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 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, ((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  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, ((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 set
     */
    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 set
     */
    public void testToArray_ArrayStoreException() {
        try {
            CopyOnWriteArraySet c = new CopyOnWriteArraySet();
            c.add("zfasdfsdf");
            c.add("asdadasd");
            c.toArray(new Long[5]);
            shouldThrow();
        } catch(ArrayStoreException e){}
    }

    /**
     * A deserialized seriealized set is equal
     */
    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:	1.5
Committed:	Thu Sep 25 11:02:41 2003 UTC (20 years, 7 months ago) by dl
Branch:	MAIN
CVS Tags:	JSR166_NOV3_FREEZE, JSR166_DEC9_PRE_ES_SUBMIT, JSR166_DEC9_POST_ES_SUBMIT
Changes since 1.4:	+18 -20 lines
Log Message:	improve tck javadocs; rename and add a few tests
#	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	public static void main(String[] args) {
15	junit.textui.TestRunner.run (suite());
16	}
17	public static Test suite() {
18	return new TestSuite(CopyOnWriteArraySetTest.class);
19	}
20
21	static CopyOnWriteArraySet populatedSet(int n){
22	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
23	assertTrue(a.isEmpty());
24	for (int i = 0; i < n; ++i)
25	a.add(new Integer(i));
26	assertFalse(a.isEmpty());
27	assertEquals(n, a.size());
28	return a;
29	}
30
31	/**
32	* Default-constructed set is empty
33	*/
34	public void testConstructor() {
35	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
36	assertTrue(a.isEmpty());
37	}
38
39	/**
40	* Collection-constructed set holds all of its elements
41	*/
42	public void testConstructor3() {
43	Integer[] ints = new Integer[SIZE];
44	for (int i = 0; i < SIZE-1; ++i)
45	ints[i] = new Integer(i);
46	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
47	for (int i = 0; i < SIZE; ++i)
48	assertTrue(a.contains(ints[i]));
49	}
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
90	* 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, ((Integer)i.next()).intValue());
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	}
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, ((Integer)o[0]).intValue());
237	assertEquals(1, ((Integer)o[1]).intValue());
238	assertEquals(2, ((Integer)o[2]).intValue());
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, i[0].intValue());
251	assertEquals(1, i[1].intValue());
252	assertEquals(2, i[2].intValue());
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 e){}
268	}
269
270	/**
271	* A deserialized seriealized set is equal
272	*/
273	public void testSerialization() {
274	CopyOnWriteArraySet q = populatedSet(SIZE);
275
276	try {
277	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
278	ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
279	out.writeObject(q);
280	out.close();
281
282	ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
283	ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
284	CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
285	assertEquals(q.size(), r.size());
286	assertTrue(q.equals(r));
287	assertTrue(r.equals(q));
288	} catch(Exception e){
289	unexpectedException();
290	}
291	}
292
293	}