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Comparing jsr166/src/test/tck/ConcurrentHashMapTest.java (file contents):
Revision 1.22 by jsr166, Sat Oct 9 19:30:34 2010 UTC vs.
Revision 1.38 by jsr166, Tue Sep 24 17:03:14 2013 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
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.*;
12	<	import java.util.Enumeration;
13	<	import java.io.*;
11	>	import java.util.concurrent.ConcurrentHashMap;
12
13		public class ConcurrentHashMapTest extends JSR166TestCase {
14		public static void main(String[] args) {
#	Line 21 | Line 19 | public class ConcurrentHashMapTest exten
19		}
20
21		/**
22	<	* Create a map from Integers 1-5 to Strings "A"-"E".
22	>	* Returns a new map from Integers 1-5 to Strings "A"-"E".
23		*/
24	<	private static ConcurrentHashMap map5() {
25	<	ConcurrentHashMap map = new ConcurrentHashMap(5);
24	>	private static ConcurrentHashMap<Integer, String> map5() {
25	>	ConcurrentHashMap map = new ConcurrentHashMap<Integer, String>(5);
26		assertTrue(map.isEmpty());
27		map.put(one, "A");
28		map.put(two, "B");
#	Line 36 | Line 34 | public class ConcurrentHashMapTest exten
34		return map;
35		}
36
37	+	/** Re-implement Integer.compare for old java versions */
38	+	static int compare(int x, int y) { return x < y ? -1 : x > y ? 1 : 0; }
39	+
40	+	// classes for testing Comparable fallbacks
41	+	static class BI implements Comparable<BI> {
42	+	private final int value;
43	+	BI(int value) { this.value = value; }
44	+	public int compareTo(BI other) {
45	+	return compare(value, other.value);
46	+	}
47	+	public boolean equals(Object x) {
48	+	return (x instanceof BI) && ((BI)x).value == value;
49	+	}
50	+	public int hashCode() { return 42; }
51	+	}
52	+	static class CI extends BI { CI(int value) { super(value); } }
53	+	static class DI extends BI { DI(int value) { super(value); } }
54	+
55	+	static class BS implements Comparable<BS> {
56	+	private final String value;
57	+	BS(String value) { this.value = value; }
58	+	public int compareTo(BS other) {
59	+	return value.compareTo(other.value);
60	+	}
61	+	public boolean equals(Object x) {
62	+	return (x instanceof BS) && value.equals(((BS)x).value);
63	+	}
64	+	public int hashCode() { return 42; }
65	+	}
66	+
67	+	static class LexicographicList<E extends Comparable<E>> extends ArrayList<E>
68	+	implements Comparable<LexicographicList<E>> {
69	+	LexicographicList(Collection<E> c) { super(c); }
70	+	LexicographicList(E e) { super(Collections.singleton(e)); }
71	+	public int compareTo(LexicographicList<E> other) {
72	+	int common = Math.min(size(), other.size());
73	+	int r = 0;
74	+	for (int i = 0; i < common; i++) {
75	+	if ((r = get(i).compareTo(other.get(i))) != 0)
76	+	break;
77	+	}
78	+	if (r == 0)
79	+	r = compare(size(), other.size());
80	+	return r;
81	+	}
82	+	private static final long serialVersionUID = 0;
83	+	}
84	+
85	+	static class CollidingObject {
86	+	final String value;
87	+	CollidingObject(final String value) { this.value = value; }
88	+	public int hashCode() { return this.value.hashCode() & 1; }
89	+	public boolean equals(final Object obj) {
90	+	return (obj instanceof CollidingObject) && ((CollidingObject)obj).value.equals(value);
91	+	}
92	+	}
93	+
94	+	static class ComparableCollidingObject extends CollidingObject implements Comparable<ComparableCollidingObject> {
95	+	ComparableCollidingObject(final String value) { super(value); }
96	+	public int compareTo(final ComparableCollidingObject o) {
97	+	return value.compareTo(o.value);
98	+	}
99	+	}
100	+
101	+	/**
102	+	* Inserted elements that are subclasses of the same Comparable
103	+	* class are found.
104	+	*/
105	+	public void testComparableFamily() {
106	+	ConcurrentHashMap<BI, Boolean> m =
107	+	new ConcurrentHashMap<BI, Boolean>();
108	+	for (int i = 0; i < 1000; i++) {
109	+	assertTrue(m.put(new CI(i), true) == null);
110	+	}
111	+	for (int i = 0; i < 1000; i++) {
112	+	assertTrue(m.containsKey(new CI(i)));
113	+	assertTrue(m.containsKey(new DI(i)));
114	+	}
115	+	}
116	+
117	+	/**
118	+	* Elements of classes with erased generic type parameters based
119	+	* on Comparable can be inserted and found.
120	+	*/
121	+	public void testGenericComparable() {
122	+	ConcurrentHashMap<Object, Boolean> m =
123	+	new ConcurrentHashMap<Object, Boolean>();
124	+	for (int i = 0; i < 1000; i++) {
125	+	BI bi = new BI(i);
126	+	BS bs = new BS(String.valueOf(i));
127	+	LexicographicList<BI> bis = new LexicographicList<BI>(bi);
128	+	LexicographicList<BS> bss = new LexicographicList<BS>(bs);
129	+	assertTrue(m.putIfAbsent(bis, true) == null);
130	+	assertTrue(m.containsKey(bis));
131	+	if (m.putIfAbsent(bss, true) == null)
132	+	assertTrue(m.containsKey(bss));
133	+	assertTrue(m.containsKey(bis));
134	+	}
135	+	for (int i = 0; i < 1000; i++) {
136	+	assertTrue(m.containsKey(new ArrayList(Collections.singleton(new BI(i)))));
137	+	}
138	+	}
139	+
140	+	/**
141	+	* Elements of non-comparable classes equal to those of classes
142	+	* with erased generic type parameters based on Comparable can be
143	+	* inserted and found.
144	+	*/
145	+	public void testGenericComparable2() {
146	+	ConcurrentHashMap<Object, Boolean> m =
147	+	new ConcurrentHashMap<Object, Boolean>();
148	+	for (int i = 0; i < 1000; i++) {
149	+	m.put(new ArrayList(Collections.singleton(new BI(i))), true);
150	+	}
151	+
152	+	for (int i = 0; i < 1000; i++) {
153	+	LexicographicList<BI> bis = new LexicographicList<BI>(new BI(i));
154	+	assertTrue(m.containsKey(bis));
155	+	}
156	+	}
157	+
158	+	/**
159	+	* Mixtures of instances of comparable and non-comparable classes
160	+	* can be inserted and found.
161	+	*/
162	+	public void testMixedComparable() {
163	+	int size = 1200;        // makes measured test run time -> 35ms
164	+	ConcurrentHashMap<Object, Object> map =
165	+	new ConcurrentHashMap<Object, Object>();
166	+	Random rng = new Random();
167	+	for (int i = 0; i < size; i++) {
168	+	Object x;
169	+	switch (rng.nextInt(4)) {
170	+	case 0:
171	+	x = new Object();
172	+	break;
173	+	case 1:
174	+	x = new CollidingObject(Integer.toString(i));
175	+	break;
176	+	default:
177	+	x = new ComparableCollidingObject(Integer.toString(i));
178	+	}
179	+	assertNull(map.put(x, x));
180	+	}
181	+	int count = 0;
182	+	for (Object k : map.keySet()) {
183	+	assertEquals(map.get(k), k);
184	+	++count;
185	+	}
186	+	assertEquals(count, size);
187	+	assertEquals(map.size(), size);
188	+	for (Object k : map.keySet()) {
189	+	assertEquals(map.put(k, k), k);
190	+	}
191	+	}
192	+
193		/**
194		* clear removes all pairs
195		*/
196		public void testClear() {
197		ConcurrentHashMap map = map5();
198		map.clear();
199	<	assertEquals(map.size(), 0);
199	>	assertEquals(0, map.size());
200		}
201
202		/**
#	Line 59 | Line 213 | public class ConcurrentHashMapTest exten
213		}
214
215		/**
216	+	* hashCode() equals sum of each key.hashCode ^ value.hashCode
217	+	*/
218	+	public void testHashCode() {
219	+	ConcurrentHashMap<Integer,String> map = map5();
220	+	int sum = 0;
221	+	for (Map.Entry<Integer,String> e : map.entrySet())
222	+	sum += e.getKey().hashCode() ^ e.getValue().hashCode();
223	+	assertEquals(sum, map.hashCode());
224	+	}
225	+
226	+	/**
227		* contains returns true for contained value
228		*/
229		public void testContains() {
#	Line 275 | Line 440 | public class ConcurrentHashMapTest exten
440		assertEquals("Z", map.get(one));
441		}
442
278	–
443		/**
444		* replace value fails when the given key not mapped to expected value
445		*/
#	Line 296 | Line 460 | public class ConcurrentHashMapTest exten
460		assertEquals("Z", map.get(one));
461		}
462
299	–
463		/**
464		* remove removes the correct key-value pair from the map
465		*/
#	Line 337 | Line 500 | public class ConcurrentHashMapTest exten
500		ConcurrentHashMap map = map5();
501		String s = map.toString();
502		for (int i = 1; i <= 5; ++i) {
503	<	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
503	>	assertTrue(s.contains(String.valueOf(i)));
504		}
505		}
506
507		// Exception tests
508
509		/**
510	<	* Cannot create with negative capacity
510	>	* Cannot create with only negative capacity
511		*/
512		public void testConstructor1() {
513		try {
514	<	new ConcurrentHashMap(-1,0,1);
514	>	new ConcurrentHashMap(-1);
515		shouldThrow();
516		} catch (IllegalArgumentException success) {}
517		}
518
519		/**
520	<	* Cannot create with negative concurrency level
521	<	*/
520	>	* Constructor (initialCapacity, loadFactor) throws
521	>	* IllegalArgumentException if either argument is negative
522	>	*/
523		public void testConstructor2() {
524		try {
525	<	new ConcurrentHashMap(1,0,-1);
525	>	new ConcurrentHashMap(-1, .75f);
526		shouldThrow();
527	<	} catch (IllegalArgumentException success) {}
527	>	} catch (IllegalArgumentException e) {}
528	>
529	>	try {
530	>	new ConcurrentHashMap(16, -1);
531	>	shouldThrow();
532	>	} catch (IllegalArgumentException e) {}
533		}
534
535		/**
536	<	* Cannot create with only negative capacity
536	>	* Constructor (initialCapacity, loadFactor, concurrencyLevel)
537	>	* throws IllegalArgumentException if any argument is negative
538		*/
539		public void testConstructor3() {
540		try {
541	<	new ConcurrentHashMap(-1);
541	>	new ConcurrentHashMap(-1, .75f, 1);
542		shouldThrow();
543	<	} catch (IllegalArgumentException success) {}
543	>	} catch (IllegalArgumentException e) {}
544	>
545	>	try {
546	>	new ConcurrentHashMap(16, -1, 1);
547	>	shouldThrow();
548	>	} catch (IllegalArgumentException e) {}
549	>
550	>	try {
551	>	new ConcurrentHashMap(16, .75f, -1);
552	>	shouldThrow();
553	>	} catch (IllegalArgumentException e) {}
554		}
555
556		/**
557	+	* ConcurrentHashMap(map) throws NullPointerException if the given
558	+	* map is null
559	+	*/
560	+	public void testConstructor4() {
561	+	try {
562	+	new ConcurrentHashMap(null);
563	+	shouldThrow();
564	+	} catch (NullPointerException e) {}
565	+	}
566	+
567	+	/**
568	+	* ConcurrentHashMap(map) creates a new map with the same mappings
569	+	* as the given map
570	+	*/
571	+	public void testConstructor5() {
572	+	ConcurrentHashMap map1 = map5();
573	+	ConcurrentHashMap map2 = new ConcurrentHashMap(map5());
574	+	assertTrue(map2.equals(map1));
575	+	map2.put(one, "F");
576	+	assertFalse(map2.equals(map1));
577	+	}
578	+
579	+
580	+	/**
581		* get(null) throws NPE
582		*/
583		public void testGet_NullPointerException() {
#	Line 483 | Line 687 | public class ConcurrentHashMapTest exten
687		} catch (NullPointerException success) {}
688		}
689
486	–
690		/**
691		* replace(x, null) throws NPE
692		*/
#	Line 517 | Line 720 | public class ConcurrentHashMapTest exten
720		} catch (NullPointerException success) {}
721		}
722
520	–
723		/**
724		* remove(null) throws NPE
725		*/
#	Line 555 | Line 757 | public class ConcurrentHashMapTest exten
757		* A deserialized map equals original
758		*/
759		public void testSerialization() throws Exception {
760	<	ConcurrentHashMap q = map5();
760	>	Map x = map5();
761	>	Map y = serialClone(x);
762
763	<	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
764	<	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
765	<	out.writeObject(q);
766	<	out.close();
564	<
565	<	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
566	<	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
567	<	ConcurrentHashMap r = (ConcurrentHashMap)in.readObject();
568	<	assertEquals(q.size(), r.size());
569	<	assertTrue(q.equals(r));
570	<	assertTrue(r.equals(q));
763	>	assertNotSame(x, y);
764	>	assertEquals(x.size(), y.size());
765	>	assertEquals(x, y);
766	>	assertEquals(y, x);
767		}
768
573	–
769		/**
770		* SetValue of an EntrySet entry sets value in the map.
771		*/
#	Line 582 | Line 777 | public class ConcurrentHashMapTest exten
777		map.put(new Integer(i), new Integer(i));
778		assertFalse(map.isEmpty());
779		Map.Entry entry1 = (Map.Entry)map.entrySet().iterator().next();
780	<
781	<	// assert that entry1 is not 16
782	<	assertTrue("entry is 16, test not valid",
783	<	!entry1.getKey().equals(new Integer(16)));
784	<
785	<	// remove 16 (a different key) from map
786	<	// which just happens to cause entry1 to be cloned in map
787	<	map.remove(new Integer(16));
788	<	entry1.setValue("XYZ");
594	<	assertTrue(map.containsValue("XYZ")); // fails
780	>	// Unless it happens to be first (in which case remainder of
781	>	// test is skipped), remove a possibly-colliding key from map
782	>	// which, under some implementations, may cause entry1 to be
783	>	// cloned in map
784	>	if (!entry1.getKey().equals(new Integer(16))) {
785	>	map.remove(new Integer(16));
786	>	entry1.setValue("XYZ");
787	>	assertTrue(map.containsValue("XYZ")); // fails if write-through broken
788	>	}
789		}
790
791		}

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