494	<	map.remove(four, "A");
495	<	assertEquals(4, map.size());
496	<	assertTrue(map.containsKey(four));
278	<
491	>	map.remove(five, "E");
492	>	assertEquals(4, map.size());
493	>	assertFalse(map.containsKey(five));
494	>	map.remove(four, "A");
495	>	assertEquals(4, map.size());
496	>	assertTrue(map.containsKey(four));
497		}
498
499		/**
500	<	*   size returns the correct values
500	>	* size returns the correct values
501		*/
502		public void testSize() {
503		ConcurrentHashMap map = map5();
504		ConcurrentHashMap empty = new ConcurrentHashMap();
505	<	assertEquals(0, empty.size());
506	<	assertEquals(5, map.size());
505	>	assertEquals(0, empty.size());
506	>	assertEquals(5, map.size());
507		}
508
509		/**
#	Line 295 | Line 513 | public class ConcurrentHashMapTest exten
513		ConcurrentHashMap map = map5();
514		String s = map.toString();
515		for (int i = 1; i <= 5; ++i) {
516	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
516	>	assertTrue(s.contains(String.valueOf(i)));
517		}
518	<	}
518	>	}
519
520		// Exception tests
521	<
521	>
522		/**
523	<	* Cannot create with negative capacity
523	>	* Cannot create with only negative capacity
524		*/
525		public void testConstructor1() {
526		try {
527	<	new ConcurrentHashMap(-1,0,1);
527	>	new ConcurrentHashMap(-1);
528		shouldThrow();
529	<	} catch(IllegalArgumentException e){}
529	>	} catch (IllegalArgumentException success) {}
530		}
531
532		/**
533	<	* Cannot create with negative concurrency level
534	<	*/
533	>	* Constructor (initialCapacity, loadFactor) throws
534	>	* IllegalArgumentException if either argument is negative
535	>	*/
536		public void testConstructor2() {
537		try {
538	<	new ConcurrentHashMap(1,0,-1);
538	>	new ConcurrentHashMap(-1, .75f);
539	>	shouldThrow();
540	>	} catch (IllegalArgumentException e) {}
541	>
542	>	try {
543	>	new ConcurrentHashMap(16, -1);
544		shouldThrow();
545	<	} catch(IllegalArgumentException e){}
545	>	} catch (IllegalArgumentException e) {}
546		}
547
548		/**
549	<	* Cannot create with only negative capacity
549	>	* Constructor (initialCapacity, loadFactor, concurrencyLevel)
550	>	* throws IllegalArgumentException if any argument is negative
551		*/
552		public void testConstructor3() {
553		try {
554	<	new ConcurrentHashMap(-1);
554	>	new ConcurrentHashMap(-1, .75f, 1);
555	>	shouldThrow();
556	>	} catch (IllegalArgumentException e) {}
557	>
558	>	try {
559	>	new ConcurrentHashMap(16, -1, 1);
560		shouldThrow();
561	<	} catch(IllegalArgumentException e){}
561	>	} catch (IllegalArgumentException e) {}
562	>
563	>	try {
564	>	new ConcurrentHashMap(16, .75f, -1);
565	>	shouldThrow();
566	>	} catch (IllegalArgumentException e) {}
567	>	}
568	>
569	>	/**
570	>	* ConcurrentHashMap(map) throws NullPointerException if the given
571	>	* map is null
572	>	*/
573	>	public void testConstructor4() {
574	>	try {
575	>	new ConcurrentHashMap(null);
576	>	shouldThrow();
577	>	} catch (NullPointerException e) {}
578	>	}
579	>
580	>	/**
581	>	* ConcurrentHashMap(map) creates a new map with the same mappings
582	>	* as the given map
583	>	*/
584	>	public void testConstructor5() {
585	>	ConcurrentHashMap map1 = map5();
586	>	ConcurrentHashMap map2 = new ConcurrentHashMap(map5());
587	>	assertTrue(map2.equals(map1));
588	>	map2.put(one, "F");
589	>	assertFalse(map2.equals(map1));
590		}
591
592	+
593		/**
594		* get(null) throws NPE
595		*/
#	Line 339 | Line 598 | public class ConcurrentHashMapTest exten
598		ConcurrentHashMap c = new ConcurrentHashMap(5);
599		c.get(null);
600		shouldThrow();
601	<	} catch(NullPointerException e){}
601	>	} catch (NullPointerException success) {}
602		}
603
604		/**
#	Line 350 | Line 609 | public class ConcurrentHashMapTest exten
609		ConcurrentHashMap c = new ConcurrentHashMap(5);
610		c.containsKey(null);
611		shouldThrow();
612	<	} catch(NullPointerException e){}
612	>	} catch (NullPointerException success) {}
613		}
614
615		/**
#	Line 361 | Line 620 | public class ConcurrentHashMapTest exten
620		ConcurrentHashMap c = new ConcurrentHashMap(5);
621		c.containsValue(null);
622		shouldThrow();
623	<	} catch(NullPointerException e){}
623	>	} catch (NullPointerException success) {}
624		}
625
626		/**
#	Line 372 | Line 631 | public class ConcurrentHashMapTest exten
631		ConcurrentHashMap c = new ConcurrentHashMap(5);
632		c.contains(null);
633		shouldThrow();
634	<	} catch(NullPointerException e){}
634	>	} catch (NullPointerException success) {}
635		}
636
637		/**
#	Line 383 | Line 642 | public class ConcurrentHashMapTest exten
642		ConcurrentHashMap c = new ConcurrentHashMap(5);
643		c.put(null, "whatever");
644		shouldThrow();
645	<	} catch(NullPointerException e){}
645	>	} catch (NullPointerException success) {}
646		}
647
648		/**
#	Line 394 | Line 653 | public class ConcurrentHashMapTest exten
653		ConcurrentHashMap c = new ConcurrentHashMap(5);
654		c.put("whatever", null);
655		shouldThrow();
656	<	} catch(NullPointerException e){}
656	>	} catch (NullPointerException success) {}
657		}
658
659		/**
#	Line 405 | Line 664 | public class ConcurrentHashMapTest exten
664		ConcurrentHashMap c = new ConcurrentHashMap(5);
665		c.putIfAbsent(null, "whatever");
666		shouldThrow();
667	<	} catch(NullPointerException e){}
667	>	} catch (NullPointerException success) {}
668		}
669
670		/**
#	Line 416 | Line 675 | public class ConcurrentHashMapTest exten
675		ConcurrentHashMap c = new ConcurrentHashMap(5);
676		c.replace(null, "whatever");
677		shouldThrow();
678	<	} catch(NullPointerException e){}
678	>	} catch (NullPointerException success) {}
679		}
680
681		/**
#	Line 427 | Line 686 | public class ConcurrentHashMapTest exten
686		ConcurrentHashMap c = new ConcurrentHashMap(5);
687		c.replace(null, one, "whatever");
688		shouldThrow();
689	<	} catch(NullPointerException e){}
689	>	} catch (NullPointerException success) {}
690		}
691
692		/**
#	Line 438 | Line 697 | public class ConcurrentHashMapTest exten
697		ConcurrentHashMap c = new ConcurrentHashMap(5);
698		c.putIfAbsent("whatever", null);
699		shouldThrow();
700	<	} catch(NullPointerException e){}
700	>	} catch (NullPointerException success) {}
701		}
702
444	–
703		/**
704		* replace(x, null) throws NPE
705		*/
#	Line 450 | Line 708 | public class ConcurrentHashMapTest exten
708		ConcurrentHashMap c = new ConcurrentHashMap(5);
709		c.replace("whatever", null);
710		shouldThrow();
711	<	} catch(NullPointerException e){}
711	>	} catch (NullPointerException success) {}
712		}
713
714		/**
#	Line 461 | Line 719 | public class ConcurrentHashMapTest exten
719		ConcurrentHashMap c = new ConcurrentHashMap(5);
720		c.replace("whatever", null, "A");
721		shouldThrow();
722	<	} catch(NullPointerException e){}
722	>	} catch (NullPointerException success) {}
723		}
724
725		/**
#	Line 472 | Line 730 | public class ConcurrentHashMapTest exten
730		ConcurrentHashMap c = new ConcurrentHashMap(5);
731		c.replace("whatever", one, null);
732		shouldThrow();
733	<	} catch(NullPointerException e){}
733	>	} catch (NullPointerException success) {}
734		}
735
478	–
736		/**
737		* remove(null) throws NPE
738		*/
#	Line 485 | Line 742 | public class ConcurrentHashMapTest exten
742		c.put("sadsdf", "asdads");
743		c.remove(null);
744		shouldThrow();
745	<	} catch(NullPointerException e){}
745	>	} catch (NullPointerException success) {}
746		}
747
748		/**
#	Line 497 | Line 754 | public class ConcurrentHashMapTest exten
754		c.put("sadsdf", "asdads");
755		c.remove(null, "whatever");
756		shouldThrow();
757	<	} catch(NullPointerException e){}
757	>	} catch (NullPointerException success) {}
758		}
759
760		/**
761	<	* A deserialized map equals original
761	>	* remove(x, null) returns false
762		*/
763	<	public void testSerialization() {
764	<	ConcurrentHashMap q = map5();
765	<
766	<	try {
510	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
511	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
512	<	out.writeObject(q);
513	<	out.close();
514	<
515	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
516	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
517	<	ConcurrentHashMap r = (ConcurrentHashMap)in.readObject();
518	<	assertEquals(q.size(), r.size());
519	<	assertTrue(q.equals(r));
520	<	assertTrue(r.equals(q));
521	<	} catch(Exception e){
522	<	e.printStackTrace();
523	<	unexpectedException();
524	<	}
763	>	public void testRemove3() {
764	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
765	>	c.put("sadsdf", "asdads");
766	>	assertFalse(c.remove("sadsdf", null));
767		}
768
769	+	/**
770	+	* A deserialized map equals original
771	+	*/
772	+	public void testSerialization() throws Exception {
773	+	Map x = map5();
774	+	Map y = serialClone(x);
775	+
776	+	assertNotSame(x, y);
777	+	assertEquals(x.size(), y.size());
778	+	assertEquals(x, y);
779	+	assertEquals(y, x);
780	+	}
781
782		/**
783		* SetValue of an EntrySet entry sets value in the map.
784		*/
785		public void testSetValueWriteThrough() {
786	<	// Adapted from a bug report by Eric Zoerner
786	>	// Adapted from a bug report by Eric Zoerner
787		ConcurrentHashMap map = new ConcurrentHashMap(2, 5.0f, 1);
788		assertTrue(map.isEmpty());
789		for (int i = 0; i < 20; i++)
790		map.put(new Integer(i), new Integer(i));
791		assertFalse(map.isEmpty());
792		Map.Entry entry1 = (Map.Entry)map.entrySet().iterator().next();
793	<
794	<	// assert that entry1 is not 16
795	<	assertTrue("entry is 16, test not valid",
796	<	!entry1.getKey().equals(new Integer(16)));
797	<
798	<	// remove 16 (a different key) from map
799	<	// which just happens to cause entry1 to be cloned in map
800	<	map.remove(new Integer(16));
801	<	entry1.setValue("XYZ");
548	<	assertTrue(map.containsValue("XYZ")); // fails
793	>	// Unless it happens to be first (in which case remainder of
794	>	// test is skipped), remove a possibly-colliding key from map
795	>	// which, under some implementations, may cause entry1 to be
796	>	// cloned in map
797	>	if (!entry1.getKey().equals(new Integer(16))) {
798	>	map.remove(new Integer(16));
799	>	entry1.setValue("XYZ");
800	>	assertTrue(map.containsValue("XYZ")); // fails if write-through broken
801	>	}
802		}
803	<
803	>
804		}

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