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.contains(String.valueOf(i)));
        }
    }

    /**
     * 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:	1.18
Committed:	Fri May 27 19:26:42 2011 UTC (12 years, 11 months ago) by jsr166
Branch:	MAIN
Changes since 1.17:	+1 -6 lines
Log Message:	indexOf => contains
#	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	* addAll adds each element from the given collection
54	*/
55	public void testAddAll() {
56	CopyOnWriteArraySet full = populatedSet(3);
57	Vector v = new Vector();
58	v.add(three);
59	v.add(four);
60	v.add(five);
61	full.addAll(v);
62	assertEquals(6, full.size());
63	}
64
65	/**
66	* addAll adds each element from the given collection that did not
67	* already exist in the set
68	*/
69	public void testAddAll2() {
70	CopyOnWriteArraySet full = populatedSet(3);
71	Vector v = new Vector();
72	v.add(three);
73	v.add(four);
74	v.add(one); // will not add this element
75	full.addAll(v);
76	assertEquals(5, full.size());
77	}
78
79	/**
80	* add will not add the element if it already exists in the set
81	*/
82	public void testAdd2() {
83	CopyOnWriteArraySet full = populatedSet(3);
84	full.add(one);
85	assertEquals(3, full.size());
86	}
87
88	/**
89	* add adds the element when it does not exist in the set
90	*/
91	public void testAdd3() {
92	CopyOnWriteArraySet full = populatedSet(3);
93	full.add(three);
94	assertTrue(full.contains(three));
95	}
96
97	/**
98	* clear removes all elements from the set
99	*/
100	public void testClear() {
101	CopyOnWriteArraySet full = populatedSet(3);
102	full.clear();
103	assertEquals(0, full.size());
104	}
105
106	/**
107	* contains returns true for added elements
108	*/
109	public void testContains() {
110	CopyOnWriteArraySet full = populatedSet(3);
111	assertTrue(full.contains(one));
112	assertFalse(full.contains(five));
113	}
114
115	/**
116	* Sets with equal elements are equal
117	*/
118	public void testEquals() {
119	CopyOnWriteArraySet a = populatedSet(3);
120	CopyOnWriteArraySet b = populatedSet(3);
121	assertTrue(a.equals(b));
122	assertTrue(b.equals(a));
123	assertEquals(a.hashCode(), b.hashCode());
124	a.add(m1);
125	assertFalse(a.equals(b));
126	assertFalse(b.equals(a));
127	b.add(m1);
128	assertTrue(a.equals(b));
129	assertTrue(b.equals(a));
130	assertEquals(a.hashCode(), b.hashCode());
131	}
132
133	/**
134	* containsAll returns true for collections with subset of elements
135	*/
136	public void testContainsAll() {
137	CopyOnWriteArraySet full = populatedSet(3);
138	Vector v = new Vector();
139	v.add(one);
140	v.add(two);
141	assertTrue(full.containsAll(v));
142	v.add(six);
143	assertFalse(full.containsAll(v));
144	}
145
146	/**
147	* isEmpty is true when empty, else false
148	*/
149	public void testIsEmpty() {
150	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
151	CopyOnWriteArraySet full = populatedSet(3);
152	assertTrue(empty.isEmpty());
153	assertFalse(full.isEmpty());
154	}
155
156	/**
157	* iterator() returns an iterator containing the elements of the set
158	*/
159	public void testIterator() {
160	CopyOnWriteArraySet full = populatedSet(3);
161	Iterator i = full.iterator();
162	int j;
163	for (j = 0; i.hasNext(); j++)
164	assertEquals(j, i.next());
165	assertEquals(3, j);
166	}
167
168	/**
169	* iterator remove is unsupported
170	*/
171	public void testIteratorRemove() {
172	CopyOnWriteArraySet full = populatedSet(3);
173	Iterator it = full.iterator();
174	it.next();
175	try {
176	it.remove();
177	shouldThrow();
178	} catch (UnsupportedOperationException success) {}
179	}
180
181	/**
182	* toString holds toString of elements
183	*/
184	public void testToString() {
185	CopyOnWriteArraySet full = populatedSet(3);
186	String s = full.toString();
187	for (int i = 0; i < 3; ++i) {
188	assertTrue(s.contains(String.valueOf(i)));
189	}
190	}
191
192	/**
193	* removeAll removes all elements from the given collection
194	*/
195	public void testRemoveAll() {
196	CopyOnWriteArraySet full = populatedSet(3);
197	Vector v = new Vector();
198	v.add(one);
199	v.add(two);
200	full.removeAll(v);
201	assertEquals(1, full.size());
202	}
203
204	/**
205	* remove removes an element
206	*/
207	public void testRemove() {
208	CopyOnWriteArraySet full = populatedSet(3);
209	full.remove(one);
210	assertFalse(full.contains(one));
211	assertEquals(2, full.size());
212	}
213
214	/**
215	* size returns the number of elements
216	*/
217	public void testSize() {
218	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
219	CopyOnWriteArraySet full = populatedSet(3);
220	assertEquals(3, full.size());
221	assertEquals(0, empty.size());
222	}
223
224	/**
225	* toArray returns an Object array containing all elements from the set
226	*/
227	public void testToArray() {
228	CopyOnWriteArraySet full = populatedSet(3);
229	Object[] o = full.toArray();
230	assertEquals(3, o.length);
231	assertEquals(0, o[0]);
232	assertEquals(1, o[1]);
233	assertEquals(2, o[2]);
234	}
235
236	/**
237	* toArray returns an Integer array containing all elements from
238	* the set
239	*/
240	public void testToArray2() {
241	CopyOnWriteArraySet full = populatedSet(3);
242	Integer[] i = new Integer[3];
243	i = (Integer[])full.toArray(i);
244	assertEquals(3, i.length);
245	assertEquals(0, (int) i[0]);
246	assertEquals(1, (int) i[1]);
247	assertEquals(2, (int) i[2]);
248	}
249
250	/**
251	* toArray throws an ArrayStoreException when the given array can
252	* not store the objects inside the set
253	*/
254	public void testToArray_ArrayStoreException() {
255	try {
256	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
257	c.add("zfasdfsdf");
258	c.add("asdadasd");
259	c.toArray(new Long[5]);
260	shouldThrow();
261	} catch (ArrayStoreException success) {}
262	}
263
264	/**
265	* A deserialized serialized set is equal
266	*/
267	public void testSerialization() throws Exception {
268	CopyOnWriteArraySet q = populatedSet(SIZE);
269
270	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
271	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
272	out.writeObject(q);
273	out.close();
274
275	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
276	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
277	CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
278	assertEquals(q.size(), r.size());
279	assertTrue(q.equals(r));
280	assertTrue(r.equals(q));
281	}
282
283	}