test/tck/CopyOnWriteArrayListTest.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.LinkedList;
import java.util.List;
import java.util.ListIterator;
import java.util.Vector;
import java.util.concurrent.CopyOnWriteArrayList;

public class CopyOnWriteArrayListTest extends JSR166TestCase {

    public static void main(String[] args) {
        junit.textui.TestRunner.run(suite());
    }

    public static Test suite() {
        return new TestSuite(CopyOnWriteArrayListTest.class);
    }

    static CopyOnWriteArrayList<Integer> populatedArray(int n) {
        CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
        assertTrue(a.isEmpty());
        for (int i = 0; i < n; i++)
            a.add(i);
        assertFalse(a.isEmpty());
        assertEquals(n, a.size());
        return a;
    }

    static CopyOnWriteArrayList<Integer> populatedArray(Integer[] elements) {
        CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<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;
    }

    /**
     * a new list is empty
     */
    public void testConstructor() {
        CopyOnWriteArrayList a = new CopyOnWriteArrayList();
        assertTrue(a.isEmpty());
    }

    /**
     * new list contains all elements of initializing array
     */
    public void testConstructor2() {
        Integer[] ints = new Integer[SIZE];
        for (int i = 0; i < SIZE-1; ++i)
            ints[i] = new Integer(i);
        CopyOnWriteArrayList a = new CopyOnWriteArrayList(ints);
        for (int i = 0; i < SIZE; ++i)
            assertEquals(ints[i], a.get(i));
    }

    /**
     * new list contains all elements of initializing collection
     */
    public void testConstructor3() {
        Integer[] ints = new Integer[SIZE];
        for (int i = 0; i < SIZE-1; ++i)
            ints[i] = new Integer(i);
        CopyOnWriteArrayList a = new CopyOnWriteArrayList(Arrays.asList(ints));
        for (int i = 0; i < SIZE; ++i)
            assertEquals(ints[i], a.get(i));
    }

    /**
     * addAll adds each element from the given collection
     */
    public void testAddAll() {
        CopyOnWriteArrayList full = populatedArray(3);
        Vector v = new Vector();
        v.add(three);
        v.add(four);
        v.add(five);
        full.addAll(v);
        assertEquals(6, full.size());
    }

    /**
     * addAllAbsent adds each element from the given collection that did not
     * already exist in the List
     */
    public void testAddAllAbsent() {
        CopyOnWriteArrayList full = populatedArray(3);
        Vector v = new Vector();
        v.add(three);
        v.add(four);
        v.add(one); // will not add this element
        full.addAllAbsent(v);
        assertEquals(5, full.size());
    }

    /**
     * addIfAbsent will not add the element if it already exists in the list
     */
    public void testAddIfAbsent() {
        CopyOnWriteArrayList full = populatedArray(SIZE);
        full.addIfAbsent(one);
        assertEquals(SIZE, full.size());
    }

    /**
     * addIfAbsent adds the element when it does not exist in the list
     */
    public void testAddIfAbsent2() {
        CopyOnWriteArrayList full = populatedArray(SIZE);
        full.addIfAbsent(three);
        assertTrue(full.contains(three));
    }

    /**
     * clear removes all elements from the list
     */
    public void testClear() {
        CopyOnWriteArrayList full = populatedArray(SIZE);
        full.clear();
        assertEquals(0, full.size());
    }

    /**
     * Cloned list is equal
     */
    public void testClone() {
        CopyOnWriteArrayList l1 = populatedArray(SIZE);
        CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
        assertEquals(l1, l2);
        l1.clear();
        assertFalse(l1.equals(l2));
    }

    /**
     * contains is true for added elements
     */
    public void testContains() {
        CopyOnWriteArrayList full = populatedArray(3);
        assertTrue(full.contains(one));
        assertFalse(full.contains(five));
    }

    /**
     * adding at an index places it in the indicated index
     */
    public void testAddIndex() {
        CopyOnWriteArrayList full = populatedArray(3);
        full.add(0, m1);
        assertEquals(4, full.size());
        assertEquals(m1, full.get(0));
        assertEquals(zero, full.get(1));

        full.add(2, m2);
        assertEquals(5, full.size());
        assertEquals(m2, full.get(2));
        assertEquals(two, full.get(4));
    }

    /**
     * lists with same elements are equal and have same hashCode
     */
    public void testEquals() {
        CopyOnWriteArrayList a = populatedArray(3);
        CopyOnWriteArrayList b = populatedArray(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 collection with subset of elements
     */
    public void testContainsAll() {
        CopyOnWriteArrayList full = populatedArray(3);
        Vector v = new Vector();
        v.add(one);
        v.add(two);
        assertTrue(full.containsAll(v));
        v.add(six);
        assertFalse(full.containsAll(v));
    }

    /**
     * get returns the value at the given index
     */
    public void testGet() {
        CopyOnWriteArrayList full = populatedArray(3);
        assertEquals(0, full.get(0));
    }

    /**
     * indexOf gives the index for the given object
     */
    public void testIndexOf() {
        CopyOnWriteArrayList full = populatedArray(3);
        assertEquals(1, full.indexOf(one));
        assertEquals(-1, full.indexOf("puppies"));
    }

    /**
     * indexOf gives the index based on the given index
     * at which to start searching
     */
    public void testIndexOf2() {
        CopyOnWriteArrayList full = populatedArray(3);
        assertEquals(1, full.indexOf(one, 0));
        assertEquals(-1, full.indexOf(one, 2));
    }

    /**
     * isEmpty returns true when empty, else false
     */
    public void testIsEmpty() {
        CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
        CopyOnWriteArrayList full = populatedArray(SIZE);
        assertTrue(empty.isEmpty());
        assertFalse(full.isEmpty());
    }

    /**
     * iterator() returns an iterator containing the elements of the list
     */
    public void testIterator() {
        CopyOnWriteArrayList full = populatedArray(SIZE);
        Iterator i = full.iterator();
        int j;
        for (j = 0; i.hasNext(); j++)
            assertEquals(j, i.next());
        assertEquals(SIZE, j);
    }

    /**
     * iterator.remove throws UnsupportedOperationException
     */
    public void testIteratorRemove() {
        CopyOnWriteArrayList full = populatedArray(SIZE);
        Iterator it = full.iterator();
        it.next();
        try {
            it.remove();
            shouldThrow();
        } catch (UnsupportedOperationException success) {}
    }

    /**
     * toString contains toString of elements
     */
    public void testToString() {
        CopyOnWriteArrayList full = populatedArray(3);
        String s = full.toString();
        for (int i = 0; i < 3; ++i) {
            assertTrue(s.contains(String.valueOf(i)));
        }
    }

    /**
     * lastIndexOf returns the index for the given object
     */
    public void testLastIndexOf1() {
        CopyOnWriteArrayList full = populatedArray(3);
        full.add(one);
        full.add(three);
        assertEquals(3, full.lastIndexOf(one));
        assertEquals(-1, full.lastIndexOf(six));
    }

    /**
     * lastIndexOf returns the index from the given starting point
     */
    public void testLastIndexOf2() {
        CopyOnWriteArrayList full = populatedArray(3);
        full.add(one);
        full.add(three);
        assertEquals(3, full.lastIndexOf(one, 4));
        assertEquals(-1, full.lastIndexOf(three, 3));
    }

    /**
     * listIterator traverses all elements
     */
    public void testListIterator1() {
        CopyOnWriteArrayList full = populatedArray(SIZE);
        ListIterator i = full.listIterator();
        int j;
        for (j = 0; i.hasNext(); j++)
            assertEquals(j, i.next());
        assertEquals(SIZE, j);
    }

    /**
     * listIterator only returns those elements after the given index
     */
    public void testListIterator2() {
        CopyOnWriteArrayList full = populatedArray(3);
        ListIterator i = full.listIterator(1);
        int j;
        for (j = 0; i.hasNext(); j++)
            assertEquals(j+1, i.next());
        assertEquals(2, j);
    }

    /**
     * remove removes and returns the object at the given index
     */
    public void testRemove() {
        CopyOnWriteArrayList full = populatedArray(3);
        assertEquals(2, full.remove(2));
        assertEquals(2, full.size());
    }

    /**
     * removeAll removes all elements from the given collection
     */
    public void testRemoveAll() {
        CopyOnWriteArrayList full = populatedArray(3);
        Vector v = new Vector();
        v.add(one);
        v.add(two);
        full.removeAll(v);
        assertEquals(1, full.size());
    }

    /**
     * set changes the element at the given index
     */
    public void testSet() {
        CopyOnWriteArrayList full = populatedArray(3);
        assertEquals(2, full.set(2, four));
        assertEquals(4, full.get(2));
    }

    /**
     * size returns the number of elements
     */
    public void testSize() {
        CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
        CopyOnWriteArrayList full = populatedArray(SIZE);
        assertEquals(SIZE, full.size());
        assertEquals(0, empty.size());
    }

    /**
     * toArray() returns an Object array containing all elements from
     * the list in insertion order
     */
    public void testToArray() {
        Object[] a = new CopyOnWriteArrayList().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 = populatedArray(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 list in insertion order
     */
    public void testToArray2() {
        Collection empty = new CopyOnWriteArrayList();
        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 = populatedArray(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]);
    }

    /**
     * sublists contains elements at indexes offset from their base
     */
    public void testSubList() {
        CopyOnWriteArrayList a = populatedArray(10);
        assertTrue(a.subList(1,1).isEmpty());
        for (int j = 0; j < 9; ++j) {
            for (int i = j ; i < 10; ++i) {
                List b = a.subList(j,i);
                for (int k = j; k < i; ++k) {
                    assertEquals(new Integer(k), b.get(k-j));
                }
            }
        }

        List s = a.subList(2, 5);
        assertEquals(3, s.size());
        s.set(2, m1);
        assertEquals(a.get(4), m1);
        s.clear();
        assertEquals(7, a.size());
    }

    // Exception tests

    /**
     * toArray throws an ArrayStoreException when the given array
     * can not store the objects inside the list
     */
    public void testToArray_ArrayStoreException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("zfasdfsdf");
            c.add("asdadasd");
            c.toArray(new Long[5]);
            shouldThrow();
        } catch (ArrayStoreException success) {}
    }

    /**
     * get throws an IndexOutOfBoundsException on a negative index
     */
    public void testGet1_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.get(-1);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * get throws an IndexOutOfBoundsException on a too high index
     */
    public void testGet2_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("asdasd");
            c.add("asdad");
            c.get(100);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * set throws an IndexOutOfBoundsException on a negative index
     */
    public void testSet1_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.set(-1,"qwerty");
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * set throws an IndexOutOfBoundsException on a too high index
     */
    public void testSet2() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("asdasd");
            c.add("asdad");
            c.set(100, "qwerty");
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * add throws an IndexOutOfBoundsException on a negative index
     */
    public void testAdd1_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add(-1,"qwerty");
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * add throws an IndexOutOfBoundsException on a too high index
     */
    public void testAdd2_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("asdasd");
            c.add("asdasdasd");
            c.add(100, "qwerty");
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * remove throws an IndexOutOfBoundsException on a negative index
     */
    public void testRemove1_IndexOutOfBounds() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.remove(-1);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * remove throws an IndexOutOfBoundsException on a too high index
     */
    public void testRemove2_IndexOutOfBounds() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("asdasd");
            c.add("adasdasd");
            c.remove(100);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * addAll throws an IndexOutOfBoundsException on a negative index
     */
    public void testAddAll1_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.addAll(-1,new LinkedList());
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * addAll throws an IndexOutOfBoundsException on a too high index
     */
    public void testAddAll2_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("asdasd");
            c.add("asdasdasd");
            c.addAll(100, new LinkedList());
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * listIterator throws an IndexOutOfBoundsException on a negative index
     */
    public void testListIterator1_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.listIterator(-1);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * listIterator throws an IndexOutOfBoundsException on a too high index
     */
    public void testListIterator2_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("adasd");
            c.add("asdasdas");
            c.listIterator(100);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * subList throws an IndexOutOfBoundsException on a negative index
     */
    public void testSubList1_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.subList(-1,100);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * subList throws an IndexOutOfBoundsException on a too high index
     */
    public void testSubList2_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.add("asdasd");
            c.subList(1,100);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * subList throws IndexOutOfBoundsException when the second index
     * is lower then the first
     */
    public void testSubList3_IndexOutOfBoundsException() {
        try {
            CopyOnWriteArrayList c = new CopyOnWriteArrayList();
            c.subList(3,1);
            shouldThrow();
        } catch (IndexOutOfBoundsException success) {}
    }

    /**
     * a deserialized serialized list is equal
     */
    public void testSerialization() throws Exception {
        List x = populatedArray(SIZE);
        List 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);
        while (!x.isEmpty()) {
            assertFalse(y.isEmpty());
            assertEquals(x.remove(0), y.remove(0));
        }
        assertTrue(y.isEmpty());
    }

}
Revision:	1.26
Committed:	Tue Nov 29 05:23:56 2011 UTC (12 years, 5 months ago) by jsr166
Branch:	MAIN
Changes since 1.25:	+67 -20 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.Collection;
12	import java.util.Collections;
13	import java.util.Iterator;
14	import java.util.LinkedList;
15	import java.util.List;
16	import java.util.ListIterator;
17	import java.util.Vector;
18	import java.util.concurrent.CopyOnWriteArrayList;
19
20	public class CopyOnWriteArrayListTest extends JSR166TestCase {
21
22	public static void main(String[] args) {
23	junit.textui.TestRunner.run(suite());
24	}
25
26	public static Test suite() {
27	return new TestSuite(CopyOnWriteArrayListTest.class);
28	}
29
30	static CopyOnWriteArrayList<Integer> populatedArray(int n) {
31	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
32	assertTrue(a.isEmpty());
33	for (int i = 0; i < n; i++)
34	a.add(i);
35	assertFalse(a.isEmpty());
36	assertEquals(n, a.size());
37	return a;
38	}
39
40	static CopyOnWriteArrayList<Integer> populatedArray(Integer[] elements) {
41	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
42	assertTrue(a.isEmpty());
43	for (int i = 0; i < elements.length; i++)
44	a.add(elements[i]);
45	assertFalse(a.isEmpty());
46	assertEquals(elements.length, a.size());
47	return a;
48	}
49
50	/**
51	* a new list is empty
52	*/
53	public void testConstructor() {
54	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
55	assertTrue(a.isEmpty());
56	}
57
58	/**
59	* new list contains all elements of initializing array
60	*/
61	public void testConstructor2() {
62	Integer[] ints = new Integer[SIZE];
63	for (int i = 0; i < SIZE-1; ++i)
64	ints[i] = new Integer(i);
65	CopyOnWriteArrayList a = new CopyOnWriteArrayList(ints);
66	for (int i = 0; i < SIZE; ++i)
67	assertEquals(ints[i], a.get(i));
68	}
69
70	/**
71	* new list contains all elements of initializing collection
72	*/
73	public void testConstructor3() {
74	Integer[] ints = new Integer[SIZE];
75	for (int i = 0; i < SIZE-1; ++i)
76	ints[i] = new Integer(i);
77	CopyOnWriteArrayList a = new CopyOnWriteArrayList(Arrays.asList(ints));
78	for (int i = 0; i < SIZE; ++i)
79	assertEquals(ints[i], a.get(i));
80	}
81
82	/**
83	* addAll adds each element from the given collection
84	*/
85	public void testAddAll() {
86	CopyOnWriteArrayList full = populatedArray(3);
87	Vector v = new Vector();
88	v.add(three);
89	v.add(four);
90	v.add(five);
91	full.addAll(v);
92	assertEquals(6, full.size());
93	}
94
95	/**
96	* addAllAbsent adds each element from the given collection that did not
97	* already exist in the List
98	*/
99	public void testAddAllAbsent() {
100	CopyOnWriteArrayList full = populatedArray(3);
101	Vector v = new Vector();
102	v.add(three);
103	v.add(four);
104	v.add(one); // will not add this element
105	full.addAllAbsent(v);
106	assertEquals(5, full.size());
107	}
108
109	/**
110	* addIfAbsent will not add the element if it already exists in the list
111	*/
112	public void testAddIfAbsent() {
113	CopyOnWriteArrayList full = populatedArray(SIZE);
114	full.addIfAbsent(one);
115	assertEquals(SIZE, full.size());
116	}
117
118	/**
119	* addIfAbsent adds the element when it does not exist in the list
120	*/
121	public void testAddIfAbsent2() {
122	CopyOnWriteArrayList full = populatedArray(SIZE);
123	full.addIfAbsent(three);
124	assertTrue(full.contains(three));
125	}
126
127	/**
128	* clear removes all elements from the list
129	*/
130	public void testClear() {
131	CopyOnWriteArrayList full = populatedArray(SIZE);
132	full.clear();
133	assertEquals(0, full.size());
134	}
135
136	/**
137	* Cloned list is equal
138	*/
139	public void testClone() {
140	CopyOnWriteArrayList l1 = populatedArray(SIZE);
141	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
142	assertEquals(l1, l2);
143	l1.clear();
144	assertFalse(l1.equals(l2));
145	}
146
147	/**
148	* contains is true for added elements
149	*/
150	public void testContains() {
151	CopyOnWriteArrayList full = populatedArray(3);
152	assertTrue(full.contains(one));
153	assertFalse(full.contains(five));
154	}
155
156	/**
157	* adding at an index places it in the indicated index
158	*/
159	public void testAddIndex() {
160	CopyOnWriteArrayList full = populatedArray(3);
161	full.add(0, m1);
162	assertEquals(4, full.size());
163	assertEquals(m1, full.get(0));
164	assertEquals(zero, full.get(1));
165
166	full.add(2, m2);
167	assertEquals(5, full.size());
168	assertEquals(m2, full.get(2));
169	assertEquals(two, full.get(4));
170	}
171
172	/**
173	* lists with same elements are equal and have same hashCode
174	*/
175	public void testEquals() {
176	CopyOnWriteArrayList a = populatedArray(3);
177	CopyOnWriteArrayList b = populatedArray(3);
178	assertTrue(a.equals(b));
179	assertTrue(b.equals(a));
180	assertEquals(a.hashCode(), b.hashCode());
181	a.add(m1);
182	assertFalse(a.equals(b));
183	assertFalse(b.equals(a));
184	b.add(m1);
185	assertTrue(a.equals(b));
186	assertTrue(b.equals(a));
187	assertEquals(a.hashCode(), b.hashCode());
188	}
189
190	/**
191	* containsAll returns true for collection with subset of elements
192	*/
193	public void testContainsAll() {
194	CopyOnWriteArrayList full = populatedArray(3);
195	Vector v = new Vector();
196	v.add(one);
197	v.add(two);
198	assertTrue(full.containsAll(v));
199	v.add(six);
200	assertFalse(full.containsAll(v));
201	}
202
203	/**
204	* get returns the value at the given index
205	*/
206	public void testGet() {
207	CopyOnWriteArrayList full = populatedArray(3);
208	assertEquals(0, full.get(0));
209	}
210
211	/**
212	* indexOf gives the index for the given object
213	*/
214	public void testIndexOf() {
215	CopyOnWriteArrayList full = populatedArray(3);
216	assertEquals(1, full.indexOf(one));
217	assertEquals(-1, full.indexOf("puppies"));
218	}
219
220	/**
221	* indexOf gives the index based on the given index
222	* at which to start searching
223	*/
224	public void testIndexOf2() {
225	CopyOnWriteArrayList full = populatedArray(3);
226	assertEquals(1, full.indexOf(one, 0));
227	assertEquals(-1, full.indexOf(one, 2));
228	}
229
230	/**
231	* isEmpty returns true when empty, else false
232	*/
233	public void testIsEmpty() {
234	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
235	CopyOnWriteArrayList full = populatedArray(SIZE);
236	assertTrue(empty.isEmpty());
237	assertFalse(full.isEmpty());
238	}
239
240	/**
241	* iterator() returns an iterator containing the elements of the list
242	*/
243	public void testIterator() {
244	CopyOnWriteArrayList full = populatedArray(SIZE);
245	Iterator i = full.iterator();
246	int j;
247	for (j = 0; i.hasNext(); j++)
248	assertEquals(j, i.next());
249	assertEquals(SIZE, j);
250	}
251
252	/**
253	* iterator.remove throws UnsupportedOperationException
254	*/
255	public void testIteratorRemove() {
256	CopyOnWriteArrayList full = populatedArray(SIZE);
257	Iterator it = full.iterator();
258	it.next();
259	try {
260	it.remove();
261	shouldThrow();
262	} catch (UnsupportedOperationException success) {}
263	}
264
265	/**
266	* toString contains toString of elements
267	*/
268	public void testToString() {
269	CopyOnWriteArrayList full = populatedArray(3);
270	String s = full.toString();
271	for (int i = 0; i < 3; ++i) {
272	assertTrue(s.contains(String.valueOf(i)));
273	}
274	}
275
276	/**
277	* lastIndexOf returns the index for the given object
278	*/
279	public void testLastIndexOf1() {
280	CopyOnWriteArrayList full = populatedArray(3);
281	full.add(one);
282	full.add(three);
283	assertEquals(3, full.lastIndexOf(one));
284	assertEquals(-1, full.lastIndexOf(six));
285	}
286
287	/**
288	* lastIndexOf returns the index from the given starting point
289	*/
290	public void testLastIndexOf2() {
291	CopyOnWriteArrayList full = populatedArray(3);
292	full.add(one);
293	full.add(three);
294	assertEquals(3, full.lastIndexOf(one, 4));
295	assertEquals(-1, full.lastIndexOf(three, 3));
296	}
297
298	/**
299	* listIterator traverses all elements
300	*/
301	public void testListIterator1() {
302	CopyOnWriteArrayList full = populatedArray(SIZE);
303	ListIterator i = full.listIterator();
304	int j;
305	for (j = 0; i.hasNext(); j++)
306	assertEquals(j, i.next());
307	assertEquals(SIZE, j);
308	}
309
310	/**
311	* listIterator only returns those elements after the given index
312	*/
313	public void testListIterator2() {
314	CopyOnWriteArrayList full = populatedArray(3);
315	ListIterator i = full.listIterator(1);
316	int j;
317	for (j = 0; i.hasNext(); j++)
318	assertEquals(j+1, i.next());
319	assertEquals(2, j);
320	}
321
322	/**
323	* remove removes and returns the object at the given index
324	*/
325	public void testRemove() {
326	CopyOnWriteArrayList full = populatedArray(3);
327	assertEquals(2, full.remove(2));
328	assertEquals(2, full.size());
329	}
330
331	/**
332	* removeAll removes all elements from the given collection
333	*/
334	public void testRemoveAll() {
335	CopyOnWriteArrayList full = populatedArray(3);
336	Vector v = new Vector();
337	v.add(one);
338	v.add(two);
339	full.removeAll(v);
340	assertEquals(1, full.size());
341	}
342
343	/**
344	* set changes the element at the given index
345	*/
346	public void testSet() {
347	CopyOnWriteArrayList full = populatedArray(3);
348	assertEquals(2, full.set(2, four));
349	assertEquals(4, full.get(2));
350	}
351
352	/**
353	* size returns the number of elements
354	*/
355	public void testSize() {
356	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
357	CopyOnWriteArrayList full = populatedArray(SIZE);
358	assertEquals(SIZE, full.size());
359	assertEquals(0, empty.size());
360	}
361
362	/**
363	* toArray() returns an Object array containing all elements from
364	* the list in insertion order
365	*/
366	public void testToArray() {
367	Object[] a = new CopyOnWriteArrayList().toArray();
368	assertTrue(Arrays.equals(new Object[0], a));
369	assertSame(Object[].class, a.getClass());
370
371	Integer[] elements = new Integer[SIZE];
372	for (int i = 0; i < SIZE; i++)
373	elements[i] = i;
374	Collections.shuffle(Arrays.asList(elements));
375	Collection<Integer> full = populatedArray(elements);
376
377	assertTrue(Arrays.equals(elements, full.toArray()));
378	assertSame(Object[].class, full.toArray().getClass());
379	}
380
381	/**
382	* toArray(Integer array) returns an Integer array containing all
383	* elements from the list in insertion order
384	*/
385	public void testToArray2() {
386	Collection empty = new CopyOnWriteArrayList();
387	Integer[] a;
388
389	a = new Integer[0];
390	assertSame(a, empty.toArray(a));
391
392	a = new Integer[SIZE/2];
393	Arrays.fill(a, 42);
394	assertSame(a, empty.toArray(a));
395	assertNull(a[0]);
396	for (int i = 1; i < a.length; i++)
397	assertEquals(42, (int) a[i]);
398
399	Integer[] elements = new Integer[SIZE];
400	for (int i = 0; i < SIZE; i++)
401	elements[i] = i;
402	Collections.shuffle(Arrays.asList(elements));
403	Collection<Integer> full = populatedArray(elements);
404
405	Arrays.fill(a, 42);
406	assertTrue(Arrays.equals(elements, full.toArray(a)));
407	for (int i = 0; i < a.length; i++)
408	assertEquals(42, (int) a[i]);
409	assertSame(Integer[].class, full.toArray(a).getClass());
410
411	a = new Integer[SIZE];
412	Arrays.fill(a, 42);
413	assertSame(a, full.toArray(a));
414	assertTrue(Arrays.equals(elements, a));
415
416	a = new Integer[2*SIZE];
417	Arrays.fill(a, 42);
418	assertSame(a, full.toArray(a));
419	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
420	assertNull(a[SIZE]);
421	for (int i = SIZE + 1; i < a.length; i++)
422	assertEquals(42, (int) a[i]);
423	}
424
425	/**
426	* sublists contains elements at indexes offset from their base
427	*/
428	public void testSubList() {
429	CopyOnWriteArrayList a = populatedArray(10);
430	assertTrue(a.subList(1,1).isEmpty());
431	for (int j = 0; j < 9; ++j) {
432	for (int i = j ; i < 10; ++i) {
433	List b = a.subList(j,i);
434	for (int k = j; k < i; ++k) {
435	assertEquals(new Integer(k), b.get(k-j));
436	}
437	}
438	}
439
440	List s = a.subList(2, 5);
441	assertEquals(3, s.size());
442	s.set(2, m1);
443	assertEquals(a.get(4), m1);
444	s.clear();
445	assertEquals(7, a.size());
446	}
447
448	// Exception tests
449
450	/**
451	* toArray throws an ArrayStoreException when the given array
452	* can not store the objects inside the list
453	*/
454	public void testToArray_ArrayStoreException() {
455	try {
456	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
457	c.add("zfasdfsdf");
458	c.add("asdadasd");
459	c.toArray(new Long[5]);
460	shouldThrow();
461	} catch (ArrayStoreException success) {}
462	}
463
464	/**
465	* get throws an IndexOutOfBoundsException on a negative index
466	*/
467	public void testGet1_IndexOutOfBoundsException() {
468	try {
469	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
470	c.get(-1);
471	shouldThrow();
472	} catch (IndexOutOfBoundsException success) {}
473	}
474
475	/**
476	* get throws an IndexOutOfBoundsException on a too high index
477	*/
478	public void testGet2_IndexOutOfBoundsException() {
479	try {
480	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
481	c.add("asdasd");
482	c.add("asdad");
483	c.get(100);
484	shouldThrow();
485	} catch (IndexOutOfBoundsException success) {}
486	}
487
488	/**
489	* set throws an IndexOutOfBoundsException on a negative index
490	*/
491	public void testSet1_IndexOutOfBoundsException() {
492	try {
493	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
494	c.set(-1,"qwerty");
495	shouldThrow();
496	} catch (IndexOutOfBoundsException success) {}
497	}
498
499	/**
500	* set throws an IndexOutOfBoundsException on a too high index
501	*/
502	public void testSet2() {
503	try {
504	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
505	c.add("asdasd");
506	c.add("asdad");
507	c.set(100, "qwerty");
508	shouldThrow();
509	} catch (IndexOutOfBoundsException success) {}
510	}
511
512	/**
513	* add throws an IndexOutOfBoundsException on a negative index
514	*/
515	public void testAdd1_IndexOutOfBoundsException() {
516	try {
517	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
518	c.add(-1,"qwerty");
519	shouldThrow();
520	} catch (IndexOutOfBoundsException success) {}
521	}
522
523	/**
524	* add throws an IndexOutOfBoundsException on a too high index
525	*/
526	public void testAdd2_IndexOutOfBoundsException() {
527	try {
528	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
529	c.add("asdasd");
530	c.add("asdasdasd");
531	c.add(100, "qwerty");
532	shouldThrow();
533	} catch (IndexOutOfBoundsException success) {}
534	}
535
536	/**
537	* remove throws an IndexOutOfBoundsException on a negative index
538	*/
539	public void testRemove1_IndexOutOfBounds() {
540	try {
541	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
542	c.remove(-1);
543	shouldThrow();
544	} catch (IndexOutOfBoundsException success) {}
545	}
546
547	/**
548	* remove throws an IndexOutOfBoundsException on a too high index
549	*/
550	public void testRemove2_IndexOutOfBounds() {
551	try {
552	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
553	c.add("asdasd");
554	c.add("adasdasd");
555	c.remove(100);
556	shouldThrow();
557	} catch (IndexOutOfBoundsException success) {}
558	}
559
560	/**
561	* addAll throws an IndexOutOfBoundsException on a negative index
562	*/
563	public void testAddAll1_IndexOutOfBoundsException() {
564	try {
565	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
566	c.addAll(-1,new LinkedList());
567	shouldThrow();
568	} catch (IndexOutOfBoundsException success) {}
569	}
570
571	/**
572	* addAll throws an IndexOutOfBoundsException on a too high index
573	*/
574	public void testAddAll2_IndexOutOfBoundsException() {
575	try {
576	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
577	c.add("asdasd");
578	c.add("asdasdasd");
579	c.addAll(100, new LinkedList());
580	shouldThrow();
581	} catch (IndexOutOfBoundsException success) {}
582	}
583
584	/**
585	* listIterator throws an IndexOutOfBoundsException on a negative index
586	*/
587	public void testListIterator1_IndexOutOfBoundsException() {
588	try {
589	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
590	c.listIterator(-1);
591	shouldThrow();
592	} catch (IndexOutOfBoundsException success) {}
593	}
594
595	/**
596	* listIterator throws an IndexOutOfBoundsException on a too high index
597	*/
598	public void testListIterator2_IndexOutOfBoundsException() {
599	try {
600	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
601	c.add("adasd");
602	c.add("asdasdas");
603	c.listIterator(100);
604	shouldThrow();
605	} catch (IndexOutOfBoundsException success) {}
606	}
607
608	/**
609	* subList throws an IndexOutOfBoundsException on a negative index
610	*/
611	public void testSubList1_IndexOutOfBoundsException() {
612	try {
613	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
614	c.subList(-1,100);
615	shouldThrow();
616	} catch (IndexOutOfBoundsException success) {}
617	}
618
619	/**
620	* subList throws an IndexOutOfBoundsException on a too high index
621	*/
622	public void testSubList2_IndexOutOfBoundsException() {
623	try {
624	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
625	c.add("asdasd");
626	c.subList(1,100);
627	shouldThrow();
628	} catch (IndexOutOfBoundsException success) {}
629	}
630
631	/**
632	* subList throws IndexOutOfBoundsException when the second index
633	* is lower then the first
634	*/
635	public void testSubList3_IndexOutOfBoundsException() {
636	try {
637	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
638	c.subList(3,1);
639	shouldThrow();
640	} catch (IndexOutOfBoundsException success) {}
641	}
642
643	/**
644	* a deserialized serialized list is equal
645	*/
646	public void testSerialization() throws Exception {
647	List x = populatedArray(SIZE);
648	List y = serialClone(x);
649
650	assertTrue(x != y);
651	assertEquals(x.size(), y.size());
652	assertEquals(x.toString(), y.toString());
653	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
654	assertEquals(x, y);
655	assertEquals(y, x);
656	while (!x.isEmpty()) {
657	assertFalse(y.isEmpty());
658	assertEquals(x.remove(0), y.remove(0));
659	}
660	assertTrue(y.isEmpty());
661	}
662
663	}