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Comparing jsr166/src/test/tck/ConcurrentHashMapTest.java (file contents):
Revision 1.10 by dl, Wed Jun 2 23:49:34 2004 UTC vs.
Revision 1.50 by jsr166, Mon Aug 22 18:38:28 2016 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	>	import java.util.concurrent.ExecutorService;
20	>	import java.util.concurrent.Executors;
21
22	<	public class ConcurrentHashMapTest extends JSR166TestCase{
22	>	import junit.framework.Test;
23	>	import junit.framework.TestSuite;
24	>
25	>	public class ConcurrentHashMapTest extends JSR166TestCase {
26		public static void main(String[] args) {
27	<	junit.textui.TestRunner.run (suite());
27	>	main(suite(), args);
28		}
29		public static Test suite() {
30	<	return new TestSuite(ConcurrentHashMapTest.class);
30	>	return new TestSuite(ConcurrentHashMapTest.class);
31		}
32
33		/**
34	<	* Create a map from Integers 1-5 to Strings "A"-"E".
34	>	* Returns a new map from Integers 1-5 to Strings "A"-"E".
35		*/
36	<	private static ConcurrentHashMap map5() {
37	<	ConcurrentHashMap map = new ConcurrentHashMap(5);
36	>	private static ConcurrentHashMap<Integer, String> map5() {
37	>	ConcurrentHashMap map = new ConcurrentHashMap<Integer, String>(5);
38		assertTrue(map.isEmpty());
39	<	map.put(one, "A");
40	<	map.put(two, "B");
41	<	map.put(three, "C");
42	<	map.put(four, "D");
43	<	map.put(five, "E");
39	>	map.put(one, "A");
40	>	map.put(two, "B");
41	>	map.put(three, "C");
42	>	map.put(four, "D");
43	>	map.put(five, "E");
44		assertFalse(map.isEmpty());
45		assertEquals(5, map.size());
46	<	return map;
46	>	return map;
47	>	}
48	>
49	>	/** Re-implement Integer.compare for old java versions */
50	>	static int compare(int x, int y) {
51	>	return (x < y) ? -1 : (x > y) ? 1 : 0;
52	>	}
53	>
54	>	// classes for testing Comparable fallbacks
55	>	static class BI implements Comparable<BI> {
56	>	private final int value;
57	>	BI(int value) { this.value = value; }
58	>	public int compareTo(BI other) {
59	>	return compare(value, other.value);
60	>	}
61	>	public boolean equals(Object x) {
62	>	return (x instanceof BI) && ((BI)x).value == value;
63	>	}
64	>	public int hashCode() { return 42; }
65	>	}
66	>	static class CI extends BI { CI(int value) { super(value); } }
67	>	static class DI extends BI { DI(int value) { super(value); } }
68	>
69	>	static class BS implements Comparable<BS> {
70	>	private final String value;
71	>	BS(String value) { this.value = value; }
72	>	public int compareTo(BS other) {
73	>	return value.compareTo(other.value);
74	>	}
75	>	public boolean equals(Object x) {
76	>	return (x instanceof BS) && value.equals(((BS)x).value);
77	>	}
78	>	public int hashCode() { return 42; }
79	>	}
80	>
81	>	static class LexicographicList<E extends Comparable<E>> extends ArrayList<E>
82	>	implements Comparable<LexicographicList<E>> {
83	>	LexicographicList(Collection<E> c) { super(c); }
84	>	LexicographicList(E e) { super(Collections.singleton(e)); }
85	>	public int compareTo(LexicographicList<E> other) {
86	>	int common = Math.min(size(), other.size());
87	>	int r = 0;
88	>	for (int i = 0; i < common; i++) {
89	>	if ((r = get(i).compareTo(other.get(i))) != 0)
90	>	break;
91	>	}
92	>	if (r == 0)
93	>	r = compare(size(), other.size());
94	>	return r;
95	>	}
96	>	private static final long serialVersionUID = 0;
97	>	}
98	>
99	>	static class CollidingObject {
100	>	final String value;
101	>	CollidingObject(final String value) { this.value = value; }
102	>	public int hashCode() { return this.value.hashCode() & 1; }
103	>	public boolean equals(final Object obj) {
104	>	return (obj instanceof CollidingObject) && ((CollidingObject)obj).value.equals(value);
105	>	}
106	>	}
107	>
108	>	static class ComparableCollidingObject extends CollidingObject implements Comparable<ComparableCollidingObject> {
109	>	ComparableCollidingObject(final String value) { super(value); }
110	>	public int compareTo(final ComparableCollidingObject o) {
111	>	return value.compareTo(o.value);
112	>	}
113	>	}
114	>
115	>	/**
116	>	* Inserted elements that are subclasses of the same Comparable
117	>	* class are found.
118	>	*/
119	>	public void testComparableFamily() {
120	>	int size = 500;         // makes measured test run time -> 60ms
121	>	ConcurrentHashMap<BI, Boolean> m =
122	>	new ConcurrentHashMap<BI, Boolean>();
123	>	for (int i = 0; i < size; i++) {
124	>	assertTrue(m.put(new CI(i), true) == null);
125	>	}
126	>	for (int i = 0; i < size; i++) {
127	>	assertTrue(m.containsKey(new CI(i)));
128	>	assertTrue(m.containsKey(new DI(i)));
129	>	}
130		}
131
132		/**
133	<	*  clear removes all pairs
133	>	* Elements of classes with erased generic type parameters based
134	>	* on Comparable can be inserted and found.
135	>	*/
136	>	public void testGenericComparable() {
137	>	int size = 120;         // makes measured test run time -> 60ms
138	>	ConcurrentHashMap<Object, Boolean> m =
139	>	new ConcurrentHashMap<Object, Boolean>();
140	>	for (int i = 0; i < size; i++) {
141	>	BI bi = new BI(i);
142	>	BS bs = new BS(String.valueOf(i));
143	>	LexicographicList<BI> bis = new LexicographicList<BI>(bi);
144	>	LexicographicList<BS> bss = new LexicographicList<BS>(bs);
145	>	assertTrue(m.putIfAbsent(bis, true) == null);
146	>	assertTrue(m.containsKey(bis));
147	>	if (m.putIfAbsent(bss, true) == null)
148	>	assertTrue(m.containsKey(bss));
149	>	assertTrue(m.containsKey(bis));
150	>	}
151	>	for (int i = 0; i < size; i++) {
152	>	assertTrue(m.containsKey(Collections.singletonList(new BI(i))));
153	>	}
154	>	}
155	>
156	>	/**
157	>	* Elements of non-comparable classes equal to those of classes
158	>	* with erased generic type parameters based on Comparable can be
159	>	* inserted and found.
160	>	*/
161	>	public void testGenericComparable2() {
162	>	int size = 500;         // makes measured test run time -> 60ms
163	>	ConcurrentHashMap<Object, Boolean> m =
164	>	new ConcurrentHashMap<Object, Boolean>();
165	>	for (int i = 0; i < size; i++) {
166	>	m.put(Collections.singletonList(new BI(i)), true);
167	>	}
168	>
169	>	for (int i = 0; i < size; i++) {
170	>	LexicographicList<BI> bis = new LexicographicList<BI>(new BI(i));
171	>	assertTrue(m.containsKey(bis));
172	>	}
173	>	}
174	>
175	>	/**
176	>	* Mixtures of instances of comparable and non-comparable classes
177	>	* can be inserted and found.
178	>	*/
179	>	public void testMixedComparable() {
180	>	int size = 1200;        // makes measured test run time -> 35ms
181	>	ConcurrentHashMap<Object, Object> map =
182	>	new ConcurrentHashMap<Object, Object>();
183	>	Random rng = new Random();
184	>	for (int i = 0; i < size; i++) {
185	>	Object x;
186	>	switch (rng.nextInt(4)) {
187	>	case 0:
188	>	x = new Object();
189	>	break;
190	>	case 1:
191	>	x = new CollidingObject(Integer.toString(i));
192	>	break;
193	>	default:
194	>	x = new ComparableCollidingObject(Integer.toString(i));
195	>	}
196	>	assertNull(map.put(x, x));
197	>	}
198	>	int count = 0;
199	>	for (Object k : map.keySet()) {
200	>	assertEquals(map.get(k), k);
201	>	++count;
202	>	}
203	>	assertEquals(count, size);
204	>	assertEquals(map.size(), size);
205	>	for (Object k : map.keySet()) {
206	>	assertEquals(map.put(k, k), k);
207	>	}
208	>	}
209	>
210	>	/**
211	>	* clear removes all pairs
212		*/
213		public void testClear() {
214		ConcurrentHashMap map = map5();
215	<	map.clear();
216	<	assertEquals(map.size(), 0);
215	>	map.clear();
216	>	assertEquals(0, map.size());
217		}
218
219		/**
220	<	*  Maps with same contents are equal
220	>	* Maps with same contents are equal
221		*/
222		public void testEquals() {
223		ConcurrentHashMap map1 = map5();
224		ConcurrentHashMap map2 = map5();
225		assertEquals(map1, map2);
226		assertEquals(map2, map1);
227	<	map1.clear();
227	>	map1.clear();
228		assertFalse(map1.equals(map2));
229		assertFalse(map2.equals(map1));
230		}
231
232		/**
233	<	*  contains returns true for contained value
233	>	* hashCode() equals sum of each key.hashCode ^ value.hashCode
234	>	*/
235	>	public void testHashCode() {
236	>	ConcurrentHashMap<Integer,String> map = map5();
237	>	int sum = 0;
238	>	for (Map.Entry<Integer,String> e : map.entrySet())
239	>	sum += e.getKey().hashCode() ^ e.getValue().hashCode();
240	>	assertEquals(sum, map.hashCode());
241	>	}
242	>
243	>	/**
244	>	* contains returns true for contained value
245		*/
246		public void testContains() {
247		ConcurrentHashMap map = map5();
248	<	assertTrue(map.contains("A"));
248	>	assertTrue(map.contains("A"));
249		assertFalse(map.contains("Z"));
250		}
251	<
251	>
252		/**
253	<	*  containsKey returns true for contained key
253	>	* containsKey returns true for contained key
254		*/
255		public void testContainsKey() {
256		ConcurrentHashMap map = map5();
257	<	assertTrue(map.containsKey(one));
257	>	assertTrue(map.containsKey(one));
258		assertFalse(map.containsKey(zero));
259		}
260
261		/**
262	<	*  containsValue returns true for held values
262	>	* containsValue returns true for held values
263		*/
264		public void testContainsValue() {
265		ConcurrentHashMap map = map5();
266	<	assertTrue(map.contains("A"));
267	<	assertFalse(map.contains("Z"));
266	>	assertTrue(map.containsValue("A"));
267	>	assertFalse(map.containsValue("Z"));
268		}
269
270		/**
271	<	*   enumeration returns an enumeration containing the correct
272	<	*   elements
271	>	* enumeration returns an enumeration containing the correct
272	>	* elements
273		*/
274		public void testEnumeration() {
275		ConcurrentHashMap map = map5();
276	<	Enumeration e = map.elements();
277	<	int count = 0;
278	<	while(e.hasMoreElements()){
279	<	count++;
280	<	e.nextElement();
281	<	}
282	<	assertEquals(5, count);
276	>	Enumeration e = map.elements();
277	>	int count = 0;
278	>	while (e.hasMoreElements()) {
279	>	count++;
280	>	e.nextElement();
281	>	}
282	>	assertEquals(5, count);
283		}
284
285		/**
286	<	*  get returns the correct element at the given key,
287	<	*  or null if not present
286	>	* get returns the correct element at the given key,
287	>	* or null if not present
288		*/
289		public void testGet() {
290		ConcurrentHashMap map = map5();
291	<	assertEquals("A", (String)map.get(one));
291	>	assertEquals("A", (String)map.get(one));
292		ConcurrentHashMap empty = new ConcurrentHashMap();
293		assertNull(map.get("anything"));
294	+	assertNull(empty.get("anything"));
295		}
296
297		/**
298	<	*  isEmpty is true of empty map and false for non-empty
298	>	* isEmpty is true of empty map and false for non-empty
299		*/
300		public void testIsEmpty() {
301		ConcurrentHashMap empty = new ConcurrentHashMap();
302		ConcurrentHashMap map = map5();
303	<	assertTrue(empty.isEmpty());
303	>	assertTrue(empty.isEmpty());
304		assertFalse(map.isEmpty());
305		}
306
307		/**
308	<	*   keys returns an enumeration containing all the keys from the map
308	>	* keys returns an enumeration containing all the keys from the map
309		*/
310		public void testKeys() {
311		ConcurrentHashMap map = map5();
312	<	Enumeration e = map.keys();
313	<	int count = 0;
314	<	while(e.hasMoreElements()){
315	<	count++;
316	<	e.nextElement();
317	<	}
318	<	assertEquals(5, count);
312	>	Enumeration e = map.keys();
313	>	int count = 0;
314	>	while (e.hasMoreElements()) {
315	>	count++;
316	>	e.nextElement();
317	>	}
318	>	assertEquals(5, count);
319		}
320
321		/**
322	<	*   keySet returns a Set containing all the keys
322	>	* keySet returns a Set containing all the keys
323		*/
324		public void testKeySet() {
325		ConcurrentHashMap map = map5();
326	<	Set s = map.keySet();
327	<	assertEquals(5, s.size());
328	<	assertTrue(s.contains(one));
329	<	assertTrue(s.contains(two));
330	<	assertTrue(s.contains(three));
331	<	assertTrue(s.contains(four));
332	<	assertTrue(s.contains(five));
326	>	Set s = map.keySet();
327	>	assertEquals(5, s.size());
328	>	assertTrue(s.contains(one));
329	>	assertTrue(s.contains(two));
330	>	assertTrue(s.contains(three));
331	>	assertTrue(s.contains(four));
332	>	assertTrue(s.contains(five));
333	>	}
334	>
335	>	/**
336	>	* Test keySet().removeAll on empty map
337	>	*/
338	>	public void testKeySet_empty_removeAll() {
339	>	ConcurrentHashMap<Integer, String> map = new ConcurrentHashMap<>();
340	>	Set<Integer> set = map.keySet();
341	>	set.removeAll(Collections.emptyList());
342	>	assertTrue(map.isEmpty());
343	>	assertTrue(set.isEmpty());
344	>	// following is test for JDK-8163353
345	>	set.removeAll(Collections.emptySet());
346	>	assertTrue(map.isEmpty());
347	>	assertTrue(set.isEmpty());
348	>	}
349	>
350	>	/**
351	>	* keySet.toArray returns contains all keys
352	>	*/
353	>	public void testKeySetToArray() {
354	>	ConcurrentHashMap map = map5();
355	>	Set s = map.keySet();
356	>	Object[] ar = s.toArray();
357	>	assertTrue(s.containsAll(Arrays.asList(ar)));
358	>	assertEquals(5, ar.length);
359	>	ar[0] = m10;
360	>	assertFalse(s.containsAll(Arrays.asList(ar)));
361	>	}
362	>
363	>	/**
364	>	* Values.toArray contains all values
365	>	*/
366	>	public void testValuesToArray() {
367	>	ConcurrentHashMap map = map5();
368	>	Collection v = map.values();
369	>	Object[] ar = v.toArray();
370	>	ArrayList s = new ArrayList(Arrays.asList(ar));
371	>	assertEquals(5, ar.length);
372	>	assertTrue(s.contains("A"));
373	>	assertTrue(s.contains("B"));
374	>	assertTrue(s.contains("C"));
375	>	assertTrue(s.contains("D"));
376	>	assertTrue(s.contains("E"));
377	>	}
378	>
379	>	/**
380	>	* entrySet.toArray contains all entries
381	>	*/
382	>	public void testEntrySetToArray() {
383	>	ConcurrentHashMap map = map5();
384	>	Set s = map.entrySet();
385	>	Object[] ar = s.toArray();
386	>	assertEquals(5, ar.length);
387	>	for (int i = 0; i < 5; ++i) {
388	>	assertTrue(map.containsKey(((Map.Entry)(ar[i])).getKey()));
389	>	assertTrue(map.containsValue(((Map.Entry)(ar[i])).getValue()));
390	>	}
391		}
392
393		/**
#	Line 154 | Line 395 | public class ConcurrentHashMapTest exten
395		*/
396		public void testValues() {
397		ConcurrentHashMap map = map5();
398	<	Collection s = map.values();
399	<	assertEquals(5, s.size());
400	<	assertTrue(s.contains("A"));
401	<	assertTrue(s.contains("B"));
402	<	assertTrue(s.contains("C"));
403	<	assertTrue(s.contains("D"));
404	<	assertTrue(s.contains("E"));
398	>	Collection s = map.values();
399	>	assertEquals(5, s.size());
400	>	assertTrue(s.contains("A"));
401	>	assertTrue(s.contains("B"));
402	>	assertTrue(s.contains("C"));
403	>	assertTrue(s.contains("D"));
404	>	assertTrue(s.contains("E"));
405		}
406
407		/**
#	Line 168 | Line 409 | public class ConcurrentHashMapTest exten
409		*/
410		public void testEntrySet() {
411		ConcurrentHashMap map = map5();
412	<	Set s = map.entrySet();
413	<	assertEquals(5, s.size());
412	>	Set s = map.entrySet();
413	>	assertEquals(5, s.size());
414		Iterator it = s.iterator();
415		while (it.hasNext()) {
416		Map.Entry e = (Map.Entry) it.next();
417	<	assertTrue(
417	>	assertTrue(
418		(e.getKey().equals(one) && e.getValue().equals("A")) ||
419		(e.getKey().equals(two) && e.getValue().equals("B")) ||
420		(e.getKey().equals(three) && e.getValue().equals("C")) ||
#	Line 183 | Line 424 | public class ConcurrentHashMapTest exten
424		}
425
426		/**
427	<	*   putAll  adds all key-value pairs from the given map
427	>	* putAll adds all key-value pairs from the given map
428		*/
429		public void testPutAll() {
430		ConcurrentHashMap empty = new ConcurrentHashMap();
431		ConcurrentHashMap map = map5();
432	<	empty.putAll(map);
433	<	assertEquals(5, empty.size());
434	<	assertTrue(empty.containsKey(one));
435	<	assertTrue(empty.containsKey(two));
436	<	assertTrue(empty.containsKey(three));
437	<	assertTrue(empty.containsKey(four));
438	<	assertTrue(empty.containsKey(five));
432	>	empty.putAll(map);
433	>	assertEquals(5, empty.size());
434	>	assertTrue(empty.containsKey(one));
435	>	assertTrue(empty.containsKey(two));
436	>	assertTrue(empty.containsKey(three));
437	>	assertTrue(empty.containsKey(four));
438	>	assertTrue(empty.containsKey(five));
439		}
440
441		/**
442	<	*   putIfAbsent works when the given key is not present
442	>	* putIfAbsent works when the given key is not present
443		*/
444		public void testPutIfAbsent() {
445		ConcurrentHashMap map = map5();
446	<	map.putIfAbsent(six, "Z");
446	>	map.putIfAbsent(six, "Z");
447		assertTrue(map.containsKey(six));
448		}
449
450		/**
451	<	*   putIfAbsent does not add the pair if the key is already present
451	>	* putIfAbsent does not add the pair if the key is already present
452		*/
453		public void testPutIfAbsent2() {
454		ConcurrentHashMap map = map5();
#	Line 215 | Line 456 | public class ConcurrentHashMapTest exten
456		}
457
458		/**
459	<	*   replace fails when the given key is not present
459	>	* replace fails when the given key is not present
460		*/
461		public void testReplace() {
462		ConcurrentHashMap map = map5();
463	<	assertNull(map.replace(six, "Z"));
463	>	assertNull(map.replace(six, "Z"));
464		assertFalse(map.containsKey(six));
465		}
466
467		/**
468	<	*   replace succeeds if the key is already present
468	>	* replace succeeds if the key is already present
469		*/
470		public void testReplace2() {
471		ConcurrentHashMap map = map5();
#	Line 232 | Line 473 | public class ConcurrentHashMapTest exten
473		assertEquals("Z", map.get(one));
474		}
475
235	–
476		/**
477		* replace value fails when the given key not mapped to expected value
478		*/
479		public void testReplaceValue() {
480		ConcurrentHashMap map = map5();
481		assertEquals("A", map.get(one));
482	<	assertFalse(map.replace(one, "Z", "Z"));
482	>	assertFalse(map.replace(one, "Z", "Z"));
483		assertEquals("A", map.get(one));
484		}
485
#	Line 249 | Line 489 | public class ConcurrentHashMapTest exten
489		public void testReplaceValue2() {
490		ConcurrentHashMap map = map5();
491		assertEquals("A", map.get(one));
492	<	assertTrue(map.replace(one, "A", "Z"));
492	>	assertTrue(map.replace(one, "A", "Z"));
493		assertEquals("Z", map.get(one));
494		}
495
256	–
496		/**
497	<	*   remove removes the correct key-value pair from the map
497	>	* remove removes the correct key-value pair from the map
498		*/
499		public void testRemove() {
500		ConcurrentHashMap map = map5();
501	<	map.remove(five);
502	<	assertEquals(4, map.size());
503	<	assertFalse(map.containsKey(five));
501	>	map.remove(five);
502	>	assertEquals(4, map.size());
503	>	assertFalse(map.containsKey(five));
504		}
505
506		/**
#	Line 269 | Line 508 | public class ConcurrentHashMapTest exten
508		*/
509		public void testRemove2() {
510		ConcurrentHashMap map = map5();
511	<	map.remove(five, "E");
512	<	assertEquals(4, map.size());
513	<	assertFalse(map.containsKey(five));
514	<	map.remove(four, "A");
515	<	assertEquals(4, map.size());
516	<	assertTrue(map.containsKey(four));
278	<
511	>	map.remove(five, "E");
512	>	assertEquals(4, map.size());
513	>	assertFalse(map.containsKey(five));
514	>	map.remove(four, "A");
515	>	assertEquals(4, map.size());
516	>	assertTrue(map.containsKey(four));
517		}
518
519		/**
520	<	*   size returns the correct values
520	>	* size returns the correct values
521		*/
522		public void testSize() {
523		ConcurrentHashMap map = map5();
524		ConcurrentHashMap empty = new ConcurrentHashMap();
525	<	assertEquals(0, empty.size());
526	<	assertEquals(5, map.size());
525	>	assertEquals(0, empty.size());
526	>	assertEquals(5, map.size());
527		}
528
529		/**
#	Line 295 | Line 533 | public class ConcurrentHashMapTest exten
533		ConcurrentHashMap map = map5();
534		String s = map.toString();
535		for (int i = 1; i <= 5; ++i) {
536	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
536	>	assertTrue(s.contains(String.valueOf(i)));
537		}
538	<	}
538	>	}
539
540		// Exception tests
541	<
541	>
542		/**
543	<	* Cannot create with negative capacity
543	>	* Cannot create with only negative capacity
544		*/
545		public void testConstructor1() {
546		try {
547	<	new ConcurrentHashMap(-1,0,1);
547	>	new ConcurrentHashMap(-1);
548		shouldThrow();
549	<	} catch(IllegalArgumentException e){}
549	>	} catch (IllegalArgumentException success) {}
550		}
551
552		/**
553	<	* Cannot create with negative concurrency level
553	>	* Constructor (initialCapacity, loadFactor) throws
554	>	* IllegalArgumentException if either argument is negative
555		*/
556		public void testConstructor2() {
557		try {
558	<	new ConcurrentHashMap(1,0,-1);
558	>	new ConcurrentHashMap(-1, .75f);
559	>	shouldThrow();
560	>	} catch (IllegalArgumentException success) {}
561	>
562	>	try {
563	>	new ConcurrentHashMap(16, -1);
564		shouldThrow();
565	<	} catch(IllegalArgumentException e){}
565	>	} catch (IllegalArgumentException success) {}
566		}
567
568		/**
569	<	* Cannot create with only negative capacity
569	>	* Constructor (initialCapacity, loadFactor, concurrencyLevel)
570	>	* throws IllegalArgumentException if any argument is negative
571		*/
572		public void testConstructor3() {
573		try {
574	<	new ConcurrentHashMap(-1);
574	>	new ConcurrentHashMap(-1, .75f, 1);
575	>	shouldThrow();
576	>	} catch (IllegalArgumentException success) {}
577	>
578	>	try {
579	>	new ConcurrentHashMap(16, -1, 1);
580	>	shouldThrow();
581	>	} catch (IllegalArgumentException success) {}
582	>
583	>	try {
584	>	new ConcurrentHashMap(16, .75f, -1);
585	>	shouldThrow();
586	>	} catch (IllegalArgumentException success) {}
587	>	}
588	>
589	>	/**
590	>	* ConcurrentHashMap(map) throws NullPointerException if the given
591	>	* map is null
592	>	*/
593	>	public void testConstructor4() {
594	>	try {
595	>	new ConcurrentHashMap(null);
596		shouldThrow();
597	<	} catch(IllegalArgumentException e){}
597	>	} catch (NullPointerException success) {}
598	>	}
599	>
600	>	/**
601	>	* ConcurrentHashMap(map) creates a new map with the same mappings
602	>	* as the given map
603	>	*/
604	>	public void testConstructor5() {
605	>	ConcurrentHashMap map1 = map5();
606	>	ConcurrentHashMap map2 = new ConcurrentHashMap(map5());
607	>	assertTrue(map2.equals(map1));
608	>	map2.put(one, "F");
609	>	assertFalse(map2.equals(map1));
610		}
611
612		/**
613		* get(null) throws NPE
614		*/
615		public void testGet_NullPointerException() {
616	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
617		try {
339	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
618		c.get(null);
619		shouldThrow();
620	<	} catch(NullPointerException e){}
620	>	} catch (NullPointerException success) {}
621		}
622
623		/**
624		* containsKey(null) throws NPE
625		*/
626		public void testContainsKey_NullPointerException() {
627	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
628		try {
350	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
629		c.containsKey(null);
630		shouldThrow();
631	<	} catch(NullPointerException e){}
631	>	} catch (NullPointerException success) {}
632		}
633
634		/**
635		* containsValue(null) throws NPE
636		*/
637		public void testContainsValue_NullPointerException() {
638	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
639		try {
361	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
640		c.containsValue(null);
641		shouldThrow();
642	<	} catch(NullPointerException e){}
642	>	} catch (NullPointerException success) {}
643		}
644
645		/**
646		* contains(null) throws NPE
647		*/
648		public void testContains_NullPointerException() {
649	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
650		try {
372	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
651		c.contains(null);
652		shouldThrow();
653	<	} catch(NullPointerException e){}
653	>	} catch (NullPointerException success) {}
654		}
655
656		/**
657		* put(null,x) throws NPE
658		*/
659		public void testPut1_NullPointerException() {
660	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
661		try {
383	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
662		c.put(null, "whatever");
663		shouldThrow();
664	<	} catch(NullPointerException e){}
664	>	} catch (NullPointerException success) {}
665		}
666
667		/**
668		* put(x, null) throws NPE
669		*/
670		public void testPut2_NullPointerException() {
671	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
672		try {
394	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
673		c.put("whatever", null);
674		shouldThrow();
675	<	} catch(NullPointerException e){}
675	>	} catch (NullPointerException success) {}
676		}
677
678		/**
679		* putIfAbsent(null, x) throws NPE
680		*/
681		public void testPutIfAbsent1_NullPointerException() {
682	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
683		try {
405	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
684		c.putIfAbsent(null, "whatever");
685		shouldThrow();
686	<	} catch(NullPointerException e){}
686	>	} catch (NullPointerException success) {}
687		}
688
689		/**
690		* replace(null, x) throws NPE
691		*/
692		public void testReplace_NullPointerException() {
693	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
694		try {
416	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
695		c.replace(null, "whatever");
696		shouldThrow();
697	<	} catch(NullPointerException e){}
697	>	} catch (NullPointerException success) {}
698		}
699
700		/**
701		* replace(null, x, y) throws NPE
702		*/
703		public void testReplaceValue_NullPointerException() {
704	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
705		try {
427	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
706		c.replace(null, one, "whatever");
707		shouldThrow();
708	<	} catch(NullPointerException e){}
708	>	} catch (NullPointerException success) {}
709		}
710
711		/**
712		* putIfAbsent(x, null) throws NPE
713		*/
714		public void testPutIfAbsent2_NullPointerException() {
715	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
716		try {
438	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
717		c.putIfAbsent("whatever", null);
718		shouldThrow();
719	<	} catch(NullPointerException e){}
719	>	} catch (NullPointerException success) {}
720		}
721
444	–
722		/**
723		* replace(x, null) throws NPE
724		*/
725		public void testReplace2_NullPointerException() {
726	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
727		try {
450	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
728		c.replace("whatever", null);
729		shouldThrow();
730	<	} catch(NullPointerException e){}
730	>	} catch (NullPointerException success) {}
731		}
732
733		/**
734		* replace(x, null, y) throws NPE
735		*/
736		public void testReplaceValue2_NullPointerException() {
737	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
738		try {
461	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
739		c.replace("whatever", null, "A");
740		shouldThrow();
741	<	} catch(NullPointerException e){}
741	>	} catch (NullPointerException success) {}
742		}
743
744		/**
745		* replace(x, y, null) throws NPE
746		*/
747		public void testReplaceValue3_NullPointerException() {
748	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
749		try {
472	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
750		c.replace("whatever", one, null);
751		shouldThrow();
752	<	} catch(NullPointerException e){}
752	>	} catch (NullPointerException success) {}
753		}
754
478	–
755		/**
756		* remove(null) throws NPE
757		*/
758		public void testRemove1_NullPointerException() {
759	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
760	+	c.put("sadsdf", "asdads");
761		try {
484	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
485	–	c.put("sadsdf", "asdads");
762		c.remove(null);
763		shouldThrow();
764	<	} catch(NullPointerException e){}
764	>	} catch (NullPointerException success) {}
765		}
766
767		/**
768		* remove(null, x) throws NPE
769		*/
770		public void testRemove2_NullPointerException() {
771	+	ConcurrentHashMap c = new ConcurrentHashMap(5);
772	+	c.put("sadsdf", "asdads");
773		try {
496	–	ConcurrentHashMap c = new ConcurrentHashMap(5);
497	–	c.put("sadsdf", "asdads");
774		c.remove(null, "whatever");
775		shouldThrow();
776	<	} catch(NullPointerException e){}
776	>	} catch (NullPointerException success) {}
777		}
778
779		/**
780	<	* A deserialized map equals original
780	>	* remove(x, null) returns false
781		*/
782	<	public void testSerialization() {
783	<	ConcurrentHashMap q = map5();
784	<
785	<	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	<	}
782	>	public void testRemove3() {
783	>	ConcurrentHashMap c = new ConcurrentHashMap(5);
784	>	c.put("sadsdf", "asdads");
785	>	assertFalse(c.remove("sadsdf", null));
786		}
787
788	+	/**
789	+	* A deserialized map equals original
790	+	*/
791	+	public void testSerialization() throws Exception {
792	+	Map x = map5();
793	+	Map y = serialClone(x);
794	+
795	+	assertNotSame(x, y);
796	+	assertEquals(x.size(), y.size());
797	+	assertEquals(x, y);
798	+	assertEquals(y, x);
799	+	}
800
801		/**
802		* SetValue of an EntrySet entry sets value in the map.
803		*/
804		public void testSetValueWriteThrough() {
805	<	// Adapted from a bug report by Eric Zoerner
805	>	// Adapted from a bug report by Eric Zoerner
806		ConcurrentHashMap map = new ConcurrentHashMap(2, 5.0f, 1);
807		assertTrue(map.isEmpty());
808		for (int i = 0; i < 20; i++)
809		map.put(new Integer(i), new Integer(i));
810		assertFalse(map.isEmpty());
811		Map.Entry entry1 = (Map.Entry)map.entrySet().iterator().next();
812	<
813	<	// assert that entry1 is not 16
814	<	assertTrue("entry is 16, test not valid",
815	<	!entry1.getKey().equals(new Integer(16)));
816	<
817	<	// remove 16 (a different key) from map
818	<	// which just happens to cause entry1 to be cloned in map
819	<	map.remove(new Integer(16));
820	<	entry1.setValue("XYZ");
548	<	assertTrue(map.containsValue("XYZ")); // fails
812	>	// Unless it happens to be first (in which case remainder of
813	>	// test is skipped), remove a possibly-colliding key from map
814	>	// which, under some implementations, may cause entry1 to be
815	>	// cloned in map
816	>	if (!entry1.getKey().equals(new Integer(16))) {
817	>	map.remove(new Integer(16));
818	>	entry1.setValue("XYZ");
819	>	assertTrue(map.containsValue("XYZ")); // fails if write-through broken
820	>	}
821		}
822	<
822	>
823	>	/**
824	>	* Tests performance of removeAll when the other collection is much smaller.
825	>	* ant -Djsr166.tckTestClass=ConcurrentHashMapTest -Djsr166.methodFilter=testRemoveAll_performance -Djsr166.expensiveTests=true tck
826	>	*/
827	>	public void testRemoveAll_performance() {
828	>	final int mapSize = expensiveTests ? 1_000_000 : 100;
829	>	final int iterations = expensiveTests ? 500 : 2;
830	>	final ConcurrentHashMap<Integer, Integer> map = new ConcurrentHashMap<>();
831	>	for (int i = 0; i < mapSize; i++)
832	>	map.put(i, i);
833	>	Set<Integer> keySet = map.keySet();
834	>	Collection<Integer> removeMe = Arrays.asList(new Integer[] { -99, -86 });
835	>	for (int i = 0; i < iterations; i++)
836	>	assertFalse(keySet.removeAll(removeMe));
837	>	assertEquals(mapSize, map.size());
838	>	}
839	>
840	>	/**
841	>	* Tests performance of computeIfAbsent when the element is present.
842	>	* See JDK-8161372
843	>	* ant -Djsr166.tckTestClass=ConcurrentHashMapTest -Djsr166.methodFilter=testcomputeIfAbsent_performance -Djsr166.expensiveTests=true tck
844	>	*/
845	>	public void testcomputeIfAbsent_performance() {
846	>	final int mapSize = 20;
847	>	final int iterations = expensiveTests ? (1 << 23) : mapSize * 2;
848	>	final int threads = expensiveTests ? 10 : 2;
849	>	final ConcurrentHashMap<Integer, Integer> map = new ConcurrentHashMap<>();
850	>	for (int i = 0; i < mapSize; i++)
851	>	map.put(i, i);
852	>	final ExecutorService pool = Executors.newFixedThreadPool(2);
853	>	try (PoolCleaner cleaner = cleaner(pool)) {
854	>	Runnable r = new CheckedRunnable() {
855	>	public void realRun() {
856	>	int result = 0;
857	>	for (int i = 0; i < iterations; i++)
858	>	result += map.computeIfAbsent(i % mapSize, (k) -> k + k);
859	>	if (result == -42) throw new Error();
860	>	}};
861	>	for (int i = 0; i < threads; i++)
862	>	pool.execute(r);
863	>	}
864	>	}
865	>
866		}

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