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
#	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			import java.util.Iterator;
12			import java.util.Set;
13			import java.util.Vector;
14			import java.util.concurrent.CopyOnWriteArraySet;
15	dl	1.1
16	dl	1.3	public class CopyOnWriteArraySetTest extends JSR166TestCase {
17	dl	1.1	public static void main(String[] args) {
18	jsr166	1.15	junit.textui.TestRunner.run(suite());
19	dl	1.1	}
20			public static Test suite() {
21	jsr166	1.11	return new TestSuite(CopyOnWriteArraySetTest.class);
22	dl	1.1	}
23
24	jsr166	1.10	static CopyOnWriteArraySet populatedSet(int n) {
25	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
26	dl	1.1	assertTrue(a.isEmpty());
27	jsr166	1.8	for (int i = 0; i < n; ++i)
28	dl	1.1	a.add(new Integer(i));
29			assertFalse(a.isEmpty());
30			assertEquals(n, a.size());
31			return a;
32			}
33
34	dl	1.4	/**
35			* Default-constructed set is empty
36			*/
37	dl	1.3	public void testConstructor() {
38	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet();
39	dl	1.3	assertTrue(a.isEmpty());
40			}
41
42	dl	1.4	/**
43	dl	1.5	* Collection-constructed set holds all of its elements
44	dl	1.4	*/
45	dl	1.3	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	jsr166	1.11	CopyOnWriteArraySet a = new CopyOnWriteArraySet(Arrays.asList(ints));
50	jsr166	1.8	for (int i = 0; i < SIZE; ++i)
51	dl	1.3	assertTrue(a.contains(ints[i]));
52			}
53	jsr166	1.8
54	dl	1.1	/**
55	jsr166	1.16	* addAll adds each element from the given collection
56	dl	1.1	*/
57	dl	1.4	public void testAddAll() {
58	jsr166	1.11	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	dl	1.1	}
66
67			/**
68	jsr166	1.16	* addAll adds each element from the given collection that did not
69			* already exist in the set
70	dl	1.1	*/
71	dl	1.4	public void testAddAll2() {
72	jsr166	1.11	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	dl	1.1	}
80
81			/**
82	jsr166	1.16	* add will not add the element if it already exists in the set
83	dl	1.1	*/
84	dl	1.4	public void testAdd2() {
85	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
86			full.add(one);
87			assertEquals(3, full.size());
88	dl	1.1	}
89
90			/**
91	jsr166	1.16	* add adds the element when it does not exist in the set
92	dl	1.1	*/
93	dl	1.4	public void testAdd3() {
94	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
95	dl	1.3	full.add(three);
96			assertTrue(full.contains(three));
97	dl	1.1	}
98
99			/**
100	jsr166	1.16	* clear removes all elements from the set
101	dl	1.1	*/
102	dl	1.4	public void testClear() {
103	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
104			full.clear();
105			assertEquals(0, full.size());
106	dl	1.1	}
107
108			/**
109	jsr166	1.16	* contains returns true for added elements
110	dl	1.1	*/
111	dl	1.4	public void testContains() {
112	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
113			assertTrue(full.contains(one));
114			assertFalse(full.contains(five));
115	dl	1.1	}
116
117	dl	1.4	/**
118			* Sets with equal elements are equal
119			*/
120	dl	1.1	public void testEquals() {
121	jsr166	1.11	CopyOnWriteArraySet a = populatedSet(3);
122			CopyOnWriteArraySet b = populatedSet(3);
123	dl	1.1	assertTrue(a.equals(b));
124			assertTrue(b.equals(a));
125			assertEquals(a.hashCode(), b.hashCode());
126	dl	1.3	a.add(m1);
127	dl	1.1	assertFalse(a.equals(b));
128			assertFalse(b.equals(a));
129	dl	1.3	b.add(m1);
130	dl	1.1	assertTrue(a.equals(b));
131			assertTrue(b.equals(a));
132			assertEquals(a.hashCode(), b.hashCode());
133			}
134
135			/**
136	jsr166	1.16	* containsAll returns true for collections with subset of elements
137	dl	1.1	*/
138	dl	1.4	public void testContainsAll() {
139	jsr166	1.11	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	dl	1.1	}
147
148			/**
149	jsr166	1.16	* isEmpty is true when empty, else false
150	dl	1.1	*/
151	dl	1.4	public void testIsEmpty() {
152	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
153			CopyOnWriteArraySet full = populatedSet(3);
154			assertTrue(empty.isEmpty());
155			assertFalse(full.isEmpty());
156	dl	1.1	}
157
158			/**
159	jsr166	1.16	* iterator() returns an iterator containing the elements of the set
160	dl	1.1	*/
161	dl	1.4	public void testIterator() {
162	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
163			Iterator i = full.iterator();
164			int j;
165			for (j = 0; i.hasNext(); j++)
166	jsr166	1.14	assertEquals(j, i.next());
167	jsr166	1.11	assertEquals(3, j);
168	dl	1.1	}
169
170	dl	1.4	/**
171			* iterator remove is unsupported
172			*/
173	jsr166	1.15	public void testIteratorRemove() {
174	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
175	dl	1.1	Iterator it = full.iterator();
176			it.next();
177			try {
178			it.remove();
179	dl	1.4	shouldThrow();
180	jsr166	1.12	} catch (UnsupportedOperationException success) {}
181	dl	1.1	}
182
183	dl	1.4	/**
184			* toString holds toString of elements
185			*/
186			public void testToString() {
187	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
188	dl	1.1	String s = full.toString();
189			for (int i = 0; i < 3; ++i) {
190	jsr166	1.18	assertTrue(s.contains(String.valueOf(i)));
191	dl	1.1	}
192	jsr166	1.8	}
193	dl	1.1
194			/**
195	jsr166	1.16	* removeAll removes all elements from the given collection
196	dl	1.1	*/
197	dl	1.4	public void testRemoveAll() {
198	jsr166	1.11	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	dl	1.1	}
205
206	dl	1.4	/**
207			* remove removes an element
208			*/
209			public void testRemove() {
210	jsr166	1.11	CopyOnWriteArraySet full = populatedSet(3);
211			full.remove(one);
212	dl	1.3	assertFalse(full.contains(one));
213	jsr166	1.11	assertEquals(2, full.size());
214	dl	1.1	}
215
216			/**
217	jsr166	1.16	* size returns the number of elements
218	dl	1.1	*/
219	dl	1.4	public void testSize() {
220	jsr166	1.11	CopyOnWriteArraySet empty = new CopyOnWriteArraySet();
221			CopyOnWriteArraySet full = populatedSet(3);
222			assertEquals(3, full.size());
223			assertEquals(0, empty.size());
224	dl	1.1	}
225
226			/**
227	jsr166	1.16	* toArray returns an Object array containing all elements from the set
228	dl	1.1	*/
229	dl	1.4	public void testToArray() {
230	jsr166	1.20	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	dl	1.1	}
237
238			/**
239	jsr166	1.16	* toArray returns an Integer array containing all elements from
240			* the set
241	dl	1.1	*/
242	dl	1.4	public void testToArray2() {
243	jsr166	1.20	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	dl	1.1	}
251
252			/**
253	jsr166	1.16	* toArray throws an ArrayStoreException when the given array can
254			* not store the objects inside the set
255	dl	1.1	*/
256	dl	1.4	public void testToArray_ArrayStoreException() {
257			try {
258	dl	1.1	CopyOnWriteArraySet c = new CopyOnWriteArraySet();
259			c.add("zfasdfsdf");
260			c.add("asdadasd");
261			c.toArray(new Long[5]);
262	jsr166	1.11	shouldThrow();
263	jsr166	1.13	} catch (ArrayStoreException success) {}
264	dl	1.2	}
265
266	dl	1.4	/**
267	dl	1.7	* A deserialized serialized set is equal
268	dl	1.4	*/
269	jsr166	1.12	public void testSerialization() throws Exception {
270	jsr166	1.19	Set x = populatedSet(SIZE);
271			Set y = serialClone(x);
272	dl	1.2
273	jsr166	1.19	assertTrue(x != y);
274			assertEquals(x.size(), y.size());
275			assertEquals(x, y);
276			assertEquals(y, x);
277	dl	1.1	}
278
279			}