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/publicdomain/zero/1.0/ |
5 |
*/ |
6 |
|
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import java.util.Arrays; |
8 |
import java.util.BitSet; |
9 |
import java.util.Collection; |
10 |
import java.util.Comparator; |
11 |
import java.util.Iterator; |
12 |
import java.util.NavigableSet; |
13 |
import java.util.NoSuchElementException; |
14 |
import java.util.Random; |
15 |
import java.util.Set; |
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import java.util.SortedSet; |
17 |
import java.util.concurrent.ConcurrentSkipListSet; |
18 |
|
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import junit.framework.Test; |
20 |
import junit.framework.TestSuite; |
21 |
|
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public class ConcurrentSkipListSetTest extends JSR166TestCase { |
23 |
public static void main(String[] args) { |
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main(suite(), args); |
25 |
} |
26 |
public static Test suite() { |
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return new TestSuite(ConcurrentSkipListSetTest.class); |
28 |
} |
29 |
|
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static class MyReverseComparator implements Comparator { |
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public int compare(Object x, Object y) { |
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return ((Comparable)y).compareTo(x); |
33 |
} |
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} |
35 |
|
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/** |
37 |
* Returns a new set of given size containing consecutive |
38 |
* Integers 0 ... n - 1. |
39 |
*/ |
40 |
private static ConcurrentSkipListSet<Integer> populatedSet(int n) { |
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ConcurrentSkipListSet<Integer> q = new ConcurrentSkipListSet<>(); |
42 |
assertTrue(q.isEmpty()); |
43 |
for (int i = n - 1; i >= 0; i -= 2) |
44 |
assertTrue(q.add(new Integer(i))); |
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for (int i = (n & 1); i < n; i += 2) |
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assertTrue(q.add(new Integer(i))); |
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assertFalse(q.isEmpty()); |
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assertEquals(n, q.size()); |
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return q; |
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} |
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|
52 |
/** |
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* Returns a new set of first 5 ints. |
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*/ |
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private static ConcurrentSkipListSet set5() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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assertTrue(q.isEmpty()); |
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q.add(one); |
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q.add(two); |
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q.add(three); |
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q.add(four); |
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q.add(five); |
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assertEquals(5, q.size()); |
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return q; |
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} |
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|
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/** |
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* A new set has unbounded capacity |
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*/ |
70 |
public void testConstructor1() { |
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assertEquals(0, new ConcurrentSkipListSet().size()); |
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} |
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|
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/** |
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* Initializing from null Collection throws NPE |
76 |
*/ |
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public void testConstructor3() { |
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try { |
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new ConcurrentSkipListSet((Collection)null); |
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shouldThrow(); |
81 |
} catch (NullPointerException success) {} |
82 |
} |
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|
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/** |
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* Initializing from Collection of null elements throws NPE |
86 |
*/ |
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public void testConstructor4() { |
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try { |
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new ConcurrentSkipListSet(Arrays.asList(new Integer[SIZE])); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
92 |
} |
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|
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/** |
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* Initializing from Collection with some null elements throws NPE |
96 |
*/ |
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public void testConstructor5() { |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE - 1; ++i) |
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ints[i] = new Integer(i); |
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try { |
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new ConcurrentSkipListSet(Arrays.asList(ints)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
105 |
} |
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|
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/** |
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* Set contains all elements of collection used to initialize |
109 |
*/ |
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public void testConstructor6() { |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; ++i) |
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ints[i] = new Integer(i); |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(Arrays.asList(ints)); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], q.pollFirst()); |
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} |
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|
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/** |
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* The comparator used in constructor is used |
121 |
*/ |
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public void testConstructor7() { |
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MyReverseComparator cmp = new MyReverseComparator(); |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(cmp); |
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assertEquals(cmp, q.comparator()); |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; ++i) |
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ints[i] = new Integer(i); |
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q.addAll(Arrays.asList(ints)); |
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for (int i = SIZE - 1; i >= 0; --i) |
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assertEquals(ints[i], q.pollFirst()); |
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} |
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|
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/** |
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* isEmpty is true before add, false after |
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*/ |
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public void testEmpty() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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assertTrue(q.isEmpty()); |
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q.add(new Integer(1)); |
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assertFalse(q.isEmpty()); |
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q.add(new Integer(2)); |
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q.pollFirst(); |
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q.pollFirst(); |
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assertTrue(q.isEmpty()); |
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} |
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|
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/** |
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* size changes when elements added and removed |
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*/ |
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public void testSize() { |
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ConcurrentSkipListSet q = populatedSet(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(SIZE - i, q.size()); |
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q.pollFirst(); |
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} |
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for (int i = 0; i < SIZE; ++i) { |
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assertEquals(i, q.size()); |
159 |
q.add(new Integer(i)); |
160 |
} |
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} |
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|
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/** |
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* add(null) throws NPE |
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*/ |
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public void testAddNull() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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try { |
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q.add(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
172 |
} |
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|
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/** |
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* Add of comparable element succeeds |
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*/ |
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public void testAdd() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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assertTrue(q.add(zero)); |
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assertTrue(q.add(one)); |
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} |
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|
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/** |
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* Add of duplicate element fails |
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*/ |
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public void testAddDup() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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assertTrue(q.add(zero)); |
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assertFalse(q.add(zero)); |
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} |
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|
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/** |
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* Add of non-Comparable throws CCE |
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*/ |
195 |
public void testAddNonComparable() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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try { |
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q.add(new Object()); |
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q.add(new Object()); |
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shouldThrow(); |
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} catch (ClassCastException success) { |
202 |
assertTrue(q.size() < 2); |
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for (int i = 0, size = q.size(); i < size; i++) |
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assertSame(Object.class, q.pollFirst().getClass()); |
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assertNull(q.pollFirst()); |
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assertTrue(q.isEmpty()); |
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assertEquals(0, q.size()); |
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} |
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} |
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|
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/** |
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* addAll(null) throws NPE |
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*/ |
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public void testAddAll1() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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try { |
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q.addAll(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
220 |
} |
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|
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/** |
223 |
* addAll of a collection with null elements throws NPE |
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*/ |
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public void testAddAll2() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
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Integer[] ints = new Integer[SIZE]; |
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try { |
229 |
q.addAll(Arrays.asList(ints)); |
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shouldThrow(); |
231 |
} catch (NullPointerException success) {} |
232 |
} |
233 |
|
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/** |
235 |
* addAll of a collection with any null elements throws NPE after |
236 |
* possibly adding some elements |
237 |
*/ |
238 |
public void testAddAll3() { |
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ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
240 |
Integer[] ints = new Integer[SIZE]; |
241 |
for (int i = 0; i < SIZE - 1; ++i) |
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ints[i] = new Integer(i); |
243 |
try { |
244 |
q.addAll(Arrays.asList(ints)); |
245 |
shouldThrow(); |
246 |
} catch (NullPointerException success) {} |
247 |
} |
248 |
|
249 |
/** |
250 |
* Set contains all elements of successful addAll |
251 |
*/ |
252 |
public void testAddAll5() { |
253 |
Integer[] empty = new Integer[0]; |
254 |
Integer[] ints = new Integer[SIZE]; |
255 |
for (int i = 0; i < SIZE; ++i) |
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ints[i] = new Integer(SIZE - 1 - i); |
257 |
ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
258 |
assertFalse(q.addAll(Arrays.asList(empty))); |
259 |
assertTrue(q.addAll(Arrays.asList(ints))); |
260 |
for (int i = 0; i < SIZE; ++i) |
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assertEquals(i, q.pollFirst()); |
262 |
} |
263 |
|
264 |
/** |
265 |
* pollFirst succeeds unless empty |
266 |
*/ |
267 |
public void testPollFirst() { |
268 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
269 |
for (int i = 0; i < SIZE; ++i) { |
270 |
assertEquals(i, q.pollFirst()); |
271 |
} |
272 |
assertNull(q.pollFirst()); |
273 |
} |
274 |
|
275 |
/** |
276 |
* pollLast succeeds unless empty |
277 |
*/ |
278 |
public void testPollLast() { |
279 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
280 |
for (int i = SIZE - 1; i >= 0; --i) { |
281 |
assertEquals(i, q.pollLast()); |
282 |
} |
283 |
assertNull(q.pollFirst()); |
284 |
} |
285 |
|
286 |
/** |
287 |
* remove(x) removes x and returns true if present |
288 |
*/ |
289 |
public void testRemoveElement() { |
290 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
291 |
for (int i = 1; i < SIZE; i += 2) { |
292 |
assertTrue(q.contains(i)); |
293 |
assertTrue(q.remove(i)); |
294 |
assertFalse(q.contains(i)); |
295 |
assertTrue(q.contains(i - 1)); |
296 |
} |
297 |
for (int i = 0; i < SIZE; i += 2) { |
298 |
assertTrue(q.contains(i)); |
299 |
assertTrue(q.remove(i)); |
300 |
assertFalse(q.contains(i)); |
301 |
assertFalse(q.remove(i + 1)); |
302 |
assertFalse(q.contains(i + 1)); |
303 |
} |
304 |
assertTrue(q.isEmpty()); |
305 |
} |
306 |
|
307 |
/** |
308 |
* contains(x) reports true when elements added but not yet removed |
309 |
*/ |
310 |
public void testContains() { |
311 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
312 |
for (int i = 0; i < SIZE; ++i) { |
313 |
assertTrue(q.contains(new Integer(i))); |
314 |
q.pollFirst(); |
315 |
assertFalse(q.contains(new Integer(i))); |
316 |
} |
317 |
} |
318 |
|
319 |
/** |
320 |
* clear removes all elements |
321 |
*/ |
322 |
public void testClear() { |
323 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
324 |
q.clear(); |
325 |
assertTrue(q.isEmpty()); |
326 |
assertEquals(0, q.size()); |
327 |
q.add(new Integer(1)); |
328 |
assertFalse(q.isEmpty()); |
329 |
q.clear(); |
330 |
assertTrue(q.isEmpty()); |
331 |
} |
332 |
|
333 |
/** |
334 |
* containsAll(c) is true when c contains a subset of elements |
335 |
*/ |
336 |
public void testContainsAll() { |
337 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
338 |
ConcurrentSkipListSet p = new ConcurrentSkipListSet(); |
339 |
for (int i = 0; i < SIZE; ++i) { |
340 |
assertTrue(q.containsAll(p)); |
341 |
assertFalse(p.containsAll(q)); |
342 |
p.add(new Integer(i)); |
343 |
} |
344 |
assertTrue(p.containsAll(q)); |
345 |
} |
346 |
|
347 |
/** |
348 |
* retainAll(c) retains only those elements of c and reports true if changed |
349 |
*/ |
350 |
public void testRetainAll() { |
351 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
352 |
ConcurrentSkipListSet p = populatedSet(SIZE); |
353 |
for (int i = 0; i < SIZE; ++i) { |
354 |
boolean changed = q.retainAll(p); |
355 |
if (i == 0) |
356 |
assertFalse(changed); |
357 |
else |
358 |
assertTrue(changed); |
359 |
|
360 |
assertTrue(q.containsAll(p)); |
361 |
assertEquals(SIZE - i, q.size()); |
362 |
p.pollFirst(); |
363 |
} |
364 |
} |
365 |
|
366 |
/** |
367 |
* removeAll(c) removes only those elements of c and reports true if changed |
368 |
*/ |
369 |
public void testRemoveAll() { |
370 |
for (int i = 1; i < SIZE; ++i) { |
371 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
372 |
ConcurrentSkipListSet p = populatedSet(i); |
373 |
assertTrue(q.removeAll(p)); |
374 |
assertEquals(SIZE - i, q.size()); |
375 |
for (int j = 0; j < i; ++j) { |
376 |
Integer x = (Integer)(p.pollFirst()); |
377 |
assertFalse(q.contains(x)); |
378 |
} |
379 |
} |
380 |
} |
381 |
|
382 |
/** |
383 |
* lower returns preceding element |
384 |
*/ |
385 |
public void testLower() { |
386 |
ConcurrentSkipListSet q = set5(); |
387 |
Object e1 = q.lower(three); |
388 |
assertEquals(two, e1); |
389 |
|
390 |
Object e2 = q.lower(six); |
391 |
assertEquals(five, e2); |
392 |
|
393 |
Object e3 = q.lower(one); |
394 |
assertNull(e3); |
395 |
|
396 |
Object e4 = q.lower(zero); |
397 |
assertNull(e4); |
398 |
} |
399 |
|
400 |
/** |
401 |
* higher returns next element |
402 |
*/ |
403 |
public void testHigher() { |
404 |
ConcurrentSkipListSet q = set5(); |
405 |
Object e1 = q.higher(three); |
406 |
assertEquals(four, e1); |
407 |
|
408 |
Object e2 = q.higher(zero); |
409 |
assertEquals(one, e2); |
410 |
|
411 |
Object e3 = q.higher(five); |
412 |
assertNull(e3); |
413 |
|
414 |
Object e4 = q.higher(six); |
415 |
assertNull(e4); |
416 |
} |
417 |
|
418 |
/** |
419 |
* floor returns preceding element |
420 |
*/ |
421 |
public void testFloor() { |
422 |
ConcurrentSkipListSet q = set5(); |
423 |
Object e1 = q.floor(three); |
424 |
assertEquals(three, e1); |
425 |
|
426 |
Object e2 = q.floor(six); |
427 |
assertEquals(five, e2); |
428 |
|
429 |
Object e3 = q.floor(one); |
430 |
assertEquals(one, e3); |
431 |
|
432 |
Object e4 = q.floor(zero); |
433 |
assertNull(e4); |
434 |
} |
435 |
|
436 |
/** |
437 |
* ceiling returns next element |
438 |
*/ |
439 |
public void testCeiling() { |
440 |
ConcurrentSkipListSet q = set5(); |
441 |
Object e1 = q.ceiling(three); |
442 |
assertEquals(three, e1); |
443 |
|
444 |
Object e2 = q.ceiling(zero); |
445 |
assertEquals(one, e2); |
446 |
|
447 |
Object e3 = q.ceiling(five); |
448 |
assertEquals(five, e3); |
449 |
|
450 |
Object e4 = q.ceiling(six); |
451 |
assertNull(e4); |
452 |
} |
453 |
|
454 |
/** |
455 |
* toArray contains all elements in sorted order |
456 |
*/ |
457 |
public void testToArray() { |
458 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
459 |
Object[] a = q.toArray(); |
460 |
assertSame(Object[].class, a.getClass()); |
461 |
for (Object o : a) |
462 |
assertSame(o, q.pollFirst()); |
463 |
assertTrue(q.isEmpty()); |
464 |
} |
465 |
|
466 |
/** |
467 |
* toArray(a) contains all elements in sorted order |
468 |
*/ |
469 |
public void testToArray2() { |
470 |
ConcurrentSkipListSet<Integer> q = populatedSet(SIZE); |
471 |
Integer[] ints = new Integer[SIZE]; |
472 |
assertSame(ints, q.toArray(ints)); |
473 |
for (Integer o : ints) |
474 |
assertSame(o, q.pollFirst()); |
475 |
assertTrue(q.isEmpty()); |
476 |
} |
477 |
|
478 |
/** |
479 |
* iterator iterates through all elements |
480 |
*/ |
481 |
public void testIterator() { |
482 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
483 |
Iterator it = q.iterator(); |
484 |
int i; |
485 |
for (i = 0; it.hasNext(); i++) |
486 |
assertTrue(q.contains(it.next())); |
487 |
assertEquals(i, SIZE); |
488 |
assertIteratorExhausted(it); |
489 |
} |
490 |
|
491 |
/** |
492 |
* iterator of empty set has no elements |
493 |
*/ |
494 |
public void testEmptyIterator() { |
495 |
NavigableSet s = new ConcurrentSkipListSet(); |
496 |
assertIteratorExhausted(s.iterator()); |
497 |
assertIteratorExhausted(s.descendingSet().iterator()); |
498 |
} |
499 |
|
500 |
/** |
501 |
* iterator.remove removes current element |
502 |
*/ |
503 |
public void testIteratorRemove() { |
504 |
final ConcurrentSkipListSet q = new ConcurrentSkipListSet(); |
505 |
q.add(new Integer(2)); |
506 |
q.add(new Integer(1)); |
507 |
q.add(new Integer(3)); |
508 |
|
509 |
Iterator it = q.iterator(); |
510 |
it.next(); |
511 |
it.remove(); |
512 |
|
513 |
it = q.iterator(); |
514 |
assertEquals(it.next(), new Integer(2)); |
515 |
assertEquals(it.next(), new Integer(3)); |
516 |
assertFalse(it.hasNext()); |
517 |
} |
518 |
|
519 |
/** |
520 |
* toString contains toStrings of elements |
521 |
*/ |
522 |
public void testToString() { |
523 |
ConcurrentSkipListSet q = populatedSet(SIZE); |
524 |
String s = q.toString(); |
525 |
for (int i = 0; i < SIZE; ++i) { |
526 |
assertTrue(s.contains(String.valueOf(i))); |
527 |
} |
528 |
} |
529 |
|
530 |
/** |
531 |
* A cloned set equals original |
532 |
*/ |
533 |
public void testClone() { |
534 |
ConcurrentSkipListSet x = populatedSet(SIZE); |
535 |
ConcurrentSkipListSet y = x.clone(); |
536 |
|
537 |
assertNotSame(x, y); |
538 |
assertEquals(x.size(), y.size()); |
539 |
assertEquals(x, y); |
540 |
assertEquals(y, x); |
541 |
while (!x.isEmpty()) { |
542 |
assertFalse(y.isEmpty()); |
543 |
assertEquals(x.pollFirst(), y.pollFirst()); |
544 |
} |
545 |
assertTrue(y.isEmpty()); |
546 |
} |
547 |
|
548 |
/** |
549 |
* A deserialized/reserialized set equals original |
550 |
*/ |
551 |
public void testSerialization() throws Exception { |
552 |
NavigableSet x = populatedSet(SIZE); |
553 |
NavigableSet y = serialClone(x); |
554 |
|
555 |
assertNotSame(x, y); |
556 |
assertEquals(x.size(), y.size()); |
557 |
assertEquals(x, y); |
558 |
assertEquals(y, x); |
559 |
while (!x.isEmpty()) { |
560 |
assertFalse(y.isEmpty()); |
561 |
assertEquals(x.pollFirst(), y.pollFirst()); |
562 |
} |
563 |
assertTrue(y.isEmpty()); |
564 |
} |
565 |
|
566 |
/** |
567 |
* subSet returns set with keys in requested range |
568 |
*/ |
569 |
public void testSubSetContents() { |
570 |
ConcurrentSkipListSet set = set5(); |
571 |
SortedSet sm = set.subSet(two, four); |
572 |
assertEquals(two, sm.first()); |
573 |
assertEquals(three, sm.last()); |
574 |
assertEquals(2, sm.size()); |
575 |
assertFalse(sm.contains(one)); |
576 |
assertTrue(sm.contains(two)); |
577 |
assertTrue(sm.contains(three)); |
578 |
assertFalse(sm.contains(four)); |
579 |
assertFalse(sm.contains(five)); |
580 |
Iterator i = sm.iterator(); |
581 |
Object k; |
582 |
k = (Integer)(i.next()); |
583 |
assertEquals(two, k); |
584 |
k = (Integer)(i.next()); |
585 |
assertEquals(three, k); |
586 |
assertFalse(i.hasNext()); |
587 |
Iterator j = sm.iterator(); |
588 |
j.next(); |
589 |
j.remove(); |
590 |
assertFalse(set.contains(two)); |
591 |
assertEquals(4, set.size()); |
592 |
assertEquals(1, sm.size()); |
593 |
assertEquals(three, sm.first()); |
594 |
assertEquals(three, sm.last()); |
595 |
assertTrue(sm.remove(three)); |
596 |
assertTrue(sm.isEmpty()); |
597 |
assertEquals(3, set.size()); |
598 |
} |
599 |
|
600 |
public void testSubSetContents2() { |
601 |
ConcurrentSkipListSet set = set5(); |
602 |
SortedSet sm = set.subSet(two, three); |
603 |
assertEquals(1, sm.size()); |
604 |
assertEquals(two, sm.first()); |
605 |
assertEquals(two, sm.last()); |
606 |
assertFalse(sm.contains(one)); |
607 |
assertTrue(sm.contains(two)); |
608 |
assertFalse(sm.contains(three)); |
609 |
assertFalse(sm.contains(four)); |
610 |
assertFalse(sm.contains(five)); |
611 |
Iterator i = sm.iterator(); |
612 |
Object k; |
613 |
k = (Integer)(i.next()); |
614 |
assertEquals(two, k); |
615 |
assertFalse(i.hasNext()); |
616 |
Iterator j = sm.iterator(); |
617 |
j.next(); |
618 |
j.remove(); |
619 |
assertFalse(set.contains(two)); |
620 |
assertEquals(4, set.size()); |
621 |
assertEquals(0, sm.size()); |
622 |
assertTrue(sm.isEmpty()); |
623 |
assertFalse(sm.remove(three)); |
624 |
assertEquals(4, set.size()); |
625 |
} |
626 |
|
627 |
/** |
628 |
* headSet returns set with keys in requested range |
629 |
*/ |
630 |
public void testHeadSetContents() { |
631 |
ConcurrentSkipListSet set = set5(); |
632 |
SortedSet sm = set.headSet(four); |
633 |
assertTrue(sm.contains(one)); |
634 |
assertTrue(sm.contains(two)); |
635 |
assertTrue(sm.contains(three)); |
636 |
assertFalse(sm.contains(four)); |
637 |
assertFalse(sm.contains(five)); |
638 |
Iterator i = sm.iterator(); |
639 |
Object k; |
640 |
k = (Integer)(i.next()); |
641 |
assertEquals(one, k); |
642 |
k = (Integer)(i.next()); |
643 |
assertEquals(two, k); |
644 |
k = (Integer)(i.next()); |
645 |
assertEquals(three, k); |
646 |
assertFalse(i.hasNext()); |
647 |
sm.clear(); |
648 |
assertTrue(sm.isEmpty()); |
649 |
assertEquals(2, set.size()); |
650 |
assertEquals(four, set.first()); |
651 |
} |
652 |
|
653 |
/** |
654 |
* tailSet returns set with keys in requested range |
655 |
*/ |
656 |
public void testTailSetContents() { |
657 |
ConcurrentSkipListSet set = set5(); |
658 |
SortedSet sm = set.tailSet(two); |
659 |
assertFalse(sm.contains(one)); |
660 |
assertTrue(sm.contains(two)); |
661 |
assertTrue(sm.contains(three)); |
662 |
assertTrue(sm.contains(four)); |
663 |
assertTrue(sm.contains(five)); |
664 |
Iterator i = sm.iterator(); |
665 |
Object k; |
666 |
k = (Integer)(i.next()); |
667 |
assertEquals(two, k); |
668 |
k = (Integer)(i.next()); |
669 |
assertEquals(three, k); |
670 |
k = (Integer)(i.next()); |
671 |
assertEquals(four, k); |
672 |
k = (Integer)(i.next()); |
673 |
assertEquals(five, k); |
674 |
assertFalse(i.hasNext()); |
675 |
|
676 |
SortedSet ssm = sm.tailSet(four); |
677 |
assertEquals(four, ssm.first()); |
678 |
assertEquals(five, ssm.last()); |
679 |
assertTrue(ssm.remove(four)); |
680 |
assertEquals(1, ssm.size()); |
681 |
assertEquals(3, sm.size()); |
682 |
assertEquals(4, set.size()); |
683 |
} |
684 |
|
685 |
Random rnd = new Random(666); |
686 |
|
687 |
/** |
688 |
* Subsets of subsets subdivide correctly |
689 |
*/ |
690 |
public void testRecursiveSubSets() throws Exception { |
691 |
int setSize = expensiveTests ? 1000 : 100; |
692 |
Class cl = ConcurrentSkipListSet.class; |
693 |
|
694 |
NavigableSet<Integer> set = newSet(cl); |
695 |
BitSet bs = new BitSet(setSize); |
696 |
|
697 |
populate(set, setSize, bs); |
698 |
check(set, 0, setSize - 1, true, bs); |
699 |
check(set.descendingSet(), 0, setSize - 1, false, bs); |
700 |
|
701 |
mutateSet(set, 0, setSize - 1, bs); |
702 |
check(set, 0, setSize - 1, true, bs); |
703 |
check(set.descendingSet(), 0, setSize - 1, false, bs); |
704 |
|
705 |
bashSubSet(set.subSet(0, true, setSize, false), |
706 |
0, setSize - 1, true, bs); |
707 |
} |
708 |
|
709 |
/** |
710 |
* addAll is idempotent |
711 |
*/ |
712 |
public void testAddAll_idempotent() throws Exception { |
713 |
Set x = populatedSet(SIZE); |
714 |
Set y = new ConcurrentSkipListSet(x); |
715 |
y.addAll(x); |
716 |
assertEquals(x, y); |
717 |
assertEquals(y, x); |
718 |
} |
719 |
|
720 |
static NavigableSet<Integer> newSet(Class cl) throws Exception { |
721 |
NavigableSet<Integer> result = |
722 |
(NavigableSet<Integer>) cl.getConstructor().newInstance(); |
723 |
assertEquals(0, result.size()); |
724 |
assertFalse(result.iterator().hasNext()); |
725 |
return result; |
726 |
} |
727 |
|
728 |
void populate(NavigableSet<Integer> set, int limit, BitSet bs) { |
729 |
for (int i = 0, n = 2 * limit / 3; i < n; i++) { |
730 |
int element = rnd.nextInt(limit); |
731 |
put(set, element, bs); |
732 |
} |
733 |
} |
734 |
|
735 |
void mutateSet(NavigableSet<Integer> set, int min, int max, BitSet bs) { |
736 |
int size = set.size(); |
737 |
int rangeSize = max - min + 1; |
738 |
|
739 |
// Remove a bunch of entries directly |
740 |
for (int i = 0, n = rangeSize / 2; i < n; i++) { |
741 |
remove(set, min - 5 + rnd.nextInt(rangeSize + 10), bs); |
742 |
} |
743 |
|
744 |
// Remove a bunch of entries with iterator |
745 |
for (Iterator<Integer> it = set.iterator(); it.hasNext(); ) { |
746 |
if (rnd.nextBoolean()) { |
747 |
bs.clear(it.next()); |
748 |
it.remove(); |
749 |
} |
750 |
} |
751 |
|
752 |
// Add entries till we're back to original size |
753 |
while (set.size() < size) { |
754 |
int element = min + rnd.nextInt(rangeSize); |
755 |
assertTrue(element >= min && element <= max); |
756 |
put(set, element, bs); |
757 |
} |
758 |
} |
759 |
|
760 |
void mutateSubSet(NavigableSet<Integer> set, int min, int max, |
761 |
BitSet bs) { |
762 |
int size = set.size(); |
763 |
int rangeSize = max - min + 1; |
764 |
|
765 |
// Remove a bunch of entries directly |
766 |
for (int i = 0, n = rangeSize / 2; i < n; i++) { |
767 |
remove(set, min - 5 + rnd.nextInt(rangeSize + 10), bs); |
768 |
} |
769 |
|
770 |
// Remove a bunch of entries with iterator |
771 |
for (Iterator<Integer> it = set.iterator(); it.hasNext(); ) { |
772 |
if (rnd.nextBoolean()) { |
773 |
bs.clear(it.next()); |
774 |
it.remove(); |
775 |
} |
776 |
} |
777 |
|
778 |
// Add entries till we're back to original size |
779 |
while (set.size() < size) { |
780 |
int element = min - 5 + rnd.nextInt(rangeSize + 10); |
781 |
if (element >= min && element <= max) { |
782 |
put(set, element, bs); |
783 |
} else { |
784 |
try { |
785 |
set.add(element); |
786 |
shouldThrow(); |
787 |
} catch (IllegalArgumentException success) {} |
788 |
} |
789 |
} |
790 |
} |
791 |
|
792 |
void put(NavigableSet<Integer> set, int element, BitSet bs) { |
793 |
if (set.add(element)) |
794 |
bs.set(element); |
795 |
} |
796 |
|
797 |
void remove(NavigableSet<Integer> set, int element, BitSet bs) { |
798 |
if (set.remove(element)) |
799 |
bs.clear(element); |
800 |
} |
801 |
|
802 |
void bashSubSet(NavigableSet<Integer> set, |
803 |
int min, int max, boolean ascending, |
804 |
BitSet bs) { |
805 |
check(set, min, max, ascending, bs); |
806 |
check(set.descendingSet(), min, max, !ascending, bs); |
807 |
|
808 |
mutateSubSet(set, min, max, bs); |
809 |
check(set, min, max, ascending, bs); |
810 |
check(set.descendingSet(), min, max, !ascending, bs); |
811 |
|
812 |
// Recurse |
813 |
if (max - min < 2) |
814 |
return; |
815 |
int midPoint = (min + max) / 2; |
816 |
|
817 |
// headSet - pick direction and endpoint inclusion randomly |
818 |
boolean incl = rnd.nextBoolean(); |
819 |
NavigableSet<Integer> hm = set.headSet(midPoint, incl); |
820 |
if (ascending) { |
821 |
if (rnd.nextBoolean()) |
822 |
bashSubSet(hm, min, midPoint - (incl ? 0 : 1), true, bs); |
823 |
else |
824 |
bashSubSet(hm.descendingSet(), min, midPoint - (incl ? 0 : 1), |
825 |
false, bs); |
826 |
} else { |
827 |
if (rnd.nextBoolean()) |
828 |
bashSubSet(hm, midPoint + (incl ? 0 : 1), max, false, bs); |
829 |
else |
830 |
bashSubSet(hm.descendingSet(), midPoint + (incl ? 0 : 1), max, |
831 |
true, bs); |
832 |
} |
833 |
|
834 |
// tailSet - pick direction and endpoint inclusion randomly |
835 |
incl = rnd.nextBoolean(); |
836 |
NavigableSet<Integer> tm = set.tailSet(midPoint,incl); |
837 |
if (ascending) { |
838 |
if (rnd.nextBoolean()) |
839 |
bashSubSet(tm, midPoint + (incl ? 0 : 1), max, true, bs); |
840 |
else |
841 |
bashSubSet(tm.descendingSet(), midPoint + (incl ? 0 : 1), max, |
842 |
false, bs); |
843 |
} else { |
844 |
if (rnd.nextBoolean()) { |
845 |
bashSubSet(tm, min, midPoint - (incl ? 0 : 1), false, bs); |
846 |
} else { |
847 |
bashSubSet(tm.descendingSet(), min, midPoint - (incl ? 0 : 1), |
848 |
true, bs); |
849 |
} |
850 |
} |
851 |
|
852 |
// subSet - pick direction and endpoint inclusion randomly |
853 |
int rangeSize = max - min + 1; |
854 |
int[] endpoints = new int[2]; |
855 |
endpoints[0] = min + rnd.nextInt(rangeSize); |
856 |
endpoints[1] = min + rnd.nextInt(rangeSize); |
857 |
Arrays.sort(endpoints); |
858 |
boolean lowIncl = rnd.nextBoolean(); |
859 |
boolean highIncl = rnd.nextBoolean(); |
860 |
if (ascending) { |
861 |
NavigableSet<Integer> sm = set.subSet( |
862 |
endpoints[0], lowIncl, endpoints[1], highIncl); |
863 |
if (rnd.nextBoolean()) |
864 |
bashSubSet(sm, endpoints[0] + (lowIncl ? 0 : 1), |
865 |
endpoints[1] - (highIncl ? 0 : 1), true, bs); |
866 |
else |
867 |
bashSubSet(sm.descendingSet(), endpoints[0] + (lowIncl ? 0 : 1), |
868 |
endpoints[1] - (highIncl ? 0 : 1), false, bs); |
869 |
} else { |
870 |
NavigableSet<Integer> sm = set.subSet( |
871 |
endpoints[1], highIncl, endpoints[0], lowIncl); |
872 |
if (rnd.nextBoolean()) |
873 |
bashSubSet(sm, endpoints[0] + (lowIncl ? 0 : 1), |
874 |
endpoints[1] - (highIncl ? 0 : 1), false, bs); |
875 |
else |
876 |
bashSubSet(sm.descendingSet(), endpoints[0] + (lowIncl ? 0 : 1), |
877 |
endpoints[1] - (highIncl ? 0 : 1), true, bs); |
878 |
} |
879 |
} |
880 |
|
881 |
/** |
882 |
* min and max are both inclusive. If max < min, interval is empty. |
883 |
*/ |
884 |
void check(NavigableSet<Integer> set, |
885 |
final int min, final int max, final boolean ascending, |
886 |
final BitSet bs) { |
887 |
class ReferenceSet { |
888 |
int lower(int element) { |
889 |
return ascending ? |
890 |
lowerAscending(element) : higherAscending(element); |
891 |
} |
892 |
int floor(int element) { |
893 |
return ascending ? |
894 |
floorAscending(element) : ceilingAscending(element); |
895 |
} |
896 |
int ceiling(int element) { |
897 |
return ascending ? |
898 |
ceilingAscending(element) : floorAscending(element); |
899 |
} |
900 |
int higher(int element) { |
901 |
return ascending ? |
902 |
higherAscending(element) : lowerAscending(element); |
903 |
} |
904 |
int first() { |
905 |
return ascending ? firstAscending() : lastAscending(); |
906 |
} |
907 |
int last() { |
908 |
return ascending ? lastAscending() : firstAscending(); |
909 |
} |
910 |
int lowerAscending(int element) { |
911 |
return floorAscending(element - 1); |
912 |
} |
913 |
int floorAscending(int element) { |
914 |
if (element < min) |
915 |
return -1; |
916 |
else if (element > max) |
917 |
element = max; |
918 |
|
919 |
// BitSet should support this! Test would run much faster |
920 |
while (element >= min) { |
921 |
if (bs.get(element)) |
922 |
return element; |
923 |
element--; |
924 |
} |
925 |
return -1; |
926 |
} |
927 |
int ceilingAscending(int element) { |
928 |
if (element < min) |
929 |
element = min; |
930 |
else if (element > max) |
931 |
return -1; |
932 |
int result = bs.nextSetBit(element); |
933 |
return result > max ? -1 : result; |
934 |
} |
935 |
int higherAscending(int element) { |
936 |
return ceilingAscending(element + 1); |
937 |
} |
938 |
private int firstAscending() { |
939 |
int result = ceilingAscending(min); |
940 |
return result > max ? -1 : result; |
941 |
} |
942 |
private int lastAscending() { |
943 |
int result = floorAscending(max); |
944 |
return result < min ? -1 : result; |
945 |
} |
946 |
} |
947 |
ReferenceSet rs = new ReferenceSet(); |
948 |
|
949 |
// Test contents using containsElement |
950 |
int size = 0; |
951 |
for (int i = min; i <= max; i++) { |
952 |
boolean bsContainsI = bs.get(i); |
953 |
assertEquals(bsContainsI, set.contains(i)); |
954 |
if (bsContainsI) |
955 |
size++; |
956 |
} |
957 |
assertEquals(size, set.size()); |
958 |
|
959 |
// Test contents using contains elementSet iterator |
960 |
int size2 = 0; |
961 |
int previousElement = -1; |
962 |
for (int element : set) { |
963 |
assertTrue(bs.get(element)); |
964 |
size2++; |
965 |
assertTrue(previousElement < 0 || (ascending ? |
966 |
element - previousElement > 0 : element - previousElement < 0)); |
967 |
previousElement = element; |
968 |
} |
969 |
assertEquals(size2, size); |
970 |
|
971 |
// Test navigation ops |
972 |
for (int element = min - 1; element <= max + 1; element++) { |
973 |
assertEq(set.lower(element), rs.lower(element)); |
974 |
assertEq(set.floor(element), rs.floor(element)); |
975 |
assertEq(set.higher(element), rs.higher(element)); |
976 |
assertEq(set.ceiling(element), rs.ceiling(element)); |
977 |
} |
978 |
|
979 |
// Test extrema |
980 |
if (set.size() != 0) { |
981 |
assertEq(set.first(), rs.first()); |
982 |
assertEq(set.last(), rs.last()); |
983 |
} else { |
984 |
assertEq(rs.first(), -1); |
985 |
assertEq(rs.last(), -1); |
986 |
try { |
987 |
set.first(); |
988 |
shouldThrow(); |
989 |
} catch (NoSuchElementException success) {} |
990 |
try { |
991 |
set.last(); |
992 |
shouldThrow(); |
993 |
} catch (NoSuchElementException success) {} |
994 |
} |
995 |
} |
996 |
|
997 |
static void assertEq(Integer i, int j) { |
998 |
if (i == null) |
999 |
assertEquals(j, -1); |
1000 |
else |
1001 |
assertEquals((int) i, j); |
1002 |
} |
1003 |
|
1004 |
static boolean eq(Integer i, int j) { |
1005 |
return (i == null) ? j == -1 : i == j; |
1006 |
} |
1007 |
|
1008 |
} |