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, ((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 serialized 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:	1.9
Committed:	Mon Nov 16 04:57:10 2009 UTC (14 years, 6 months ago) by jsr166
Branch:	MAIN
Changes since 1.8:	+3 -3 lines
Log Message:	whitespace
#	User	Rev	Content
1	dl	1.1	/*
2	dl	1.6	* 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	jsr166	1.8	* Other contributors include Andrew Wright, Jeffrey Hayes,
6			* Pat Fisher, Mike Judd.
7	dl	1.1	*/
8
9			import junit.framework.*;
10			import java.util.*;
11			import java.util.concurrent.*;
12	dl	1.2	import java.io.*;
13	dl	1.1
14	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
15	dl	1.1	public static void main(String[] args) {
16	jsr166	1.8	junit.textui.TestRunner.run (suite());
17	dl	1.1	}
18			public static Test suite() {
19			return new TestSuite(CopyOnWriteArraySetTest.class);
20			}
21
22	dl	1.3	static CopyOnWriteArraySet populatedSet(int n){
23	dl	1.1	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
24			assertTrue(a.isEmpty());
25	jsr166	1.8	for (int i = 0; i < n; ++i)
26	dl	1.1	a.add(new Integer(i));
27			assertFalse(a.isEmpty());
28			assertEquals(n, a.size());
29			return a;
30			}
31
32	dl	1.4	/**
33			* Default-constructed set is empty
34			*/
35	dl	1.3	public void testConstructor() {
36			CopyOnWriteArraySet a = new CopyOnWriteArraySet();
37			assertTrue(a.isEmpty());
38			}
39
40	dl	1.4	/**
41	dl	1.5	* Collection-constructed set holds all of its elements
42	dl	1.4	*/
43	dl	1.3	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	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
49	dl	1.3	assertTrue(a.contains(ints[i]));
50			}
51	jsr166	1.8
52	dl	1.3
53	dl	1.1	/**
54	dl	1.5	* addAll adds each element from the given collection
55	dl	1.1	*/
56	dl	1.4	public void testAddAll() {
57	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
58	dl	1.1	Vector v = new Vector();
59	dl	1.3	v.add(three);
60			v.add(four);
61			v.add(five);
62	dl	1.1	full.addAll(v);
63			assertEquals(6, full.size());
64			}
65
66			/**
67	dl	1.5	* addAll adds each element from the given collection that did not
68			* already exist in the set
69	dl	1.1	*/
70	dl	1.4	public void testAddAll2() {
71	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
72	dl	1.1	Vector v = new Vector();
73	dl	1.3	v.add(three);
74			v.add(four);
75			v.add(one); // will not add this element
76	dl	1.1	full.addAll(v);
77			assertEquals(5, full.size());
78			}
79
80			/**
81	dl	1.5	* add will not add the element if it already exists in the set
82	dl	1.1	*/
83	dl	1.4	public void testAdd2() {
84	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
85			full.add(one);
86	dl	1.1	assertEquals(3, full.size());
87			}
88
89			/**
90	dl	1.5	* add adds the element when it does not exist
91			* in the set
92	dl	1.1	*/
93	dl	1.4	public void testAdd3() {
94	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
95			full.add(three);
96			assertTrue(full.contains(three));
97	dl	1.1	}
98
99			/**
100	dl	1.5	* clear removes all elements from the set
101	dl	1.1	*/
102	dl	1.4	public void testClear() {
103	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
104	dl	1.1	full.clear();
105			assertEquals(0, full.size());
106			}
107
108			/**
109	dl	1.5	* contains returns true for added elements
110	dl	1.1	*/
111	dl	1.4	public void testContains() {
112	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
113			assertTrue(full.contains(one));
114			assertFalse(full.contains(five));
115	dl	1.1	}
116
117	dl	1.4	/**
118			* Sets with equal elements are equal
119			*/
120	dl	1.1	public void testEquals() {
121	dl	1.3	CopyOnWriteArraySet a = populatedSet(3);
122			CopyOnWriteArraySet b = populatedSet(3);
123	dl	1.1	assertTrue(a.equals(b));
124			assertTrue(b.equals(a));
125			assertEquals(a.hashCode(), b.hashCode());
126	dl	1.3	a.add(m1);
127	dl	1.1	assertFalse(a.equals(b));
128			assertFalse(b.equals(a));
129	dl	1.3	b.add(m1);
130	dl	1.1	assertTrue(a.equals(b));
131			assertTrue(b.equals(a));
132			assertEquals(a.hashCode(), b.hashCode());
133			}
134
135	jsr166	1.8
136	dl	1.1	/**
137	dl	1.5	* containsAll returns true for collections with subset of elements
138	dl	1.1	*/
139	dl	1.4	public void testContainsAll() {
140	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
141	dl	1.1	Vector v = new Vector();
142	dl	1.3	v.add(one);
143			v.add(two);
144	dl	1.1	assertTrue(full.containsAll(v));
145	dl	1.3	v.add(six);
146	dl	1.1	assertFalse(full.containsAll(v));
147			}
148
149			/**
150	dl	1.5	* isEmpty is true when empty, else false
151	dl	1.1	*/
152	dl	1.4	public void testIsEmpty() {
153	dl	1.1	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
154	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
155	dl	1.1	assertTrue(empty.isEmpty());
156			assertFalse(full.isEmpty());
157			}
158
159			/**
160	jsr166	1.8	* iterator() returns an iterator containing the elements of the set
161	dl	1.1	*/
162	dl	1.4	public void testIterator() {
163	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
164	dl	1.1	Iterator i = full.iterator();
165			int j;
166	jsr166	1.9	for (j = 0; i.hasNext(); j++)
167	dl	1.1	assertEquals(j, ((Integer)i.next()).intValue());
168			assertEquals(3, j);
169			}
170
171	dl	1.4	/**
172			* iterator remove is unsupported
173			*/
174	dl	1.1	public void testIteratorRemove () {
175	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
176	dl	1.1	Iterator it = full.iterator();
177			it.next();
178			try {
179			it.remove();
180	dl	1.4	shouldThrow();
181	dl	1.1	}
182			catch (UnsupportedOperationException success) {}
183			}
184
185	dl	1.4	/**
186			* toString holds toString of elements
187			*/
188			public void testToString() {
189	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
190	dl	1.1	String s = full.toString();
191			for (int i = 0; i < 3; ++i) {
192			assertTrue(s.indexOf(String.valueOf(i)) >= 0);
193			}
194	jsr166	1.8	}
195	dl	1.1
196
197			/**
198	dl	1.5	* removeAll removes all elements from the given collection
199	dl	1.1	*/
200	dl	1.4	public void testRemoveAll() {
201	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
202	dl	1.1	Vector v = new Vector();
203	dl	1.3	v.add(one);
204			v.add(two);
205	dl	1.1	full.removeAll(v);
206			assertEquals(1, full.size());
207			}
208
209
210	dl	1.4	/**
211			* remove removes an element
212			*/
213			public void testRemove() {
214	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
215			full.remove(one);
216			assertFalse(full.contains(one));
217	dl	1.1	assertEquals(2, full.size());
218			}
219
220			/**
221	dl	1.5	* size returns the number of elements
222	dl	1.1	*/
223	dl	1.4	public void testSize() {
224	dl	1.1	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
225	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
226	dl	1.1	assertEquals(3, full.size());
227			assertEquals(0, empty.size());
228			}
229
230			/**
231	dl	1.5	* toArray returns an Object array containing all elements from the set
232	dl	1.1	*/
233	dl	1.4	public void testToArray() {
234	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
235	dl	1.1	Object[] o = full.toArray();
236			assertEquals(3, o.length);
237			assertEquals(0, ((Integer)o[0]).intValue());
238			assertEquals(1, ((Integer)o[1]).intValue());
239			assertEquals(2, ((Integer)o[2]).intValue());
240			}
241
242			/**
243	dl	1.4	* toArray returns an Integer array containing all elements from
244	dl	1.5	* the set
245	dl	1.1	*/
246	dl	1.4	public void testToArray2() {
247	dl	1.3	CopyOnWriteArraySet full = populatedSet(3);
248	dl	1.1	Integer[] i = new Integer[3];
249			i = (Integer[])full.toArray(i);
250			assertEquals(3, i.length);
251			assertEquals(0, i[0].intValue());
252			assertEquals(1, i[1].intValue());
253			assertEquals(2, i[2].intValue());
254			}
255
256
257			/**
258	dl	1.4	* toArray throws an ArrayStoreException when the given array can
259	dl	1.5	* not store the objects inside the set
260	dl	1.1	*/
261	dl	1.4	public void testToArray_ArrayStoreException() {
262			try {
263	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
264			c.add("zfasdfsdf");
265			c.add("asdadasd");
266			c.toArray(new Long[5]);
267	dl	1.4	shouldThrow();
268	jsr166	1.9	} catch (ArrayStoreException e){}
269	dl	1.2	}
270
271	dl	1.4	/**
272	dl	1.7	* A deserialized serialized set is equal
273	dl	1.4	*/
274	dl	1.2	public void testSerialization() {
275	dl	1.3	CopyOnWriteArraySet q = populatedSet(SIZE);
276	dl	1.2
277			try {
278			ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
279			ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
280			out.writeObject(q);
281			out.close();
282
283			ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
284			ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
285			CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
286			assertEquals(q.size(), r.size());
287			assertTrue(q.equals(r));
288			assertTrue(r.equals(q));
289	jsr166	1.9	} catch (Exception e){
290	dl	1.4	unexpectedException();
291	dl	1.2	}
292	dl	1.1	}
293
294			}