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dl |
1.1 |
/* |
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dl |
1.6 |
* 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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jsr166 |
1.17 |
* http://creativecommons.org/publicdomain/zero/1.0/ |
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jsr166 |
1.8 |
* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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dl |
1.1 |
*/ |
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import junit.framework.*; |
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jsr166 |
1.19 |
import java.util.Arrays; |
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jsr166 |
1.22 |
import java.util.Collection; |
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jsr166 |
1.21 |
import java.util.Collections; |
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jsr166 |
1.19 |
import java.util.Iterator; |
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import java.util.Set; |
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import java.util.Vector; |
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import java.util.concurrent.CopyOnWriteArraySet; |
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dl |
1.1 |
|
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dl |
1.3 |
public class CopyOnWriteArraySetTest extends JSR166TestCase { |
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dl |
1.1 |
public static void main(String[] args) { |
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jsr166 |
1.15 |
junit.textui.TestRunner.run(suite()); |
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dl |
1.1 |
} |
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public static Test suite() { |
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jsr166 |
1.11 |
return new TestSuite(CopyOnWriteArraySetTest.class); |
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dl |
1.1 |
} |
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jsr166 |
1.21 |
static CopyOnWriteArraySet<Integer> populatedSet(int n) { |
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CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>(); |
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dl |
1.1 |
assertTrue(a.isEmpty()); |
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jsr166 |
1.22 |
for (int i = 0; i < n; i++) |
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jsr166 |
1.21 |
a.add(i); |
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1.1 |
assertFalse(a.isEmpty()); |
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assertEquals(n, a.size()); |
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return a; |
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} |
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jsr166 |
1.21 |
static CopyOnWriteArraySet populatedSet(Integer[] elements) { |
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CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>(); |
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assertTrue(a.isEmpty()); |
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for (int i = 0; i < elements.length; i++) |
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a.add(elements[i]); |
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assertFalse(a.isEmpty()); |
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assertEquals(elements.length, a.size()); |
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return a; |
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} |
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dl |
1.4 |
/** |
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* Default-constructed set is empty |
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*/ |
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1.3 |
public void testConstructor() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet a = new CopyOnWriteArraySet(); |
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1.3 |
assertTrue(a.isEmpty()); |
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} |
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dl |
1.4 |
/** |
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1.5 |
* Collection-constructed set holds all of its elements |
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dl |
1.4 |
*/ |
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1.3 |
public void testConstructor3() { |
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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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jsr166 |
1.11 |
CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints)); |
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jsr166 |
1.8 |
for (int i = 0; i < SIZE; ++i) |
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1.3 |
assertTrue(a.contains(ints[i])); |
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} |
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jsr166 |
1.8 |
|
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dl |
1.1 |
/** |
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jsr166 |
1.16 |
* addAll adds each element from the given collection |
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dl |
1.1 |
*/ |
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1.4 |
public void testAddAll() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
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Vector v = new Vector(); |
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v.add(three); |
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v.add(four); |
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v.add(five); |
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full.addAll(v); |
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assertEquals(6, full.size()); |
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1.1 |
} |
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/** |
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jsr166 |
1.16 |
* addAll adds each element from the given collection that did not |
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* already exist in the set |
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dl |
1.1 |
*/ |
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dl |
1.4 |
public void testAddAll2() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
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Vector v = new Vector(); |
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v.add(three); |
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v.add(four); |
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v.add(one); // will not add this element |
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full.addAll(v); |
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assertEquals(5, full.size()); |
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1.1 |
} |
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/** |
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jsr166 |
1.16 |
* add will not add the element if it already exists in the set |
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dl |
1.1 |
*/ |
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dl |
1.4 |
public void testAdd2() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
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full.add(one); |
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assertEquals(3, full.size()); |
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dl |
1.1 |
} |
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/** |
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jsr166 |
1.16 |
* add adds the element when it does not exist in the set |
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dl |
1.1 |
*/ |
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dl |
1.4 |
public void testAdd3() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
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dl |
1.3 |
full.add(three); |
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assertTrue(full.contains(three)); |
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dl |
1.1 |
} |
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/** |
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jsr166 |
1.16 |
* clear removes all elements from the set |
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dl |
1.1 |
*/ |
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dl |
1.4 |
public void testClear() { |
115 |
jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
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full.clear(); |
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assertEquals(0, full.size()); |
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dl |
1.1 |
} |
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120 |
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/** |
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jsr166 |
1.16 |
* contains returns true for added elements |
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dl |
1.1 |
*/ |
123 |
dl |
1.4 |
public void testContains() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
125 |
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assertTrue(full.contains(one)); |
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assertFalse(full.contains(five)); |
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dl |
1.1 |
} |
128 |
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dl |
1.4 |
/** |
130 |
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* Sets with equal elements are equal |
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*/ |
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dl |
1.1 |
public void testEquals() { |
133 |
jsr166 |
1.11 |
CopyOnWriteArraySet a = populatedSet(3); |
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CopyOnWriteArraySet b = populatedSet(3); |
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dl |
1.1 |
assertTrue(a.equals(b)); |
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assertTrue(b.equals(a)); |
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assertEquals(a.hashCode(), b.hashCode()); |
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dl |
1.3 |
a.add(m1); |
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dl |
1.1 |
assertFalse(a.equals(b)); |
140 |
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assertFalse(b.equals(a)); |
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dl |
1.3 |
b.add(m1); |
142 |
dl |
1.1 |
assertTrue(a.equals(b)); |
143 |
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assertTrue(b.equals(a)); |
144 |
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assertEquals(a.hashCode(), b.hashCode()); |
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} |
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147 |
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/** |
148 |
jsr166 |
1.16 |
* containsAll returns true for collections with subset of elements |
149 |
dl |
1.1 |
*/ |
150 |
dl |
1.4 |
public void testContainsAll() { |
151 |
jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
152 |
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Vector v = new Vector(); |
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v.add(one); |
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v.add(two); |
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assertTrue(full.containsAll(v)); |
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v.add(six); |
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assertFalse(full.containsAll(v)); |
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dl |
1.1 |
} |
159 |
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160 |
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/** |
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jsr166 |
1.16 |
* isEmpty is true when empty, else false |
162 |
dl |
1.1 |
*/ |
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dl |
1.4 |
public void testIsEmpty() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
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CopyOnWriteArraySet full = populatedSet(3); |
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assertTrue(empty.isEmpty()); |
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assertFalse(full.isEmpty()); |
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dl |
1.1 |
} |
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170 |
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/** |
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jsr166 |
1.16 |
* iterator() returns an iterator containing the elements of the set |
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dl |
1.1 |
*/ |
173 |
dl |
1.4 |
public void testIterator() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
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Iterator i = full.iterator(); |
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int j; |
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for (j = 0; i.hasNext(); j++) |
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jsr166 |
1.14 |
assertEquals(j, i.next()); |
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jsr166 |
1.11 |
assertEquals(3, j); |
180 |
dl |
1.1 |
} |
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dl |
1.4 |
/** |
183 |
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* iterator remove is unsupported |
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*/ |
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jsr166 |
1.15 |
public void testIteratorRemove() { |
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jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
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dl |
1.1 |
Iterator it = full.iterator(); |
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it.next(); |
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try { |
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it.remove(); |
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dl |
1.4 |
shouldThrow(); |
192 |
jsr166 |
1.12 |
} catch (UnsupportedOperationException success) {} |
193 |
dl |
1.1 |
} |
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dl |
1.4 |
/** |
196 |
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* toString holds toString of elements |
197 |
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*/ |
198 |
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public void testToString() { |
199 |
jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
200 |
dl |
1.1 |
String s = full.toString(); |
201 |
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for (int i = 0; i < 3; ++i) { |
202 |
jsr166 |
1.18 |
assertTrue(s.contains(String.valueOf(i))); |
203 |
dl |
1.1 |
} |
204 |
jsr166 |
1.8 |
} |
205 |
dl |
1.1 |
|
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/** |
207 |
jsr166 |
1.16 |
* removeAll removes all elements from the given collection |
208 |
dl |
1.1 |
*/ |
209 |
dl |
1.4 |
public void testRemoveAll() { |
210 |
jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
211 |
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Vector v = new Vector(); |
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v.add(one); |
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v.add(two); |
214 |
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full.removeAll(v); |
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assertEquals(1, full.size()); |
216 |
dl |
1.1 |
} |
217 |
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218 |
dl |
1.4 |
/** |
219 |
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* remove removes an element |
220 |
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*/ |
221 |
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public void testRemove() { |
222 |
jsr166 |
1.11 |
CopyOnWriteArraySet full = populatedSet(3); |
223 |
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full.remove(one); |
224 |
dl |
1.3 |
assertFalse(full.contains(one)); |
225 |
jsr166 |
1.11 |
assertEquals(2, full.size()); |
226 |
dl |
1.1 |
} |
227 |
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228 |
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/** |
229 |
jsr166 |
1.16 |
* size returns the number of elements |
230 |
dl |
1.1 |
*/ |
231 |
dl |
1.4 |
public void testSize() { |
232 |
jsr166 |
1.11 |
CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
233 |
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CopyOnWriteArraySet full = populatedSet(3); |
234 |
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assertEquals(3, full.size()); |
235 |
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assertEquals(0, empty.size()); |
236 |
dl |
1.1 |
} |
237 |
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238 |
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/** |
239 |
jsr166 |
1.21 |
* toArray() returns an Object array containing all elements from |
240 |
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* the set in insertion order |
241 |
dl |
1.1 |
*/ |
242 |
dl |
1.4 |
public void testToArray() { |
243 |
jsr166 |
1.21 |
Object[] a = new CopyOnWriteArraySet().toArray(); |
244 |
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assertTrue(Arrays.equals(new Object[0], a)); |
245 |
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assertSame(Object[].class, a.getClass()); |
246 |
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247 |
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Integer[] elements = new Integer[SIZE]; |
248 |
jsr166 |
1.20 |
for (int i = 0; i < SIZE; i++) |
249 |
jsr166 |
1.21 |
elements[i] = i; |
250 |
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Collections.shuffle(Arrays.asList(elements)); |
251 |
jsr166 |
1.22 |
Collection<Integer> full = populatedSet(elements); |
252 |
jsr166 |
1.21 |
|
253 |
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assertTrue(Arrays.equals(elements, full.toArray())); |
254 |
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assertSame(Object[].class, full.toArray().getClass()); |
255 |
dl |
1.1 |
} |
256 |
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257 |
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/** |
258 |
jsr166 |
1.21 |
* toArray(Integer array) returns an Integer array containing all |
259 |
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* elements from the set in insertion order |
260 |
dl |
1.1 |
*/ |
261 |
dl |
1.4 |
public void testToArray2() { |
262 |
jsr166 |
1.22 |
Collection empty = new CopyOnWriteArraySet(); |
263 |
jsr166 |
1.21 |
Integer[] a; |
264 |
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265 |
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a = new Integer[0]; |
266 |
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assertSame(a, empty.toArray(a)); |
267 |
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268 |
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a = new Integer[SIZE/2]; |
269 |
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Arrays.fill(a, 42); |
270 |
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assertSame(a, empty.toArray(a)); |
271 |
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assertNull(a[0]); |
272 |
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for (int i = 1; i < a.length; i++) |
273 |
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assertEquals(42, (int) a[i]); |
274 |
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275 |
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Integer[] elements = new Integer[SIZE]; |
276 |
jsr166 |
1.20 |
for (int i = 0; i < SIZE; i++) |
277 |
jsr166 |
1.21 |
elements[i] = i; |
278 |
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Collections.shuffle(Arrays.asList(elements)); |
279 |
jsr166 |
1.22 |
Collection<Integer> full = populatedSet(elements); |
280 |
jsr166 |
1.21 |
|
281 |
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Arrays.fill(a, 42); |
282 |
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assertTrue(Arrays.equals(elements, full.toArray(a))); |
283 |
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for (int i = 0; i < a.length; i++) |
284 |
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assertEquals(42, (int) a[i]); |
285 |
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assertSame(Integer[].class, full.toArray(a).getClass()); |
286 |
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287 |
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a = new Integer[SIZE]; |
288 |
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Arrays.fill(a, 42); |
289 |
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assertSame(a, full.toArray(a)); |
290 |
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assertTrue(Arrays.equals(elements, a)); |
291 |
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292 |
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a = new Integer[2*SIZE]; |
293 |
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Arrays.fill(a, 42); |
294 |
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assertSame(a, full.toArray(a)); |
295 |
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assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE))); |
296 |
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assertNull(a[SIZE]); |
297 |
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for (int i = SIZE + 1; i < a.length; i++) |
298 |
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assertEquals(42, (int) a[i]); |
299 |
dl |
1.1 |
} |
300 |
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301 |
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/** |
302 |
jsr166 |
1.16 |
* toArray throws an ArrayStoreException when the given array can |
303 |
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* not store the objects inside the set |
304 |
dl |
1.1 |
*/ |
305 |
dl |
1.4 |
public void testToArray_ArrayStoreException() { |
306 |
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try { |
307 |
dl |
1.1 |
CopyOnWriteArraySet c = new CopyOnWriteArraySet(); |
308 |
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c.add("zfasdfsdf"); |
309 |
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c.add("asdadasd"); |
310 |
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c.toArray(new Long[5]); |
311 |
jsr166 |
1.11 |
shouldThrow(); |
312 |
jsr166 |
1.13 |
} catch (ArrayStoreException success) {} |
313 |
dl |
1.2 |
} |
314 |
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|
315 |
dl |
1.4 |
/** |
316 |
dl |
1.7 |
* A deserialized serialized set is equal |
317 |
dl |
1.4 |
*/ |
318 |
jsr166 |
1.12 |
public void testSerialization() throws Exception { |
319 |
jsr166 |
1.19 |
Set x = populatedSet(SIZE); |
320 |
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Set y = serialClone(x); |
321 |
dl |
1.2 |
|
322 |
jsr166 |
1.19 |
assertTrue(x != y); |
323 |
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assertEquals(x.size(), y.size()); |
324 |
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assertEquals(x, y); |
325 |
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assertEquals(y, x); |
326 |
dl |
1.1 |
} |
327 |
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328 |
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} |