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/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
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* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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*/ |
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|
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import java.util.Arrays; |
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import java.util.BitSet; |
9 |
import java.util.Collection; |
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import java.util.Comparator; |
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import java.util.Iterator; |
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import java.util.NavigableSet; |
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import java.util.NoSuchElementException; |
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import java.util.Random; |
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import java.util.Set; |
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import java.util.SortedSet; |
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import java.util.concurrent.ConcurrentSkipListSet; |
18 |
|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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|
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public class ConcurrentSkipListSetTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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main(suite(), args); |
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} |
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public static Test suite() { |
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return new TestSuite(ConcurrentSkipListSetTest.class); |
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} |
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|
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static class MyReverseComparator implements Comparator { |
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@SuppressWarnings("unchecked") |
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public int compare(Object x, Object y) { |
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return ((Comparable)y).compareTo(x); |
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} |
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} |
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|
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/** |
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* Returns a new set of given size containing consecutive |
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* Items 0 ... n - 1. |
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*/ |
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private static ConcurrentSkipListSet<Item> populatedSet(int n) { |
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ConcurrentSkipListSet<Item> q = new ConcurrentSkipListSet<>(); |
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assertTrue(q.isEmpty()); |
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for (int i = n - 1; i >= 0; i -= 2) |
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mustAdd(q, i); |
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for (int i = (n & 1); i < n; i += 2) |
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mustAdd(q, i); |
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assertFalse(q.isEmpty()); |
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mustEqual(n, q.size()); |
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return q; |
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} |
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|
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/** |
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* Returns a new set of first 5 ints. |
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*/ |
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private static ConcurrentSkipListSet<Item> set5() { |
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ConcurrentSkipListSet<Item> q = new ConcurrentSkipListSet<Item>(); |
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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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mustEqual(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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*/ |
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public void testConstructor1() { |
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mustEqual(0, new ConcurrentSkipListSet<Item>().size()); |
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} |
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|
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/** |
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* Initializing from null Collection throws NPE |
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*/ |
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public void testConstructor3() { |
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try { |
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new ConcurrentSkipListSet<Item>((Collection<Item>)null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Initializing from Collection of null elements throws NPE |
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*/ |
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public void testConstructor4() { |
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try { |
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new ConcurrentSkipListSet<Item>(Arrays.asList(new Item[SIZE])); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Initializing from Collection with some null elements throws NPE |
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*/ |
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public void testConstructor5() { |
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Item[] items = new Item[2]; |
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items[0] = zero; |
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try { |
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new ConcurrentSkipListSet<Item>(Arrays.asList(items)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Set contains all elements of collection used to initialize |
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*/ |
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public void testConstructor6() { |
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Item[] items = defaultItems; |
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ConcurrentSkipListSet<Item> q = new ConcurrentSkipListSet<Item>(Arrays.asList(items)); |
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for (int i = 0; i < SIZE; ++i) |
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mustEqual(items[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 |
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*/ |
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public void testConstructor7() { |
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MyReverseComparator cmp = new MyReverseComparator(); |
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@SuppressWarnings("unchecked") |
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ConcurrentSkipListSet<Item> q = new ConcurrentSkipListSet<Item>(cmp); |
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mustEqual(cmp, q.comparator()); |
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Item[] items = defaultItems; |
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q.addAll(Arrays.asList(items)); |
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for (int i = SIZE - 1; i >= 0; --i) |
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mustEqual(items[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<Item> q = new ConcurrentSkipListSet<Item>(); |
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assertTrue(q.isEmpty()); |
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mustAdd(q, one); |
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assertFalse(q.isEmpty()); |
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mustAdd(q, two); |
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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<Item> q = populatedSet(SIZE); |
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for (int i = 0; i < SIZE; ++i) { |
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mustEqual(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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mustEqual(i, q.size()); |
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mustAdd(q, i); |
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} |
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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<Item> q = new ConcurrentSkipListSet<Item>(); |
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try { |
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q.add(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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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<Item> q = new ConcurrentSkipListSet<Item>(); |
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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<Item> q = new ConcurrentSkipListSet<Item>(); |
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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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*/ |
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public void testAddNonComparable() { |
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ConcurrentSkipListSet<Object> q = new ConcurrentSkipListSet<Object>(); |
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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) { |
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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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mustEqual(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<Item> q = new ConcurrentSkipListSet<Item>(); |
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try { |
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q.addAll(null); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* 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<Item> q = new ConcurrentSkipListSet<Item>(); |
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Item[] items = new Item[SIZE]; |
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try { |
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q.addAll(Arrays.asList(items)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* addAll of a collection with any null elements throws NPE after |
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* possibly adding some elements |
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*/ |
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public void testAddAll3() { |
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ConcurrentSkipListSet<Item> q = new ConcurrentSkipListSet<Item>(); |
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Item[] items = new Item[2]; items[0] = zero; |
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try { |
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q.addAll(Arrays.asList(items)); |
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shouldThrow(); |
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} catch (NullPointerException success) {} |
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} |
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|
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/** |
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* Set contains all elements of successful addAll |
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*/ |
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public void testAddAll5() { |
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Item[] empty = new Item[0]; |
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Item[] items = defaultItems; |
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ConcurrentSkipListSet<Item> q = new ConcurrentSkipListSet<Item>(); |
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assertFalse(q.addAll(Arrays.asList(empty))); |
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assertTrue(q.addAll(Arrays.asList(items))); |
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for (int i = 0; i < SIZE; ++i) |
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mustEqual(i, q.pollFirst()); |
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} |
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|
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/** |
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* pollFirst succeeds unless empty |
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*/ |
260 |
public void testPollFirst() { |
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ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
262 |
for (int i = 0; i < SIZE; ++i) { |
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mustEqual(i, q.pollFirst()); |
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} |
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assertNull(q.pollFirst()); |
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} |
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|
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/** |
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* pollLast succeeds unless empty |
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*/ |
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public void testPollLast() { |
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ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
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for (int i = SIZE - 1; i >= 0; --i) { |
274 |
mustEqual(i, q.pollLast()); |
275 |
} |
276 |
assertNull(q.pollFirst()); |
277 |
} |
278 |
|
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/** |
280 |
* remove(x) removes x and returns true if present |
281 |
*/ |
282 |
public void testRemoveElement() { |
283 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
284 |
for (int i = 1; i < SIZE; i += 2) { |
285 |
mustContain(q, i); |
286 |
mustRemove(q, i); |
287 |
mustNotContain(q, i); |
288 |
mustContain(q, i - 1); |
289 |
} |
290 |
for (int i = 0; i < SIZE; i += 2) { |
291 |
mustContain(q, i); |
292 |
mustRemove(q, i); |
293 |
mustNotContain(q, i); |
294 |
mustNotRemove(q, i + 1); |
295 |
mustNotContain(q, i + 1); |
296 |
} |
297 |
assertTrue(q.isEmpty()); |
298 |
} |
299 |
|
300 |
/** |
301 |
* contains(x) reports true when elements added but not yet removed |
302 |
*/ |
303 |
public void testContains() { |
304 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
305 |
for (int i = 0; i < SIZE; ++i) { |
306 |
mustContain(q, i); |
307 |
q.pollFirst(); |
308 |
mustNotContain(q, i); |
309 |
} |
310 |
} |
311 |
|
312 |
/** |
313 |
* clear removes all elements |
314 |
*/ |
315 |
public void testClear() { |
316 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
317 |
q.clear(); |
318 |
assertTrue(q.isEmpty()); |
319 |
mustEqual(0, q.size()); |
320 |
mustAdd(q, one); |
321 |
assertFalse(q.isEmpty()); |
322 |
q.clear(); |
323 |
assertTrue(q.isEmpty()); |
324 |
} |
325 |
|
326 |
/** |
327 |
* containsAll(c) is true when c contains a subset of elements |
328 |
*/ |
329 |
public void testContainsAll() { |
330 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
331 |
ConcurrentSkipListSet<Item> p = new ConcurrentSkipListSet<Item>(); |
332 |
for (int i = 0; i < SIZE; ++i) { |
333 |
assertTrue(q.containsAll(p)); |
334 |
assertFalse(p.containsAll(q)); |
335 |
mustAdd(p, i); |
336 |
} |
337 |
assertTrue(p.containsAll(q)); |
338 |
} |
339 |
|
340 |
/** |
341 |
* retainAll(c) retains only those elements of c and reports true if changed |
342 |
*/ |
343 |
public void testRetainAll() { |
344 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
345 |
ConcurrentSkipListSet<Item> p = populatedSet(SIZE); |
346 |
for (int i = 0; i < SIZE; ++i) { |
347 |
boolean changed = q.retainAll(p); |
348 |
if (i == 0) |
349 |
assertFalse(changed); |
350 |
else |
351 |
assertTrue(changed); |
352 |
|
353 |
assertTrue(q.containsAll(p)); |
354 |
mustEqual(SIZE - i, q.size()); |
355 |
p.pollFirst(); |
356 |
} |
357 |
} |
358 |
|
359 |
/** |
360 |
* removeAll(c) removes only those elements of c and reports true if changed |
361 |
*/ |
362 |
public void testRemoveAll() { |
363 |
for (int i = 1; i < SIZE; ++i) { |
364 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
365 |
ConcurrentSkipListSet<Item> p = populatedSet(i); |
366 |
assertTrue(q.removeAll(p)); |
367 |
mustEqual(SIZE - i, q.size()); |
368 |
for (int j = 0; j < i; ++j) { |
369 |
mustNotContain(q, p.pollFirst()); |
370 |
} |
371 |
} |
372 |
} |
373 |
|
374 |
/** |
375 |
* lower returns preceding element |
376 |
*/ |
377 |
public void testLower() { |
378 |
ConcurrentSkipListSet<Item> q = set5(); |
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Object e1 = q.lower(three); |
380 |
mustEqual(two, e1); |
381 |
|
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Object e2 = q.lower(six); |
383 |
mustEqual(five, e2); |
384 |
|
385 |
Object e3 = q.lower(one); |
386 |
assertNull(e3); |
387 |
|
388 |
Object e4 = q.lower(zero); |
389 |
assertNull(e4); |
390 |
} |
391 |
|
392 |
/** |
393 |
* higher returns next element |
394 |
*/ |
395 |
public void testHigher() { |
396 |
ConcurrentSkipListSet<Item> q = set5(); |
397 |
Object e1 = q.higher(three); |
398 |
mustEqual(four, e1); |
399 |
|
400 |
Object e2 = q.higher(zero); |
401 |
mustEqual(one, e2); |
402 |
|
403 |
Object e3 = q.higher(five); |
404 |
assertNull(e3); |
405 |
|
406 |
Object e4 = q.higher(six); |
407 |
assertNull(e4); |
408 |
} |
409 |
|
410 |
/** |
411 |
* floor returns preceding element |
412 |
*/ |
413 |
public void testFloor() { |
414 |
ConcurrentSkipListSet<Item> q = set5(); |
415 |
Object e1 = q.floor(three); |
416 |
mustEqual(three, e1); |
417 |
|
418 |
Object e2 = q.floor(six); |
419 |
mustEqual(five, e2); |
420 |
|
421 |
Object e3 = q.floor(one); |
422 |
mustEqual(one, e3); |
423 |
|
424 |
Object e4 = q.floor(zero); |
425 |
assertNull(e4); |
426 |
} |
427 |
|
428 |
/** |
429 |
* ceiling returns next element |
430 |
*/ |
431 |
public void testCeiling() { |
432 |
ConcurrentSkipListSet<Item> q = set5(); |
433 |
Object e1 = q.ceiling(three); |
434 |
mustEqual(three, e1); |
435 |
|
436 |
Object e2 = q.ceiling(zero); |
437 |
mustEqual(one, e2); |
438 |
|
439 |
Object e3 = q.ceiling(five); |
440 |
mustEqual(five, e3); |
441 |
|
442 |
Object e4 = q.ceiling(six); |
443 |
assertNull(e4); |
444 |
} |
445 |
|
446 |
/** |
447 |
* toArray contains all elements in sorted order |
448 |
*/ |
449 |
public void testToArray() { |
450 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
451 |
Object[] a = q.toArray(); |
452 |
assertSame(Object[].class, a.getClass()); |
453 |
for (Object o : a) |
454 |
assertSame(o, q.pollFirst()); |
455 |
assertTrue(q.isEmpty()); |
456 |
} |
457 |
|
458 |
/** |
459 |
* toArray(a) contains all elements in sorted order |
460 |
*/ |
461 |
public void testToArray2() { |
462 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
463 |
Item[] items = new Item[SIZE]; |
464 |
assertSame(items, q.toArray(items)); |
465 |
for (Item o : items) |
466 |
assertSame(o, q.pollFirst()); |
467 |
assertTrue(q.isEmpty()); |
468 |
} |
469 |
|
470 |
/** |
471 |
* iterator iterates through all elements |
472 |
*/ |
473 |
public void testIterator() { |
474 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
475 |
Iterator<? extends Item> it = q.iterator(); |
476 |
int i; |
477 |
for (i = 0; it.hasNext(); i++) |
478 |
mustContain(q, it.next()); |
479 |
mustEqual(i, SIZE); |
480 |
assertIteratorExhausted(it); |
481 |
} |
482 |
|
483 |
/** |
484 |
* iterator of empty set has no elements |
485 |
*/ |
486 |
public void testEmptyIterator() { |
487 |
NavigableSet<Item> s = new ConcurrentSkipListSet<Item>(); |
488 |
assertIteratorExhausted(s.iterator()); |
489 |
assertIteratorExhausted(s.descendingSet().iterator()); |
490 |
} |
491 |
|
492 |
/** |
493 |
* iterator.remove removes current element |
494 |
*/ |
495 |
public void testIteratorRemove() { |
496 |
final ConcurrentSkipListSet<Item> q = new ConcurrentSkipListSet<Item>(); |
497 |
q.add(two); |
498 |
q.add(one); |
499 |
q.add(three); |
500 |
|
501 |
Iterator<? extends Item> it = q.iterator(); |
502 |
it.next(); |
503 |
it.remove(); |
504 |
|
505 |
it = q.iterator(); |
506 |
mustEqual(it.next(), two); |
507 |
mustEqual(it.next(), three); |
508 |
assertFalse(it.hasNext()); |
509 |
} |
510 |
|
511 |
/** |
512 |
* toString contains toStrings of elements |
513 |
*/ |
514 |
public void testToString() { |
515 |
ConcurrentSkipListSet<Item> q = populatedSet(SIZE); |
516 |
String s = q.toString(); |
517 |
for (int i = 0; i < SIZE; ++i) { |
518 |
assertTrue(s.contains(String.valueOf(i))); |
519 |
} |
520 |
} |
521 |
|
522 |
/** |
523 |
* A cloned set equals original |
524 |
*/ |
525 |
public void testClone() { |
526 |
ConcurrentSkipListSet<Item> x = populatedSet(SIZE); |
527 |
ConcurrentSkipListSet<Item> y = x.clone(); |
528 |
|
529 |
assertNotSame(x, y); |
530 |
mustEqual(x.size(), y.size()); |
531 |
mustEqual(x, y); |
532 |
mustEqual(y, x); |
533 |
while (!x.isEmpty()) { |
534 |
assertFalse(y.isEmpty()); |
535 |
mustEqual(x.pollFirst(), y.pollFirst()); |
536 |
} |
537 |
assertTrue(y.isEmpty()); |
538 |
} |
539 |
|
540 |
/** |
541 |
* A deserialized/reserialized set equals original |
542 |
*/ |
543 |
public void testSerialization() throws Exception { |
544 |
NavigableSet<Item> x = populatedSet(SIZE); |
545 |
NavigableSet<Item> y = serialClone(x); |
546 |
|
547 |
assertNotSame(x, y); |
548 |
mustEqual(x.size(), y.size()); |
549 |
mustEqual(x, y); |
550 |
mustEqual(y, x); |
551 |
while (!x.isEmpty()) { |
552 |
assertFalse(y.isEmpty()); |
553 |
mustEqual(x.pollFirst(), y.pollFirst()); |
554 |
} |
555 |
assertTrue(y.isEmpty()); |
556 |
} |
557 |
|
558 |
/** |
559 |
* subSet returns set with keys in requested range |
560 |
*/ |
561 |
public void testSubSetContents() { |
562 |
ConcurrentSkipListSet<Item> set = set5(); |
563 |
SortedSet<Item> sm = set.subSet(two, four); |
564 |
mustEqual(two, sm.first()); |
565 |
mustEqual(three, sm.last()); |
566 |
mustEqual(2, sm.size()); |
567 |
mustNotContain(sm, one); |
568 |
mustContain(sm, two); |
569 |
mustContain(sm, three); |
570 |
mustNotContain(sm, four); |
571 |
mustNotContain(sm, five); |
572 |
Iterator<? extends Item> i = sm.iterator(); |
573 |
Item k = i.next(); |
574 |
mustEqual(two, k); |
575 |
k = i.next(); |
576 |
mustEqual(three, k); |
577 |
assertFalse(i.hasNext()); |
578 |
Iterator<? extends Item> j = sm.iterator(); |
579 |
j.next(); |
580 |
j.remove(); |
581 |
mustNotContain(set, two); |
582 |
mustEqual(4, set.size()); |
583 |
mustEqual(1, sm.size()); |
584 |
mustEqual(three, sm.first()); |
585 |
mustEqual(three, sm.last()); |
586 |
mustRemove(sm, three); |
587 |
assertTrue(sm.isEmpty()); |
588 |
mustEqual(3, set.size()); |
589 |
} |
590 |
|
591 |
public void testSubSetContents2() { |
592 |
ConcurrentSkipListSet<Item> set = set5(); |
593 |
SortedSet<Item> sm = set.subSet(two, three); |
594 |
mustEqual(1, sm.size()); |
595 |
mustEqual(two, sm.first()); |
596 |
mustEqual(two, sm.last()); |
597 |
mustNotContain(sm, one); |
598 |
mustContain(sm, two); |
599 |
mustNotContain(sm, three); |
600 |
mustNotContain(sm, four); |
601 |
mustNotContain(sm, five); |
602 |
Iterator<? extends Item> i = sm.iterator(); |
603 |
Item k = i.next(); |
604 |
mustEqual(two, k); |
605 |
assertFalse(i.hasNext()); |
606 |
Iterator<? extends Item> j = sm.iterator(); |
607 |
j.next(); |
608 |
j.remove(); |
609 |
mustNotContain(set, two); |
610 |
mustEqual(4, set.size()); |
611 |
mustEqual(0, sm.size()); |
612 |
assertTrue(sm.isEmpty()); |
613 |
mustNotRemove(sm, three); |
614 |
mustEqual(4, set.size()); |
615 |
} |
616 |
|
617 |
/** |
618 |
* headSet returns set with keys in requested range |
619 |
*/ |
620 |
public void testHeadSetContents() { |
621 |
ConcurrentSkipListSet<Item> set = set5(); |
622 |
SortedSet<Item> sm = set.headSet(four); |
623 |
mustContain(sm, one); |
624 |
mustContain(sm, two); |
625 |
mustContain(sm, three); |
626 |
mustNotContain(sm, four); |
627 |
mustNotContain(sm, five); |
628 |
Iterator<? extends Item> i = sm.iterator(); |
629 |
Item k = i.next(); |
630 |
mustEqual(one, k); |
631 |
k = i.next(); |
632 |
mustEqual(two, k); |
633 |
k = i.next(); |
634 |
mustEqual(three, k); |
635 |
assertFalse(i.hasNext()); |
636 |
sm.clear(); |
637 |
assertTrue(sm.isEmpty()); |
638 |
mustEqual(2, set.size()); |
639 |
mustEqual(four, set.first()); |
640 |
} |
641 |
|
642 |
/** |
643 |
* tailSet returns set with keys in requested range |
644 |
*/ |
645 |
public void testTailSetContents() { |
646 |
ConcurrentSkipListSet<Item> set = set5(); |
647 |
SortedSet<Item> sm = set.tailSet(two); |
648 |
mustNotContain(sm, one); |
649 |
mustContain(sm, two); |
650 |
mustContain(sm, three); |
651 |
mustContain(sm, four); |
652 |
mustContain(sm, five); |
653 |
mustContain(sm, two); |
654 |
Iterator<? extends Item> i = sm.iterator(); |
655 |
Item k = i.next(); |
656 |
mustEqual(two, k); |
657 |
k = i.next(); |
658 |
mustEqual(three, k); |
659 |
k = i.next(); |
660 |
mustEqual(four, k); |
661 |
k = i.next(); |
662 |
mustEqual(five, k); |
663 |
assertFalse(i.hasNext()); |
664 |
|
665 |
SortedSet<Item> ssm = sm.tailSet(four); |
666 |
mustEqual(four, ssm.first()); |
667 |
mustEqual(five, ssm.last()); |
668 |
mustRemove(ssm, four); |
669 |
mustEqual(1, ssm.size()); |
670 |
mustEqual(3, sm.size()); |
671 |
mustEqual(4, set.size()); |
672 |
} |
673 |
|
674 |
Random rnd = new Random(666); |
675 |
|
676 |
/** |
677 |
* Subsets of subsets subdivide correctly |
678 |
*/ |
679 |
public void testRecursiveSubSets() throws Exception { |
680 |
int setSize = expensiveTests ? 1000 : 100; |
681 |
Class<?> cl = ConcurrentSkipListSet.class; |
682 |
|
683 |
NavigableSet<Item> set = newSet(cl); |
684 |
BitSet bs = new BitSet(setSize); |
685 |
|
686 |
populate(set, setSize, bs); |
687 |
check(set, 0, setSize - 1, true, bs); |
688 |
check(set.descendingSet(), 0, setSize - 1, false, bs); |
689 |
|
690 |
mutateSet(set, 0, setSize - 1, bs); |
691 |
check(set, 0, setSize - 1, true, bs); |
692 |
check(set.descendingSet(), 0, setSize - 1, false, bs); |
693 |
|
694 |
bashSubSet(set.subSet(zero, true, itemFor(setSize), false), |
695 |
0, setSize - 1, true, bs); |
696 |
} |
697 |
|
698 |
/** |
699 |
* addAll is idempotent |
700 |
*/ |
701 |
public void testAddAll_idempotent() throws Exception { |
702 |
Set<Item> x = populatedSet(SIZE); |
703 |
Set<Item> y = new ConcurrentSkipListSet<Item>(x); |
704 |
y.addAll(x); |
705 |
mustEqual(x, y); |
706 |
mustEqual(y, x); |
707 |
} |
708 |
|
709 |
static NavigableSet<Item> newSet(Class<?> cl) throws Exception { |
710 |
@SuppressWarnings("unchecked") |
711 |
NavigableSet<Item> result = |
712 |
(NavigableSet<Item>) cl.getConstructor().newInstance(); |
713 |
mustEqual(0, result.size()); |
714 |
assertFalse(result.iterator().hasNext()); |
715 |
return result; |
716 |
} |
717 |
|
718 |
void populate(NavigableSet<Item> set, int limit, BitSet bs) { |
719 |
for (int i = 0, n = 2 * limit / 3; i < n; i++) { |
720 |
int element = rnd.nextInt(limit); |
721 |
put(set, element, bs); |
722 |
} |
723 |
} |
724 |
|
725 |
void mutateSet(NavigableSet<Item> set, int min, int max, BitSet bs) { |
726 |
int size = set.size(); |
727 |
int rangeSize = max - min + 1; |
728 |
|
729 |
// Remove a bunch of entries directly |
730 |
for (int i = 0, n = rangeSize / 2; i < n; i++) { |
731 |
remove(set, min - 5 + rnd.nextInt(rangeSize + 10), bs); |
732 |
} |
733 |
|
734 |
// Remove a bunch of entries with iterator |
735 |
for (Iterator<Item> it = set.iterator(); it.hasNext(); ) { |
736 |
if (rnd.nextBoolean()) { |
737 |
bs.clear(it.next().value); |
738 |
it.remove(); |
739 |
} |
740 |
} |
741 |
|
742 |
// Add entries till we're back to original size |
743 |
while (set.size() < size) { |
744 |
int element = min + rnd.nextInt(rangeSize); |
745 |
assertTrue(element >= min && element <= max); |
746 |
put(set, element, bs); |
747 |
} |
748 |
} |
749 |
|
750 |
void mutateSubSet(NavigableSet<Item> set, int min, int max, |
751 |
BitSet bs) { |
752 |
int size = set.size(); |
753 |
int rangeSize = max - min + 1; |
754 |
|
755 |
// Remove a bunch of entries directly |
756 |
for (int i = 0, n = rangeSize / 2; i < n; i++) { |
757 |
remove(set, min - 5 + rnd.nextInt(rangeSize + 10), bs); |
758 |
} |
759 |
|
760 |
// Remove a bunch of entries with iterator |
761 |
for (Iterator<Item> it = set.iterator(); it.hasNext(); ) { |
762 |
if (rnd.nextBoolean()) { |
763 |
bs.clear(it.next().value); |
764 |
it.remove(); |
765 |
} |
766 |
} |
767 |
|
768 |
// Add entries till we're back to original size |
769 |
while (set.size() < size) { |
770 |
int element = min - 5 + rnd.nextInt(rangeSize + 10); |
771 |
if (element >= min && element <= max) { |
772 |
put(set, element, bs); |
773 |
} else { |
774 |
try { |
775 |
set.add(itemFor(element)); |
776 |
shouldThrow(); |
777 |
} catch (IllegalArgumentException success) {} |
778 |
} |
779 |
} |
780 |
} |
781 |
|
782 |
void put(NavigableSet<Item> set, int element, BitSet bs) { |
783 |
if (set.add(itemFor(element))) |
784 |
bs.set(element); |
785 |
} |
786 |
|
787 |
void remove(NavigableSet<Item> set, int element, BitSet bs) { |
788 |
if (set.remove(itemFor(element))) |
789 |
bs.clear(element); |
790 |
} |
791 |
|
792 |
void bashSubSet(NavigableSet<Item> set, |
793 |
int min, int max, boolean ascending, |
794 |
BitSet bs) { |
795 |
check(set, min, max, ascending, bs); |
796 |
check(set.descendingSet(), min, max, !ascending, bs); |
797 |
|
798 |
mutateSubSet(set, min, max, bs); |
799 |
check(set, min, max, ascending, bs); |
800 |
check(set.descendingSet(), min, max, !ascending, bs); |
801 |
|
802 |
// Recurse |
803 |
if (max - min < 2) |
804 |
return; |
805 |
int midPoint = (min + max) / 2; |
806 |
|
807 |
// headSet - pick direction and endpoint inclusion randomly |
808 |
boolean incl = rnd.nextBoolean(); |
809 |
NavigableSet<Item> hm = set.headSet(itemFor(midPoint), incl); |
810 |
if (ascending) { |
811 |
if (rnd.nextBoolean()) |
812 |
bashSubSet(hm, min, midPoint - (incl ? 0 : 1), true, bs); |
813 |
else |
814 |
bashSubSet(hm.descendingSet(), min, midPoint - (incl ? 0 : 1), |
815 |
false, bs); |
816 |
} else { |
817 |
if (rnd.nextBoolean()) |
818 |
bashSubSet(hm, midPoint + (incl ? 0 : 1), max, false, bs); |
819 |
else |
820 |
bashSubSet(hm.descendingSet(), midPoint + (incl ? 0 : 1), max, |
821 |
true, bs); |
822 |
} |
823 |
|
824 |
// tailSet - pick direction and endpoint inclusion randomly |
825 |
incl = rnd.nextBoolean(); |
826 |
NavigableSet<Item> tm = set.tailSet(itemFor(midPoint),incl); |
827 |
if (ascending) { |
828 |
if (rnd.nextBoolean()) |
829 |
bashSubSet(tm, midPoint + (incl ? 0 : 1), max, true, bs); |
830 |
else |
831 |
bashSubSet(tm.descendingSet(), midPoint + (incl ? 0 : 1), max, |
832 |
false, bs); |
833 |
} else { |
834 |
if (rnd.nextBoolean()) { |
835 |
bashSubSet(tm, min, midPoint - (incl ? 0 : 1), false, bs); |
836 |
} else { |
837 |
bashSubSet(tm.descendingSet(), min, midPoint - (incl ? 0 : 1), |
838 |
true, bs); |
839 |
} |
840 |
} |
841 |
|
842 |
// subSet - pick direction and endpoint inclusion randomly |
843 |
int rangeSize = max - min + 1; |
844 |
int[] endpoints = new int[2]; |
845 |
endpoints[0] = min + rnd.nextInt(rangeSize); |
846 |
endpoints[1] = min + rnd.nextInt(rangeSize); |
847 |
Arrays.sort(endpoints); |
848 |
boolean lowIncl = rnd.nextBoolean(); |
849 |
boolean highIncl = rnd.nextBoolean(); |
850 |
if (ascending) { |
851 |
NavigableSet<Item> sm = set.subSet( |
852 |
itemFor(endpoints[0]), lowIncl, itemFor(endpoints[1]), highIncl); |
853 |
if (rnd.nextBoolean()) |
854 |
bashSubSet(sm, endpoints[0] + (lowIncl ? 0 : 1), |
855 |
endpoints[1] - (highIncl ? 0 : 1), true, bs); |
856 |
else |
857 |
bashSubSet(sm.descendingSet(), endpoints[0] + (lowIncl ? 0 : 1), |
858 |
endpoints[1] - (highIncl ? 0 : 1), false, bs); |
859 |
} else { |
860 |
NavigableSet<Item> sm = set.subSet( |
861 |
itemFor(endpoints[1]), highIncl, itemFor(endpoints[0]), lowIncl); |
862 |
if (rnd.nextBoolean()) |
863 |
bashSubSet(sm, endpoints[0] + (lowIncl ? 0 : 1), |
864 |
endpoints[1] - (highIncl ? 0 : 1), false, bs); |
865 |
else |
866 |
bashSubSet(sm.descendingSet(), endpoints[0] + (lowIncl ? 0 : 1), |
867 |
endpoints[1] - (highIncl ? 0 : 1), true, bs); |
868 |
} |
869 |
} |
870 |
|
871 |
/** |
872 |
* min and max are both inclusive. If max < min, interval is empty. |
873 |
*/ |
874 |
void check(NavigableSet<Item> set, |
875 |
final int min, final int max, final boolean ascending, |
876 |
final BitSet bs) { |
877 |
class ReferenceSet { |
878 |
int lower(int element) { |
879 |
return ascending ? |
880 |
lowerAscending(element) : higherAscending(element); |
881 |
} |
882 |
int floor(int element) { |
883 |
return ascending ? |
884 |
floorAscending(element) : ceilingAscending(element); |
885 |
} |
886 |
int ceiling(int element) { |
887 |
return ascending ? |
888 |
ceilingAscending(element) : floorAscending(element); |
889 |
} |
890 |
int higher(int element) { |
891 |
return ascending ? |
892 |
higherAscending(element) : lowerAscending(element); |
893 |
} |
894 |
int first() { |
895 |
return ascending ? firstAscending() : lastAscending(); |
896 |
} |
897 |
int last() { |
898 |
return ascending ? lastAscending() : firstAscending(); |
899 |
} |
900 |
int lowerAscending(int element) { |
901 |
return floorAscending(element - 1); |
902 |
} |
903 |
int floorAscending(int element) { |
904 |
if (element < min) |
905 |
return -1; |
906 |
else if (element > max) |
907 |
element = max; |
908 |
|
909 |
// BitSet should support this! Test would run much faster |
910 |
while (element >= min) { |
911 |
if (bs.get(element)) |
912 |
return element; |
913 |
element--; |
914 |
} |
915 |
return -1; |
916 |
} |
917 |
int ceilingAscending(int element) { |
918 |
if (element < min) |
919 |
element = min; |
920 |
else if (element > max) |
921 |
return -1; |
922 |
int result = bs.nextSetBit(element); |
923 |
return result > max ? -1 : result; |
924 |
} |
925 |
int higherAscending(int element) { |
926 |
return ceilingAscending(element + 1); |
927 |
} |
928 |
private int firstAscending() { |
929 |
int result = ceilingAscending(min); |
930 |
return result > max ? -1 : result; |
931 |
} |
932 |
private int lastAscending() { |
933 |
int result = floorAscending(max); |
934 |
return result < min ? -1 : result; |
935 |
} |
936 |
} |
937 |
ReferenceSet rs = new ReferenceSet(); |
938 |
|
939 |
// Test contents using containsElement |
940 |
int size = 0; |
941 |
for (int i = min; i <= max; i++) { |
942 |
boolean bsContainsI = bs.get(i); |
943 |
mustEqual(bsContainsI, set.contains(itemFor(i))); |
944 |
if (bsContainsI) |
945 |
size++; |
946 |
} |
947 |
mustEqual(size, set.size()); |
948 |
|
949 |
// Test contents using contains elementSet iterator |
950 |
int size2 = 0; |
951 |
int previousElement = -1; |
952 |
for (Item element : set) { |
953 |
assertTrue(bs.get(element.value)); |
954 |
size2++; |
955 |
assertTrue(previousElement < 0 || (ascending ? |
956 |
element.value - previousElement > 0 : element.value - previousElement < 0)); |
957 |
previousElement = element.value; |
958 |
} |
959 |
mustEqual(size2, size); |
960 |
|
961 |
// Test navigation ops |
962 |
for (int element = min - 1; element <= max + 1; element++) { |
963 |
Item e = itemFor(element); |
964 |
assertEq(set.lower(e), rs.lower(element)); |
965 |
assertEq(set.floor(e), rs.floor(element)); |
966 |
assertEq(set.higher(e), rs.higher(element)); |
967 |
assertEq(set.ceiling(e), rs.ceiling(element)); |
968 |
} |
969 |
|
970 |
// Test extrema |
971 |
if (set.size() != 0) { |
972 |
assertEq(set.first(), rs.first()); |
973 |
assertEq(set.last(), rs.last()); |
974 |
} else { |
975 |
mustEqual(rs.first(), -1); |
976 |
mustEqual(rs.last(), -1); |
977 |
try { |
978 |
set.first(); |
979 |
shouldThrow(); |
980 |
} catch (NoSuchElementException success) {} |
981 |
try { |
982 |
set.last(); |
983 |
shouldThrow(); |
984 |
} catch (NoSuchElementException success) {} |
985 |
} |
986 |
} |
987 |
|
988 |
static void assertEq(Item i, int j) { |
989 |
if (i == null) |
990 |
mustEqual(j, -1); |
991 |
else |
992 |
mustEqual(i, j); |
993 |
} |
994 |
|
995 |
static boolean eq(Item i, int j) { |
996 |
return (i == null) ? j == -1 : i.value == j; |
997 |
} |
998 |
|
999 |
} |