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/publicdomain/zero/1.0/
 * 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, i.next());
        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, o[0]);
        assertEquals(1, o[1]);
        assertEquals(2, o[2]);
    }

    /**
     * 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, (int) i[0]);
        assertEquals(1, (int) i[1]);
        assertEquals(2, (int) i[2]);
    }


    /**
     * 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 success) {}
    }

    /**
     * A deserialized serialized set is equal
     */
    public void testSerialization() throws Exception {
        CopyOnWriteArraySet q = populatedSet(SIZE);

        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));
    }

}
Revision:	1.17
Committed:	Tue Mar 15 19:47:06 2011 UTC (13 years, 2 months ago) by jsr166
Branch:	MAIN
CVS Tags:	release-1_7_0
Changes since 1.16:	+1 -1 lines
Log Message:	Update Creative Commons license URL in legal notices
#	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	jsr166	1.17	* http://creativecommons.org/publicdomain/zero/1.0/
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	1.15	junit.textui.TestRunner.run(suite());
17	dl	1.1	}
18			public static Test suite() {
19	jsr166	1.11	return new TestSuite(CopyOnWriteArraySetTest.class);
20	dl	1.1	}
21
22	jsr166	1.10	static CopyOnWriteArraySet populatedSet(int n) {
23	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
24	dl	1.1	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	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
37	dl	1.3	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	jsr166	1.11	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	jsr166	1.16	* addAll adds each element from the given collection
55	dl	1.1	*/
56	dl	1.4	public void testAddAll() {
57	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
58			Vector v = new Vector();
59			v.add(three);
60			v.add(four);
61			v.add(five);
62			full.addAll(v);
63			assertEquals(6, full.size());
64	dl	1.1	}
65
66			/**
67	jsr166	1.16	* 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	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
72			Vector v = new Vector();
73			v.add(three);
74			v.add(four);
75			v.add(one); // will not add this element
76			full.addAll(v);
77			assertEquals(5, full.size());
78	dl	1.1	}
79
80			/**
81	jsr166	1.16	* 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	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
85			full.add(one);
86			assertEquals(3, full.size());
87	dl	1.1	}
88
89			/**
90	jsr166	1.16	* add adds the element when it does not exist in the set
91	dl	1.1	*/
92	dl	1.4	public void testAdd3() {
93	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
94	dl	1.3	full.add(three);
95			assertTrue(full.contains(three));
96	dl	1.1	}
97
98			/**
99	jsr166	1.16	* clear removes all elements from the set
100	dl	1.1	*/
101	dl	1.4	public void testClear() {
102	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
103			full.clear();
104			assertEquals(0, full.size());
105	dl	1.1	}
106
107			/**
108	jsr166	1.16	* contains returns true for added elements
109	dl	1.1	*/
110	dl	1.4	public void testContains() {
111	jsr166	1.11	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	jsr166	1.11	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	jsr166	1.8
135	dl	1.1	/**
136	jsr166	1.16	* containsAll returns true for collections with subset of elements
137	dl	1.1	*/
138	dl	1.4	public void testContainsAll() {
139	jsr166	1.11	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	dl	1.1	}
147
148			/**
149	jsr166	1.16	* isEmpty is true when empty, else false
150	dl	1.1	*/
151	dl	1.4	public void testIsEmpty() {
152	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
153			CopyOnWriteArraySet full = populatedSet(3);
154			assertTrue(empty.isEmpty());
155			assertFalse(full.isEmpty());
156	dl	1.1	}
157
158			/**
159	jsr166	1.16	* iterator() returns an iterator containing the elements of the set
160	dl	1.1	*/
161	dl	1.4	public void testIterator() {
162	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
163			Iterator i = full.iterator();
164			int j;
165			for (j = 0; i.hasNext(); j++)
166	jsr166	1.14	assertEquals(j, i.next());
167	jsr166	1.11	assertEquals(3, j);
168	dl	1.1	}
169
170	dl	1.4	/**
171			* iterator remove is unsupported
172			*/
173	jsr166	1.15	public void testIteratorRemove() {
174	jsr166	1.11	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	jsr166	1.12	} catch (UnsupportedOperationException success) {}
181	dl	1.1	}
182
183	dl	1.4	/**
184			* toString holds toString of elements
185			*/
186			public void testToString() {
187	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
188	dl	1.1	String s = full.toString();
189			for (int i = 0; i < 3; ++i) {
190			assertTrue(s.indexOf(String.valueOf(i)) >= 0);
191			}
192	jsr166	1.8	}
193	dl	1.1
194
195			/**
196	jsr166	1.16	* removeAll removes all elements from the given collection
197	dl	1.1	*/
198	dl	1.4	public void testRemoveAll() {
199	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
200			Vector v = new Vector();
201			v.add(one);
202			v.add(two);
203			full.removeAll(v);
204			assertEquals(1, full.size());
205	dl	1.1	}
206
207
208	dl	1.4	/**
209			* remove removes an element
210			*/
211			public void testRemove() {
212	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
213			full.remove(one);
214	dl	1.3	assertFalse(full.contains(one));
215	jsr166	1.11	assertEquals(2, full.size());
216	dl	1.1	}
217
218			/**
219	jsr166	1.16	* size returns the number of elements
220	dl	1.1	*/
221	dl	1.4	public void testSize() {
222	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
223			CopyOnWriteArraySet full = populatedSet(3);
224			assertEquals(3, full.size());
225			assertEquals(0, empty.size());
226	dl	1.1	}
227
228			/**
229	jsr166	1.16	* toArray returns an Object array containing all elements from the set
230	dl	1.1	*/
231	dl	1.4	public void testToArray() {
232	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
233			Object[] o = full.toArray();
234			assertEquals(3, o.length);
235	jsr166	1.14	assertEquals(0, o[0]);
236			assertEquals(1, o[1]);
237			assertEquals(2, o[2]);
238	dl	1.1	}
239
240			/**
241	jsr166	1.16	* toArray returns an Integer array containing all elements from
242			* the set
243	dl	1.1	*/
244	dl	1.4	public void testToArray2() {
245	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
246			Integer[] i = new Integer[3];
247			i = (Integer[])full.toArray(i);
248			assertEquals(3, i.length);
249	jsr166	1.14	assertEquals(0, (int) i[0]);
250			assertEquals(1, (int) i[1]);
251			assertEquals(2, (int) i[2]);
252	dl	1.1	}
253
254
255			/**
256	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
257			* not store the objects inside the set
258	dl	1.1	*/
259	dl	1.4	public void testToArray_ArrayStoreException() {
260			try {
261	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
262			c.add("zfasdfsdf");
263			c.add("asdadasd");
264			c.toArray(new Long[5]);
265	jsr166	1.11	shouldThrow();
266	jsr166	1.13	} catch (ArrayStoreException success) {}
267	dl	1.2	}
268
269	dl	1.4	/**
270	dl	1.7	* A deserialized serialized set is equal
271	dl	1.4	*/
272	jsr166	1.12	public void testSerialization() throws Exception {
273	dl	1.3	CopyOnWriteArraySet q = populatedSet(SIZE);
274	dl	1.2
275	jsr166	1.12	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
276			ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
277			out.writeObject(q);
278			out.close();
279
280			ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
281			ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
282			CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
283			assertEquals(q.size(), r.size());
284			assertTrue(q.equals(r));
285			assertTrue(r.equals(q));
286	dl	1.1	}
287
288			}