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/licenses/publicdomain
 * 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:	1.14
Committed:	Sun Nov 22 18:57:17 2009 UTC (14 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.13:	+7 -7 lines
Log Message:	use autoboxing judiciously for readability
#	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/licenses/publicdomain
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
91	* in the set
92	*/
93	public void testAdd3() {
94	CopyOnWriteArraySet full = populatedSet(3);
95	full.add(three);
96	assertTrue(full.contains(three));
97	}
98
99	/**
100	* clear removes all elements from the set
101	*/
102	public void testClear() {
103	CopyOnWriteArraySet full = populatedSet(3);
104	full.clear();
105	assertEquals(0, full.size());
106	}
107
108	/**
109	* contains returns true for added elements
110	*/
111	public void testContains() {
112	CopyOnWriteArraySet full = populatedSet(3);
113	assertTrue(full.contains(one));
114	assertFalse(full.contains(five));
115	}
116
117	/**
118	* Sets with equal elements are equal
119	*/
120	public void testEquals() {
121	CopyOnWriteArraySet a = populatedSet(3);
122	CopyOnWriteArraySet b = populatedSet(3);
123	assertTrue(a.equals(b));
124	assertTrue(b.equals(a));
125	assertEquals(a.hashCode(), b.hashCode());
126	a.add(m1);
127	assertFalse(a.equals(b));
128	assertFalse(b.equals(a));
129	b.add(m1);
130	assertTrue(a.equals(b));
131	assertTrue(b.equals(a));
132	assertEquals(a.hashCode(), b.hashCode());
133	}
134
135
136	/**
137	* containsAll returns true for collections with subset of elements
138	*/
139	public void testContainsAll() {
140	CopyOnWriteArraySet full = populatedSet(3);
141	Vector v = new Vector();
142	v.add(one);
143	v.add(two);
144	assertTrue(full.containsAll(v));
145	v.add(six);
146	assertFalse(full.containsAll(v));
147	}
148
149	/**
150	* isEmpty is true when empty, else false
151	*/
152	public void testIsEmpty() {
153	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
154	CopyOnWriteArraySet full = populatedSet(3);
155	assertTrue(empty.isEmpty());
156	assertFalse(full.isEmpty());
157	}
158
159	/**
160	* iterator() returns an iterator containing the elements of the set
161	*/
162	public void testIterator() {
163	CopyOnWriteArraySet full = populatedSet(3);
164	Iterator i = full.iterator();
165	int j;
166	for (j = 0; i.hasNext(); j++)
167	assertEquals(j, i.next());
168	assertEquals(3, j);
169	}
170
171	/**
172	* iterator remove is unsupported
173	*/
174	public void testIteratorRemove () {
175	CopyOnWriteArraySet full = populatedSet(3);
176	Iterator it = full.iterator();
177	it.next();
178	try {
179	it.remove();
180	shouldThrow();
181	} catch (UnsupportedOperationException success) {}
182	}
183
184	/**
185	* toString holds toString of elements
186	*/
187	public void testToString() {
188	CopyOnWriteArraySet full = populatedSet(3);
189	String s = full.toString();
190	for (int i = 0; i < 3; ++i) {
191	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
192	}
193	}
194
195
196	/**
197	* removeAll removes all elements from the given collection
198	*/
199	public void testRemoveAll() {
200	CopyOnWriteArraySet full = populatedSet(3);
201	Vector v = new Vector();
202	v.add(one);
203	v.add(two);
204	full.removeAll(v);
205	assertEquals(1, full.size());
206	}
207
208
209	/**
210	* remove removes an element
211	*/
212	public void testRemove() {
213	CopyOnWriteArraySet full = populatedSet(3);
214	full.remove(one);
215	assertFalse(full.contains(one));
216	assertEquals(2, full.size());
217	}
218
219	/**
220	* size returns the number of elements
221	*/
222	public void testSize() {
223	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
224	CopyOnWriteArraySet full = populatedSet(3);
225	assertEquals(3, full.size());
226	assertEquals(0, empty.size());
227	}
228
229	/**
230	* toArray returns an Object array containing all elements from the set
231	*/
232	public void testToArray() {
233	CopyOnWriteArraySet full = populatedSet(3);
234	Object[] o = full.toArray();
235	assertEquals(3, o.length);
236	assertEquals(0, o[0]);
237	assertEquals(1, o[1]);
238	assertEquals(2, o[2]);
239	}
240
241	/**
242	* toArray returns an Integer array containing all elements from
243	* the set
244	*/
245	public void testToArray2() {
246	CopyOnWriteArraySet full = populatedSet(3);
247	Integer[] i = new Integer[3];
248	i = (Integer[])full.toArray(i);
249	assertEquals(3, i.length);
250	assertEquals(0, (int) i[0]);
251	assertEquals(1, (int) i[1]);
252	assertEquals(2, (int) i[2]);
253	}
254
255
256	/**
257	* toArray throws an ArrayStoreException when the given array can
258	* not store the objects inside the set
259	*/
260	public void testToArray_ArrayStoreException() {
261	try {
262	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
263	c.add("zfasdfsdf");
264	c.add("asdadasd");
265	c.toArray(new Long[5]);
266	shouldThrow();
267	} catch (ArrayStoreException success) {}
268	}
269
270	/**
271	* A deserialized serialized set is equal
272	*/
273	public void testSerialization() throws Exception {
274	CopyOnWriteArraySet q = populatedSet(SIZE);
275
276	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
277	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
278	out.writeObject(q);
279	out.close();
280
281	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
282	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
283	CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
284	assertEquals(q.size(), r.size());
285	assertTrue(q.equals(r));
286	assertTrue(r.equals(q));
287	}
288
289	}