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.Collection;
import java.util.Collections;
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<Integer> populatedSet(int n) {
        CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
        assertTrue(a.isEmpty());
        for (int i = 0; i < n; i++)
            a.add(i);
        assertFalse(a.isEmpty());
        assertEquals(n, a.size());
        return a;
    }

    static CopyOnWriteArraySet populatedSet(Integer[] elements) {
        CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
        assertTrue(a.isEmpty());
        for (int i = 0; i < elements.length; i++)
            a.add(elements[i]);
        assertFalse(a.isEmpty());
        assertEquals(elements.length, 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 in insertion order
     */
    public void testToArray() {
        Object[] a = new CopyOnWriteArraySet().toArray();
        assertTrue(Arrays.equals(new Object[0], a));
        assertSame(Object[].class, a.getClass());

        Integer[] elements = new Integer[SIZE];
        for (int i = 0; i < SIZE; i++)
            elements[i] = i;
        Collections.shuffle(Arrays.asList(elements));
        Collection<Integer> full = populatedSet(elements);

        assertTrue(Arrays.equals(elements, full.toArray()));
        assertSame(Object[].class, full.toArray().getClass());
    }

    /**
     * toArray(Integer array) returns an Integer array containing all
     * elements from the set in insertion order
     */
    public void testToArray2() {
        Collection empty = new CopyOnWriteArraySet();
        Integer[] a;

        a = new Integer[0];
        assertSame(a, empty.toArray(a));

        a = new Integer[SIZE/2];
        Arrays.fill(a, 42);
        assertSame(a, empty.toArray(a));
        assertNull(a[0]);
        for (int i = 1; i < a.length; i++)
            assertEquals(42, (int) a[i]);

        Integer[] elements = new Integer[SIZE];
        for (int i = 0; i < SIZE; i++)
            elements[i] = i;
        Collections.shuffle(Arrays.asList(elements));
        Collection<Integer> full = populatedSet(elements);

        Arrays.fill(a, 42);
        assertTrue(Arrays.equals(elements, full.toArray(a)));
        for (int i = 0; i < a.length; i++)
            assertEquals(42, (int) a[i]);
        assertSame(Integer[].class, full.toArray(a).getClass());

        a = new Integer[SIZE];
        Arrays.fill(a, 42);
        assertSame(a, full.toArray(a));
        assertTrue(Arrays.equals(elements, a));

        a = new Integer[2*SIZE];
        Arrays.fill(a, 42);
        assertSame(a, full.toArray(a));
        assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
        assertNull(a[SIZE]);
        for (int i = SIZE + 1; i < a.length; i++)
            assertEquals(42, (int) a[i]);
    }

    /**
     * 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.toString(), y.toString());
        assertTrue(Arrays.equals(x.toArray(), y.toArray()));
        assertEquals(x, y);
        assertEquals(y, x);
    }

}
Revision:	1.23
Committed:	Tue Nov 29 20:49:39 2011 UTC (12 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.22:	+2 -0 lines
Log Message:	improve testSerialization
#	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.Collection;
12	import java.util.Collections;
13	import java.util.Iterator;
14	import java.util.Set;
15	import java.util.Vector;
16	import java.util.concurrent.CopyOnWriteArraySet;
17
18	public class CopyOnWriteArraySetTest extends JSR166TestCase {
19	public static void main(String[] args) {
20	junit.textui.TestRunner.run(suite());
21	}
22	public static Test suite() {
23	return new TestSuite(CopyOnWriteArraySetTest.class);
24	}
25
26	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
27	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
28	assertTrue(a.isEmpty());
29	for (int i = 0; i < n; i++)
30	a.add(i);
31	assertFalse(a.isEmpty());
32	assertEquals(n, a.size());
33	return a;
34	}
35
36	static CopyOnWriteArraySet populatedSet(Integer[] elements) {
37	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
38	assertTrue(a.isEmpty());
39	for (int i = 0; i < elements.length; i++)
40	a.add(elements[i]);
41	assertFalse(a.isEmpty());
42	assertEquals(elements.length, a.size());
43	return a;
44	}
45
46	/**
47	* Default-constructed set is empty
48	*/
49	public void testConstructor() {
50	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
51	assertTrue(a.isEmpty());
52	}
53
54	/**
55	* Collection-constructed set holds all of its elements
56	*/
57	public void testConstructor3() {
58	Integer[] ints = new Integer[SIZE];
59	for (int i = 0; i < SIZE-1; ++i)
60	ints[i] = new Integer(i);
61	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
62	for (int i = 0; i < SIZE; ++i)
63	assertTrue(a.contains(ints[i]));
64	}
65
66	/**
67	* addAll adds each element from the given collection
68	*/
69	public void testAddAll() {
70	CopyOnWriteArraySet full = populatedSet(3);
71	Vector v = new Vector();
72	v.add(three);
73	v.add(four);
74	v.add(five);
75	full.addAll(v);
76	assertEquals(6, full.size());
77	}
78
79	/**
80	* addAll adds each element from the given collection that did not
81	* already exist in the set
82	*/
83	public void testAddAll2() {
84	CopyOnWriteArraySet full = populatedSet(3);
85	Vector v = new Vector();
86	v.add(three);
87	v.add(four);
88	v.add(one); // will not add this element
89	full.addAll(v);
90	assertEquals(5, full.size());
91	}
92
93	/**
94	* add will not add the element if it already exists in the set
95	*/
96	public void testAdd2() {
97	CopyOnWriteArraySet full = populatedSet(3);
98	full.add(one);
99	assertEquals(3, full.size());
100	}
101
102	/**
103	* add adds the element when it does not exist in the set
104	*/
105	public void testAdd3() {
106	CopyOnWriteArraySet full = populatedSet(3);
107	full.add(three);
108	assertTrue(full.contains(three));
109	}
110
111	/**
112	* clear removes all elements from the set
113	*/
114	public void testClear() {
115	CopyOnWriteArraySet full = populatedSet(3);
116	full.clear();
117	assertEquals(0, full.size());
118	}
119
120	/**
121	* contains returns true for added elements
122	*/
123	public void testContains() {
124	CopyOnWriteArraySet full = populatedSet(3);
125	assertTrue(full.contains(one));
126	assertFalse(full.contains(five));
127	}
128
129	/**
130	* Sets with equal elements are equal
131	*/
132	public void testEquals() {
133	CopyOnWriteArraySet a = populatedSet(3);
134	CopyOnWriteArraySet b = populatedSet(3);
135	assertTrue(a.equals(b));
136	assertTrue(b.equals(a));
137	assertEquals(a.hashCode(), b.hashCode());
138	a.add(m1);
139	assertFalse(a.equals(b));
140	assertFalse(b.equals(a));
141	b.add(m1);
142	assertTrue(a.equals(b));
143	assertTrue(b.equals(a));
144	assertEquals(a.hashCode(), b.hashCode());
145	}
146
147	/**
148	* containsAll returns true for collections with subset of elements
149	*/
150	public void testContainsAll() {
151	CopyOnWriteArraySet full = populatedSet(3);
152	Vector v = new Vector();
153	v.add(one);
154	v.add(two);
155	assertTrue(full.containsAll(v));
156	v.add(six);
157	assertFalse(full.containsAll(v));
158	}
159
160	/**
161	* isEmpty is true when empty, else false
162	*/
163	public void testIsEmpty() {
164	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
165	CopyOnWriteArraySet full = populatedSet(3);
166	assertTrue(empty.isEmpty());
167	assertFalse(full.isEmpty());
168	}
169
170	/**
171	* iterator() returns an iterator containing the elements of the set
172	*/
173	public void testIterator() {
174	CopyOnWriteArraySet full = populatedSet(3);
175	Iterator i = full.iterator();
176	int j;
177	for (j = 0; i.hasNext(); j++)
178	assertEquals(j, i.next());
179	assertEquals(3, j);
180	}
181
182	/**
183	* iterator remove is unsupported
184	*/
185	public void testIteratorRemove() {
186	CopyOnWriteArraySet full = populatedSet(3);
187	Iterator it = full.iterator();
188	it.next();
189	try {
190	it.remove();
191	shouldThrow();
192	} catch (UnsupportedOperationException success) {}
193	}
194
195	/**
196	* toString holds toString of elements
197	*/
198	public void testToString() {
199	CopyOnWriteArraySet full = populatedSet(3);
200	String s = full.toString();
201	for (int i = 0; i < 3; ++i) {
202	assertTrue(s.contains(String.valueOf(i)));
203	}
204	}
205
206	/**
207	* removeAll removes all elements from the given collection
208	*/
209	public void testRemoveAll() {
210	CopyOnWriteArraySet full = populatedSet(3);
211	Vector v = new Vector();
212	v.add(one);
213	v.add(two);
214	full.removeAll(v);
215	assertEquals(1, full.size());
216	}
217
218	/**
219	* remove removes an element
220	*/
221	public void testRemove() {
222	CopyOnWriteArraySet full = populatedSet(3);
223	full.remove(one);
224	assertFalse(full.contains(one));
225	assertEquals(2, full.size());
226	}
227
228	/**
229	* size returns the number of elements
230	*/
231	public void testSize() {
232	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
233	CopyOnWriteArraySet full = populatedSet(3);
234	assertEquals(3, full.size());
235	assertEquals(0, empty.size());
236	}
237
238	/**
239	* toArray() returns an Object array containing all elements from
240	* the set in insertion order
241	*/
242	public void testToArray() {
243	Object[] a = new CopyOnWriteArraySet().toArray();
244	assertTrue(Arrays.equals(new Object[0], a));
245	assertSame(Object[].class, a.getClass());
246
247	Integer[] elements = new Integer[SIZE];
248	for (int i = 0; i < SIZE; i++)
249	elements[i] = i;
250	Collections.shuffle(Arrays.asList(elements));
251	Collection<Integer> full = populatedSet(elements);
252
253	assertTrue(Arrays.equals(elements, full.toArray()));
254	assertSame(Object[].class, full.toArray().getClass());
255	}
256
257	/**
258	* toArray(Integer array) returns an Integer array containing all
259	* elements from the set in insertion order
260	*/
261	public void testToArray2() {
262	Collection empty = new CopyOnWriteArraySet();
263	Integer[] a;
264
265	a = new Integer[0];
266	assertSame(a, empty.toArray(a));
267
268	a = new Integer[SIZE/2];
269	Arrays.fill(a, 42);
270	assertSame(a, empty.toArray(a));
271	assertNull(a[0]);
272	for (int i = 1; i < a.length; i++)
273	assertEquals(42, (int) a[i]);
274
275	Integer[] elements = new Integer[SIZE];
276	for (int i = 0; i < SIZE; i++)
277	elements[i] = i;
278	Collections.shuffle(Arrays.asList(elements));
279	Collection<Integer> full = populatedSet(elements);
280
281	Arrays.fill(a, 42);
282	assertTrue(Arrays.equals(elements, full.toArray(a)));
283	for (int i = 0; i < a.length; i++)
284	assertEquals(42, (int) a[i]);
285	assertSame(Integer[].class, full.toArray(a).getClass());
286
287	a = new Integer[SIZE];
288	Arrays.fill(a, 42);
289	assertSame(a, full.toArray(a));
290	assertTrue(Arrays.equals(elements, a));
291
292	a = new Integer[2*SIZE];
293	Arrays.fill(a, 42);
294	assertSame(a, full.toArray(a));
295	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
296	assertNull(a[SIZE]);
297	for (int i = SIZE + 1; i < a.length; i++)
298	assertEquals(42, (int) a[i]);
299	}
300
301	/**
302	* toArray throws an ArrayStoreException when the given array can
303	* not store the objects inside the set
304	*/
305	public void testToArray_ArrayStoreException() {
306	try {
307	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
308	c.add("zfasdfsdf");
309	c.add("asdadasd");
310	c.toArray(new Long[5]);
311	shouldThrow();
312	} catch (ArrayStoreException success) {}
313	}
314
315	/**
316	* A deserialized serialized set is equal
317	*/
318	public void testSerialization() throws Exception {
319	Set x = populatedSet(SIZE);
320	Set y = serialClone(x);
321
322	assertTrue(x != y);
323	assertEquals(x.size(), y.size());
324	assertEquals(x.toString(), y.toString());
325	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
326	assertEquals(x, y);
327	assertEquals(y, x);
328	}
329
330	}