test/tck/CopyOnWriteArraySetTest.java

/*
 * Written by members of JCP JSR-166 Expert Group and released to the
 * public domain. Use, modify, and redistribute this code in any way
 * without acknowledgement. Other contributors include Andrew Wright,
 * Jeffrey Hayes, Pat Fischer, 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 list 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 correctly 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());
    }

    /**
     *   addAllAbsent adds each element from the given collection that did not
     *  already exist in the List
     */
    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());
    }

    /**
     *   addIfAbsent will not add the element if it already exists in the list
     */
    public void testAdd2() {
        CopyOnWriteArraySet full = populatedSet(3);
        full.add(one);
        assertEquals(3, full.size());
    }

    /**
     *   addIfAbsent correctly adds the element when it does not exist
     *   in the list
     */
    public void testAdd3() {
        CopyOnWriteArraySet full = populatedSet(3);
        full.add(three);
        assertTrue(full.contains(three));
    }

    /**
     *   clear correctly removes all elements from the list
     */
    public void testClear() {
        CopyOnWriteArraySet full = populatedSet(3);
        full.clear();
        assertEquals(0, full.size());
    }

    /**
     *   contains returns the correct values 
     */
    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 the correct values
     */
    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 returns the correct values
     */
    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 list 
     */
    public void testIterator() {
        CopyOnWriteArraySet full = populatedSet(3);
        Iterator i = full.iterator();
        int j;
        for(j = 0; i.hasNext(); j++)
            assertEquals(j, ((Integer)i.next()).intValue());
        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 correctly 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 correct values
     */
    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 list
     */
    public void testToArray() {
        CopyOnWriteArraySet full = populatedSet(3);
        Object[] o = full.toArray();
        assertEquals(3, o.length);
        assertEquals(0, ((Integer)o[0]).intValue());
        assertEquals(1, ((Integer)o[1]).intValue());
        assertEquals(2, ((Integer)o[2]).intValue());
    }

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


    /**
     *  toArray throws an ArrayStoreException when the given array can
     *  not store the objects inside the list
     */
    public void testToArray_ArrayStoreException() {
        try {
            CopyOnWriteArraySet c = new CopyOnWriteArraySet();
            c.add("zfasdfsdf");
            c.add("asdadasd");
            c.toArray(new Long[5]);
            shouldThrow();
        } catch(ArrayStoreException e){}
    }

    /**
     *
     */
    public void testSerialization() {
        CopyOnWriteArraySet q = populatedSet(SIZE);

        try {
            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));
        } catch(Exception e){
            unexpectedException();
        }
    }

}
Revision:	1.4
Committed:	Sat Sep 20 18:20:07 2003 UTC (20 years, 8 months ago) by dl
Branch:	MAIN
Changes since 1.3:	+48 -29 lines
Log Message:	Documentation scaffolding
#	Content
1	/*
2	* Written by members of JCP JSR-166 Expert Group and released to the
3	* public domain. Use, modify, and redistribute this code in any way
4	* without acknowledgement. Other contributors include Andrew Wright,
5	* Jeffrey Hayes, Pat Fischer, Mike Judd.
6	*/
7
8	import junit.framework.*;
9	import java.util.*;
10	import java.util.concurrent.*;
11	import java.io.*;
12
13	public class CopyOnWriteArraySetTest extends JSR166TestCase {
14
15	public static void main(String[] args) {
16	junit.textui.TestRunner.run (suite());
17	}
18
19	public static Test suite() {
20	return new TestSuite(CopyOnWriteArraySetTest.class);
21	}
22
23	static CopyOnWriteArraySet populatedSet(int n){
24	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
25	assertTrue(a.isEmpty());
26	for (int i = 0; i < n; ++i)
27	a.add(new Integer(i));
28	assertFalse(a.isEmpty());
29	assertEquals(n, a.size());
30	return a;
31	}
32
33	/**
34	* Default-constructed set is empty
35	*/
36	public void testConstructor() {
37	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
38	assertTrue(a.isEmpty());
39	}
40
41	/**
42	* Collection-constructed list holds all of its elements
43	*/
44	public void testConstructor3() {
45	Integer[] ints = new Integer[SIZE];
46	for (int i = 0; i < SIZE-1; ++i)
47	ints[i] = new Integer(i);
48	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
49	for (int i = 0; i < SIZE; ++i)
50	assertTrue(a.contains(ints[i]));
51	}
52
53
54	/**
55	* addAll correctly adds each element from the given collection
56	*/
57	public void testAddAll() {
58	CopyOnWriteArraySet full = populatedSet(3);
59	Vector v = new Vector();
60	v.add(three);
61	v.add(four);
62	v.add(five);
63	full.addAll(v);
64	assertEquals(6, full.size());
65	}
66
67	/**
68	* addAllAbsent adds each element from the given collection that did not
69	* already exist in the List
70	*/
71	public void testAddAll2() {
72	CopyOnWriteArraySet full = populatedSet(3);
73	Vector v = new Vector();
74	v.add(three);
75	v.add(four);
76	v.add(one); // will not add this element
77	full.addAll(v);
78	assertEquals(5, full.size());
79	}
80
81	/**
82	* addIfAbsent will not add the element if it already exists in the list
83	*/
84	public void testAdd2() {
85	CopyOnWriteArraySet full = populatedSet(3);
86	full.add(one);
87	assertEquals(3, full.size());
88	}
89
90	/**
91	* addIfAbsent correctly adds the element when it does not exist
92	* in the list
93	*/
94	public void testAdd3() {
95	CopyOnWriteArraySet full = populatedSet(3);
96	full.add(three);
97	assertTrue(full.contains(three));
98	}
99
100	/**
101	* clear correctly removes all elements from the list
102	*/
103	public void testClear() {
104	CopyOnWriteArraySet full = populatedSet(3);
105	full.clear();
106	assertEquals(0, full.size());
107	}
108
109	/**
110	* contains returns the correct values
111	*/
112	public void testContains() {
113	CopyOnWriteArraySet full = populatedSet(3);
114	assertTrue(full.contains(one));
115	assertFalse(full.contains(five));
116	}
117
118	/**
119	* Sets with equal elements are equal
120	*/
121	public void testEquals() {
122	CopyOnWriteArraySet a = populatedSet(3);
123	CopyOnWriteArraySet b = populatedSet(3);
124	assertTrue(a.equals(b));
125	assertTrue(b.equals(a));
126	assertEquals(a.hashCode(), b.hashCode());
127	a.add(m1);
128	assertFalse(a.equals(b));
129	assertFalse(b.equals(a));
130	b.add(m1);
131	assertTrue(a.equals(b));
132	assertTrue(b.equals(a));
133	assertEquals(a.hashCode(), b.hashCode());
134	}
135
136
137	/**
138	* containsAll returns the correct values
139	*/
140	public void testContainsAll() {
141	CopyOnWriteArraySet full = populatedSet(3);
142	Vector v = new Vector();
143	v.add(one);
144	v.add(two);
145	assertTrue(full.containsAll(v));
146	v.add(six);
147	assertFalse(full.containsAll(v));
148	}
149
150	/**
151	* isEmpty returns the correct values
152	*/
153	public void testIsEmpty() {
154	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
155	CopyOnWriteArraySet full = populatedSet(3);
156	assertTrue(empty.isEmpty());
157	assertFalse(full.isEmpty());
158	}
159
160	/**
161	* iterator() returns an iterator containing the elements of the list
162	*/
163	public void testIterator() {
164	CopyOnWriteArraySet full = populatedSet(3);
165	Iterator i = full.iterator();
166	int j;
167	for(j = 0; i.hasNext(); j++)
168	assertEquals(j, ((Integer)i.next()).intValue());
169	assertEquals(3, j);
170	}
171
172	/**
173	* iterator remove is unsupported
174	*/
175	public void testIteratorRemove () {
176	CopyOnWriteArraySet full = populatedSet(3);
177	Iterator it = full.iterator();
178	it.next();
179	try {
180	it.remove();
181	shouldThrow();
182	}
183	catch (UnsupportedOperationException success) {}
184	}
185
186	/**
187	* toString holds toString of elements
188	*/
189	public void testToString() {
190	CopyOnWriteArraySet full = populatedSet(3);
191	String s = full.toString();
192	for (int i = 0; i < 3; ++i) {
193	assertTrue(s.indexOf(String.valueOf(i)) >= 0);
194	}
195	}
196
197
198	/**
199	* removeAll correctly removes all elements from the given collection
200	*/
201	public void testRemoveAll() {
202	CopyOnWriteArraySet full = populatedSet(3);
203	Vector v = new Vector();
204	v.add(one);
205	v.add(two);
206	full.removeAll(v);
207	assertEquals(1, full.size());
208	}
209
210
211	/**
212	* remove removes an element
213	*/
214	public void testRemove() {
215	CopyOnWriteArraySet full = populatedSet(3);
216	full.remove(one);
217	assertFalse(full.contains(one));
218	assertEquals(2, full.size());
219	}
220
221	/**
222	* size returns the correct values
223	*/
224	public void testSize() {
225	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
226	CopyOnWriteArraySet full = populatedSet(3);
227	assertEquals(3, full.size());
228	assertEquals(0, empty.size());
229	}
230
231	/**
232	* toArray returns an Object array containing all elements from the list
233	*/
234	public void testToArray() {
235	CopyOnWriteArraySet full = populatedSet(3);
236	Object[] o = full.toArray();
237	assertEquals(3, o.length);
238	assertEquals(0, ((Integer)o[0]).intValue());
239	assertEquals(1, ((Integer)o[1]).intValue());
240	assertEquals(2, ((Integer)o[2]).intValue());
241	}
242
243	/**
244	* toArray returns an Integer array containing all elements from
245	* the list
246	*/
247	public void testToArray2() {
248	CopyOnWriteArraySet full = populatedSet(3);
249	Integer[] i = new Integer[3];
250	i = (Integer[])full.toArray(i);
251	assertEquals(3, i.length);
252	assertEquals(0, i[0].intValue());
253	assertEquals(1, i[1].intValue());
254	assertEquals(2, i[2].intValue());
255	}
256
257
258	/**
259	* toArray throws an ArrayStoreException when the given array can
260	* not store the objects inside the list
261	*/
262	public void testToArray_ArrayStoreException() {
263	try {
264	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
265	c.add("zfasdfsdf");
266	c.add("asdadasd");
267	c.toArray(new Long[5]);
268	shouldThrow();
269	} catch(ArrayStoreException e){}
270	}
271
272	/**
273	*
274	*/
275	public void testSerialization() {
276	CopyOnWriteArraySet q = populatedSet(SIZE);
277
278	try {
279	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
280	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
281	out.writeObject(q);
282	out.close();
283
284	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
285	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
286	CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
287	assertEquals(q.size(), r.size());
288	assertTrue(q.equals(r));
289	assertTrue(r.equals(q));
290	} catch(Exception e){
291	unexpectedException();
292	}
293	}
294
295	}