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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/licenses/publicdomain |
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* http://creativecommons.org/publicdomain/zero/1.0/ |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
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*/ |
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.io.*; |
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import java.util.ArrayList; |
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import java.util.Arrays; |
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import java.util.Collection; |
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import java.util.Collections; |
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import java.util.Iterator; |
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import java.util.NoSuchElementException; |
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import java.util.Set; |
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import java.util.concurrent.CopyOnWriteArraySet; |
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|
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import junit.framework.Test; |
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import junit.framework.TestSuite; |
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public class CopyOnWriteArraySetTest extends JSR166TestCase { |
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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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(CopyOnWriteArraySetTest.class); |
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} |
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static CopyOnWriteArraySet populatedSet(int n) { |
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CopyOnWriteArraySet a = new CopyOnWriteArraySet(); |
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static CopyOnWriteArraySet<Integer> populatedSet(int n) { |
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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 < n; ++i) |
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a.add(new Integer(i)); |
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assertFalse(a.isEmpty()); |
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for (int i = 0; i < n; i++) |
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a.add(i); |
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assertEquals(n == 0, a.isEmpty()); |
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assertEquals(n, a.size()); |
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return a; |
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} |
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|
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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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|
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/** |
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* Default-constructed set is empty |
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*/ |
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*/ |
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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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for (int i = 0; i < SIZE - 1; ++i) |
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ints[i] = new Integer(i); |
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CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints)); |
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for (int i = 0; i < SIZE; ++i) |
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assertTrue(a.contains(ints[i])); |
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} |
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|
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|
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/** |
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* addAll adds each element from the given collection |
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* addAll adds each non-duplicate element from the given collection |
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*/ |
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public void testAddAll() { |
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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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Set full = populatedSet(3); |
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assertTrue(full.addAll(Arrays.asList(three, four, five))); |
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assertEquals(6, full.size()); |
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assertFalse(full.addAll(Arrays.asList(three, four, five))); |
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assertEquals(6, full.size()); |
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} |
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|
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/** |
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* addAll adds each element from the given collection that did not |
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* already exist in the set |
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* addAll adds each non-duplicate element from the given collection |
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*/ |
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public void testAddAll2() { |
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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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Set full = populatedSet(3); |
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// "one" is duplicate and will not be added |
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assertTrue(full.addAll(Arrays.asList(three, four, one))); |
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assertEquals(5, full.size()); |
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assertFalse(full.addAll(Arrays.asList(three, four, one))); |
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assertEquals(5, full.size()); |
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} |
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|
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/** |
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* add will not add the element if it already exists in the set |
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* add will not add the element if it already exists in the set |
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*/ |
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public void testAdd2() { |
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CopyOnWriteArraySet full = populatedSet(3); |
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Set full = populatedSet(3); |
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full.add(one); |
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assertEquals(3, full.size()); |
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} |
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/** |
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* add adds the element when it does not exist |
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* in the set |
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* add adds the element when it does not exist in the set |
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*/ |
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public void testAdd3() { |
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CopyOnWriteArraySet full = populatedSet(3); |
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Set full = populatedSet(3); |
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full.add(three); |
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assertTrue(full.contains(three)); |
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} |
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|
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/** |
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* clear removes all elements from the set |
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* clear removes all elements from the set |
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*/ |
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public void testClear() { |
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CopyOnWriteArraySet full = populatedSet(3); |
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Collection full = populatedSet(3); |
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full.clear(); |
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assertEquals(0, full.size()); |
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assertTrue(full.isEmpty()); |
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} |
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|
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/** |
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* contains returns true for added elements |
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* contains returns true for added elements |
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*/ |
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public void testContains() { |
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CopyOnWriteArraySet full = populatedSet(3); |
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Collection full = populatedSet(3); |
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assertTrue(full.contains(one)); |
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assertFalse(full.contains(five)); |
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} |
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assertEquals(a.hashCode(), b.hashCode()); |
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} |
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|
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|
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/** |
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* containsAll returns true for collections with subset of elements |
148 |
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* containsAll returns true for collections with subset of elements |
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*/ |
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public void testContainsAll() { |
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CopyOnWriteArraySet full = populatedSet(3); |
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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)); |
156 |
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v.add(six); |
146 |
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assertFalse(full.containsAll(v)); |
151 |
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Collection full = populatedSet(3); |
152 |
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assertTrue(full.containsAll(Arrays.asList())); |
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assertTrue(full.containsAll(Arrays.asList(one))); |
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assertTrue(full.containsAll(Arrays.asList(one, two))); |
155 |
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assertFalse(full.containsAll(Arrays.asList(one, two, six))); |
156 |
> |
assertFalse(full.containsAll(Arrays.asList(six))); |
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} |
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|
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/** |
160 |
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* isEmpty is true when empty, else false |
160 |
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* isEmpty is true when empty, else false |
161 |
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*/ |
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public void testIsEmpty() { |
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CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
164 |
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CopyOnWriteArraySet full = populatedSet(3); |
155 |
< |
assertTrue(empty.isEmpty()); |
156 |
< |
assertFalse(full.isEmpty()); |
163 |
> |
assertTrue(populatedSet(0).isEmpty()); |
164 |
> |
assertFalse(populatedSet(3).isEmpty()); |
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} |
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|
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/** |
168 |
< |
* iterator() returns an iterator containing the elements of the set |
168 |
> |
* iterator() returns an iterator containing the elements of the |
169 |
> |
* set in insertion order |
170 |
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*/ |
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public void testIterator() { |
172 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
173 |
< |
Iterator i = full.iterator(); |
174 |
< |
int j; |
175 |
< |
for (j = 0; i.hasNext(); j++) |
176 |
< |
assertEquals(j, i.next()); |
177 |
< |
assertEquals(3, j); |
172 |
> |
Collection empty = new CopyOnWriteArraySet(); |
173 |
> |
assertFalse(empty.iterator().hasNext()); |
174 |
> |
try { |
175 |
> |
empty.iterator().next(); |
176 |
> |
shouldThrow(); |
177 |
> |
} catch (NoSuchElementException success) {} |
178 |
> |
|
179 |
> |
Integer[] elements = new Integer[SIZE]; |
180 |
> |
for (int i = 0; i < SIZE; i++) |
181 |
> |
elements[i] = i; |
182 |
> |
Collections.shuffle(Arrays.asList(elements)); |
183 |
> |
Collection<Integer> full = populatedSet(elements); |
184 |
> |
|
185 |
> |
Iterator it = full.iterator(); |
186 |
> |
for (int j = 0; j < SIZE; j++) { |
187 |
> |
assertTrue(it.hasNext()); |
188 |
> |
assertEquals(elements[j], it.next()); |
189 |
> |
} |
190 |
> |
assertIteratorExhausted(it); |
191 |
> |
} |
192 |
> |
|
193 |
> |
/** |
194 |
> |
* iterator of empty collection has no elements |
195 |
> |
*/ |
196 |
> |
public void testEmptyIterator() { |
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> |
assertIteratorExhausted(new CopyOnWriteArraySet().iterator()); |
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} |
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|
200 |
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/** |
201 |
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* iterator remove is unsupported |
202 |
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*/ |
203 |
< |
public void testIteratorRemove () { |
204 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
203 |
> |
public void testIteratorRemove() { |
204 |
> |
Collection full = populatedSet(3); |
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Iterator it = full.iterator(); |
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it.next(); |
207 |
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try { |
214 |
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* toString holds toString of elements |
215 |
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*/ |
216 |
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public void testToString() { |
217 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
217 |
> |
assertEquals("[]", new CopyOnWriteArraySet().toString()); |
218 |
> |
Collection full = populatedSet(3); |
219 |
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String s = full.toString(); |
220 |
< |
for (int i = 0; i < 3; ++i) { |
221 |
< |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
222 |
< |
} |
220 |
> |
for (int i = 0; i < 3; ++i) |
221 |
> |
assertTrue(s.contains(String.valueOf(i))); |
222 |
> |
assertEquals(new ArrayList(full).toString(), |
223 |
> |
full.toString()); |
224 |
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} |
225 |
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|
195 |
– |
|
226 |
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/** |
227 |
< |
* removeAll removes all elements from the given collection |
227 |
> |
* removeAll removes all elements from the given collection |
228 |
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*/ |
229 |
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public void testRemoveAll() { |
230 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
231 |
< |
Vector v = new Vector(); |
232 |
< |
v.add(one); |
233 |
< |
v.add(two); |
204 |
< |
full.removeAll(v); |
230 |
> |
Set full = populatedSet(3); |
231 |
> |
assertTrue(full.removeAll(Arrays.asList(one, two))); |
232 |
> |
assertEquals(1, full.size()); |
233 |
> |
assertFalse(full.removeAll(Arrays.asList(one, two))); |
234 |
|
assertEquals(1, full.size()); |
235 |
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} |
236 |
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|
208 |
– |
|
237 |
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/** |
238 |
|
* remove removes an element |
239 |
|
*/ |
240 |
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public void testRemove() { |
241 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
241 |
> |
Collection full = populatedSet(3); |
242 |
|
full.remove(one); |
243 |
|
assertFalse(full.contains(one)); |
244 |
|
assertEquals(2, full.size()); |
245 |
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} |
246 |
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|
247 |
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/** |
248 |
< |
* size returns the number of elements |
248 |
> |
* size returns the number of elements |
249 |
|
*/ |
250 |
|
public void testSize() { |
251 |
< |
CopyOnWriteArraySet empty = new CopyOnWriteArraySet(); |
252 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
251 |
> |
Collection empty = new CopyOnWriteArraySet(); |
252 |
> |
Collection full = populatedSet(3); |
253 |
|
assertEquals(3, full.size()); |
254 |
|
assertEquals(0, empty.size()); |
255 |
|
} |
256 |
|
|
257 |
|
/** |
258 |
< |
* toArray returns an Object array containing all elements from the set |
258 |
> |
* toArray() returns an Object array containing all elements from |
259 |
> |
* the set in insertion order |
260 |
|
*/ |
261 |
|
public void testToArray() { |
262 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
263 |
< |
Object[] o = full.toArray(); |
264 |
< |
assertEquals(3, o.length); |
265 |
< |
assertEquals(0, o[0]); |
266 |
< |
assertEquals(1, o[1]); |
267 |
< |
assertEquals(2, o[2]); |
262 |
> |
Object[] a = new CopyOnWriteArraySet().toArray(); |
263 |
> |
assertTrue(Arrays.equals(new Object[0], a)); |
264 |
> |
assertSame(Object[].class, a.getClass()); |
265 |
> |
|
266 |
> |
Integer[] elements = new Integer[SIZE]; |
267 |
> |
for (int i = 0; i < SIZE; i++) |
268 |
> |
elements[i] = i; |
269 |
> |
Collections.shuffle(Arrays.asList(elements)); |
270 |
> |
Collection<Integer> full = populatedSet(elements); |
271 |
> |
|
272 |
> |
assertTrue(Arrays.equals(elements, full.toArray())); |
273 |
> |
assertSame(Object[].class, full.toArray().getClass()); |
274 |
|
} |
275 |
|
|
276 |
|
/** |
277 |
< |
* toArray returns an Integer array containing all elements from |
278 |
< |
* the set |
277 |
> |
* toArray(Integer array) returns an Integer array containing all |
278 |
> |
* elements from the set in insertion order |
279 |
|
*/ |
280 |
|
public void testToArray2() { |
281 |
< |
CopyOnWriteArraySet full = populatedSet(3); |
282 |
< |
Integer[] i = new Integer[3]; |
283 |
< |
i = (Integer[])full.toArray(i); |
284 |
< |
assertEquals(3, i.length); |
285 |
< |
assertEquals(0, (int) i[0]); |
251 |
< |
assertEquals(1, (int) i[1]); |
252 |
< |
assertEquals(2, (int) i[2]); |
253 |
< |
} |
281 |
> |
Collection empty = new CopyOnWriteArraySet(); |
282 |
> |
Integer[] a; |
283 |
> |
|
284 |
> |
a = new Integer[0]; |
285 |
> |
assertSame(a, empty.toArray(a)); |
286 |
|
|
287 |
+ |
a = new Integer[SIZE / 2]; |
288 |
+ |
Arrays.fill(a, 42); |
289 |
+ |
assertSame(a, empty.toArray(a)); |
290 |
+ |
assertNull(a[0]); |
291 |
+ |
for (int i = 1; i < a.length; i++) |
292 |
+ |
assertEquals(42, (int) a[i]); |
293 |
+ |
|
294 |
+ |
Integer[] elements = new Integer[SIZE]; |
295 |
+ |
for (int i = 0; i < SIZE; i++) |
296 |
+ |
elements[i] = i; |
297 |
+ |
Collections.shuffle(Arrays.asList(elements)); |
298 |
+ |
Collection<Integer> full = populatedSet(elements); |
299 |
+ |
|
300 |
+ |
Arrays.fill(a, 42); |
301 |
+ |
assertTrue(Arrays.equals(elements, full.toArray(a))); |
302 |
+ |
for (int i = 0; i < a.length; i++) |
303 |
+ |
assertEquals(42, (int) a[i]); |
304 |
+ |
assertSame(Integer[].class, full.toArray(a).getClass()); |
305 |
+ |
|
306 |
+ |
a = new Integer[SIZE]; |
307 |
+ |
Arrays.fill(a, 42); |
308 |
+ |
assertSame(a, full.toArray(a)); |
309 |
+ |
assertTrue(Arrays.equals(elements, a)); |
310 |
+ |
|
311 |
+ |
a = new Integer[2 * SIZE]; |
312 |
+ |
Arrays.fill(a, 42); |
313 |
+ |
assertSame(a, full.toArray(a)); |
314 |
+ |
assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE))); |
315 |
+ |
assertNull(a[SIZE]); |
316 |
+ |
for (int i = SIZE + 1; i < a.length; i++) |
317 |
+ |
assertEquals(42, (int) a[i]); |
318 |
+ |
} |
319 |
|
|
320 |
|
/** |
321 |
< |
* toArray throws an ArrayStoreException when the given array can |
322 |
< |
* not store the objects inside the set |
321 |
> |
* toArray throws an ArrayStoreException when the given array can |
322 |
> |
* not store the objects inside the set |
323 |
|
*/ |
324 |
|
public void testToArray_ArrayStoreException() { |
325 |
+ |
CopyOnWriteArraySet c = new CopyOnWriteArraySet(); |
326 |
+ |
c.add("zfasdfsdf"); |
327 |
+ |
c.add("asdadasd"); |
328 |
|
try { |
262 |
– |
CopyOnWriteArraySet c = new CopyOnWriteArraySet(); |
263 |
– |
c.add("zfasdfsdf"); |
264 |
– |
c.add("asdadasd"); |
329 |
|
c.toArray(new Long[5]); |
330 |
|
shouldThrow(); |
331 |
|
} catch (ArrayStoreException success) {} |
335 |
|
* A deserialized serialized set is equal |
336 |
|
*/ |
337 |
|
public void testSerialization() throws Exception { |
338 |
< |
CopyOnWriteArraySet q = populatedSet(SIZE); |
338 |
> |
Set x = populatedSet(SIZE); |
339 |
> |
Set y = serialClone(x); |
340 |
> |
|
341 |
> |
assertNotSame(y, x); |
342 |
> |
assertEquals(x.size(), y.size()); |
343 |
> |
assertEquals(x.toString(), y.toString()); |
344 |
> |
assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
345 |
> |
assertEquals(x, y); |
346 |
> |
assertEquals(y, x); |
347 |
> |
} |
348 |
|
|
349 |
< |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
350 |
< |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
351 |
< |
out.writeObject(q); |
352 |
< |
out.close(); |
353 |
< |
|
354 |
< |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
355 |
< |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
356 |
< |
CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject(); |
357 |
< |
assertEquals(q.size(), r.size()); |
285 |
< |
assertTrue(q.equals(r)); |
286 |
< |
assertTrue(r.equals(q)); |
349 |
> |
/** |
350 |
> |
* addAll is idempotent |
351 |
> |
*/ |
352 |
> |
public void testAddAll_idempotent() throws Exception { |
353 |
> |
Set x = populatedSet(SIZE); |
354 |
> |
Set y = new CopyOnWriteArraySet(x); |
355 |
> |
y.addAll(x); |
356 |
> |
assertEquals(x, y); |
357 |
> |
assertEquals(y, x); |
358 |
|
} |
359 |
|
|
360 |
|
} |