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.Arrays;
import java.util.Iterator;
import java.util.Set;
import java.util.Vector;
import java.util.concurrent.CopyOnWriteArraySet;

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<Integer> full = populatedSet(SIZE);
        Object[] array = full.toArray();
        Iterator<Integer> it = full.iterator();
        for (int i = 0; i < SIZE; i++)
            assertSame(array[i], it.next());
        assertFalse(it.hasNext());
    }

    /**
     * toArray returns an Integer array containing all elements from
     * the set
     */
    public void testToArray2() {
        CopyOnWriteArraySet<Integer> full = populatedSet(SIZE);
        Integer[] ints = new Integer[SIZE];
        assertSame(ints, full.toArray(ints));
        Iterator<Integer> it = full.iterator();
        for (int i = 0; i < SIZE; i++)
            assertSame(ints[i], it.next());
        assertFalse(it.hasNext());
    }

    /**
     * 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 {
        Set x = populatedSet(SIZE);
        Set y = serialClone(x);

        assertTrue(x != y);
        assertEquals(x.size(), y.size());
        assertEquals(x, y);
        assertEquals(y, x);
    }

}
Revision:	1.20
Committed:	Sat Nov 26 07:39:02 2011 UTC (12 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.19:	+13 -13 lines
Log Message:	improve toArray methods
#	Content
1	/*
2	* 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/publicdomain/zero/1.0/
5	* Other contributors include Andrew Wright, Jeffrey Hayes,
6	* Pat Fisher, Mike Judd.
7	*/
8
9	import junit.framework.*;
10	import java.util.Arrays;
11	import java.util.Iterator;
12	import java.util.Set;
13	import java.util.Vector;
14	import java.util.concurrent.CopyOnWriteArraySet;
15
16	public class CopyOnWriteArraySetTest extends JSR166TestCase {
17	public static void main(String[] args) {
18	junit.textui.TestRunner.run(suite());
19	}
20	public static Test suite() {
21	return new TestSuite(CopyOnWriteArraySetTest.class);
22	}
23
24	static CopyOnWriteArraySet populatedSet(int n) {
25	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
26	assertTrue(a.isEmpty());
27	for (int i = 0; i < n; ++i)
28	a.add(new Integer(i));
29	assertFalse(a.isEmpty());
30	assertEquals(n, a.size());
31	return a;
32	}
33
34	/**
35	* Default-constructed set is empty
36	*/
37	public void testConstructor() {
38	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
39	assertTrue(a.isEmpty());
40	}
41
42	/**
43	* Collection-constructed set holds all of its elements
44	*/
45	public void testConstructor3() {
46	Integer[] ints = new Integer[SIZE];
47	for (int i = 0; i < SIZE-1; ++i)
48	ints[i] = new Integer(i);
49	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
50	for (int i = 0; i < SIZE; ++i)
51	assertTrue(a.contains(ints[i]));
52	}
53
54	/**
55	* addAll adds each element from the given collection
56	*/
57	public void testAddAll() {
58	CopyOnWriteArraySet full = populatedSet(3);
59	Vector v = new Vector();
60	v.add(three);
61	v.add(four);
62	v.add(five);
63	full.addAll(v);
64	assertEquals(6, full.size());
65	}
66
67	/**
68	* addAll adds each element from the given collection that did not
69	* already exist in the set
70	*/
71	public void testAddAll2() {
72	CopyOnWriteArraySet full = populatedSet(3);
73	Vector v = new Vector();
74	v.add(three);
75	v.add(four);
76	v.add(one); // will not add this element
77	full.addAll(v);
78	assertEquals(5, full.size());
79	}
80
81	/**
82	* add will not add the element if it already exists in the set
83	*/
84	public void testAdd2() {
85	CopyOnWriteArraySet full = populatedSet(3);
86	full.add(one);
87	assertEquals(3, full.size());
88	}
89
90	/**
91	* add adds the element when it does not exist in the set
92	*/
93	public void testAdd3() {
94	CopyOnWriteArraySet full = populatedSet(3);
95	full.add(three);
96	assertTrue(full.contains(three));
97	}
98
99	/**
100	* clear removes all elements from the set
101	*/
102	public void testClear() {
103	CopyOnWriteArraySet full = populatedSet(3);
104	full.clear();
105	assertEquals(0, full.size());
106	}
107
108	/**
109	* contains returns true for added elements
110	*/
111	public void testContains() {
112	CopyOnWriteArraySet full = populatedSet(3);
113	assertTrue(full.contains(one));
114	assertFalse(full.contains(five));
115	}
116
117	/**
118	* Sets with equal elements are equal
119	*/
120	public void testEquals() {
121	CopyOnWriteArraySet a = populatedSet(3);
122	CopyOnWriteArraySet b = populatedSet(3);
123	assertTrue(a.equals(b));
124	assertTrue(b.equals(a));
125	assertEquals(a.hashCode(), b.hashCode());
126	a.add(m1);
127	assertFalse(a.equals(b));
128	assertFalse(b.equals(a));
129	b.add(m1);
130	assertTrue(a.equals(b));
131	assertTrue(b.equals(a));
132	assertEquals(a.hashCode(), b.hashCode());
133	}
134
135	/**
136	* containsAll returns true for collections with subset of elements
137	*/
138	public void testContainsAll() {
139	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	}
147
148	/**
149	* isEmpty is true when empty, else false
150	*/
151	public void testIsEmpty() {
152	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
153	CopyOnWriteArraySet full = populatedSet(3);
154	assertTrue(empty.isEmpty());
155	assertFalse(full.isEmpty());
156	}
157
158	/**
159	* iterator() returns an iterator containing the elements of the set
160	*/
161	public void testIterator() {
162	CopyOnWriteArraySet full = populatedSet(3);
163	Iterator i = full.iterator();
164	int j;
165	for (j = 0; i.hasNext(); j++)
166	assertEquals(j, i.next());
167	assertEquals(3, j);
168	}
169
170	/**
171	* iterator remove is unsupported
172	*/
173	public void testIteratorRemove() {
174	CopyOnWriteArraySet full = populatedSet(3);
175	Iterator it = full.iterator();
176	it.next();
177	try {
178	it.remove();
179	shouldThrow();
180	} catch (UnsupportedOperationException success) {}
181	}
182
183	/**
184	* toString holds toString of elements
185	*/
186	public void testToString() {
187	CopyOnWriteArraySet full = populatedSet(3);
188	String s = full.toString();
189	for (int i = 0; i < 3; ++i) {
190	assertTrue(s.contains(String.valueOf(i)));
191	}
192	}
193
194	/**
195	* removeAll removes all elements from the given collection
196	*/
197	public void testRemoveAll() {
198	CopyOnWriteArraySet full = populatedSet(3);
199	Vector v = new Vector();
200	v.add(one);
201	v.add(two);
202	full.removeAll(v);
203	assertEquals(1, full.size());
204	}
205
206	/**
207	* remove removes an element
208	*/
209	public void testRemove() {
210	CopyOnWriteArraySet full = populatedSet(3);
211	full.remove(one);
212	assertFalse(full.contains(one));
213	assertEquals(2, full.size());
214	}
215
216	/**
217	* size returns the number of elements
218	*/
219	public void testSize() {
220	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
221	CopyOnWriteArraySet full = populatedSet(3);
222	assertEquals(3, full.size());
223	assertEquals(0, empty.size());
224	}
225
226	/**
227	* toArray returns an Object array containing all elements from the set
228	*/
229	public void testToArray() {
230	CopyOnWriteArraySet<Integer> full = populatedSet(SIZE);
231	Object[] array = full.toArray();
232	Iterator<Integer> it = full.iterator();
233	for (int i = 0; i < SIZE; i++)
234	assertSame(array[i], it.next());
235	assertFalse(it.hasNext());
236	}
237
238	/**
239	* toArray returns an Integer array containing all elements from
240	* the set
241	*/
242	public void testToArray2() {
243	CopyOnWriteArraySet<Integer> full = populatedSet(SIZE);
244	Integer[] ints = new Integer[SIZE];
245	assertSame(ints, full.toArray(ints));
246	Iterator<Integer> it = full.iterator();
247	for (int i = 0; i < SIZE; i++)
248	assertSame(ints[i], it.next());
249	assertFalse(it.hasNext());
250	}
251
252	/**
253	* toArray throws an ArrayStoreException when the given array can
254	* not store the objects inside the set
255	*/
256	public void testToArray_ArrayStoreException() {
257	try {
258	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
259	c.add("zfasdfsdf");
260	c.add("asdadasd");
261	c.toArray(new Long[5]);
262	shouldThrow();
263	} catch (ArrayStoreException success) {}
264	}
265
266	/**
267	* A deserialized serialized set is equal
268	*/
269	public void testSerialization() throws Exception {
270	Set x = populatedSet(SIZE);
271	Set y = serialClone(x);
272
273	assertTrue(x != y);
274	assertEquals(x.size(), y.size());
275	assertEquals(x, y);
276	assertEquals(y, x);
277	}
278
279	}