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.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));
        CopyOnWriteArraySet<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() {
        CopyOnWriteArraySet 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));
        CopyOnWriteArraySet<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, y);
        assertEquals(y, x);
    }

}
Revision:	1.21
Committed:	Tue Nov 29 05:09:05 2011 UTC (12 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.20:	+65 -17 lines
Log Message:	improve toArray tests
#	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.Collections;
12	import java.util.Iterator;
13	import java.util.Set;
14	import java.util.Vector;
15	import java.util.concurrent.CopyOnWriteArraySet;
16
17	public class CopyOnWriteArraySetTest extends JSR166TestCase {
18	public static void main(String[] args) {
19	junit.textui.TestRunner.run(suite());
20	}
21	public static Test suite() {
22	return new TestSuite(CopyOnWriteArraySetTest.class);
23	}
24
25	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
26	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
27	assertTrue(a.isEmpty());
28	for (int i = 0; i < n; ++i)
29	a.add(i);
30	assertFalse(a.isEmpty());
31	assertEquals(n, a.size());
32	return a;
33	}
34
35	static CopyOnWriteArraySet populatedSet(Integer[] elements) {
36	CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
37	assertTrue(a.isEmpty());
38	for (int i = 0; i < elements.length; i++)
39	a.add(elements[i]);
40	assertFalse(a.isEmpty());
41	assertEquals(elements.length, a.size());
42	return a;
43	}
44
45	/**
46	* Default-constructed set is empty
47	*/
48	public void testConstructor() {
49	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
50	assertTrue(a.isEmpty());
51	}
52
53	/**
54	* Collection-constructed set holds all of its elements
55	*/
56	public void testConstructor3() {
57	Integer[] ints = new Integer[SIZE];
58	for (int i = 0; i < SIZE-1; ++i)
59	ints[i] = new Integer(i);
60	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
61	for (int i = 0; i < SIZE; ++i)
62	assertTrue(a.contains(ints[i]));
63	}
64
65	/**
66	* addAll adds each element from the given collection
67	*/
68	public void testAddAll() {
69	CopyOnWriteArraySet full = populatedSet(3);
70	Vector v = new Vector();
71	v.add(three);
72	v.add(four);
73	v.add(five);
74	full.addAll(v);
75	assertEquals(6, full.size());
76	}
77
78	/**
79	* addAll adds each element from the given collection that did not
80	* already exist in the set
81	*/
82	public void testAddAll2() {
83	CopyOnWriteArraySet full = populatedSet(3);
84	Vector v = new Vector();
85	v.add(three);
86	v.add(four);
87	v.add(one); // will not add this element
88	full.addAll(v);
89	assertEquals(5, full.size());
90	}
91
92	/**
93	* add will not add the element if it already exists in the set
94	*/
95	public void testAdd2() {
96	CopyOnWriteArraySet full = populatedSet(3);
97	full.add(one);
98	assertEquals(3, full.size());
99	}
100
101	/**
102	* add adds the element when it does not exist in the set
103	*/
104	public void testAdd3() {
105	CopyOnWriteArraySet full = populatedSet(3);
106	full.add(three);
107	assertTrue(full.contains(three));
108	}
109
110	/**
111	* clear removes all elements from the set
112	*/
113	public void testClear() {
114	CopyOnWriteArraySet full = populatedSet(3);
115	full.clear();
116	assertEquals(0, full.size());
117	}
118
119	/**
120	* contains returns true for added elements
121	*/
122	public void testContains() {
123	CopyOnWriteArraySet full = populatedSet(3);
124	assertTrue(full.contains(one));
125	assertFalse(full.contains(five));
126	}
127
128	/**
129	* Sets with equal elements are equal
130	*/
131	public void testEquals() {
132	CopyOnWriteArraySet a = populatedSet(3);
133	CopyOnWriteArraySet b = populatedSet(3);
134	assertTrue(a.equals(b));
135	assertTrue(b.equals(a));
136	assertEquals(a.hashCode(), b.hashCode());
137	a.add(m1);
138	assertFalse(a.equals(b));
139	assertFalse(b.equals(a));
140	b.add(m1);
141	assertTrue(a.equals(b));
142	assertTrue(b.equals(a));
143	assertEquals(a.hashCode(), b.hashCode());
144	}
145
146	/**
147	* containsAll returns true for collections with subset of elements
148	*/
149	public void testContainsAll() {
150	CopyOnWriteArraySet full = populatedSet(3);
151	Vector v = new Vector();
152	v.add(one);
153	v.add(two);
154	assertTrue(full.containsAll(v));
155	v.add(six);
156	assertFalse(full.containsAll(v));
157	}
158
159	/**
160	* isEmpty is true when empty, else false
161	*/
162	public void testIsEmpty() {
163	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
164	CopyOnWriteArraySet full = populatedSet(3);
165	assertTrue(empty.isEmpty());
166	assertFalse(full.isEmpty());
167	}
168
169	/**
170	* iterator() returns an iterator containing the elements of the set
171	*/
172	public void testIterator() {
173	CopyOnWriteArraySet full = populatedSet(3);
174	Iterator i = full.iterator();
175	int j;
176	for (j = 0; i.hasNext(); j++)
177	assertEquals(j, i.next());
178	assertEquals(3, j);
179	}
180
181	/**
182	* iterator remove is unsupported
183	*/
184	public void testIteratorRemove() {
185	CopyOnWriteArraySet full = populatedSet(3);
186	Iterator it = full.iterator();
187	it.next();
188	try {
189	it.remove();
190	shouldThrow();
191	} catch (UnsupportedOperationException success) {}
192	}
193
194	/**
195	* toString holds toString of elements
196	*/
197	public void testToString() {
198	CopyOnWriteArraySet full = populatedSet(3);
199	String s = full.toString();
200	for (int i = 0; i < 3; ++i) {
201	assertTrue(s.contains(String.valueOf(i)));
202	}
203	}
204
205	/**
206	* removeAll removes all elements from the given collection
207	*/
208	public void testRemoveAll() {
209	CopyOnWriteArraySet full = populatedSet(3);
210	Vector v = new Vector();
211	v.add(one);
212	v.add(two);
213	full.removeAll(v);
214	assertEquals(1, full.size());
215	}
216
217	/**
218	* remove removes an element
219	*/
220	public void testRemove() {
221	CopyOnWriteArraySet full = populatedSet(3);
222	full.remove(one);
223	assertFalse(full.contains(one));
224	assertEquals(2, full.size());
225	}
226
227	/**
228	* size returns the number of elements
229	*/
230	public void testSize() {
231	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
232	CopyOnWriteArraySet full = populatedSet(3);
233	assertEquals(3, full.size());
234	assertEquals(0, empty.size());
235	}
236
237	/**
238	* toArray() returns an Object array containing all elements from
239	* the set in insertion order
240	*/
241	public void testToArray() {
242	Object[] a = new CopyOnWriteArraySet().toArray();
243	assertTrue(Arrays.equals(new Object[0], a));
244	assertSame(Object[].class, a.getClass());
245
246	Integer[] elements = new Integer[SIZE];
247	for (int i = 0; i < SIZE; i++)
248	elements[i] = i;
249	Collections.shuffle(Arrays.asList(elements));
250	CopyOnWriteArraySet<Integer> full = populatedSet(elements);
251
252	assertTrue(Arrays.equals(elements, full.toArray()));
253	assertSame(Object[].class, full.toArray().getClass());
254	}
255
256	/**
257	* toArray(Integer array) returns an Integer array containing all
258	* elements from the set in insertion order
259	*/
260	public void testToArray2() {
261	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
262	Integer[] a;
263
264	a = new Integer[0];
265	assertSame(a, empty.toArray(a));
266
267	a = new Integer[SIZE/2];
268	Arrays.fill(a, 42);
269	assertSame(a, empty.toArray(a));
270	assertNull(a[0]);
271	for (int i = 1; i < a.length; i++)
272	assertEquals(42, (int) a[i]);
273
274	Integer[] elements = new Integer[SIZE];
275	for (int i = 0; i < SIZE; i++)
276	elements[i] = i;
277	Collections.shuffle(Arrays.asList(elements));
278	CopyOnWriteArraySet<Integer> full = populatedSet(elements);
279
280	Arrays.fill(a, 42);
281	assertTrue(Arrays.equals(elements, full.toArray(a)));
282	for (int i = 0; i < a.length; i++)
283	assertEquals(42, (int) a[i]);
284	assertSame(Integer[].class, full.toArray(a).getClass());
285
286	a = new Integer[SIZE];
287	Arrays.fill(a, 42);
288	assertSame(a, full.toArray(a));
289	assertTrue(Arrays.equals(elements, a));
290
291	a = new Integer[2*SIZE];
292	Arrays.fill(a, 42);
293	assertSame(a, full.toArray(a));
294	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
295	assertNull(a[SIZE]);
296	for (int i = SIZE + 1; i < a.length; i++)
297	assertEquals(42, (int) a[i]);
298	}
299
300	/**
301	* toArray throws an ArrayStoreException when the given array can
302	* not store the objects inside the set
303	*/
304	public void testToArray_ArrayStoreException() {
305	try {
306	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
307	c.add("zfasdfsdf");
308	c.add("asdadasd");
309	c.toArray(new Long[5]);
310	shouldThrow();
311	} catch (ArrayStoreException success) {}
312	}
313
314	/**
315	* A deserialized serialized set is equal
316	*/
317	public void testSerialization() throws Exception {
318	Set x = populatedSet(SIZE);
319	Set y = serialClone(x);
320
321	assertTrue(x != y);
322	assertEquals(x.size(), y.size());
323	assertEquals(x, y);
324	assertEquals(y, x);
325	}
326
327	}