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.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) {
        main(suite(), args);
    }
    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);
        assertEquals(n == 0, 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 non-duplicate element from the given collection
     */
    public void testAddAll() {
        Set 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 non-duplicate element from the given collection
     */
    public void testAddAll2() {
        Set 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() {
        Set 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() {
        Set full = populatedSet(3);
        full.add(three);
        assertTrue(full.contains(three));
    }

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

    /**
     * contains returns true for added elements
     */
    public void testContains() {
        Collection 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));
        assertTrue(a.containsAll(b));
        assertTrue(b.containsAll(a));
        assertEquals(a.hashCode(), b.hashCode());
        assertEquals(a.size(), b.size());

        a.add(m1);
        assertFalse(a.equals(b));
        assertFalse(b.equals(a));
        assertTrue(a.containsAll(b));
        assertFalse(b.containsAll(a));
        b.add(m1);
        assertTrue(a.equals(b));
        assertTrue(b.equals(a));
        assertTrue(a.containsAll(b));
        assertTrue(b.containsAll(a));
        assertEquals(a.hashCode(), b.hashCode());

        Object x = a.iterator().next();
        a.remove(x);
        assertFalse(a.equals(b));
        assertFalse(b.equals(a));
        assertFalse(a.containsAll(b));
        assertTrue(b.containsAll(a));
        a.add(x);
        assertTrue(a.equals(b));
        assertTrue(b.equals(a));
        assertTrue(a.containsAll(b));
        assertTrue(b.containsAll(a));
        assertEquals(a.hashCode(), b.hashCode());
        assertEquals(a.size(), b.size());

        CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
        CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
        assertTrue(empty1.equals(empty1));
        assertTrue(empty1.equals(empty2));

        assertFalse(empty1.equals(a));
        assertFalse(a.equals(empty1));

        assertFalse(a.equals(null));
    }

    /**
     * containsAll returns true for collections with subset of elements
     */
    public void testContainsAll() {
        Collection full = populatedSet(3);
        assertTrue(full.containsAll(full));
        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)));

        CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
        CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
        assertTrue(empty1.containsAll(empty2));
        assertTrue(empty1.containsAll(empty1));
        assertFalse(empty1.containsAll(full));
        assertTrue(full.containsAll(empty1));

        try {
            full.containsAll(null);
            shouldThrow();
        } catch (NullPointerException success) {}
    }

    /**
     * isEmpty is true when empty, else false
     */
    public void testIsEmpty() {
        assertTrue(populatedSet(0).isEmpty());
        assertFalse(populatedSet(3).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;
        shuffle(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() {
        Collection 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());
        Collection 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() {
        Set 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() {
        Collection full = populatedSet(3);
        full.remove(one);
        assertFalse(full.contains(one));
        assertEquals(2, full.size());
    }

    /**
     * size returns the number of elements
     */
    public void testSize() {
        Collection empty = new CopyOnWriteArraySet();
        Collection 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;
        shuffle(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;
        shuffle(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() {
        CopyOnWriteArraySet c = new CopyOnWriteArraySet();
        c.add("zfasdfsdf");
        c.add("asdadasd");
        try {
            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:	1.37
Committed:	Wed Aug 24 22:22:39 2016 UTC (7 years, 8 months ago) by jsr166
Branch:	MAIN
Changes since 1.36:	+0 -1 lines
Log Message:	fix imports
#	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	1.19	import java.util.Iterator;
13	jsr166	1.24	import java.util.NoSuchElementException;
14	jsr166	1.19	import java.util.Set;
15			import java.util.concurrent.CopyOnWriteArraySet;
16	dl	1.1
17	jsr166	1.28	import junit.framework.Test;
18			import junit.framework.TestSuite;
19
20	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
21	dl	1.1	public static void main(String[] args) {
22	jsr166	1.32	main(suite(), args);
23	dl	1.1	}
24			public static Test suite() {
25	jsr166	1.11	return new TestSuite(CopyOnWriteArraySetTest.class);
26	dl	1.1	}
27
28	jsr166	1.21	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
29			CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
30	dl	1.1	assertTrue(a.isEmpty());
31	jsr166	1.22	for (int i = 0; i < n; i++)
32	jsr166	1.21	a.add(i);
33	jsr166	1.31	assertEquals(n == 0, a.isEmpty());
34	dl	1.1	assertEquals(n, a.size());
35			return a;
36			}
37
38	jsr166	1.21	static CopyOnWriteArraySet populatedSet(Integer[] elements) {
39			CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
40			assertTrue(a.isEmpty());
41			for (int i = 0; i < elements.length; i++)
42			a.add(elements[i]);
43			assertFalse(a.isEmpty());
44			assertEquals(elements.length, a.size());
45			return a;
46			}
47
48	dl	1.4	/**
49			* Default-constructed set is empty
50			*/
51	dl	1.3	public void testConstructor() {
52	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
53	dl	1.3	assertTrue(a.isEmpty());
54			}
55
56	dl	1.4	/**
57	dl	1.5	* Collection-constructed set holds all of its elements
58	dl	1.4	*/
59	dl	1.3	public void testConstructor3() {
60			Integer[] ints = new Integer[SIZE];
61	jsr166	1.34	for (int i = 0; i < SIZE - 1; ++i)
62	dl	1.3	ints[i] = new Integer(i);
63	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
64	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
65	dl	1.3	assertTrue(a.contains(ints[i]));
66			}
67	jsr166	1.8
68	dl	1.1	/**
69	jsr166	1.31	* addAll adds each non-duplicate element from the given collection
70	dl	1.1	*/
71	dl	1.4	public void testAddAll() {
72	jsr166	1.31	Set full = populatedSet(3);
73	jsr166	1.30	assertTrue(full.addAll(Arrays.asList(three, four, five)));
74			assertEquals(6, full.size());
75			assertFalse(full.addAll(Arrays.asList(three, four, five)));
76	jsr166	1.11	assertEquals(6, full.size());
77	dl	1.1	}
78
79			/**
80	jsr166	1.31	* addAll adds each non-duplicate element from the given collection
81	dl	1.1	*/
82	dl	1.4	public void testAddAll2() {
83	jsr166	1.31	Set full = populatedSet(3);
84	jsr166	1.30	// "one" is duplicate and will not be added
85			assertTrue(full.addAll(Arrays.asList(three, four, one)));
86			assertEquals(5, full.size());
87			assertFalse(full.addAll(Arrays.asList(three, four, one)));
88	jsr166	1.11	assertEquals(5, full.size());
89	dl	1.1	}
90
91			/**
92	jsr166	1.16	* add will not add the element if it already exists in the set
93	dl	1.1	*/
94	dl	1.4	public void testAdd2() {
95	jsr166	1.31	Set full = populatedSet(3);
96	jsr166	1.11	full.add(one);
97			assertEquals(3, full.size());
98	dl	1.1	}
99
100			/**
101	jsr166	1.16	* add adds the element when it does not exist in the set
102	dl	1.1	*/
103	dl	1.4	public void testAdd3() {
104	jsr166	1.31	Set full = populatedSet(3);
105	dl	1.3	full.add(three);
106			assertTrue(full.contains(three));
107	dl	1.1	}
108
109			/**
110	jsr166	1.16	* clear removes all elements from the set
111	dl	1.1	*/
112	dl	1.4	public void testClear() {
113	jsr166	1.31	Collection full = populatedSet(3);
114	jsr166	1.11	full.clear();
115			assertEquals(0, full.size());
116	jsr166	1.31	assertTrue(full.isEmpty());
117	dl	1.1	}
118
119			/**
120	jsr166	1.16	* contains returns true for added elements
121	dl	1.1	*/
122	dl	1.4	public void testContains() {
123	jsr166	1.31	Collection full = populatedSet(3);
124	jsr166	1.11	assertTrue(full.contains(one));
125			assertFalse(full.contains(five));
126	dl	1.1	}
127
128	dl	1.4	/**
129			* Sets with equal elements are equal
130			*/
131	dl	1.1	public void testEquals() {
132	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
133			CopyOnWriteArraySet b = populatedSet(3);
134	dl	1.1	assertTrue(a.equals(b));
135			assertTrue(b.equals(a));
136	jsr166	1.35	assertTrue(a.containsAll(b));
137			assertTrue(b.containsAll(a));
138	dl	1.1	assertEquals(a.hashCode(), b.hashCode());
139	jsr166	1.35	assertEquals(a.size(), b.size());
140
141	dl	1.3	a.add(m1);
142	dl	1.1	assertFalse(a.equals(b));
143			assertFalse(b.equals(a));
144	jsr166	1.35	assertTrue(a.containsAll(b));
145			assertFalse(b.containsAll(a));
146	dl	1.3	b.add(m1);
147	dl	1.1	assertTrue(a.equals(b));
148			assertTrue(b.equals(a));
149	jsr166	1.35	assertTrue(a.containsAll(b));
150			assertTrue(b.containsAll(a));
151			assertEquals(a.hashCode(), b.hashCode());
152
153			Object x = a.iterator().next();
154			a.remove(x);
155			assertFalse(a.equals(b));
156			assertFalse(b.equals(a));
157			assertFalse(a.containsAll(b));
158			assertTrue(b.containsAll(a));
159			a.add(x);
160			assertTrue(a.equals(b));
161			assertTrue(b.equals(a));
162			assertTrue(a.containsAll(b));
163			assertTrue(b.containsAll(a));
164	dl	1.1	assertEquals(a.hashCode(), b.hashCode());
165	jsr166	1.35	assertEquals(a.size(), b.size());
166
167			CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
168			CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
169			assertTrue(empty1.equals(empty1));
170			assertTrue(empty1.equals(empty2));
171
172			assertFalse(empty1.equals(a));
173			assertFalse(a.equals(empty1));
174
175			assertFalse(a.equals(null));
176	dl	1.1	}
177
178			/**
179	jsr166	1.16	* containsAll returns true for collections with subset of elements
180	dl	1.1	*/
181	dl	1.4	public void testContainsAll() {
182	jsr166	1.31	Collection full = populatedSet(3);
183	jsr166	1.35	assertTrue(full.containsAll(full));
184	jsr166	1.30	assertTrue(full.containsAll(Arrays.asList()));
185			assertTrue(full.containsAll(Arrays.asList(one)));
186			assertTrue(full.containsAll(Arrays.asList(one, two)));
187			assertFalse(full.containsAll(Arrays.asList(one, two, six)));
188			assertFalse(full.containsAll(Arrays.asList(six)));
189	jsr166	1.35
190			CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
191			CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
192			assertTrue(empty1.containsAll(empty2));
193			assertTrue(empty1.containsAll(empty1));
194			assertFalse(empty1.containsAll(full));
195			assertTrue(full.containsAll(empty1));
196
197			try {
198			full.containsAll(null);
199			shouldThrow();
200			} catch (NullPointerException success) {}
201	dl	1.1	}
202
203			/**
204	jsr166	1.16	* isEmpty is true when empty, else false
205	dl	1.1	*/
206	dl	1.4	public void testIsEmpty() {
207	jsr166	1.31	assertTrue(populatedSet(0).isEmpty());
208			assertFalse(populatedSet(3).isEmpty());
209	dl	1.1	}
210
211			/**
212	jsr166	1.24	* iterator() returns an iterator containing the elements of the
213			* set in insertion order
214	dl	1.1	*/
215	dl	1.4	public void testIterator() {
216	jsr166	1.25	Collection empty = new CopyOnWriteArraySet();
217	jsr166	1.24	assertFalse(empty.iterator().hasNext());
218			try {
219			empty.iterator().next();
220			shouldThrow();
221			} catch (NoSuchElementException success) {}
222
223			Integer[] elements = new Integer[SIZE];
224			for (int i = 0; i < SIZE; i++)
225			elements[i] = i;
226	jsr166	1.36	shuffle(elements);
227	jsr166	1.24	Collection<Integer> full = populatedSet(elements);
228
229			Iterator it = full.iterator();
230			for (int j = 0; j < SIZE; j++) {
231			assertTrue(it.hasNext());
232			assertEquals(elements[j], it.next());
233			}
234	jsr166	1.29	assertIteratorExhausted(it);
235			}
236
237			/**
238			* iterator of empty collection has no elements
239			*/
240			public void testEmptyIterator() {
241			assertIteratorExhausted(new CopyOnWriteArraySet().iterator());
242	dl	1.1	}
243
244	dl	1.4	/**
245			* iterator remove is unsupported
246			*/
247	jsr166	1.15	public void testIteratorRemove() {
248	jsr166	1.31	Collection full = populatedSet(3);
249	dl	1.1	Iterator it = full.iterator();
250			it.next();
251			try {
252			it.remove();
253	dl	1.4	shouldThrow();
254	jsr166	1.12	} catch (UnsupportedOperationException success) {}
255	dl	1.1	}
256
257	dl	1.4	/**
258			* toString holds toString of elements
259			*/
260			public void testToString() {
261	jsr166	1.25	assertEquals("[]", new CopyOnWriteArraySet().toString());
262	jsr166	1.31	Collection full = populatedSet(3);
263	dl	1.1	String s = full.toString();
264	jsr166	1.25	for (int i = 0; i < 3; ++i)
265	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
266	jsr166	1.25	assertEquals(new ArrayList(full).toString(),
267			full.toString());
268	jsr166	1.8	}
269	dl	1.1
270			/**
271	jsr166	1.16	* removeAll removes all elements from the given collection
272	dl	1.1	*/
273	dl	1.4	public void testRemoveAll() {
274	jsr166	1.31	Set full = populatedSet(3);
275	jsr166	1.30	assertTrue(full.removeAll(Arrays.asList(one, two)));
276			assertEquals(1, full.size());
277			assertFalse(full.removeAll(Arrays.asList(one, two)));
278	jsr166	1.11	assertEquals(1, full.size());
279	dl	1.1	}
280
281	dl	1.4	/**
282			* remove removes an element
283			*/
284			public void testRemove() {
285	jsr166	1.31	Collection full = populatedSet(3);
286	jsr166	1.11	full.remove(one);
287	dl	1.3	assertFalse(full.contains(one));
288	jsr166	1.11	assertEquals(2, full.size());
289	dl	1.1	}
290
291			/**
292	jsr166	1.16	* size returns the number of elements
293	dl	1.1	*/
294	dl	1.4	public void testSize() {
295	jsr166	1.31	Collection empty = new CopyOnWriteArraySet();
296			Collection full = populatedSet(3);
297	jsr166	1.11	assertEquals(3, full.size());
298			assertEquals(0, empty.size());
299	dl	1.1	}
300
301			/**
302	jsr166	1.21	* toArray() returns an Object array containing all elements from
303			* the set in insertion order
304	dl	1.1	*/
305	dl	1.4	public void testToArray() {
306	jsr166	1.21	Object[] a = new CopyOnWriteArraySet().toArray();
307			assertTrue(Arrays.equals(new Object[0], a));
308			assertSame(Object[].class, a.getClass());
309
310			Integer[] elements = new Integer[SIZE];
311	jsr166	1.20	for (int i = 0; i < SIZE; i++)
312	jsr166	1.21	elements[i] = i;
313	jsr166	1.36	shuffle(elements);
314	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
315	jsr166	1.21
316			assertTrue(Arrays.equals(elements, full.toArray()));
317			assertSame(Object[].class, full.toArray().getClass());
318	dl	1.1	}
319
320			/**
321	jsr166	1.21	* toArray(Integer array) returns an Integer array containing all
322			* elements from the set in insertion order
323	dl	1.1	*/
324	dl	1.4	public void testToArray2() {
325	jsr166	1.22	Collection empty = new CopyOnWriteArraySet();
326	jsr166	1.21	Integer[] a;
327
328			a = new Integer[0];
329			assertSame(a, empty.toArray(a));
330
331	jsr166	1.34	a = new Integer[SIZE / 2];
332	jsr166	1.21	Arrays.fill(a, 42);
333			assertSame(a, empty.toArray(a));
334			assertNull(a[0]);
335			for (int i = 1; i < a.length; i++)
336			assertEquals(42, (int) a[i]);
337
338			Integer[] elements = new Integer[SIZE];
339	jsr166	1.20	for (int i = 0; i < SIZE; i++)
340	jsr166	1.21	elements[i] = i;
341	jsr166	1.36	shuffle(elements);
342	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
343	jsr166	1.21
344			Arrays.fill(a, 42);
345			assertTrue(Arrays.equals(elements, full.toArray(a)));
346			for (int i = 0; i < a.length; i++)
347			assertEquals(42, (int) a[i]);
348			assertSame(Integer[].class, full.toArray(a).getClass());
349
350			a = new Integer[SIZE];
351			Arrays.fill(a, 42);
352			assertSame(a, full.toArray(a));
353			assertTrue(Arrays.equals(elements, a));
354
355	jsr166	1.34	a = new Integer[2 * SIZE];
356	jsr166	1.21	Arrays.fill(a, 42);
357			assertSame(a, full.toArray(a));
358			assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
359			assertNull(a[SIZE]);
360			for (int i = SIZE + 1; i < a.length; i++)
361			assertEquals(42, (int) a[i]);
362	dl	1.1	}
363
364			/**
365	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
366			* not store the objects inside the set
367	dl	1.1	*/
368	dl	1.4	public void testToArray_ArrayStoreException() {
369	jsr166	1.33	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
370			c.add("zfasdfsdf");
371			c.add("asdadasd");
372	dl	1.4	try {
373	dl	1.1	c.toArray(new Long[5]);
374	jsr166	1.11	shouldThrow();
375	jsr166	1.13	} catch (ArrayStoreException success) {}
376	dl	1.2	}
377
378	dl	1.4	/**
379	dl	1.7	* A deserialized serialized set is equal
380	dl	1.4	*/
381	jsr166	1.12	public void testSerialization() throws Exception {
382	jsr166	1.19	Set x = populatedSet(SIZE);
383			Set y = serialClone(x);
384	dl	1.2
385	jsr166	1.27	assertNotSame(y, x);
386	jsr166	1.19	assertEquals(x.size(), y.size());
387	jsr166	1.23	assertEquals(x.toString(), y.toString());
388			assertTrue(Arrays.equals(x.toArray(), y.toArray()));
389	jsr166	1.19	assertEquals(x, y);
390			assertEquals(y, x);
391	dl	1.1	}
392
393	jsr166	1.26	/**
394			* addAll is idempotent
395			*/
396			public void testAddAll_idempotent() throws Exception {
397			Set x = populatedSet(SIZE);
398			Set y = new CopyOnWriteArraySet(x);
399			y.addAll(x);
400			assertEquals(x, y);
401			assertEquals(y, x);
402			}
403
404	dl	1.1	}