test/tck/CopyOnWriteArraySetTest.java

/*
 * Written by Doug Lea with assistance from members of JCP JSR-166
 * Expert Group and released to the public domain, as explained at
 * http://creativecommons.org/publicdomain/zero/1.0/
 * Other contributors include Andrew Wright, Jeffrey Hayes,
 * Pat Fisher, Mike Judd.
 */

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.concurrent.CopyOnWriteArraySet;

import junit.framework.Test;
import junit.framework.TestSuite;

public class CopyOnWriteArraySetTest extends JSR166TestCase {
    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }
    public static Test suite() {
        return new TestSuite(CopyOnWriteArraySetTest.class);
    }

    static CopyOnWriteArraySet<Integer> populatedSet(int n) {
        CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
        assertTrue(a.isEmpty());
        for (int i = 0; i < n; i++)
            a.add(i);
        assertFalse(a.isEmpty());
        assertEquals(n, a.size());
        return a;
    }

    static CopyOnWriteArraySet populatedSet(Integer[] elements) {
        CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
        assertTrue(a.isEmpty());
        for (int i = 0; i < elements.length; i++)
            a.add(elements[i]);
        assertFalse(a.isEmpty());
        assertEquals(elements.length, a.size());
        return a;
    }

    /**
     * Default-constructed set is empty
     */
    public void testConstructor() {
        CopyOnWriteArraySet a = new CopyOnWriteArraySet();
        assertTrue(a.isEmpty());
    }

    /**
     * Collection-constructed set holds all of its elements
     */
    public void testConstructor3() {
        Integer[] ints = new Integer[SIZE];
        for (int i = 0; i < SIZE-1; ++i)
            ints[i] = new Integer(i);
        CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
        for (int i = 0; i < SIZE; ++i)
            assertTrue(a.contains(ints[i]));
    }

    /**
     * addAll adds each element from the given collection
     */
    public void testAddAll() {
        CopyOnWriteArraySet full = populatedSet(3);
        assertTrue(full.addAll(Arrays.asList(three, four, five)));
        assertEquals(6, full.size());
        assertFalse(full.addAll(Arrays.asList(three, four, five)));
        assertEquals(6, full.size());
    }

    /**
     * addAll adds each element from the given collection that did not
     * already exist in the set
     */
    public void testAddAll2() {
        CopyOnWriteArraySet full = populatedSet(3);
        // "one" is duplicate and will not be added
        assertTrue(full.addAll(Arrays.asList(three, four, one)));
        assertEquals(5, full.size());
        assertFalse(full.addAll(Arrays.asList(three, four, one)));
        assertEquals(5, full.size());
    }

    /**
     * add will not add the element if it already exists in the set
     */
    public void testAdd2() {
        CopyOnWriteArraySet full = populatedSet(3);
        full.add(one);
        assertEquals(3, full.size());
    }

    /**
     * add adds the element when it does not exist in the set
     */
    public void testAdd3() {
        CopyOnWriteArraySet full = populatedSet(3);
        full.add(three);
        assertTrue(full.contains(three));
    }

    /**
     * clear removes all elements from the set
     */
    public void testClear() {
        CopyOnWriteArraySet full = populatedSet(3);
        full.clear();
        assertEquals(0, full.size());
    }

    /**
     * contains returns true for added elements
     */
    public void testContains() {
        CopyOnWriteArraySet full = populatedSet(3);
        assertTrue(full.contains(one));
        assertFalse(full.contains(five));
    }

    /**
     * Sets with equal elements are equal
     */
    public void testEquals() {
        CopyOnWriteArraySet a = populatedSet(3);
        CopyOnWriteArraySet b = populatedSet(3);
        assertTrue(a.equals(b));
        assertTrue(b.equals(a));
        assertEquals(a.hashCode(), b.hashCode());
        a.add(m1);
        assertFalse(a.equals(b));
        assertFalse(b.equals(a));
        b.add(m1);
        assertTrue(a.equals(b));
        assertTrue(b.equals(a));
        assertEquals(a.hashCode(), b.hashCode());
    }

    /**
     * containsAll returns true for collections with subset of elements
     */
    public void testContainsAll() {
        CopyOnWriteArraySet full = populatedSet(3);
        assertTrue(full.containsAll(Arrays.asList()));
        assertTrue(full.containsAll(Arrays.asList(one)));
        assertTrue(full.containsAll(Arrays.asList(one, two)));
        assertFalse(full.containsAll(Arrays.asList(one, two, six)));
        assertFalse(full.containsAll(Arrays.asList(six)));
    }

    /**
     * isEmpty is true when empty, else false
     */
    public void testIsEmpty() {
        CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
        CopyOnWriteArraySet full = populatedSet(3);
        assertTrue(empty.isEmpty());
        assertFalse(full.isEmpty());
    }

    /**
     * iterator() returns an iterator containing the elements of the
     * set in insertion order
     */
    public void testIterator() {
        Collection empty = new CopyOnWriteArraySet();
        assertFalse(empty.iterator().hasNext());
        try {
            empty.iterator().next();
            shouldThrow();
        } catch (NoSuchElementException success) {}

        Integer[] elements = new Integer[SIZE];
        for (int i = 0; i < SIZE; i++)
            elements[i] = i;
        Collections.shuffle(Arrays.asList(elements));
        Collection<Integer> full = populatedSet(elements);

        Iterator it = full.iterator();
        for (int j = 0; j < SIZE; j++) {
            assertTrue(it.hasNext());
            assertEquals(elements[j], it.next());
        }
        assertIteratorExhausted(it);
    }

    /**
     * iterator of empty collection has no elements
     */
    public void testEmptyIterator() {
        assertIteratorExhausted(new CopyOnWriteArraySet().iterator());
    }

    /**
     * iterator remove is unsupported
     */
    public void testIteratorRemove() {
        CopyOnWriteArraySet full = populatedSet(3);
        Iterator it = full.iterator();
        it.next();
        try {
            it.remove();
            shouldThrow();
        } catch (UnsupportedOperationException success) {}
    }

    /**
     * toString holds toString of elements
     */
    public void testToString() {
        assertEquals("[]", new CopyOnWriteArraySet().toString());
        CopyOnWriteArraySet full = populatedSet(3);
        String s = full.toString();
        for (int i = 0; i < 3; ++i)
            assertTrue(s.contains(String.valueOf(i)));
        assertEquals(new ArrayList(full).toString(),
                     full.toString());
    }

    /**
     * removeAll removes all elements from the given collection
     */
    public void testRemoveAll() {
        CopyOnWriteArraySet full = populatedSet(3);
        assertTrue(full.removeAll(Arrays.asList(one, two)));
        assertEquals(1, full.size());
        assertFalse(full.removeAll(Arrays.asList(one, two)));
        assertEquals(1, full.size());
    }

    /**
     * remove removes an element
     */
    public void testRemove() {
        CopyOnWriteArraySet full = populatedSet(3);
        full.remove(one);
        assertFalse(full.contains(one));
        assertEquals(2, full.size());
    }

    /**
     * size returns the number of elements
     */
    public void testSize() {
        CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
        CopyOnWriteArraySet full = populatedSet(3);
        assertEquals(3, full.size());
        assertEquals(0, empty.size());
    }

    /**
     * toArray() returns an Object array containing all elements from
     * the set in insertion order
     */
    public void testToArray() {
        Object[] a = new CopyOnWriteArraySet().toArray();
        assertTrue(Arrays.equals(new Object[0], a));
        assertSame(Object[].class, a.getClass());

        Integer[] elements = new Integer[SIZE];
        for (int i = 0; i < SIZE; i++)
            elements[i] = i;
        Collections.shuffle(Arrays.asList(elements));
        Collection<Integer> full = populatedSet(elements);

        assertTrue(Arrays.equals(elements, full.toArray()));
        assertSame(Object[].class, full.toArray().getClass());
    }

    /**
     * toArray(Integer array) returns an Integer array containing all
     * elements from the set in insertion order
     */
    public void testToArray2() {
        Collection empty = new CopyOnWriteArraySet();
        Integer[] a;

        a = new Integer[0];
        assertSame(a, empty.toArray(a));

        a = new Integer[SIZE/2];
        Arrays.fill(a, 42);
        assertSame(a, empty.toArray(a));
        assertNull(a[0]);
        for (int i = 1; i < a.length; i++)
            assertEquals(42, (int) a[i]);

        Integer[] elements = new Integer[SIZE];
        for (int i = 0; i < SIZE; i++)
            elements[i] = i;
        Collections.shuffle(Arrays.asList(elements));
        Collection<Integer> full = populatedSet(elements);

        Arrays.fill(a, 42);
        assertTrue(Arrays.equals(elements, full.toArray(a)));
        for (int i = 0; i < a.length; i++)
            assertEquals(42, (int) a[i]);
        assertSame(Integer[].class, full.toArray(a).getClass());

        a = new Integer[SIZE];
        Arrays.fill(a, 42);
        assertSame(a, full.toArray(a));
        assertTrue(Arrays.equals(elements, a));

        a = new Integer[2*SIZE];
        Arrays.fill(a, 42);
        assertSame(a, full.toArray(a));
        assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
        assertNull(a[SIZE]);
        for (int i = SIZE + 1; i < a.length; i++)
            assertEquals(42, (int) a[i]);
    }

    /**
     * toArray throws an ArrayStoreException when the given array can
     * not store the objects inside the set
     */
    public void testToArray_ArrayStoreException() {
        try {
            CopyOnWriteArraySet c = new CopyOnWriteArraySet();
            c.add("zfasdfsdf");
            c.add("asdadasd");
            c.toArray(new Long[5]);
            shouldThrow();
        } catch (ArrayStoreException success) {}
    }

    /**
     * A deserialized serialized set is equal
     */
    public void testSerialization() throws Exception {
        Set x = populatedSet(SIZE);
        Set y = serialClone(x);

        assertNotSame(y, x);
        assertEquals(x.size(), y.size());
        assertEquals(x.toString(), y.toString());
        assertTrue(Arrays.equals(x.toArray(), y.toArray()));
        assertEquals(x, y);
        assertEquals(y, x);
    }

    /**
     * addAll is idempotent
     */
    public void testAddAll_idempotent() throws Exception {
        Set x = populatedSet(SIZE);
        Set y = new CopyOnWriteArraySet(x);
        y.addAll(x);
        assertEquals(x, y);
        assertEquals(y, x);
    }

}
Revision:	1.30
Committed:	Fri Feb 27 19:28:23 2015 UTC (9 years, 2 months ago) by jsr166
Branch:	MAIN
Changes since 1.29:	+15 -21 lines
Log Message:	replace Vector with Arrays.asList; add more assertions
#	User	Rev	Content
1	dl	1.1	/*
2	dl	1.6	* Written by Doug Lea with assistance from members of JCP JSR-166
3			* Expert Group and released to the public domain, as explained at
4	jsr166	1.17	* http://creativecommons.org/publicdomain/zero/1.0/
5	jsr166	1.8	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9	jsr166	1.25	import java.util.ArrayList;
10	jsr166	1.19	import java.util.Arrays;
11	jsr166	1.22	import java.util.Collection;
12	jsr166	1.21	import java.util.Collections;
13	jsr166	1.19	import java.util.Iterator;
14	jsr166	1.24	import java.util.NoSuchElementException;
15	jsr166	1.19	import java.util.Set;
16			import java.util.concurrent.CopyOnWriteArraySet;
17	dl	1.1
18	jsr166	1.28	import junit.framework.Test;
19			import junit.framework.TestSuite;
20
21	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
22	dl	1.1	public static void main(String[] args) {
23	jsr166	1.15	junit.textui.TestRunner.run(suite());
24	dl	1.1	}
25			public static Test suite() {
26	jsr166	1.11	return new TestSuite(CopyOnWriteArraySetTest.class);
27	dl	1.1	}
28
29	jsr166	1.21	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
30			CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
31	dl	1.1	assertTrue(a.isEmpty());
32	jsr166	1.22	for (int i = 0; i < n; i++)
33	jsr166	1.21	a.add(i);
34	dl	1.1	assertFalse(a.isEmpty());
35			assertEquals(n, a.size());
36			return a;
37			}
38
39	jsr166	1.21	static CopyOnWriteArraySet populatedSet(Integer[] elements) {
40			CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
41			assertTrue(a.isEmpty());
42			for (int i = 0; i < elements.length; i++)
43			a.add(elements[i]);
44			assertFalse(a.isEmpty());
45			assertEquals(elements.length, a.size());
46			return a;
47			}
48
49	dl	1.4	/**
50			* Default-constructed set is empty
51			*/
52	dl	1.3	public void testConstructor() {
53	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
54	dl	1.3	assertTrue(a.isEmpty());
55			}
56
57	dl	1.4	/**
58	dl	1.5	* Collection-constructed set holds all of its elements
59	dl	1.4	*/
60	dl	1.3	public void testConstructor3() {
61			Integer[] ints = new Integer[SIZE];
62			for (int i = 0; i < SIZE-1; ++i)
63			ints[i] = new Integer(i);
64	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
65	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
66	dl	1.3	assertTrue(a.contains(ints[i]));
67			}
68	jsr166	1.8
69	dl	1.1	/**
70	jsr166	1.16	* addAll adds each element from the given collection
71	dl	1.1	*/
72	dl	1.4	public void testAddAll() {
73	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
74	jsr166	1.30	assertTrue(full.addAll(Arrays.asList(three, four, five)));
75			assertEquals(6, full.size());
76			assertFalse(full.addAll(Arrays.asList(three, four, five)));
77	jsr166	1.11	assertEquals(6, full.size());
78	dl	1.1	}
79
80			/**
81	jsr166	1.16	* addAll adds each element from the given collection that did not
82			* already exist in the set
83	dl	1.1	*/
84	dl	1.4	public void testAddAll2() {
85	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
86	jsr166	1.30	// "one" is duplicate and will not be added
87			assertTrue(full.addAll(Arrays.asList(three, four, one)));
88			assertEquals(5, full.size());
89			assertFalse(full.addAll(Arrays.asList(three, four, one)));
90	jsr166	1.11	assertEquals(5, full.size());
91	dl	1.1	}
92
93			/**
94	jsr166	1.16	* add will not add the element if it already exists in the set
95	dl	1.1	*/
96	dl	1.4	public void testAdd2() {
97	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
98			full.add(one);
99			assertEquals(3, full.size());
100	dl	1.1	}
101
102			/**
103	jsr166	1.16	* add adds the element when it does not exist in the set
104	dl	1.1	*/
105	dl	1.4	public void testAdd3() {
106	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
107	dl	1.3	full.add(three);
108			assertTrue(full.contains(three));
109	dl	1.1	}
110
111			/**
112	jsr166	1.16	* clear removes all elements from the set
113	dl	1.1	*/
114	dl	1.4	public void testClear() {
115	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
116			full.clear();
117			assertEquals(0, full.size());
118	dl	1.1	}
119
120			/**
121	jsr166	1.16	* contains returns true for added elements
122	dl	1.1	*/
123	dl	1.4	public void testContains() {
124	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
125			assertTrue(full.contains(one));
126			assertFalse(full.contains(five));
127	dl	1.1	}
128
129	dl	1.4	/**
130			* Sets with equal elements are equal
131			*/
132	dl	1.1	public void testEquals() {
133	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
134			CopyOnWriteArraySet b = populatedSet(3);
135	dl	1.1	assertTrue(a.equals(b));
136			assertTrue(b.equals(a));
137			assertEquals(a.hashCode(), b.hashCode());
138	dl	1.3	a.add(m1);
139	dl	1.1	assertFalse(a.equals(b));
140			assertFalse(b.equals(a));
141	dl	1.3	b.add(m1);
142	dl	1.1	assertTrue(a.equals(b));
143			assertTrue(b.equals(a));
144			assertEquals(a.hashCode(), b.hashCode());
145			}
146
147			/**
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	jsr166	1.30	assertTrue(full.containsAll(Arrays.asList()));
153			assertTrue(full.containsAll(Arrays.asList(one)));
154			assertTrue(full.containsAll(Arrays.asList(one, two)));
155			assertFalse(full.containsAll(Arrays.asList(one, two, six)));
156			assertFalse(full.containsAll(Arrays.asList(six)));
157	dl	1.1	}
158
159			/**
160	jsr166	1.16	* isEmpty is true when empty, else false
161	dl	1.1	*/
162	dl	1.4	public void testIsEmpty() {
163	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
164			CopyOnWriteArraySet full = populatedSet(3);
165			assertTrue(empty.isEmpty());
166			assertFalse(full.isEmpty());
167	dl	1.1	}
168
169			/**
170	jsr166	1.24	* iterator() returns an iterator containing the elements of the
171			* set in insertion order
172	dl	1.1	*/
173	dl	1.4	public void testIterator() {
174	jsr166	1.25	Collection empty = new CopyOnWriteArraySet();
175	jsr166	1.24	assertFalse(empty.iterator().hasNext());
176			try {
177			empty.iterator().next();
178			shouldThrow();
179			} catch (NoSuchElementException success) {}
180
181			Integer[] elements = new Integer[SIZE];
182			for (int i = 0; i < SIZE; i++)
183			elements[i] = i;
184			Collections.shuffle(Arrays.asList(elements));
185			Collection<Integer> full = populatedSet(elements);
186
187			Iterator it = full.iterator();
188			for (int j = 0; j < SIZE; j++) {
189			assertTrue(it.hasNext());
190			assertEquals(elements[j], it.next());
191			}
192	jsr166	1.29	assertIteratorExhausted(it);
193			}
194
195			/**
196			* iterator of empty collection has no elements
197			*/
198			public void testEmptyIterator() {
199			assertIteratorExhausted(new CopyOnWriteArraySet().iterator());
200	dl	1.1	}
201
202	dl	1.4	/**
203			* iterator remove is unsupported
204			*/
205	jsr166	1.15	public void testIteratorRemove() {
206	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
207	dl	1.1	Iterator it = full.iterator();
208			it.next();
209			try {
210			it.remove();
211	dl	1.4	shouldThrow();
212	jsr166	1.12	} catch (UnsupportedOperationException success) {}
213	dl	1.1	}
214
215	dl	1.4	/**
216			* toString holds toString of elements
217			*/
218			public void testToString() {
219	jsr166	1.25	assertEquals("[]", new CopyOnWriteArraySet().toString());
220	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
221	dl	1.1	String s = full.toString();
222	jsr166	1.25	for (int i = 0; i < 3; ++i)
223	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
224	jsr166	1.25	assertEquals(new ArrayList(full).toString(),
225			full.toString());
226	jsr166	1.8	}
227	dl	1.1
228			/**
229	jsr166	1.16	* removeAll removes all elements from the given collection
230	dl	1.1	*/
231	dl	1.4	public void testRemoveAll() {
232	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
233	jsr166	1.30	assertTrue(full.removeAll(Arrays.asList(one, two)));
234			assertEquals(1, full.size());
235			assertFalse(full.removeAll(Arrays.asList(one, two)));
236	jsr166	1.11	assertEquals(1, full.size());
237	dl	1.1	}
238
239	dl	1.4	/**
240			* remove removes an element
241			*/
242			public void testRemove() {
243	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
244			full.remove(one);
245	dl	1.3	assertFalse(full.contains(one));
246	jsr166	1.11	assertEquals(2, full.size());
247	dl	1.1	}
248
249			/**
250	jsr166	1.16	* size returns the number of elements
251	dl	1.1	*/
252	dl	1.4	public void testSize() {
253	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
254			CopyOnWriteArraySet full = populatedSet(3);
255			assertEquals(3, full.size());
256			assertEquals(0, empty.size());
257	dl	1.1	}
258
259			/**
260	jsr166	1.21	* toArray() returns an Object array containing all elements from
261			* the set in insertion order
262	dl	1.1	*/
263	dl	1.4	public void testToArray() {
264	jsr166	1.21	Object[] a = new CopyOnWriteArraySet().toArray();
265			assertTrue(Arrays.equals(new Object[0], a));
266			assertSame(Object[].class, a.getClass());
267
268			Integer[] elements = new Integer[SIZE];
269	jsr166	1.20	for (int i = 0; i < SIZE; i++)
270	jsr166	1.21	elements[i] = i;
271			Collections.shuffle(Arrays.asList(elements));
272	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
273	jsr166	1.21
274			assertTrue(Arrays.equals(elements, full.toArray()));
275			assertSame(Object[].class, full.toArray().getClass());
276	dl	1.1	}
277
278			/**
279	jsr166	1.21	* toArray(Integer array) returns an Integer array containing all
280			* elements from the set in insertion order
281	dl	1.1	*/
282	dl	1.4	public void testToArray2() {
283	jsr166	1.22	Collection empty = new CopyOnWriteArraySet();
284	jsr166	1.21	Integer[] a;
285
286			a = new Integer[0];
287			assertSame(a, empty.toArray(a));
288
289			a = new Integer[SIZE/2];
290			Arrays.fill(a, 42);
291			assertSame(a, empty.toArray(a));
292			assertNull(a[0]);
293			for (int i = 1; i < a.length; i++)
294			assertEquals(42, (int) a[i]);
295
296			Integer[] elements = new Integer[SIZE];
297	jsr166	1.20	for (int i = 0; i < SIZE; i++)
298	jsr166	1.21	elements[i] = i;
299			Collections.shuffle(Arrays.asList(elements));
300	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
301	jsr166	1.21
302			Arrays.fill(a, 42);
303			assertTrue(Arrays.equals(elements, full.toArray(a)));
304			for (int i = 0; i < a.length; i++)
305			assertEquals(42, (int) a[i]);
306			assertSame(Integer[].class, full.toArray(a).getClass());
307
308			a = new Integer[SIZE];
309			Arrays.fill(a, 42);
310			assertSame(a, full.toArray(a));
311			assertTrue(Arrays.equals(elements, a));
312
313			a = new Integer[2*SIZE];
314			Arrays.fill(a, 42);
315			assertSame(a, full.toArray(a));
316			assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
317			assertNull(a[SIZE]);
318			for (int i = SIZE + 1; i < a.length; i++)
319			assertEquals(42, (int) a[i]);
320	dl	1.1	}
321
322			/**
323	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
324			* not store the objects inside the set
325	dl	1.1	*/
326	dl	1.4	public void testToArray_ArrayStoreException() {
327			try {
328	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
329			c.add("zfasdfsdf");
330			c.add("asdadasd");
331			c.toArray(new Long[5]);
332	jsr166	1.11	shouldThrow();
333	jsr166	1.13	} catch (ArrayStoreException success) {}
334	dl	1.2	}
335
336	dl	1.4	/**
337	dl	1.7	* A deserialized serialized set is equal
338	dl	1.4	*/
339	jsr166	1.12	public void testSerialization() throws Exception {
340	jsr166	1.19	Set x = populatedSet(SIZE);
341			Set y = serialClone(x);
342	dl	1.2
343	jsr166	1.27	assertNotSame(y, x);
344	jsr166	1.19	assertEquals(x.size(), y.size());
345	jsr166	1.23	assertEquals(x.toString(), y.toString());
346			assertTrue(Arrays.equals(x.toArray(), y.toArray()));
347	jsr166	1.19	assertEquals(x, y);
348			assertEquals(y, x);
349	dl	1.1	}
350
351	jsr166	1.26	/**
352			* addAll is idempotent
353			*/
354			public void testAddAll_idempotent() throws Exception {
355			Set x = populatedSet(SIZE);
356			Set y = new CopyOnWriteArraySet(x);
357			y.addAll(x);
358			assertEquals(x, y);
359			assertEquals(y, x);
360			}
361
362	dl	1.1	}