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;

public class CopyOnWriteArraySetTest extends JSR166TestCase {
    public static void main(String[] args) {
        main(suite(), args);
    }
    public static Test suite() {
        class Implementation implements CollectionImplementation {
            public Class<?> klazz() { return CopyOnWriteArraySet.class; }
            public Set emptyCollection() { return new CopyOnWriteArraySet(); }
            public Object makeElement(int i) { return i; }
            public boolean isConcurrent() { return true; }
            public boolean permitsNulls() { return true; }
        }
        return newTestSuite(
                CopyOnWriteArraySetTest.class,
                CollectionTest.testSuite(new Implementation()));
    }

    static CopyOnWriteArraySet<Integer> populatedSet(int n) {
        CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<>();
        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<>();
        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/reserialized set equals original
     */
    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:	1.41
Committed:	Tue May 8 00:25:33 2018 UTC (6 years ago) by jsr166
Branch:	MAIN
Changes since 1.40:	+0 -1 lines
Log Message:	remove unused import
#	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
19	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
20	dl	1.1	public static void main(String[] args) {
21	jsr166	1.32	main(suite(), args);
22	dl	1.1	}
23			public static Test suite() {
24	jsr166	1.40	class Implementation implements CollectionImplementation {
25			public Class<?> klazz() { return CopyOnWriteArraySet.class; }
26			public Set emptyCollection() { return new CopyOnWriteArraySet(); }
27			public Object makeElement(int i) { return i; }
28			public boolean isConcurrent() { return true; }
29			public boolean permitsNulls() { return true; }
30			}
31			return newTestSuite(
32			CopyOnWriteArraySetTest.class,
33			CollectionTest.testSuite(new Implementation()));
34	dl	1.1	}
35
36	jsr166	1.21	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
37	jsr166	1.38	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<>();
38	dl	1.1	assertTrue(a.isEmpty());
39	jsr166	1.22	for (int i = 0; i < n; i++)
40	jsr166	1.21	a.add(i);
41	jsr166	1.31	assertEquals(n == 0, a.isEmpty());
42	dl	1.1	assertEquals(n, a.size());
43			return a;
44			}
45
46	jsr166	1.21	static CopyOnWriteArraySet populatedSet(Integer[] elements) {
47	jsr166	1.38	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<>();
48	jsr166	1.21	assertTrue(a.isEmpty());
49			for (int i = 0; i < elements.length; i++)
50			a.add(elements[i]);
51			assertFalse(a.isEmpty());
52			assertEquals(elements.length, a.size());
53			return a;
54			}
55
56	dl	1.4	/**
57			* Default-constructed set is empty
58			*/
59	dl	1.3	public void testConstructor() {
60	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
61	dl	1.3	assertTrue(a.isEmpty());
62			}
63
64	dl	1.4	/**
65	dl	1.5	* Collection-constructed set holds all of its elements
66	dl	1.4	*/
67	dl	1.3	public void testConstructor3() {
68			Integer[] ints = new Integer[SIZE];
69	jsr166	1.34	for (int i = 0; i < SIZE - 1; ++i)
70	dl	1.3	ints[i] = new Integer(i);
71	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
72	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
73	dl	1.3	assertTrue(a.contains(ints[i]));
74			}
75	jsr166	1.8
76	dl	1.1	/**
77	jsr166	1.31	* addAll adds each non-duplicate element from the given collection
78	dl	1.1	*/
79	dl	1.4	public void testAddAll() {
80	jsr166	1.31	Set full = populatedSet(3);
81	jsr166	1.30	assertTrue(full.addAll(Arrays.asList(three, four, five)));
82			assertEquals(6, full.size());
83			assertFalse(full.addAll(Arrays.asList(three, four, five)));
84	jsr166	1.11	assertEquals(6, full.size());
85	dl	1.1	}
86
87			/**
88	jsr166	1.31	* addAll adds each non-duplicate element from the given collection
89	dl	1.1	*/
90	dl	1.4	public void testAddAll2() {
91	jsr166	1.31	Set full = populatedSet(3);
92	jsr166	1.30	// "one" is duplicate and will not be added
93			assertTrue(full.addAll(Arrays.asList(three, four, one)));
94			assertEquals(5, full.size());
95			assertFalse(full.addAll(Arrays.asList(three, four, one)));
96	jsr166	1.11	assertEquals(5, full.size());
97	dl	1.1	}
98
99			/**
100	jsr166	1.16	* add will not add the element if it already exists in the set
101	dl	1.1	*/
102	dl	1.4	public void testAdd2() {
103	jsr166	1.31	Set full = populatedSet(3);
104	jsr166	1.11	full.add(one);
105			assertEquals(3, full.size());
106	dl	1.1	}
107
108			/**
109	jsr166	1.16	* add adds the element when it does not exist in the set
110	dl	1.1	*/
111	dl	1.4	public void testAdd3() {
112	jsr166	1.31	Set full = populatedSet(3);
113	dl	1.3	full.add(three);
114			assertTrue(full.contains(three));
115	dl	1.1	}
116
117			/**
118	jsr166	1.16	* clear removes all elements from the set
119	dl	1.1	*/
120	dl	1.4	public void testClear() {
121	jsr166	1.31	Collection full = populatedSet(3);
122	jsr166	1.11	full.clear();
123			assertEquals(0, full.size());
124	jsr166	1.31	assertTrue(full.isEmpty());
125	dl	1.1	}
126
127			/**
128	jsr166	1.16	* contains returns true for added elements
129	dl	1.1	*/
130	dl	1.4	public void testContains() {
131	jsr166	1.31	Collection full = populatedSet(3);
132	jsr166	1.11	assertTrue(full.contains(one));
133			assertFalse(full.contains(five));
134	dl	1.1	}
135
136	dl	1.4	/**
137			* Sets with equal elements are equal
138			*/
139	dl	1.1	public void testEquals() {
140	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
141			CopyOnWriteArraySet b = populatedSet(3);
142	dl	1.1	assertTrue(a.equals(b));
143			assertTrue(b.equals(a));
144	jsr166	1.35	assertTrue(a.containsAll(b));
145			assertTrue(b.containsAll(a));
146	dl	1.1	assertEquals(a.hashCode(), b.hashCode());
147	jsr166	1.35	assertEquals(a.size(), b.size());
148
149	dl	1.3	a.add(m1);
150	dl	1.1	assertFalse(a.equals(b));
151			assertFalse(b.equals(a));
152	jsr166	1.35	assertTrue(a.containsAll(b));
153			assertFalse(b.containsAll(a));
154	dl	1.3	b.add(m1);
155	dl	1.1	assertTrue(a.equals(b));
156			assertTrue(b.equals(a));
157	jsr166	1.35	assertTrue(a.containsAll(b));
158			assertTrue(b.containsAll(a));
159			assertEquals(a.hashCode(), b.hashCode());
160
161			Object x = a.iterator().next();
162			a.remove(x);
163			assertFalse(a.equals(b));
164			assertFalse(b.equals(a));
165			assertFalse(a.containsAll(b));
166			assertTrue(b.containsAll(a));
167			a.add(x);
168			assertTrue(a.equals(b));
169			assertTrue(b.equals(a));
170			assertTrue(a.containsAll(b));
171			assertTrue(b.containsAll(a));
172	dl	1.1	assertEquals(a.hashCode(), b.hashCode());
173	jsr166	1.35	assertEquals(a.size(), b.size());
174
175			CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
176			CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
177			assertTrue(empty1.equals(empty1));
178			assertTrue(empty1.equals(empty2));
179
180			assertFalse(empty1.equals(a));
181			assertFalse(a.equals(empty1));
182
183			assertFalse(a.equals(null));
184	dl	1.1	}
185
186			/**
187	jsr166	1.16	* containsAll returns true for collections with subset of elements
188	dl	1.1	*/
189	dl	1.4	public void testContainsAll() {
190	jsr166	1.31	Collection full = populatedSet(3);
191	jsr166	1.35	assertTrue(full.containsAll(full));
192	jsr166	1.30	assertTrue(full.containsAll(Arrays.asList()));
193			assertTrue(full.containsAll(Arrays.asList(one)));
194			assertTrue(full.containsAll(Arrays.asList(one, two)));
195			assertFalse(full.containsAll(Arrays.asList(one, two, six)));
196			assertFalse(full.containsAll(Arrays.asList(six)));
197	jsr166	1.35
198			CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
199			CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
200			assertTrue(empty1.containsAll(empty2));
201			assertTrue(empty1.containsAll(empty1));
202			assertFalse(empty1.containsAll(full));
203			assertTrue(full.containsAll(empty1));
204
205			try {
206			full.containsAll(null);
207			shouldThrow();
208			} catch (NullPointerException success) {}
209	dl	1.1	}
210
211			/**
212	jsr166	1.16	* isEmpty is true when empty, else false
213	dl	1.1	*/
214	dl	1.4	public void testIsEmpty() {
215	jsr166	1.31	assertTrue(populatedSet(0).isEmpty());
216			assertFalse(populatedSet(3).isEmpty());
217	dl	1.1	}
218
219			/**
220	jsr166	1.24	* iterator() returns an iterator containing the elements of the
221			* set in insertion order
222	dl	1.1	*/
223	dl	1.4	public void testIterator() {
224	jsr166	1.25	Collection empty = new CopyOnWriteArraySet();
225	jsr166	1.24	assertFalse(empty.iterator().hasNext());
226			try {
227			empty.iterator().next();
228			shouldThrow();
229			} catch (NoSuchElementException success) {}
230
231			Integer[] elements = new Integer[SIZE];
232			for (int i = 0; i < SIZE; i++)
233			elements[i] = i;
234	jsr166	1.36	shuffle(elements);
235	jsr166	1.24	Collection<Integer> full = populatedSet(elements);
236
237			Iterator it = full.iterator();
238			for (int j = 0; j < SIZE; j++) {
239			assertTrue(it.hasNext());
240			assertEquals(elements[j], it.next());
241			}
242	jsr166	1.29	assertIteratorExhausted(it);
243			}
244
245			/**
246			* iterator of empty collection has no elements
247			*/
248			public void testEmptyIterator() {
249			assertIteratorExhausted(new CopyOnWriteArraySet().iterator());
250	dl	1.1	}
251
252	dl	1.4	/**
253			* iterator remove is unsupported
254			*/
255	jsr166	1.15	public void testIteratorRemove() {
256	jsr166	1.31	Collection full = populatedSet(3);
257	dl	1.1	Iterator it = full.iterator();
258			it.next();
259			try {
260			it.remove();
261	dl	1.4	shouldThrow();
262	jsr166	1.12	} catch (UnsupportedOperationException success) {}
263	dl	1.1	}
264
265	dl	1.4	/**
266			* toString holds toString of elements
267			*/
268			public void testToString() {
269	jsr166	1.25	assertEquals("[]", new CopyOnWriteArraySet().toString());
270	jsr166	1.31	Collection full = populatedSet(3);
271	dl	1.1	String s = full.toString();
272	jsr166	1.25	for (int i = 0; i < 3; ++i)
273	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
274	jsr166	1.25	assertEquals(new ArrayList(full).toString(),
275			full.toString());
276	jsr166	1.8	}
277	dl	1.1
278			/**
279	jsr166	1.16	* removeAll removes all elements from the given collection
280	dl	1.1	*/
281	dl	1.4	public void testRemoveAll() {
282	jsr166	1.31	Set full = populatedSet(3);
283	jsr166	1.30	assertTrue(full.removeAll(Arrays.asList(one, two)));
284			assertEquals(1, full.size());
285			assertFalse(full.removeAll(Arrays.asList(one, two)));
286	jsr166	1.11	assertEquals(1, full.size());
287	dl	1.1	}
288
289	dl	1.4	/**
290			* remove removes an element
291			*/
292			public void testRemove() {
293	jsr166	1.31	Collection full = populatedSet(3);
294	jsr166	1.11	full.remove(one);
295	dl	1.3	assertFalse(full.contains(one));
296	jsr166	1.11	assertEquals(2, full.size());
297	dl	1.1	}
298
299			/**
300	jsr166	1.16	* size returns the number of elements
301	dl	1.1	*/
302	dl	1.4	public void testSize() {
303	jsr166	1.31	Collection empty = new CopyOnWriteArraySet();
304			Collection full = populatedSet(3);
305	jsr166	1.11	assertEquals(3, full.size());
306			assertEquals(0, empty.size());
307	dl	1.1	}
308
309			/**
310	jsr166	1.21	* toArray() returns an Object array containing all elements from
311			* the set in insertion order
312	dl	1.1	*/
313	dl	1.4	public void testToArray() {
314	jsr166	1.21	Object[] a = new CopyOnWriteArraySet().toArray();
315			assertTrue(Arrays.equals(new Object[0], a));
316			assertSame(Object[].class, a.getClass());
317
318			Integer[] elements = new Integer[SIZE];
319	jsr166	1.20	for (int i = 0; i < SIZE; i++)
320	jsr166	1.21	elements[i] = i;
321	jsr166	1.36	shuffle(elements);
322	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
323	jsr166	1.21
324			assertTrue(Arrays.equals(elements, full.toArray()));
325			assertSame(Object[].class, full.toArray().getClass());
326	dl	1.1	}
327
328			/**
329	jsr166	1.21	* toArray(Integer array) returns an Integer array containing all
330			* elements from the set in insertion order
331	dl	1.1	*/
332	dl	1.4	public void testToArray2() {
333	jsr166	1.22	Collection empty = new CopyOnWriteArraySet();
334	jsr166	1.21	Integer[] a;
335
336			a = new Integer[0];
337			assertSame(a, empty.toArray(a));
338
339	jsr166	1.34	a = new Integer[SIZE / 2];
340	jsr166	1.21	Arrays.fill(a, 42);
341			assertSame(a, empty.toArray(a));
342			assertNull(a[0]);
343			for (int i = 1; i < a.length; i++)
344			assertEquals(42, (int) a[i]);
345
346			Integer[] elements = new Integer[SIZE];
347	jsr166	1.20	for (int i = 0; i < SIZE; i++)
348	jsr166	1.21	elements[i] = i;
349	jsr166	1.36	shuffle(elements);
350	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
351	jsr166	1.21
352			Arrays.fill(a, 42);
353			assertTrue(Arrays.equals(elements, full.toArray(a)));
354			for (int i = 0; i < a.length; i++)
355			assertEquals(42, (int) a[i]);
356			assertSame(Integer[].class, full.toArray(a).getClass());
357
358			a = new Integer[SIZE];
359			Arrays.fill(a, 42);
360			assertSame(a, full.toArray(a));
361			assertTrue(Arrays.equals(elements, a));
362
363	jsr166	1.34	a = new Integer[2 * SIZE];
364	jsr166	1.21	Arrays.fill(a, 42);
365			assertSame(a, full.toArray(a));
366			assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
367			assertNull(a[SIZE]);
368			for (int i = SIZE + 1; i < a.length; i++)
369			assertEquals(42, (int) a[i]);
370	dl	1.1	}
371
372			/**
373	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
374			* not store the objects inside the set
375	dl	1.1	*/
376	dl	1.4	public void testToArray_ArrayStoreException() {
377	jsr166	1.33	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
378			c.add("zfasdfsdf");
379			c.add("asdadasd");
380	dl	1.4	try {
381	dl	1.1	c.toArray(new Long[5]);
382	jsr166	1.11	shouldThrow();
383	jsr166	1.13	} catch (ArrayStoreException success) {}
384	dl	1.2	}
385
386	dl	1.4	/**
387	jsr166	1.39	* A deserialized/reserialized set equals original
388	dl	1.4	*/
389	jsr166	1.12	public void testSerialization() throws Exception {
390	jsr166	1.19	Set x = populatedSet(SIZE);
391			Set y = serialClone(x);
392	dl	1.2
393	jsr166	1.27	assertNotSame(y, x);
394	jsr166	1.19	assertEquals(x.size(), y.size());
395	jsr166	1.23	assertEquals(x.toString(), y.toString());
396			assertTrue(Arrays.equals(x.toArray(), y.toArray()));
397	jsr166	1.19	assertEquals(x, y);
398			assertEquals(y, x);
399	dl	1.1	}
400
401	jsr166	1.26	/**
402			* addAll is idempotent
403			*/
404			public void testAddAll_idempotent() throws Exception {
405			Set x = populatedSet(SIZE);
406			Set y = new CopyOnWriteArraySet(x);
407			y.addAll(x);
408			assertEquals(x, y);
409			assertEquals(y, x);
410			}
411
412	dl	1.1	}