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
#	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	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	dl	1.3	static CopyOnWriteArraySet populatedSet(int n){
22	dl	1.1	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	dl	1.4	/**
32			* Default-constructed set is empty
33			*/
34	dl	1.3	public void testConstructor() {
35			CopyOnWriteArraySet a = new CopyOnWriteArraySet();
36			assertTrue(a.isEmpty());
37			}
38
39	dl	1.4	/**
40	dl	1.5	* Collection-constructed set holds all of its elements
41	dl	1.4	*/
42	dl	1.3	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	dl	1.1	/**
53	dl	1.5	* addAll adds each element from the given collection
54	dl	1.1	*/
55	dl	1.4	public void testAddAll() {
56	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
57	dl	1.1	Vector v = new Vector();
58	dl	1.3	v.add(three);
59			v.add(four);
60			v.add(five);
61	dl	1.1	full.addAll(v);
62			assertEquals(6, full.size());
63			}
64
65			/**
66	dl	1.5	* addAll adds each element from the given collection that did not
67			* already exist in the set
68	dl	1.1	*/
69	dl	1.4	public void testAddAll2() {
70	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
71	dl	1.1	Vector v = new Vector();
72	dl	1.3	v.add(three);
73			v.add(four);
74			v.add(one); // will not add this element
75	dl	1.1	full.addAll(v);
76			assertEquals(5, full.size());
77			}
78
79			/**
80	dl	1.5	* add will not add the element if it already exists in the set
81	dl	1.1	*/
82	dl	1.4	public void testAdd2() {
83	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
84			full.add(one);
85	dl	1.1	assertEquals(3, full.size());
86			}
87
88			/**
89	dl	1.5	* add adds the element when it does not exist
90			* in the set
91	dl	1.1	*/
92	dl	1.4	public void testAdd3() {
93	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
94			full.add(three);
95			assertTrue(full.contains(three));
96	dl	1.1	}
97
98			/**
99	dl	1.5	* clear removes all elements from the set
100	dl	1.1	*/
101	dl	1.4	public void testClear() {
102	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
103	dl	1.1	full.clear();
104			assertEquals(0, full.size());
105			}
106
107			/**
108	dl	1.5	* contains returns true for added elements
109	dl	1.1	*/
110	dl	1.4	public void testContains() {
111	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
112			assertTrue(full.contains(one));
113			assertFalse(full.contains(five));
114	dl	1.1	}
115
116	dl	1.4	/**
117			* Sets with equal elements are equal
118			*/
119	dl	1.1	public void testEquals() {
120	dl	1.3	CopyOnWriteArraySet a = populatedSet(3);
121			CopyOnWriteArraySet b = populatedSet(3);
122	dl	1.1	assertTrue(a.equals(b));
123			assertTrue(b.equals(a));
124			assertEquals(a.hashCode(), b.hashCode());
125	dl	1.3	a.add(m1);
126	dl	1.1	assertFalse(a.equals(b));
127			assertFalse(b.equals(a));
128	dl	1.3	b.add(m1);
129	dl	1.1	assertTrue(a.equals(b));
130			assertTrue(b.equals(a));
131			assertEquals(a.hashCode(), b.hashCode());
132			}
133
134
135			/**
136	dl	1.5	* containsAll returns true for collections with subset of elements
137	dl	1.1	*/
138	dl	1.4	public void testContainsAll() {
139	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
140	dl	1.1	Vector v = new Vector();
141	dl	1.3	v.add(one);
142			v.add(two);
143	dl	1.1	assertTrue(full.containsAll(v));
144	dl	1.3	v.add(six);
145	dl	1.1	assertFalse(full.containsAll(v));
146			}
147
148			/**
149	dl	1.5	* isEmpty is true when empty, else false
150	dl	1.1	*/
151	dl	1.4	public void testIsEmpty() {
152	dl	1.1	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
153	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
154	dl	1.1	assertTrue(empty.isEmpty());
155			assertFalse(full.isEmpty());
156			}
157
158			/**
159	dl	1.5	* iterator() returns an iterator containing the elements of the set
160	dl	1.1	*/
161	dl	1.4	public void testIterator() {
162	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
163	dl	1.1	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	dl	1.4	/**
171			* iterator remove is unsupported
172			*/
173	dl	1.1	public void testIteratorRemove () {
174	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
175	dl	1.1	Iterator it = full.iterator();
176			it.next();
177			try {
178			it.remove();
179	dl	1.4	shouldThrow();
180	dl	1.1	}
181			catch (UnsupportedOperationException success) {}
182			}
183
184	dl	1.4	/**
185			* toString holds toString of elements
186			*/
187			public void testToString() {
188	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
189	dl	1.1	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	dl	1.5	* removeAll removes all elements from the given collection
198	dl	1.1	*/
199	dl	1.4	public void testRemoveAll() {
200	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
201	dl	1.1	Vector v = new Vector();
202	dl	1.3	v.add(one);
203			v.add(two);
204	dl	1.1	full.removeAll(v);
205			assertEquals(1, full.size());
206			}
207
208
209	dl	1.4	/**
210			* remove removes an element
211			*/
212			public void testRemove() {
213	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
214			full.remove(one);
215			assertFalse(full.contains(one));
216	dl	1.1	assertEquals(2, full.size());
217			}
218
219			/**
220	dl	1.5	* size returns the number of elements
221	dl	1.1	*/
222	dl	1.4	public void testSize() {
223	dl	1.1	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
224	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
225	dl	1.1	assertEquals(3, full.size());
226			assertEquals(0, empty.size());
227			}
228
229			/**
230	dl	1.5	* toArray returns an Object array containing all elements from the set
231	dl	1.1	*/
232	dl	1.4	public void testToArray() {
233	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
234	dl	1.1	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	dl	1.4	* toArray returns an Integer array containing all elements from
243	dl	1.5	* the set
244	dl	1.1	*/
245	dl	1.4	public void testToArray2() {
246	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
247	dl	1.1	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	dl	1.4	* toArray throws an ArrayStoreException when the given array can
258	dl	1.5	* not store the objects inside the set
259	dl	1.1	*/
260	dl	1.4	public void testToArray_ArrayStoreException() {
261			try {
262	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
263			c.add("zfasdfsdf");
264			c.add("asdadasd");
265			c.toArray(new Long[5]);
266	dl	1.4	shouldThrow();
267			} catch(ArrayStoreException e){}
268	dl	1.2	}
269
270	dl	1.4	/**
271	dl	1.5	* A deserialized seriealized set is equal
272	dl	1.4	*/
273	dl	1.2	public void testSerialization() {
274	dl	1.3	CopyOnWriteArraySet q = populatedSet(SIZE);
275	dl	1.2
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	dl	1.4	unexpectedException();
290	dl	1.2	}
291	dl	1.1	}
292
293			}