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, y);
        assertEquals(y, x);
    }

}
Revision:	1.22
Committed:	Tue Nov 29 05:23:56 2011 UTC (12 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.21:	+5 -4 lines
Log Message:	improve toArray tests
#	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	jsr166	1.19	import java.util.Arrays;
11	jsr166	1.22	import java.util.Collection;
12	jsr166	1.21	import java.util.Collections;
13	jsr166	1.19	import java.util.Iterator;
14			import java.util.Set;
15			import java.util.Vector;
16			import java.util.concurrent.CopyOnWriteArraySet;
17	dl	1.1
18	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
19	dl	1.1	public static void main(String[] args) {
20	jsr166	1.15	junit.textui.TestRunner.run(suite());
21	dl	1.1	}
22			public static Test suite() {
23	jsr166	1.11	return new TestSuite(CopyOnWriteArraySetTest.class);
24	dl	1.1	}
25
26	jsr166	1.21	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
27			CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
28	dl	1.1	assertTrue(a.isEmpty());
29	jsr166	1.22	for (int i = 0; i < n; i++)
30	jsr166	1.21	a.add(i);
31	dl	1.1	assertFalse(a.isEmpty());
32			assertEquals(n, a.size());
33			return a;
34			}
35
36	jsr166	1.21	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	dl	1.4	/**
47			* Default-constructed set is empty
48			*/
49	dl	1.3	public void testConstructor() {
50	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
51	dl	1.3	assertTrue(a.isEmpty());
52			}
53
54	dl	1.4	/**
55	dl	1.5	* Collection-constructed set holds all of its elements
56	dl	1.4	*/
57	dl	1.3	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	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
62	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
63	dl	1.3	assertTrue(a.contains(ints[i]));
64			}
65	jsr166	1.8
66	dl	1.1	/**
67	jsr166	1.16	* addAll adds each element from the given collection
68	dl	1.1	*/
69	dl	1.4	public void testAddAll() {
70	jsr166	1.11	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	dl	1.1	}
78
79			/**
80	jsr166	1.16	* addAll adds each element from the given collection that did not
81			* already exist in the set
82	dl	1.1	*/
83	dl	1.4	public void testAddAll2() {
84	jsr166	1.11	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	dl	1.1	}
92
93			/**
94	jsr166	1.16	* add will not add the element if it already exists in the set
95	dl	1.1	*/
96	dl	1.4	public void testAdd2() {
97	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
98			full.add(one);
99			assertEquals(3, full.size());
100	dl	1.1	}
101
102			/**
103	jsr166	1.16	* add adds the element when it does not exist in the set
104	dl	1.1	*/
105	dl	1.4	public void testAdd3() {
106	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
107	dl	1.3	full.add(three);
108			assertTrue(full.contains(three));
109	dl	1.1	}
110
111			/**
112	jsr166	1.16	* clear removes all elements from the set
113	dl	1.1	*/
114	dl	1.4	public void testClear() {
115	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
116			full.clear();
117			assertEquals(0, full.size());
118	dl	1.1	}
119
120			/**
121	jsr166	1.16	* contains returns true for added elements
122	dl	1.1	*/
123	dl	1.4	public void testContains() {
124	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
125			assertTrue(full.contains(one));
126			assertFalse(full.contains(five));
127	dl	1.1	}
128
129	dl	1.4	/**
130			* Sets with equal elements are equal
131			*/
132	dl	1.1	public void testEquals() {
133	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
134			CopyOnWriteArraySet b = populatedSet(3);
135	dl	1.1	assertTrue(a.equals(b));
136			assertTrue(b.equals(a));
137			assertEquals(a.hashCode(), b.hashCode());
138	dl	1.3	a.add(m1);
139	dl	1.1	assertFalse(a.equals(b));
140			assertFalse(b.equals(a));
141	dl	1.3	b.add(m1);
142	dl	1.1	assertTrue(a.equals(b));
143			assertTrue(b.equals(a));
144			assertEquals(a.hashCode(), b.hashCode());
145			}
146
147			/**
148	jsr166	1.16	* containsAll returns true for collections with subset of elements
149	dl	1.1	*/
150	dl	1.4	public void testContainsAll() {
151	jsr166	1.11	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	dl	1.1	}
159
160			/**
161	jsr166	1.16	* isEmpty is true when empty, else false
162	dl	1.1	*/
163	dl	1.4	public void testIsEmpty() {
164	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
165			CopyOnWriteArraySet full = populatedSet(3);
166			assertTrue(empty.isEmpty());
167			assertFalse(full.isEmpty());
168	dl	1.1	}
169
170			/**
171	jsr166	1.16	* iterator() returns an iterator containing the elements of the set
172	dl	1.1	*/
173	dl	1.4	public void testIterator() {
174	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
175			Iterator i = full.iterator();
176			int j;
177			for (j = 0; i.hasNext(); j++)
178	jsr166	1.14	assertEquals(j, i.next());
179	jsr166	1.11	assertEquals(3, j);
180	dl	1.1	}
181
182	dl	1.4	/**
183			* iterator remove is unsupported
184			*/
185	jsr166	1.15	public void testIteratorRemove() {
186	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
187	dl	1.1	Iterator it = full.iterator();
188			it.next();
189			try {
190			it.remove();
191	dl	1.4	shouldThrow();
192	jsr166	1.12	} catch (UnsupportedOperationException success) {}
193	dl	1.1	}
194
195	dl	1.4	/**
196			* toString holds toString of elements
197			*/
198			public void testToString() {
199	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
200	dl	1.1	String s = full.toString();
201			for (int i = 0; i < 3; ++i) {
202	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
203	dl	1.1	}
204	jsr166	1.8	}
205	dl	1.1
206			/**
207	jsr166	1.16	* removeAll removes all elements from the given collection
208	dl	1.1	*/
209	dl	1.4	public void testRemoveAll() {
210	jsr166	1.11	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	dl	1.1	}
217
218	dl	1.4	/**
219			* remove removes an element
220			*/
221			public void testRemove() {
222	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
223			full.remove(one);
224	dl	1.3	assertFalse(full.contains(one));
225	jsr166	1.11	assertEquals(2, full.size());
226	dl	1.1	}
227
228			/**
229	jsr166	1.16	* size returns the number of elements
230	dl	1.1	*/
231	dl	1.4	public void testSize() {
232	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
233			CopyOnWriteArraySet full = populatedSet(3);
234			assertEquals(3, full.size());
235			assertEquals(0, empty.size());
236	dl	1.1	}
237
238			/**
239	jsr166	1.21	* toArray() returns an Object array containing all elements from
240			* the set in insertion order
241	dl	1.1	*/
242	dl	1.4	public void testToArray() {
243	jsr166	1.21	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	jsr166	1.20	for (int i = 0; i < SIZE; i++)
249	jsr166	1.21	elements[i] = i;
250			Collections.shuffle(Arrays.asList(elements));
251	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
252	jsr166	1.21
253			assertTrue(Arrays.equals(elements, full.toArray()));
254			assertSame(Object[].class, full.toArray().getClass());
255	dl	1.1	}
256
257			/**
258	jsr166	1.21	* toArray(Integer array) returns an Integer array containing all
259			* elements from the set in insertion order
260	dl	1.1	*/
261	dl	1.4	public void testToArray2() {
262	jsr166	1.22	Collection empty = new CopyOnWriteArraySet();
263	jsr166	1.21	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	jsr166	1.20	for (int i = 0; i < SIZE; i++)
277	jsr166	1.21	elements[i] = i;
278			Collections.shuffle(Arrays.asList(elements));
279	jsr166	1.22	Collection<Integer> full = populatedSet(elements);
280	jsr166	1.21
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	dl	1.1	}
300
301			/**
302	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
303			* not store the objects inside the set
304	dl	1.1	*/
305	dl	1.4	public void testToArray_ArrayStoreException() {
306			try {
307	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
308			c.add("zfasdfsdf");
309			c.add("asdadasd");
310			c.toArray(new Long[5]);
311	jsr166	1.11	shouldThrow();
312	jsr166	1.13	} catch (ArrayStoreException success) {}
313	dl	1.2	}
314
315	dl	1.4	/**
316	dl	1.7	* A deserialized serialized set is equal
317	dl	1.4	*/
318	jsr166	1.12	public void testSerialization() throws Exception {
319	jsr166	1.19	Set x = populatedSet(SIZE);
320			Set y = serialClone(x);
321	dl	1.2
322	jsr166	1.19	assertTrue(x != y);
323			assertEquals(x.size(), y.size());
324			assertEquals(x, y);
325			assertEquals(y, x);
326	dl	1.1	}
327
328			}