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() {
        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:	1.40
Committed:	Thu Apr 5 02:20:21 2018 UTC (6 years, 1 month ago) by jsr166
Branch:	MAIN
Changes since 1.39:	+10 -1 lines
Log Message:	test CopyOnWriteArraySet with CollectionTest infrastrure
#	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	1.40	class Implementation implements CollectionImplementation {
26			public Class<?> klazz() { return CopyOnWriteArraySet.class; }
27			public Set emptyCollection() { return new CopyOnWriteArraySet(); }
28			public Object makeElement(int i) { return i; }
29			public boolean isConcurrent() { return true; }
30			public boolean permitsNulls() { return true; }
31			}
32			return newTestSuite(
33			CopyOnWriteArraySetTest.class,
34			CollectionTest.testSuite(new Implementation()));
35	dl	1.1	}
36
37	jsr166	1.21	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
38	jsr166	1.38	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<>();
39	dl	1.1	assertTrue(a.isEmpty());
40	jsr166	1.22	for (int i = 0; i < n; i++)
41	jsr166	1.21	a.add(i);
42	jsr166	1.31	assertEquals(n == 0, a.isEmpty());
43	dl	1.1	assertEquals(n, a.size());
44			return a;
45			}
46
47	jsr166	1.21	static CopyOnWriteArraySet populatedSet(Integer[] elements) {
48	jsr166	1.38	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<>();
49	jsr166	1.21	assertTrue(a.isEmpty());
50			for (int i = 0; i < elements.length; i++)
51			a.add(elements[i]);
52			assertFalse(a.isEmpty());
53			assertEquals(elements.length, a.size());
54			return a;
55			}
56
57	dl	1.4	/**
58			* Default-constructed set is empty
59			*/
60	dl	1.3	public void testConstructor() {
61	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
62	dl	1.3	assertTrue(a.isEmpty());
63			}
64
65	dl	1.4	/**
66	dl	1.5	* Collection-constructed set holds all of its elements
67	dl	1.4	*/
68	dl	1.3	public void testConstructor3() {
69			Integer[] ints = new Integer[SIZE];
70	jsr166	1.34	for (int i = 0; i < SIZE - 1; ++i)
71	dl	1.3	ints[i] = new Integer(i);
72	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
73	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
74	dl	1.3	assertTrue(a.contains(ints[i]));
75			}
76	jsr166	1.8
77	dl	1.1	/**
78	jsr166	1.31	* addAll adds each non-duplicate element from the given collection
79	dl	1.1	*/
80	dl	1.4	public void testAddAll() {
81	jsr166	1.31	Set full = populatedSet(3);
82	jsr166	1.30	assertTrue(full.addAll(Arrays.asList(three, four, five)));
83			assertEquals(6, full.size());
84			assertFalse(full.addAll(Arrays.asList(three, four, five)));
85	jsr166	1.11	assertEquals(6, full.size());
86	dl	1.1	}
87
88			/**
89	jsr166	1.31	* addAll adds each non-duplicate element from the given collection
90	dl	1.1	*/
91	dl	1.4	public void testAddAll2() {
92	jsr166	1.31	Set full = populatedSet(3);
93	jsr166	1.30	// "one" is duplicate and will not be added
94			assertTrue(full.addAll(Arrays.asList(three, four, one)));
95			assertEquals(5, full.size());
96			assertFalse(full.addAll(Arrays.asList(three, four, one)));
97	jsr166	1.11	assertEquals(5, full.size());
98	dl	1.1	}
99
100			/**
101	jsr166	1.16	* add will not add the element if it already exists in the set
102	dl	1.1	*/
103	dl	1.4	public void testAdd2() {
104	jsr166	1.31	Set full = populatedSet(3);
105	jsr166	1.11	full.add(one);
106			assertEquals(3, full.size());
107	dl	1.1	}
108
109			/**
110	jsr166	1.16	* add adds the element when it does not exist in the set
111	dl	1.1	*/
112	dl	1.4	public void testAdd3() {
113	jsr166	1.31	Set full = populatedSet(3);
114	dl	1.3	full.add(three);
115			assertTrue(full.contains(three));
116	dl	1.1	}
117
118			/**
119	jsr166	1.16	* clear removes all elements from the set
120	dl	1.1	*/
121	dl	1.4	public void testClear() {
122	jsr166	1.31	Collection full = populatedSet(3);
123	jsr166	1.11	full.clear();
124			assertEquals(0, full.size());
125	jsr166	1.31	assertTrue(full.isEmpty());
126	dl	1.1	}
127
128			/**
129	jsr166	1.16	* contains returns true for added elements
130	dl	1.1	*/
131	dl	1.4	public void testContains() {
132	jsr166	1.31	Collection full = populatedSet(3);
133	jsr166	1.11	assertTrue(full.contains(one));
134			assertFalse(full.contains(five));
135	dl	1.1	}
136
137	dl	1.4	/**
138			* Sets with equal elements are equal
139			*/
140	dl	1.1	public void testEquals() {
141	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
142			CopyOnWriteArraySet b = populatedSet(3);
143	dl	1.1	assertTrue(a.equals(b));
144			assertTrue(b.equals(a));
145	jsr166	1.35	assertTrue(a.containsAll(b));
146			assertTrue(b.containsAll(a));
147	dl	1.1	assertEquals(a.hashCode(), b.hashCode());
148	jsr166	1.35	assertEquals(a.size(), b.size());
149
150	dl	1.3	a.add(m1);
151	dl	1.1	assertFalse(a.equals(b));
152			assertFalse(b.equals(a));
153	jsr166	1.35	assertTrue(a.containsAll(b));
154			assertFalse(b.containsAll(a));
155	dl	1.3	b.add(m1);
156	dl	1.1	assertTrue(a.equals(b));
157			assertTrue(b.equals(a));
158	jsr166	1.35	assertTrue(a.containsAll(b));
159			assertTrue(b.containsAll(a));
160			assertEquals(a.hashCode(), b.hashCode());
161
162			Object x = a.iterator().next();
163			a.remove(x);
164			assertFalse(a.equals(b));
165			assertFalse(b.equals(a));
166			assertFalse(a.containsAll(b));
167			assertTrue(b.containsAll(a));
168			a.add(x);
169			assertTrue(a.equals(b));
170			assertTrue(b.equals(a));
171			assertTrue(a.containsAll(b));
172			assertTrue(b.containsAll(a));
173	dl	1.1	assertEquals(a.hashCode(), b.hashCode());
174	jsr166	1.35	assertEquals(a.size(), b.size());
175
176			CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
177			CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
178			assertTrue(empty1.equals(empty1));
179			assertTrue(empty1.equals(empty2));
180
181			assertFalse(empty1.equals(a));
182			assertFalse(a.equals(empty1));
183
184			assertFalse(a.equals(null));
185	dl	1.1	}
186
187			/**
188	jsr166	1.16	* containsAll returns true for collections with subset of elements
189	dl	1.1	*/
190	dl	1.4	public void testContainsAll() {
191	jsr166	1.31	Collection full = populatedSet(3);
192	jsr166	1.35	assertTrue(full.containsAll(full));
193	jsr166	1.30	assertTrue(full.containsAll(Arrays.asList()));
194			assertTrue(full.containsAll(Arrays.asList(one)));
195			assertTrue(full.containsAll(Arrays.asList(one, two)));
196			assertFalse(full.containsAll(Arrays.asList(one, two, six)));
197			assertFalse(full.containsAll(Arrays.asList(six)));
198	jsr166	1.35
199			CopyOnWriteArraySet empty1 = new CopyOnWriteArraySet(Arrays.asList());
200			CopyOnWriteArraySet empty2 = new CopyOnWriteArraySet(Arrays.asList());
201			assertTrue(empty1.containsAll(empty2));
202			assertTrue(empty1.containsAll(empty1));
203			assertFalse(empty1.containsAll(full));
204			assertTrue(full.containsAll(empty1));
205
206			try {
207			full.containsAll(null);
208			shouldThrow();
209			} catch (NullPointerException success) {}
210	dl	1.1	}
211
212			/**
213	jsr166	1.16	* isEmpty is true when empty, else false
214	dl	1.1	*/
215	dl	1.4	public void testIsEmpty() {
216	jsr166	1.31	assertTrue(populatedSet(0).isEmpty());
217			assertFalse(populatedSet(3).isEmpty());
218	dl	1.1	}
219
220			/**
221	jsr166	1.24	* iterator() returns an iterator containing the elements of the
222			* set in insertion order
223	dl	1.1	*/
224	dl	1.4	public void testIterator() {
225	jsr166	1.25	Collection empty = new CopyOnWriteArraySet();
226	jsr166	1.24	assertFalse(empty.iterator().hasNext());
227			try {
228			empty.iterator().next();
229			shouldThrow();
230			} catch (NoSuchElementException success) {}
231
232			Integer[] elements = new Integer[SIZE];
233			for (int i = 0; i < SIZE; i++)
234			elements[i] = i;
235	jsr166	1.36	shuffle(elements);
236	jsr166	1.24	Collection<Integer> full = populatedSet(elements);
237
238			Iterator it = full.iterator();
239			for (int j = 0; j < SIZE; j++) {
240			assertTrue(it.hasNext());
241			assertEquals(elements[j], it.next());
242			}
243	jsr166	1.29	assertIteratorExhausted(it);
244			}
245
246			/**
247			* iterator of empty collection has no elements
248			*/
249			public void testEmptyIterator() {
250			assertIteratorExhausted(new CopyOnWriteArraySet().iterator());
251	dl	1.1	}
252
253	dl	1.4	/**
254			* iterator remove is unsupported
255			*/
256	jsr166	1.15	public void testIteratorRemove() {
257	jsr166	1.31	Collection full = populatedSet(3);
258	dl	1.1	Iterator it = full.iterator();
259			it.next();
260			try {
261			it.remove();
262	dl	1.4	shouldThrow();
263	jsr166	1.12	} catch (UnsupportedOperationException success) {}
264	dl	1.1	}
265
266	dl	1.4	/**
267			* toString holds toString of elements
268			*/
269			public void testToString() {
270	jsr166	1.25	assertEquals("[]", new CopyOnWriteArraySet().toString());
271	jsr166	1.31	Collection full = populatedSet(3);
272	dl	1.1	String s = full.toString();
273	jsr166	1.25	for (int i = 0; i < 3; ++i)
274	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
275	jsr166	1.25	assertEquals(new ArrayList(full).toString(),
276			full.toString());
277	jsr166	1.8	}
278	dl	1.1
279			/**
280	jsr166	1.16	* removeAll removes all elements from the given collection
281	dl	1.1	*/
282	dl	1.4	public void testRemoveAll() {
283	jsr166	1.31	Set full = populatedSet(3);
284	jsr166	1.30	assertTrue(full.removeAll(Arrays.asList(one, two)));
285			assertEquals(1, full.size());
286			assertFalse(full.removeAll(Arrays.asList(one, two)));
287	jsr166	1.11	assertEquals(1, full.size());
288	dl	1.1	}
289
290	dl	1.4	/**
291			* remove removes an element
292			*/
293			public void testRemove() {
294	jsr166	1.31	Collection full = populatedSet(3);
295	jsr166	1.11	full.remove(one);
296	dl	1.3	assertFalse(full.contains(one));
297	jsr166	1.11	assertEquals(2, full.size());
298	dl	1.1	}
299
300			/**
301	jsr166	1.16	* size returns the number of elements
302	dl	1.1	*/
303	dl	1.4	public void testSize() {
304	jsr166	1.31	Collection empty = new CopyOnWriteArraySet();
305			Collection full = populatedSet(3);
306	jsr166	1.11	assertEquals(3, full.size());
307			assertEquals(0, empty.size());
308	dl	1.1	}
309
310			/**
311	jsr166	1.21	* toArray() returns an Object array containing all elements from
312			* the set in insertion order
313	dl	1.1	*/
314	dl	1.4	public void testToArray() {
315	jsr166	1.21	Object[] a = new CopyOnWriteArraySet().toArray();
316			assertTrue(Arrays.equals(new Object[0], a));
317			assertSame(Object[].class, a.getClass());
318
319			Integer[] elements = new Integer[SIZE];
320	jsr166	1.20	for (int i = 0; i < SIZE; i++)
321	jsr166	1.21	elements[i] = i;
322	jsr166	1.36	shuffle(elements);
323	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
324	jsr166	1.21
325			assertTrue(Arrays.equals(elements, full.toArray()));
326			assertSame(Object[].class, full.toArray().getClass());
327	dl	1.1	}
328
329			/**
330	jsr166	1.21	* toArray(Integer array) returns an Integer array containing all
331			* elements from the set in insertion order
332	dl	1.1	*/
333	dl	1.4	public void testToArray2() {
334	jsr166	1.22	Collection empty = new CopyOnWriteArraySet();
335	jsr166	1.21	Integer[] a;
336
337			a = new Integer[0];
338			assertSame(a, empty.toArray(a));
339
340	jsr166	1.34	a = new Integer[SIZE / 2];
341	jsr166	1.21	Arrays.fill(a, 42);
342			assertSame(a, empty.toArray(a));
343			assertNull(a[0]);
344			for (int i = 1; i < a.length; i++)
345			assertEquals(42, (int) a[i]);
346
347			Integer[] elements = new Integer[SIZE];
348	jsr166	1.20	for (int i = 0; i < SIZE; i++)
349	jsr166	1.21	elements[i] = i;
350	jsr166	1.36	shuffle(elements);
351	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
352	jsr166	1.21
353			Arrays.fill(a, 42);
354			assertTrue(Arrays.equals(elements, full.toArray(a)));
355			for (int i = 0; i < a.length; i++)
356			assertEquals(42, (int) a[i]);
357			assertSame(Integer[].class, full.toArray(a).getClass());
358
359			a = new Integer[SIZE];
360			Arrays.fill(a, 42);
361			assertSame(a, full.toArray(a));
362			assertTrue(Arrays.equals(elements, a));
363
364	jsr166	1.34	a = new Integer[2 * SIZE];
365	jsr166	1.21	Arrays.fill(a, 42);
366			assertSame(a, full.toArray(a));
367			assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
368			assertNull(a[SIZE]);
369			for (int i = SIZE + 1; i < a.length; i++)
370			assertEquals(42, (int) a[i]);
371	dl	1.1	}
372
373			/**
374	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
375			* not store the objects inside the set
376	dl	1.1	*/
377	dl	1.4	public void testToArray_ArrayStoreException() {
378	jsr166	1.33	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
379			c.add("zfasdfsdf");
380			c.add("asdadasd");
381	dl	1.4	try {
382	dl	1.1	c.toArray(new Long[5]);
383	jsr166	1.11	shouldThrow();
384	jsr166	1.13	} catch (ArrayStoreException success) {}
385	dl	1.2	}
386
387	dl	1.4	/**
388	jsr166	1.39	* A deserialized/reserialized set equals original
389	dl	1.4	*/
390	jsr166	1.12	public void testSerialization() throws Exception {
391	jsr166	1.19	Set x = populatedSet(SIZE);
392			Set y = serialClone(x);
393	dl	1.2
394	jsr166	1.27	assertNotSame(y, x);
395	jsr166	1.19	assertEquals(x.size(), y.size());
396	jsr166	1.23	assertEquals(x.toString(), y.toString());
397			assertTrue(Arrays.equals(x.toArray(), y.toArray()));
398	jsr166	1.19	assertEquals(x, y);
399			assertEquals(y, x);
400	dl	1.1	}
401
402	jsr166	1.26	/**
403			* addAll is idempotent
404			*/
405			public void testAddAll_idempotent() throws Exception {
406			Set x = populatedSet(SIZE);
407			Set y = new CopyOnWriteArraySet(x);
408			y.addAll(x);
409			assertEquals(x, y);
410			assertEquals(y, x);
411			}
412
413	dl	1.1	}