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, 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:	1.14
Committed:	Sun Nov 22 18:57:17 2009 UTC (14 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.13:	+7 -7 lines
Log Message:	use autoboxing judiciously for readability
#	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	1.11	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	1.12	* 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	1.12	* addAll adds each element from the given collection that did not
68	dl	1.5	* 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	1.12	* 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	1.12	* 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	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
95	dl	1.3	full.add(three);
96			assertTrue(full.contains(three));
97	dl	1.1	}
98
99			/**
100	jsr166	1.12	* clear removes all elements from the set
101	dl	1.1	*/
102	dl	1.4	public void testClear() {
103	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
104			full.clear();
105			assertEquals(0, full.size());
106	dl	1.1	}
107
108			/**
109	dl	1.5	* contains returns true for added elements
110	dl	1.1	*/
111	dl	1.4	public void testContains() {
112	jsr166	1.11	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	jsr166	1.11	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	jsr166	1.12	* containsAll returns true for collections with subset of elements
138	dl	1.1	*/
139	dl	1.4	public void testContainsAll() {
140	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
141			Vector v = new Vector();
142			v.add(one);
143			v.add(two);
144			assertTrue(full.containsAll(v));
145			v.add(six);
146			assertFalse(full.containsAll(v));
147	dl	1.1	}
148
149			/**
150	jsr166	1.12	* isEmpty is true when empty, else false
151	dl	1.1	*/
152	dl	1.4	public void testIsEmpty() {
153	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
154			CopyOnWriteArraySet full = populatedSet(3);
155			assertTrue(empty.isEmpty());
156			assertFalse(full.isEmpty());
157	dl	1.1	}
158
159			/**
160	jsr166	1.12	* iterator() returns an iterator containing the elements of the set
161	dl	1.1	*/
162	dl	1.4	public void testIterator() {
163	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
164			Iterator i = full.iterator();
165			int j;
166			for (j = 0; i.hasNext(); j++)
167	jsr166	1.14	assertEquals(j, i.next());
168	jsr166	1.11	assertEquals(3, j);
169	dl	1.1	}
170
171	dl	1.4	/**
172			* iterator remove is unsupported
173			*/
174	dl	1.1	public void testIteratorRemove () {
175	jsr166	1.11	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	jsr166	1.12	} catch (UnsupportedOperationException success) {}
182	dl	1.1	}
183
184	dl	1.4	/**
185			* toString holds toString of elements
186			*/
187			public void testToString() {
188	jsr166	1.11	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	jsr166	1.8	}
194	dl	1.1
195
196			/**
197	jsr166	1.12	* removeAll removes all elements from the given collection
198	dl	1.1	*/
199	dl	1.4	public void testRemoveAll() {
200	jsr166	1.11	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	dl	1.1	}
207
208
209	dl	1.4	/**
210			* remove removes an element
211			*/
212			public void testRemove() {
213	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
214			full.remove(one);
215	dl	1.3	assertFalse(full.contains(one));
216	jsr166	1.11	assertEquals(2, full.size());
217	dl	1.1	}
218
219			/**
220	jsr166	1.12	* size returns the number of elements
221	dl	1.1	*/
222	dl	1.4	public void testSize() {
223	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
224			CopyOnWriteArraySet full = populatedSet(3);
225			assertEquals(3, full.size());
226			assertEquals(0, empty.size());
227	dl	1.1	}
228
229			/**
230	jsr166	1.12	* toArray returns an Object array containing all elements from the set
231	dl	1.1	*/
232	dl	1.4	public void testToArray() {
233	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
234			Object[] o = full.toArray();
235			assertEquals(3, o.length);
236	jsr166	1.14	assertEquals(0, o[0]);
237			assertEquals(1, o[1]);
238			assertEquals(2, o[2]);
239	dl	1.1	}
240
241			/**
242	jsr166	1.12	* toArray returns an Integer array containing all elements from
243			* the set
244	dl	1.1	*/
245	dl	1.4	public void testToArray2() {
246	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
247			Integer[] i = new Integer[3];
248			i = (Integer[])full.toArray(i);
249			assertEquals(3, i.length);
250	jsr166	1.14	assertEquals(0, (int) i[0]);
251			assertEquals(1, (int) i[1]);
252			assertEquals(2, (int) i[2]);
253	dl	1.1	}
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	jsr166	1.11	shouldThrow();
267	jsr166	1.13	} catch (ArrayStoreException success) {}
268	dl	1.2	}
269
270	dl	1.4	/**
271	dl	1.7	* A deserialized serialized set is equal
272	dl	1.4	*/
273	jsr166	1.12	public void testSerialization() throws Exception {
274	dl	1.3	CopyOnWriteArraySet q = populatedSet(SIZE);
275	dl	1.2
276	jsr166	1.12	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
277			ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
278			out.writeObject(q);
279			out.close();
280
281			ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
282			ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
283			CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
284			assertEquals(q.size(), r.size());
285			assertTrue(q.equals(r));
286			assertTrue(r.equals(q));
287	dl	1.1	}
288
289			}