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 junit.framework.*;
import java.util.*;
import java.util.concurrent.*;
import java.io.*;

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 populatedSet(int n) {
        CopyOnWriteArraySet a = new CopyOnWriteArraySet();
        assertTrue(a.isEmpty());
        for (int i = 0; i < n; ++i)
            a.add(new Integer(i));
        assertFalse(a.isEmpty());
        assertEquals(n, 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);
        Vector v = new Vector();
        v.add(three);
        v.add(four);
        v.add(five);
        full.addAll(v);
        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);
        Vector v = new Vector();
        v.add(three);
        v.add(four);
        v.add(one); // will not add this element
        full.addAll(v);
        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);
        Vector v = new Vector();
        v.add(one);
        v.add(two);
        assertTrue(full.containsAll(v));
        v.add(six);
        assertFalse(full.containsAll(v));
    }

    /**
     * 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
     */
    public void testIterator() {
        CopyOnWriteArraySet full = populatedSet(3);
        Iterator i = full.iterator();
        int j;
        for (j = 0; i.hasNext(); j++)
            assertEquals(j, i.next());
        assertEquals(3, j);
    }

    /**
     * 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() {
        CopyOnWriteArraySet full = populatedSet(3);
        String s = full.toString();
        for (int i = 0; i < 3; ++i) {
            assertTrue(s.indexOf(String.valueOf(i)) >= 0);
        }
    }


    /**
     * removeAll removes all elements from the given collection
     */
    public void testRemoveAll() {
        CopyOnWriteArraySet full = populatedSet(3);
        Vector v = new Vector();
        v.add(one);
        v.add(two);
        full.removeAll(v);
        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
     */
    public void testToArray() {
        CopyOnWriteArraySet full = populatedSet(3);
        Object[] o = full.toArray();
        assertEquals(3, o.length);
        assertEquals(0, o[0]);
        assertEquals(1, o[1]);
        assertEquals(2, o[2]);
    }

    /**
     * toArray returns an Integer array containing all elements from
     * the set
     */
    public void testToArray2() {
        CopyOnWriteArraySet full = populatedSet(3);
        Integer[] i = new Integer[3];
        i = (Integer[])full.toArray(i);
        assertEquals(3, i.length);
        assertEquals(0, (int) i[0]);
        assertEquals(1, (int) i[1]);
        assertEquals(2, (int) i[2]);
    }


    /**
     * 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 {
        CopyOnWriteArraySet q = populatedSet(SIZE);

        ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
        ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
        out.writeObject(q);
        out.close();

        ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
        ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
        CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
        assertEquals(q.size(), r.size());
        assertTrue(q.equals(r));
        assertTrue(r.equals(q));
    }

}
Revision:	1.17
Committed:	Tue Mar 15 19:47:06 2011 UTC (13 years, 2 months ago) by jsr166
Branch:	MAIN
CVS Tags:	release-1_7_0
Changes since 1.16:	+1 -1 lines
Log Message:	Update Creative Commons license URL in legal notices
#	Content
1	/*
2	* 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	* http://creativecommons.org/publicdomain/zero/1.0/
5	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	* Pat Fisher, Mike Judd.
7	*/
8
9	import junit.framework.*;
10	import java.util.*;
11	import java.util.concurrent.*;
12	import java.io.*;
13
14	public class CopyOnWriteArraySetTest extends JSR166TestCase {
15	public static void main(String[] args) {
16	junit.textui.TestRunner.run(suite());
17	}
18	public static Test suite() {
19	return new TestSuite(CopyOnWriteArraySetTest.class);
20	}
21
22	static CopyOnWriteArraySet populatedSet(int n) {
23	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
24	assertTrue(a.isEmpty());
25	for (int i = 0; i < n; ++i)
26	a.add(new Integer(i));
27	assertFalse(a.isEmpty());
28	assertEquals(n, a.size());
29	return a;
30	}
31
32	/**
33	* Default-constructed set is empty
34	*/
35	public void testConstructor() {
36	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
37	assertTrue(a.isEmpty());
38	}
39
40	/**
41	* Collection-constructed set holds all of its elements
42	*/
43	public void testConstructor3() {
44	Integer[] ints = new Integer[SIZE];
45	for (int i = 0; i < SIZE-1; ++i)
46	ints[i] = new Integer(i);
47	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
48	for (int i = 0; i < SIZE; ++i)
49	assertTrue(a.contains(ints[i]));
50	}
51
52
53	/**
54	* addAll adds each element from the given collection
55	*/
56	public void testAddAll() {
57	CopyOnWriteArraySet full = populatedSet(3);
58	Vector v = new Vector();
59	v.add(three);
60	v.add(four);
61	v.add(five);
62	full.addAll(v);
63	assertEquals(6, full.size());
64	}
65
66	/**
67	* addAll adds each element from the given collection that did not
68	* already exist in the set
69	*/
70	public void testAddAll2() {
71	CopyOnWriteArraySet full = populatedSet(3);
72	Vector v = new Vector();
73	v.add(three);
74	v.add(four);
75	v.add(one); // will not add this element
76	full.addAll(v);
77	assertEquals(5, full.size());
78	}
79
80	/**
81	* add will not add the element if it already exists in the set
82	*/
83	public void testAdd2() {
84	CopyOnWriteArraySet full = populatedSet(3);
85	full.add(one);
86	assertEquals(3, full.size());
87	}
88
89	/**
90	* add adds the element when it does not exist in the set
91	*/
92	public void testAdd3() {
93	CopyOnWriteArraySet full = populatedSet(3);
94	full.add(three);
95	assertTrue(full.contains(three));
96	}
97
98	/**
99	* clear removes all elements from the set
100	*/
101	public void testClear() {
102	CopyOnWriteArraySet full = populatedSet(3);
103	full.clear();
104	assertEquals(0, full.size());
105	}
106
107	/**
108	* contains returns true for added elements
109	*/
110	public void testContains() {
111	CopyOnWriteArraySet full = populatedSet(3);
112	assertTrue(full.contains(one));
113	assertFalse(full.contains(five));
114	}
115
116	/**
117	* Sets with equal elements are equal
118	*/
119	public void testEquals() {
120	CopyOnWriteArraySet a = populatedSet(3);
121	CopyOnWriteArraySet b = populatedSet(3);
122	assertTrue(a.equals(b));
123	assertTrue(b.equals(a));
124	assertEquals(a.hashCode(), b.hashCode());
125	a.add(m1);
126	assertFalse(a.equals(b));
127	assertFalse(b.equals(a));
128	b.add(m1);
129	assertTrue(a.equals(b));
130	assertTrue(b.equals(a));
131	assertEquals(a.hashCode(), b.hashCode());
132	}
133
134
135	/**
136	* containsAll returns true for collections with subset of elements
137	*/
138	public void testContainsAll() {
139	CopyOnWriteArraySet full = populatedSet(3);
140	Vector v = new Vector();
141	v.add(one);
142	v.add(two);
143	assertTrue(full.containsAll(v));
144	v.add(six);
145	assertFalse(full.containsAll(v));
146	}
147
148	/**
149	* isEmpty is true when empty, else false
150	*/
151	public void testIsEmpty() {
152	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
153	CopyOnWriteArraySet full = populatedSet(3);
154	assertTrue(empty.isEmpty());
155	assertFalse(full.isEmpty());
156	}
157
158	/**
159	* iterator() returns an iterator containing the elements of the set
160	*/
161	public void testIterator() {
162	CopyOnWriteArraySet full = populatedSet(3);
163	Iterator i = full.iterator();
164	int j;
165	for (j = 0; i.hasNext(); j++)
166	assertEquals(j, i.next());
167	assertEquals(3, j);
168	}
169
170	/**
171	* iterator remove is unsupported
172	*/
173	public void testIteratorRemove() {
174	CopyOnWriteArraySet full = populatedSet(3);
175	Iterator it = full.iterator();
176	it.next();
177	try {
178	it.remove();
179	shouldThrow();
180	} catch (UnsupportedOperationException success) {}
181	}
182
183	/**
184	* toString holds toString of elements
185	*/
186	public void testToString() {
187	CopyOnWriteArraySet full = populatedSet(3);
188	String s = full.toString();
189	for (int i = 0; i < 3; ++i) {
190	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
191	}
192	}
193
194
195	/**
196	* removeAll removes all elements from the given collection
197	*/
198	public void testRemoveAll() {
199	CopyOnWriteArraySet full = populatedSet(3);
200	Vector v = new Vector();
201	v.add(one);
202	v.add(two);
203	full.removeAll(v);
204	assertEquals(1, full.size());
205	}
206
207
208	/**
209	* remove removes an element
210	*/
211	public void testRemove() {
212	CopyOnWriteArraySet full = populatedSet(3);
213	full.remove(one);
214	assertFalse(full.contains(one));
215	assertEquals(2, full.size());
216	}
217
218	/**
219	* size returns the number of elements
220	*/
221	public void testSize() {
222	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
223	CopyOnWriteArraySet full = populatedSet(3);
224	assertEquals(3, full.size());
225	assertEquals(0, empty.size());
226	}
227
228	/**
229	* toArray returns an Object array containing all elements from the set
230	*/
231	public void testToArray() {
232	CopyOnWriteArraySet full = populatedSet(3);
233	Object[] o = full.toArray();
234	assertEquals(3, o.length);
235	assertEquals(0, o[0]);
236	assertEquals(1, o[1]);
237	assertEquals(2, o[2]);
238	}
239
240	/**
241	* toArray returns an Integer array containing all elements from
242	* the set
243	*/
244	public void testToArray2() {
245	CopyOnWriteArraySet full = populatedSet(3);
246	Integer[] i = new Integer[3];
247	i = (Integer[])full.toArray(i);
248	assertEquals(3, i.length);
249	assertEquals(0, (int) i[0]);
250	assertEquals(1, (int) i[1]);
251	assertEquals(2, (int) i[2]);
252	}
253
254
255	/**
256	* toArray throws an ArrayStoreException when the given array can
257	* not store the objects inside the set
258	*/
259	public void testToArray_ArrayStoreException() {
260	try {
261	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
262	c.add("zfasdfsdf");
263	c.add("asdadasd");
264	c.toArray(new Long[5]);
265	shouldThrow();
266	} catch (ArrayStoreException success) {}
267	}
268
269	/**
270	* A deserialized serialized set is equal
271	*/
272	public void testSerialization() throws Exception {
273	CopyOnWriteArraySet q = populatedSet(SIZE);
274
275	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
276	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
277	out.writeObject(q);
278	out.close();
279
280	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
281	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
282	CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
283	assertEquals(q.size(), r.size());
284	assertTrue(q.equals(r));
285	assertTrue(r.equals(q));
286	}
287
288	}