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
#	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	1.21	import java.util.Collections;
12	jsr166	1.19	import java.util.Iterator;
13			import java.util.Set;
14			import java.util.Vector;
15			import java.util.concurrent.CopyOnWriteArraySet;
16	dl	1.1
17	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
18	dl	1.1	public static void main(String[] args) {
19	jsr166	1.15	junit.textui.TestRunner.run(suite());
20	dl	1.1	}
21			public static Test suite() {
22	jsr166	1.11	return new TestSuite(CopyOnWriteArraySetTest.class);
23	dl	1.1	}
24
25	jsr166	1.21	static CopyOnWriteArraySet<Integer> populatedSet(int n) {
26			CopyOnWriteArraySet<Integer> a = new CopyOnWriteArraySet<Integer>();
27	dl	1.1	assertTrue(a.isEmpty());
28	jsr166	1.8	for (int i = 0; i < n; ++i)
29	jsr166	1.21	a.add(i);
30	dl	1.1	assertFalse(a.isEmpty());
31			assertEquals(n, a.size());
32			return a;
33			}
34
35	jsr166	1.21	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	dl	1.4	/**
46			* Default-constructed set is empty
47			*/
48	dl	1.3	public void testConstructor() {
49	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
50	dl	1.3	assertTrue(a.isEmpty());
51			}
52
53	dl	1.4	/**
54	dl	1.5	* Collection-constructed set holds all of its elements
55	dl	1.4	*/
56	dl	1.3	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	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
61	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
62	dl	1.3	assertTrue(a.contains(ints[i]));
63			}
64	jsr166	1.8
65	dl	1.1	/**
66	jsr166	1.16	* addAll adds each element from the given collection
67	dl	1.1	*/
68	dl	1.4	public void testAddAll() {
69	jsr166	1.11	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	dl	1.1	}
77
78			/**
79	jsr166	1.16	* addAll adds each element from the given collection that did not
80			* already exist in the set
81	dl	1.1	*/
82	dl	1.4	public void testAddAll2() {
83	jsr166	1.11	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	dl	1.1	}
91
92			/**
93	jsr166	1.16	* add will not add the element if it already exists in the set
94	dl	1.1	*/
95	dl	1.4	public void testAdd2() {
96	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
97			full.add(one);
98			assertEquals(3, full.size());
99	dl	1.1	}
100
101			/**
102	jsr166	1.16	* add adds the element when it does not exist in the set
103	dl	1.1	*/
104	dl	1.4	public void testAdd3() {
105	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
106	dl	1.3	full.add(three);
107			assertTrue(full.contains(three));
108	dl	1.1	}
109
110			/**
111	jsr166	1.16	* clear removes all elements from the set
112	dl	1.1	*/
113	dl	1.4	public void testClear() {
114	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
115			full.clear();
116			assertEquals(0, full.size());
117	dl	1.1	}
118
119			/**
120	jsr166	1.16	* contains returns true for added elements
121	dl	1.1	*/
122	dl	1.4	public void testContains() {
123	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
124			assertTrue(full.contains(one));
125			assertFalse(full.contains(five));
126	dl	1.1	}
127
128	dl	1.4	/**
129			* Sets with equal elements are equal
130			*/
131	dl	1.1	public void testEquals() {
132	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
133			CopyOnWriteArraySet b = populatedSet(3);
134	dl	1.1	assertTrue(a.equals(b));
135			assertTrue(b.equals(a));
136			assertEquals(a.hashCode(), b.hashCode());
137	dl	1.3	a.add(m1);
138	dl	1.1	assertFalse(a.equals(b));
139			assertFalse(b.equals(a));
140	dl	1.3	b.add(m1);
141	dl	1.1	assertTrue(a.equals(b));
142			assertTrue(b.equals(a));
143			assertEquals(a.hashCode(), b.hashCode());
144			}
145
146			/**
147	jsr166	1.16	* containsAll returns true for collections with subset of elements
148	dl	1.1	*/
149	dl	1.4	public void testContainsAll() {
150	jsr166	1.11	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	dl	1.1	}
158
159			/**
160	jsr166	1.16	* isEmpty is true when empty, else false
161	dl	1.1	*/
162	dl	1.4	public void testIsEmpty() {
163	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
164			CopyOnWriteArraySet full = populatedSet(3);
165			assertTrue(empty.isEmpty());
166			assertFalse(full.isEmpty());
167	dl	1.1	}
168
169			/**
170	jsr166	1.16	* iterator() returns an iterator containing the elements of the set
171	dl	1.1	*/
172	dl	1.4	public void testIterator() {
173	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
174			Iterator i = full.iterator();
175			int j;
176			for (j = 0; i.hasNext(); j++)
177	jsr166	1.14	assertEquals(j, i.next());
178	jsr166	1.11	assertEquals(3, j);
179	dl	1.1	}
180
181	dl	1.4	/**
182			* iterator remove is unsupported
183			*/
184	jsr166	1.15	public void testIteratorRemove() {
185	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
186	dl	1.1	Iterator it = full.iterator();
187			it.next();
188			try {
189			it.remove();
190	dl	1.4	shouldThrow();
191	jsr166	1.12	} catch (UnsupportedOperationException success) {}
192	dl	1.1	}
193
194	dl	1.4	/**
195			* toString holds toString of elements
196			*/
197			public void testToString() {
198	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
199	dl	1.1	String s = full.toString();
200			for (int i = 0; i < 3; ++i) {
201	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
202	dl	1.1	}
203	jsr166	1.8	}
204	dl	1.1
205			/**
206	jsr166	1.16	* removeAll removes all elements from the given collection
207	dl	1.1	*/
208	dl	1.4	public void testRemoveAll() {
209	jsr166	1.11	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	dl	1.1	}
216
217	dl	1.4	/**
218			* remove removes an element
219			*/
220			public void testRemove() {
221	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
222			full.remove(one);
223	dl	1.3	assertFalse(full.contains(one));
224	jsr166	1.11	assertEquals(2, full.size());
225	dl	1.1	}
226
227			/**
228	jsr166	1.16	* size returns the number of elements
229	dl	1.1	*/
230	dl	1.4	public void testSize() {
231	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
232			CopyOnWriteArraySet full = populatedSet(3);
233			assertEquals(3, full.size());
234			assertEquals(0, empty.size());
235	dl	1.1	}
236
237			/**
238	jsr166	1.21	* toArray() returns an Object array containing all elements from
239			* the set in insertion order
240	dl	1.1	*/
241	dl	1.4	public void testToArray() {
242	jsr166	1.21	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	jsr166	1.20	for (int i = 0; i < SIZE; i++)
248	jsr166	1.21	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	dl	1.1	}
255
256			/**
257	jsr166	1.21	* toArray(Integer array) returns an Integer array containing all
258			* elements from the set in insertion order
259	dl	1.1	*/
260	dl	1.4	public void testToArray2() {
261	jsr166	1.21	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	jsr166	1.20	for (int i = 0; i < SIZE; i++)
276	jsr166	1.21	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	dl	1.1	}
299
300			/**
301	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
302			* not store the objects inside the set
303	dl	1.1	*/
304	dl	1.4	public void testToArray_ArrayStoreException() {
305			try {
306	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
307			c.add("zfasdfsdf");
308			c.add("asdadasd");
309			c.toArray(new Long[5]);
310	jsr166	1.11	shouldThrow();
311	jsr166	1.13	} catch (ArrayStoreException success) {}
312	dl	1.2	}
313
314	dl	1.4	/**
315	dl	1.7	* A deserialized serialized set is equal
316	dl	1.4	*/
317	jsr166	1.12	public void testSerialization() throws Exception {
318	jsr166	1.19	Set x = populatedSet(SIZE);
319			Set y = serialClone(x);
320	dl	1.2
321	jsr166	1.19	assertTrue(x != y);
322			assertEquals(x.size(), y.size());
323			assertEquals(x, y);
324			assertEquals(y, x);
325	dl	1.1	}
326
327			}