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
#	User	Rev	Content
1	dl	1.1	/*
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	dl	1.2	import java.io.*;
12	dl	1.1
13	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
14	dl	1.1
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	dl	1.3	static CopyOnWriteArraySet populatedSet(int n){
24	dl	1.1	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	dl	1.4	/**
34			* Default-constructed set is empty
35			*/
36	dl	1.3	public void testConstructor() {
37			CopyOnWriteArraySet a = new CopyOnWriteArraySet();
38			assertTrue(a.isEmpty());
39			}
40
41	dl	1.4	/**
42			* Collection-constructed list holds all of its elements
43			*/
44	dl	1.3	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	dl	1.1	/**
55	dl	1.3	* addAll correctly adds each element from the given collection
56	dl	1.1	*/
57	dl	1.4	public void testAddAll() {
58	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
59	dl	1.1	Vector v = new Vector();
60	dl	1.3	v.add(three);
61			v.add(four);
62			v.add(five);
63	dl	1.1	full.addAll(v);
64			assertEquals(6, full.size());
65			}
66
67			/**
68	dl	1.3	* addAllAbsent adds each element from the given collection that did not
69	dl	1.1	* already exist in the List
70			*/
71	dl	1.4	public void testAddAll2() {
72	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
73	dl	1.1	Vector v = new Vector();
74	dl	1.3	v.add(three);
75			v.add(four);
76			v.add(one); // will not add this element
77	dl	1.1	full.addAll(v);
78			assertEquals(5, full.size());
79			}
80
81			/**
82	dl	1.3	* addIfAbsent will not add the element if it already exists in the list
83	dl	1.1	*/
84	dl	1.4	public void testAdd2() {
85	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
86			full.add(one);
87	dl	1.1	assertEquals(3, full.size());
88			}
89
90			/**
91	dl	1.4	* addIfAbsent correctly adds the element when it does not exist
92			* in the list
93	dl	1.1	*/
94	dl	1.4	public void testAdd3() {
95	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
96			full.add(three);
97			assertTrue(full.contains(three));
98	dl	1.1	}
99
100			/**
101	dl	1.3	* clear correctly removes all elements from the list
102	dl	1.1	*/
103	dl	1.4	public void testClear() {
104	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
105	dl	1.1	full.clear();
106			assertEquals(0, full.size());
107			}
108
109			/**
110	dl	1.3	* contains returns the correct values
111	dl	1.1	*/
112	dl	1.4	public void testContains() {
113	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
114			assertTrue(full.contains(one));
115			assertFalse(full.contains(five));
116	dl	1.1	}
117
118	dl	1.4	/**
119			* Sets with equal elements are equal
120			*/
121	dl	1.1	public void testEquals() {
122	dl	1.3	CopyOnWriteArraySet a = populatedSet(3);
123			CopyOnWriteArraySet b = populatedSet(3);
124	dl	1.1	assertTrue(a.equals(b));
125			assertTrue(b.equals(a));
126			assertEquals(a.hashCode(), b.hashCode());
127	dl	1.3	a.add(m1);
128	dl	1.1	assertFalse(a.equals(b));
129			assertFalse(b.equals(a));
130	dl	1.3	b.add(m1);
131	dl	1.1	assertTrue(a.equals(b));
132			assertTrue(b.equals(a));
133			assertEquals(a.hashCode(), b.hashCode());
134			}
135
136
137			/**
138	dl	1.3	* containsAll returns the correct values
139	dl	1.1	*/
140	dl	1.4	public void testContainsAll() {
141	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
142	dl	1.1	Vector v = new Vector();
143	dl	1.3	v.add(one);
144			v.add(two);
145	dl	1.1	assertTrue(full.containsAll(v));
146	dl	1.3	v.add(six);
147	dl	1.1	assertFalse(full.containsAll(v));
148			}
149
150			/**
151	dl	1.3	* isEmpty returns the correct values
152	dl	1.1	*/
153	dl	1.4	public void testIsEmpty() {
154	dl	1.1	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
155	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
156	dl	1.1	assertTrue(empty.isEmpty());
157			assertFalse(full.isEmpty());
158			}
159
160			/**
161	dl	1.3	* iterator() returns an iterator containing the elements of the list
162	dl	1.1	*/
163	dl	1.4	public void testIterator() {
164	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
165	dl	1.1	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	dl	1.4	/**
173			* iterator remove is unsupported
174			*/
175	dl	1.1	public void testIteratorRemove () {
176	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
177	dl	1.1	Iterator it = full.iterator();
178			it.next();
179			try {
180			it.remove();
181	dl	1.4	shouldThrow();
182	dl	1.1	}
183			catch (UnsupportedOperationException success) {}
184			}
185
186	dl	1.4	/**
187			* toString holds toString of elements
188			*/
189			public void testToString() {
190	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
191	dl	1.1	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	dl	1.3	* removeAll correctly removes all elements from the given collection
200	dl	1.1	*/
201	dl	1.4	public void testRemoveAll() {
202	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
203	dl	1.1	Vector v = new Vector();
204	dl	1.3	v.add(one);
205			v.add(two);
206	dl	1.1	full.removeAll(v);
207			assertEquals(1, full.size());
208			}
209
210
211	dl	1.4	/**
212			* remove removes an element
213			*/
214			public void testRemove() {
215	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
216			full.remove(one);
217			assertFalse(full.contains(one));
218	dl	1.1	assertEquals(2, full.size());
219			}
220
221			/**
222	dl	1.3	* size returns the correct values
223	dl	1.1	*/
224	dl	1.4	public void testSize() {
225	dl	1.1	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
226	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
227	dl	1.1	assertEquals(3, full.size());
228			assertEquals(0, empty.size());
229			}
230
231			/**
232	dl	1.3	* toArray returns an Object array containing all elements from the list
233	dl	1.1	*/
234	dl	1.4	public void testToArray() {
235	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
236	dl	1.1	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	dl	1.4	* toArray returns an Integer array containing all elements from
245			* the list
246	dl	1.1	*/
247	dl	1.4	public void testToArray2() {
248	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
249	dl	1.1	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	dl	1.4	* toArray throws an ArrayStoreException when the given array can
260			* not store the objects inside the list
261	dl	1.1	*/
262	dl	1.4	public void testToArray_ArrayStoreException() {
263			try {
264	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
265			c.add("zfasdfsdf");
266			c.add("asdadasd");
267			c.toArray(new Long[5]);
268	dl	1.4	shouldThrow();
269			} catch(ArrayStoreException e){}
270	dl	1.2	}
271
272	dl	1.4	/**
273			*
274			*/
275	dl	1.2	public void testSerialization() {
276	dl	1.3	CopyOnWriteArraySet q = populatedSet(SIZE);
277	dl	1.2
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	dl	1.4	unexpectedException();
292	dl	1.2	}
293	dl	1.1	}
294
295			}