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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.Vector; |
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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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return new TestSuite(CopyOnWriteArraySetTest.class); |
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} |
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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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for (int i = 0; i < n; i++) |
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a.add(i); |
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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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|
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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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/** |
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* iterator() returns an iterator containing the elements of the set |
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* iterator() returns an iterator containing the elements of the |
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* set in insertion order |
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*/ |
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public void testIterator() { |
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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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assertEquals(j, i.next()); |
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assertEquals(3, j); |
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Collection empty = new CopyOnWriteArraySet(); |
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assertFalse(empty.iterator().hasNext()); |
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try { |
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empty.iterator().next(); |
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shouldThrow(); |
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} catch (NoSuchElementException success) {} |
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|
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Integer[] elements = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; i++) |
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elements[i] = i; |
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Collections.shuffle(Arrays.asList(elements)); |
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Collection<Integer> full = populatedSet(elements); |
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|
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Iterator it = full.iterator(); |
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for (int j = 0; j < SIZE; j++) { |
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assertTrue(it.hasNext()); |
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assertEquals(elements[j], it.next()); |
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} |
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assertIteratorExhausted(it); |
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} |
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|
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/** |
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* iterator of empty collection has no elements |
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*/ |
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public void testEmptyIterator() { |
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assertIteratorExhausted(new CopyOnWriteArraySet().iterator()); |
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} |
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|
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/** |
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* toString holds toString of elements |
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*/ |
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public void testToString() { |
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assertEquals("[]", new CopyOnWriteArraySet().toString()); |
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CopyOnWriteArraySet full = populatedSet(3); |
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String s = full.toString(); |
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for (int i = 0; i < 3; ++i) { |
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for (int i = 0; i < 3; ++i) |
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assertTrue(s.contains(String.valueOf(i))); |
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} |
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assertEquals(new ArrayList(full).toString(), |
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full.toString()); |
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} |
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|
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/** |
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} |
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|
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/** |
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* toArray returns an Object array containing all elements from the set |
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* toArray() returns an Object array containing all elements from |
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* the set in insertion order |
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*/ |
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public void testToArray() { |
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CopyOnWriteArraySet full = populatedSet(3); |
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Object[] o = full.toArray(); |
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assertEquals(3, o.length); |
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assertEquals(0, o[0]); |
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assertEquals(1, o[1]); |
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assertEquals(2, o[2]); |
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Object[] a = new CopyOnWriteArraySet().toArray(); |
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assertTrue(Arrays.equals(new Object[0], a)); |
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assertSame(Object[].class, a.getClass()); |
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|
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Integer[] elements = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; i++) |
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elements[i] = i; |
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Collections.shuffle(Arrays.asList(elements)); |
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Collection<Integer> full = populatedSet(elements); |
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|
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assertTrue(Arrays.equals(elements, full.toArray())); |
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assertSame(Object[].class, full.toArray().getClass()); |
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} |
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|
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/** |
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* toArray returns an Integer array containing all elements from |
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* the set |
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* toArray(Integer array) returns an Integer array containing all |
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* elements from the set in insertion order |
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*/ |
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public void testToArray2() { |
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CopyOnWriteArraySet full = populatedSet(3); |
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Integer[] i = new Integer[3]; |
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i = (Integer[])full.toArray(i); |
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assertEquals(3, i.length); |
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assertEquals(0, (int) i[0]); |
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assertEquals(1, (int) i[1]); |
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assertEquals(2, (int) i[2]); |
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Collection empty = new CopyOnWriteArraySet(); |
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Integer[] a; |
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|
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a = new Integer[0]; |
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assertSame(a, empty.toArray(a)); |
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|
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a = new Integer[SIZE/2]; |
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Arrays.fill(a, 42); |
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assertSame(a, empty.toArray(a)); |
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assertNull(a[0]); |
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for (int i = 1; i < a.length; i++) |
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assertEquals(42, (int) a[i]); |
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|
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Integer[] elements = new Integer[SIZE]; |
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for (int i = 0; i < SIZE; i++) |
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elements[i] = i; |
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Collections.shuffle(Arrays.asList(elements)); |
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Collection<Integer> full = populatedSet(elements); |
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|
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Arrays.fill(a, 42); |
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assertTrue(Arrays.equals(elements, full.toArray(a))); |
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for (int i = 0; i < a.length; i++) |
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assertEquals(42, (int) a[i]); |
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assertSame(Integer[].class, full.toArray(a).getClass()); |
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|
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a = new Integer[SIZE]; |
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Arrays.fill(a, 42); |
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assertSame(a, full.toArray(a)); |
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assertTrue(Arrays.equals(elements, a)); |
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|
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a = new Integer[2*SIZE]; |
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Arrays.fill(a, 42); |
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assertSame(a, full.toArray(a)); |
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assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE))); |
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assertNull(a[SIZE]); |
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for (int i = SIZE + 1; i < a.length; i++) |
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assertEquals(42, (int) a[i]); |
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} |
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|
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/** |
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* A deserialized serialized set is equal |
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*/ |
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public void testSerialization() throws Exception { |
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CopyOnWriteArraySet q = populatedSet(SIZE); |
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Set x = populatedSet(SIZE); |
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Set y = serialClone(x); |
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|
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ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
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ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
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out.writeObject(q); |
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out.close(); |
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|
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ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
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ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
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CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject(); |
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assertEquals(q.size(), r.size()); |
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assertTrue(q.equals(r)); |
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assertTrue(r.equals(q)); |
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assertNotSame(y, x); |
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assertEquals(x.size(), y.size()); |
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assertEquals(x.toString(), y.toString()); |
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assertTrue(Arrays.equals(x.toArray(), y.toArray())); |
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assertEquals(x, y); |
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assertEquals(y, x); |
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} |
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|
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/** |
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* addAll is idempotent |
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*/ |
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public void testAddAll_idempotent() throws Exception { |
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Set x = populatedSet(SIZE); |
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Set y = new CopyOnWriteArraySet(x); |
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y.addAll(x); |
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assertEquals(x, y); |
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assertEquals(y, x); |
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} |
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|
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} |
