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.contains(String.valueOf(i)));
        }
    }

    /**
     * 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:	1.18
Committed:	Fri May 27 19:26:42 2011 UTC (12 years, 11 months ago) by jsr166
Branch:	MAIN
Changes since 1.17:	+1 -6 lines
Log Message:	indexOf => contains
#	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	1.1	/**
53	jsr166	1.16	* addAll adds each element from the given collection
54	dl	1.1	*/
55	dl	1.4	public void testAddAll() {
56	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
57			Vector v = new Vector();
58			v.add(three);
59			v.add(four);
60			v.add(five);
61			full.addAll(v);
62			assertEquals(6, full.size());
63	dl	1.1	}
64
65			/**
66	jsr166	1.16	* 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	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
71			Vector v = new Vector();
72			v.add(three);
73			v.add(four);
74			v.add(one); // will not add this element
75			full.addAll(v);
76			assertEquals(5, full.size());
77	dl	1.1	}
78
79			/**
80	jsr166	1.16	* 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	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
84			full.add(one);
85			assertEquals(3, full.size());
86	dl	1.1	}
87
88			/**
89	jsr166	1.16	* add adds the element when it does not exist in the set
90	dl	1.1	*/
91	dl	1.4	public void testAdd3() {
92	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
93	dl	1.3	full.add(three);
94			assertTrue(full.contains(three));
95	dl	1.1	}
96
97			/**
98	jsr166	1.16	* clear removes all elements from the set
99	dl	1.1	*/
100	dl	1.4	public void testClear() {
101	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
102			full.clear();
103			assertEquals(0, full.size());
104	dl	1.1	}
105
106			/**
107	jsr166	1.16	* contains returns true for added elements
108	dl	1.1	*/
109	dl	1.4	public void testContains() {
110	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
111			assertTrue(full.contains(one));
112			assertFalse(full.contains(five));
113	dl	1.1	}
114
115	dl	1.4	/**
116			* Sets with equal elements are equal
117			*/
118	dl	1.1	public void testEquals() {
119	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
120			CopyOnWriteArraySet b = populatedSet(3);
121	dl	1.1	assertTrue(a.equals(b));
122			assertTrue(b.equals(a));
123			assertEquals(a.hashCode(), b.hashCode());
124	dl	1.3	a.add(m1);
125	dl	1.1	assertFalse(a.equals(b));
126			assertFalse(b.equals(a));
127	dl	1.3	b.add(m1);
128	dl	1.1	assertTrue(a.equals(b));
129			assertTrue(b.equals(a));
130			assertEquals(a.hashCode(), b.hashCode());
131			}
132
133			/**
134	jsr166	1.16	* containsAll returns true for collections with subset of elements
135	dl	1.1	*/
136	dl	1.4	public void testContainsAll() {
137	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
138			Vector v = new Vector();
139			v.add(one);
140			v.add(two);
141			assertTrue(full.containsAll(v));
142			v.add(six);
143			assertFalse(full.containsAll(v));
144	dl	1.1	}
145
146			/**
147	jsr166	1.16	* isEmpty is true when empty, else false
148	dl	1.1	*/
149	dl	1.4	public void testIsEmpty() {
150	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
151			CopyOnWriteArraySet full = populatedSet(3);
152			assertTrue(empty.isEmpty());
153			assertFalse(full.isEmpty());
154	dl	1.1	}
155
156			/**
157	jsr166	1.16	* iterator() returns an iterator containing the elements of the set
158	dl	1.1	*/
159	dl	1.4	public void testIterator() {
160	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
161			Iterator i = full.iterator();
162			int j;
163			for (j = 0; i.hasNext(); j++)
164	jsr166	1.14	assertEquals(j, i.next());
165	jsr166	1.11	assertEquals(3, j);
166	dl	1.1	}
167
168	dl	1.4	/**
169			* iterator remove is unsupported
170			*/
171	jsr166	1.15	public void testIteratorRemove() {
172	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
173	dl	1.1	Iterator it = full.iterator();
174			it.next();
175			try {
176			it.remove();
177	dl	1.4	shouldThrow();
178	jsr166	1.12	} catch (UnsupportedOperationException success) {}
179	dl	1.1	}
180
181	dl	1.4	/**
182			* toString holds toString of elements
183			*/
184			public void testToString() {
185	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
186	dl	1.1	String s = full.toString();
187			for (int i = 0; i < 3; ++i) {
188	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
189	dl	1.1	}
190	jsr166	1.8	}
191	dl	1.1
192			/**
193	jsr166	1.16	* removeAll removes all elements from the given collection
194	dl	1.1	*/
195	dl	1.4	public void testRemoveAll() {
196	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
197			Vector v = new Vector();
198			v.add(one);
199			v.add(two);
200			full.removeAll(v);
201			assertEquals(1, full.size());
202	dl	1.1	}
203
204	dl	1.4	/**
205			* remove removes an element
206			*/
207			public void testRemove() {
208	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
209			full.remove(one);
210	dl	1.3	assertFalse(full.contains(one));
211	jsr166	1.11	assertEquals(2, full.size());
212	dl	1.1	}
213
214			/**
215	jsr166	1.16	* size returns the number of elements
216	dl	1.1	*/
217	dl	1.4	public void testSize() {
218	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
219			CopyOnWriteArraySet full = populatedSet(3);
220			assertEquals(3, full.size());
221			assertEquals(0, empty.size());
222	dl	1.1	}
223
224			/**
225	jsr166	1.16	* toArray returns an Object array containing all elements from the set
226	dl	1.1	*/
227	dl	1.4	public void testToArray() {
228	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
229			Object[] o = full.toArray();
230			assertEquals(3, o.length);
231	jsr166	1.14	assertEquals(0, o[0]);
232			assertEquals(1, o[1]);
233			assertEquals(2, o[2]);
234	dl	1.1	}
235
236			/**
237	jsr166	1.16	* toArray returns an Integer array containing all elements from
238			* the set
239	dl	1.1	*/
240	dl	1.4	public void testToArray2() {
241	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
242			Integer[] i = new Integer[3];
243			i = (Integer[])full.toArray(i);
244			assertEquals(3, i.length);
245	jsr166	1.14	assertEquals(0, (int) i[0]);
246			assertEquals(1, (int) i[1]);
247			assertEquals(2, (int) i[2]);
248	dl	1.1	}
249
250			/**
251	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
252			* not store the objects inside the set
253	dl	1.1	*/
254	dl	1.4	public void testToArray_ArrayStoreException() {
255			try {
256	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
257			c.add("zfasdfsdf");
258			c.add("asdadasd");
259			c.toArray(new Long[5]);
260	jsr166	1.11	shouldThrow();
261	jsr166	1.13	} catch (ArrayStoreException success) {}
262	dl	1.2	}
263
264	dl	1.4	/**
265	dl	1.7	* A deserialized serialized set is equal
266	dl	1.4	*/
267	jsr166	1.12	public void testSerialization() throws Exception {
268	dl	1.3	CopyOnWriteArraySet q = populatedSet(SIZE);
269	dl	1.2
270	jsr166	1.12	ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
271			ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
272			out.writeObject(q);
273			out.close();
274
275			ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
276			ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
277			CopyOnWriteArraySet r = (CopyOnWriteArraySet)in.readObject();
278			assertEquals(q.size(), r.size());
279			assertTrue(q.equals(r));
280			assertTrue(r.equals(q));
281	dl	1.1	}
282
283			}