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.ArrayList;
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.NoSuchElementException;
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 in insertion order
     */
    public void testIterator() {
        Collection empty = new CopyOnWriteArrayList();
        assertFalse(empty.iterator().hasNext());
        try {
            empty.iterator().next();
            shouldThrow();
        } catch (NoSuchElementException success) {}

        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);

        Iterator it = full.iterator();
        for (int j = 0; j < SIZE; j++) {
            assertTrue(it.hasNext());
            assertEquals(elements[j], it.next());
        }
        assertFalse(it.hasNext());
        try {
            it.next();
            shouldThrow();
        } catch (NoSuchElementException success) {}
    }

    /**
     * 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() {
        assertEquals("[]", new CopyOnWriteArrayList().toString());
        CopyOnWriteArrayList full = populatedArray(3);
        String s = full.toString();
        for (int i = 0; i < 3; ++i)
            assertTrue(s.contains(String.valueOf(i)));
        assertEquals(new ArrayList(full).toString(),
                     full.toString());
    }

    /**
     * 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(int) removes and returns the object at the given index
     */
    public void testRemove_int() {
        int SIZE = 3;
        for (int i = 0; i < SIZE; i++) {
            CopyOnWriteArrayList full = populatedArray(SIZE);
            assertEquals(i, full.remove(i));
            assertEquals(SIZE - 1, full.size());
            assertFalse(full.contains(new Integer(i)));
        }
    }

    /**
     * remove(Object) removes the object if found and returns true
     */
    public void testRemove_Object() {
        int SIZE = 3;
        for (int i = 0; i < SIZE; i++) {
            CopyOnWriteArrayList full = populatedArray(SIZE);
            assertFalse(full.remove(new Integer(-42)));
            assertTrue(full.remove(new Integer(i)));
            assertEquals(SIZE - 1, full.size());
            assertFalse(full.contains(new Integer(i)));
        }
        CopyOnWriteArrayList x = new CopyOnWriteArrayList(Arrays.asList(4, 5, 6));
        assertTrue(x.remove(new Integer(6)));
        assertEquals(x, Arrays.asList(4, 5));
        assertTrue(x.remove(new Integer(4)));
        assertEquals(x, Arrays.asList(5));
        assertTrue(x.remove(new Integer(5)));
        assertEquals(x, Arrays.asList());
        assertFalse(x.remove(new Integer(5)));
    }

    /**
     * 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);

        assertNotSame(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:	1.29
Committed:	Thu May 30 03:28:55 2013 UTC (10 years, 11 months ago) by jsr166
Branch:	MAIN
Changes since 1.28:	+1 -1 lines
Log Message:	prefer assertNotSame, assertNotNull to assertTrue
#	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.ArrayList;
11	import java.util.Arrays;
12	import java.util.Collection;
13	import java.util.Collections;
14	import java.util.Iterator;
15	import java.util.LinkedList;
16	import java.util.List;
17	import java.util.ListIterator;
18	import java.util.NoSuchElementException;
19	import java.util.Vector;
20	import java.util.concurrent.CopyOnWriteArrayList;
21
22	public class CopyOnWriteArrayListTest extends JSR166TestCase {
23
24	public static void main(String[] args) {
25	junit.textui.TestRunner.run(suite());
26	}
27
28	public static Test suite() {
29	return new TestSuite(CopyOnWriteArrayListTest.class);
30	}
31
32	static CopyOnWriteArrayList<Integer> populatedArray(int n) {
33	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
34	assertTrue(a.isEmpty());
35	for (int i = 0; i < n; i++)
36	a.add(i);
37	assertFalse(a.isEmpty());
38	assertEquals(n, a.size());
39	return a;
40	}
41
42	static CopyOnWriteArrayList<Integer> populatedArray(Integer[] elements) {
43	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
44	assertTrue(a.isEmpty());
45	for (int i = 0; i < elements.length; i++)
46	a.add(elements[i]);
47	assertFalse(a.isEmpty());
48	assertEquals(elements.length, a.size());
49	return a;
50	}
51
52	/**
53	* a new list is empty
54	*/
55	public void testConstructor() {
56	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
57	assertTrue(a.isEmpty());
58	}
59
60	/**
61	* new list contains all elements of initializing array
62	*/
63	public void testConstructor2() {
64	Integer[] ints = new Integer[SIZE];
65	for (int i = 0; i < SIZE-1; ++i)
66	ints[i] = new Integer(i);
67	CopyOnWriteArrayList a = new CopyOnWriteArrayList(ints);
68	for (int i = 0; i < SIZE; ++i)
69	assertEquals(ints[i], a.get(i));
70	}
71
72	/**
73	* new list contains all elements of initializing collection
74	*/
75	public void testConstructor3() {
76	Integer[] ints = new Integer[SIZE];
77	for (int i = 0; i < SIZE-1; ++i)
78	ints[i] = new Integer(i);
79	CopyOnWriteArrayList a = new CopyOnWriteArrayList(Arrays.asList(ints));
80	for (int i = 0; i < SIZE; ++i)
81	assertEquals(ints[i], a.get(i));
82	}
83
84	/**
85	* addAll adds each element from the given collection
86	*/
87	public void testAddAll() {
88	CopyOnWriteArrayList full = populatedArray(3);
89	Vector v = new Vector();
90	v.add(three);
91	v.add(four);
92	v.add(five);
93	full.addAll(v);
94	assertEquals(6, full.size());
95	}
96
97	/**
98	* addAllAbsent adds each element from the given collection that did not
99	* already exist in the List
100	*/
101	public void testAddAllAbsent() {
102	CopyOnWriteArrayList full = populatedArray(3);
103	Vector v = new Vector();
104	v.add(three);
105	v.add(four);
106	v.add(one); // will not add this element
107	full.addAllAbsent(v);
108	assertEquals(5, full.size());
109	}
110
111	/**
112	* addIfAbsent will not add the element if it already exists in the list
113	*/
114	public void testAddIfAbsent() {
115	CopyOnWriteArrayList full = populatedArray(SIZE);
116	full.addIfAbsent(one);
117	assertEquals(SIZE, full.size());
118	}
119
120	/**
121	* addIfAbsent adds the element when it does not exist in the list
122	*/
123	public void testAddIfAbsent2() {
124	CopyOnWriteArrayList full = populatedArray(SIZE);
125	full.addIfAbsent(three);
126	assertTrue(full.contains(three));
127	}
128
129	/**
130	* clear removes all elements from the list
131	*/
132	public void testClear() {
133	CopyOnWriteArrayList full = populatedArray(SIZE);
134	full.clear();
135	assertEquals(0, full.size());
136	}
137
138	/**
139	* Cloned list is equal
140	*/
141	public void testClone() {
142	CopyOnWriteArrayList l1 = populatedArray(SIZE);
143	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
144	assertEquals(l1, l2);
145	l1.clear();
146	assertFalse(l1.equals(l2));
147	}
148
149	/**
150	* contains is true for added elements
151	*/
152	public void testContains() {
153	CopyOnWriteArrayList full = populatedArray(3);
154	assertTrue(full.contains(one));
155	assertFalse(full.contains(five));
156	}
157
158	/**
159	* adding at an index places it in the indicated index
160	*/
161	public void testAddIndex() {
162	CopyOnWriteArrayList full = populatedArray(3);
163	full.add(0, m1);
164	assertEquals(4, full.size());
165	assertEquals(m1, full.get(0));
166	assertEquals(zero, full.get(1));
167
168	full.add(2, m2);
169	assertEquals(5, full.size());
170	assertEquals(m2, full.get(2));
171	assertEquals(two, full.get(4));
172	}
173
174	/**
175	* lists with same elements are equal and have same hashCode
176	*/
177	public void testEquals() {
178	CopyOnWriteArrayList a = populatedArray(3);
179	CopyOnWriteArrayList b = populatedArray(3);
180	assertTrue(a.equals(b));
181	assertTrue(b.equals(a));
182	assertEquals(a.hashCode(), b.hashCode());
183	a.add(m1);
184	assertFalse(a.equals(b));
185	assertFalse(b.equals(a));
186	b.add(m1);
187	assertTrue(a.equals(b));
188	assertTrue(b.equals(a));
189	assertEquals(a.hashCode(), b.hashCode());
190	}
191
192	/**
193	* containsAll returns true for collection with subset of elements
194	*/
195	public void testContainsAll() {
196	CopyOnWriteArrayList full = populatedArray(3);
197	Vector v = new Vector();
198	v.add(one);
199	v.add(two);
200	assertTrue(full.containsAll(v));
201	v.add(six);
202	assertFalse(full.containsAll(v));
203	}
204
205	/**
206	* get returns the value at the given index
207	*/
208	public void testGet() {
209	CopyOnWriteArrayList full = populatedArray(3);
210	assertEquals(0, full.get(0));
211	}
212
213	/**
214	* indexOf gives the index for the given object
215	*/
216	public void testIndexOf() {
217	CopyOnWriteArrayList full = populatedArray(3);
218	assertEquals(1, full.indexOf(one));
219	assertEquals(-1, full.indexOf("puppies"));
220	}
221
222	/**
223	* indexOf gives the index based on the given index
224	* at which to start searching
225	*/
226	public void testIndexOf2() {
227	CopyOnWriteArrayList full = populatedArray(3);
228	assertEquals(1, full.indexOf(one, 0));
229	assertEquals(-1, full.indexOf(one, 2));
230	}
231
232	/**
233	* isEmpty returns true when empty, else false
234	*/
235	public void testIsEmpty() {
236	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
237	CopyOnWriteArrayList full = populatedArray(SIZE);
238	assertTrue(empty.isEmpty());
239	assertFalse(full.isEmpty());
240	}
241
242	/**
243	* iterator() returns an iterator containing the elements of the
244	* list in insertion order
245	*/
246	public void testIterator() {
247	Collection empty = new CopyOnWriteArrayList();
248	assertFalse(empty.iterator().hasNext());
249	try {
250	empty.iterator().next();
251	shouldThrow();
252	} catch (NoSuchElementException success) {}
253
254	Integer[] elements = new Integer[SIZE];
255	for (int i = 0; i < SIZE; i++)
256	elements[i] = i;
257	Collections.shuffle(Arrays.asList(elements));
258	Collection<Integer> full = populatedArray(elements);
259
260	Iterator it = full.iterator();
261	for (int j = 0; j < SIZE; j++) {
262	assertTrue(it.hasNext());
263	assertEquals(elements[j], it.next());
264	}
265	assertFalse(it.hasNext());
266	try {
267	it.next();
268	shouldThrow();
269	} catch (NoSuchElementException success) {}
270	}
271
272	/**
273	* iterator.remove throws UnsupportedOperationException
274	*/
275	public void testIteratorRemove() {
276	CopyOnWriteArrayList full = populatedArray(SIZE);
277	Iterator it = full.iterator();
278	it.next();
279	try {
280	it.remove();
281	shouldThrow();
282	} catch (UnsupportedOperationException success) {}
283	}
284
285	/**
286	* toString contains toString of elements
287	*/
288	public void testToString() {
289	assertEquals("[]", new CopyOnWriteArrayList().toString());
290	CopyOnWriteArrayList full = populatedArray(3);
291	String s = full.toString();
292	for (int i = 0; i < 3; ++i)
293	assertTrue(s.contains(String.valueOf(i)));
294	assertEquals(new ArrayList(full).toString(),
295	full.toString());
296	}
297
298	/**
299	* lastIndexOf returns the index for the given object
300	*/
301	public void testLastIndexOf1() {
302	CopyOnWriteArrayList full = populatedArray(3);
303	full.add(one);
304	full.add(three);
305	assertEquals(3, full.lastIndexOf(one));
306	assertEquals(-1, full.lastIndexOf(six));
307	}
308
309	/**
310	* lastIndexOf returns the index from the given starting point
311	*/
312	public void testLastIndexOf2() {
313	CopyOnWriteArrayList full = populatedArray(3);
314	full.add(one);
315	full.add(three);
316	assertEquals(3, full.lastIndexOf(one, 4));
317	assertEquals(-1, full.lastIndexOf(three, 3));
318	}
319
320	/**
321	* listIterator traverses all elements
322	*/
323	public void testListIterator1() {
324	CopyOnWriteArrayList full = populatedArray(SIZE);
325	ListIterator i = full.listIterator();
326	int j;
327	for (j = 0; i.hasNext(); j++)
328	assertEquals(j, i.next());
329	assertEquals(SIZE, j);
330	}
331
332	/**
333	* listIterator only returns those elements after the given index
334	*/
335	public void testListIterator2() {
336	CopyOnWriteArrayList full = populatedArray(3);
337	ListIterator i = full.listIterator(1);
338	int j;
339	for (j = 0; i.hasNext(); j++)
340	assertEquals(j+1, i.next());
341	assertEquals(2, j);
342	}
343
344	/**
345	* remove(int) removes and returns the object at the given index
346	*/
347	public void testRemove_int() {
348	int SIZE = 3;
349	for (int i = 0; i < SIZE; i++) {
350	CopyOnWriteArrayList full = populatedArray(SIZE);
351	assertEquals(i, full.remove(i));
352	assertEquals(SIZE - 1, full.size());
353	assertFalse(full.contains(new Integer(i)));
354	}
355	}
356
357	/**
358	* remove(Object) removes the object if found and returns true
359	*/
360	public void testRemove_Object() {
361	int SIZE = 3;
362	for (int i = 0; i < SIZE; i++) {
363	CopyOnWriteArrayList full = populatedArray(SIZE);
364	assertFalse(full.remove(new Integer(-42)));
365	assertTrue(full.remove(new Integer(i)));
366	assertEquals(SIZE - 1, full.size());
367	assertFalse(full.contains(new Integer(i)));
368	}
369	CopyOnWriteArrayList x = new CopyOnWriteArrayList(Arrays.asList(4, 5, 6));
370	assertTrue(x.remove(new Integer(6)));
371	assertEquals(x, Arrays.asList(4, 5));
372	assertTrue(x.remove(new Integer(4)));
373	assertEquals(x, Arrays.asList(5));
374	assertTrue(x.remove(new Integer(5)));
375	assertEquals(x, Arrays.asList());
376	assertFalse(x.remove(new Integer(5)));
377	}
378
379	/**
380	* removeAll removes all elements from the given collection
381	*/
382	public void testRemoveAll() {
383	CopyOnWriteArrayList full = populatedArray(3);
384	Vector v = new Vector();
385	v.add(one);
386	v.add(two);
387	full.removeAll(v);
388	assertEquals(1, full.size());
389	}
390
391	/**
392	* set changes the element at the given index
393	*/
394	public void testSet() {
395	CopyOnWriteArrayList full = populatedArray(3);
396	assertEquals(2, full.set(2, four));
397	assertEquals(4, full.get(2));
398	}
399
400	/**
401	* size returns the number of elements
402	*/
403	public void testSize() {
404	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
405	CopyOnWriteArrayList full = populatedArray(SIZE);
406	assertEquals(SIZE, full.size());
407	assertEquals(0, empty.size());
408	}
409
410	/**
411	* toArray() returns an Object array containing all elements from
412	* the list in insertion order
413	*/
414	public void testToArray() {
415	Object[] a = new CopyOnWriteArrayList().toArray();
416	assertTrue(Arrays.equals(new Object[0], a));
417	assertSame(Object[].class, a.getClass());
418
419	Integer[] elements = new Integer[SIZE];
420	for (int i = 0; i < SIZE; i++)
421	elements[i] = i;
422	Collections.shuffle(Arrays.asList(elements));
423	Collection<Integer> full = populatedArray(elements);
424
425	assertTrue(Arrays.equals(elements, full.toArray()));
426	assertSame(Object[].class, full.toArray().getClass());
427	}
428
429	/**
430	* toArray(Integer array) returns an Integer array containing all
431	* elements from the list in insertion order
432	*/
433	public void testToArray2() {
434	Collection empty = new CopyOnWriteArrayList();
435	Integer[] a;
436
437	a = new Integer[0];
438	assertSame(a, empty.toArray(a));
439
440	a = new Integer[SIZE/2];
441	Arrays.fill(a, 42);
442	assertSame(a, empty.toArray(a));
443	assertNull(a[0]);
444	for (int i = 1; i < a.length; i++)
445	assertEquals(42, (int) a[i]);
446
447	Integer[] elements = new Integer[SIZE];
448	for (int i = 0; i < SIZE; i++)
449	elements[i] = i;
450	Collections.shuffle(Arrays.asList(elements));
451	Collection<Integer> full = populatedArray(elements);
452
453	Arrays.fill(a, 42);
454	assertTrue(Arrays.equals(elements, full.toArray(a)));
455	for (int i = 0; i < a.length; i++)
456	assertEquals(42, (int) a[i]);
457	assertSame(Integer[].class, full.toArray(a).getClass());
458
459	a = new Integer[SIZE];
460	Arrays.fill(a, 42);
461	assertSame(a, full.toArray(a));
462	assertTrue(Arrays.equals(elements, a));
463
464	a = new Integer[2*SIZE];
465	Arrays.fill(a, 42);
466	assertSame(a, full.toArray(a));
467	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
468	assertNull(a[SIZE]);
469	for (int i = SIZE + 1; i < a.length; i++)
470	assertEquals(42, (int) a[i]);
471	}
472
473	/**
474	* sublists contains elements at indexes offset from their base
475	*/
476	public void testSubList() {
477	CopyOnWriteArrayList a = populatedArray(10);
478	assertTrue(a.subList(1,1).isEmpty());
479	for (int j = 0; j < 9; ++j) {
480	for (int i = j ; i < 10; ++i) {
481	List b = a.subList(j,i);
482	for (int k = j; k < i; ++k) {
483	assertEquals(new Integer(k), b.get(k-j));
484	}
485	}
486	}
487
488	List s = a.subList(2, 5);
489	assertEquals(3, s.size());
490	s.set(2, m1);
491	assertEquals(a.get(4), m1);
492	s.clear();
493	assertEquals(7, a.size());
494	}
495
496	// Exception tests
497
498	/**
499	* toArray throws an ArrayStoreException when the given array
500	* can not store the objects inside the list
501	*/
502	public void testToArray_ArrayStoreException() {
503	try {
504	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
505	c.add("zfasdfsdf");
506	c.add("asdadasd");
507	c.toArray(new Long[5]);
508	shouldThrow();
509	} catch (ArrayStoreException success) {}
510	}
511
512	/**
513	* get throws an IndexOutOfBoundsException on a negative index
514	*/
515	public void testGet1_IndexOutOfBoundsException() {
516	try {
517	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
518	c.get(-1);
519	shouldThrow();
520	} catch (IndexOutOfBoundsException success) {}
521	}
522
523	/**
524	* get throws an IndexOutOfBoundsException on a too high index
525	*/
526	public void testGet2_IndexOutOfBoundsException() {
527	try {
528	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
529	c.add("asdasd");
530	c.add("asdad");
531	c.get(100);
532	shouldThrow();
533	} catch (IndexOutOfBoundsException success) {}
534	}
535
536	/**
537	* set throws an IndexOutOfBoundsException on a negative index
538	*/
539	public void testSet1_IndexOutOfBoundsException() {
540	try {
541	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
542	c.set(-1,"qwerty");
543	shouldThrow();
544	} catch (IndexOutOfBoundsException success) {}
545	}
546
547	/**
548	* set throws an IndexOutOfBoundsException on a too high index
549	*/
550	public void testSet2() {
551	try {
552	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
553	c.add("asdasd");
554	c.add("asdad");
555	c.set(100, "qwerty");
556	shouldThrow();
557	} catch (IndexOutOfBoundsException success) {}
558	}
559
560	/**
561	* add throws an IndexOutOfBoundsException on a negative index
562	*/
563	public void testAdd1_IndexOutOfBoundsException() {
564	try {
565	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
566	c.add(-1,"qwerty");
567	shouldThrow();
568	} catch (IndexOutOfBoundsException success) {}
569	}
570
571	/**
572	* add throws an IndexOutOfBoundsException on a too high index
573	*/
574	public void testAdd2_IndexOutOfBoundsException() {
575	try {
576	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
577	c.add("asdasd");
578	c.add("asdasdasd");
579	c.add(100, "qwerty");
580	shouldThrow();
581	} catch (IndexOutOfBoundsException success) {}
582	}
583
584	/**
585	* remove throws an IndexOutOfBoundsException on a negative index
586	*/
587	public void testRemove1_IndexOutOfBounds() {
588	try {
589	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
590	c.remove(-1);
591	shouldThrow();
592	} catch (IndexOutOfBoundsException success) {}
593	}
594
595	/**
596	* remove throws an IndexOutOfBoundsException on a too high index
597	*/
598	public void testRemove2_IndexOutOfBounds() {
599	try {
600	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
601	c.add("asdasd");
602	c.add("adasdasd");
603	c.remove(100);
604	shouldThrow();
605	} catch (IndexOutOfBoundsException success) {}
606	}
607
608	/**
609	* addAll throws an IndexOutOfBoundsException on a negative index
610	*/
611	public void testAddAll1_IndexOutOfBoundsException() {
612	try {
613	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
614	c.addAll(-1,new LinkedList());
615	shouldThrow();
616	} catch (IndexOutOfBoundsException success) {}
617	}
618
619	/**
620	* addAll throws an IndexOutOfBoundsException on a too high index
621	*/
622	public void testAddAll2_IndexOutOfBoundsException() {
623	try {
624	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
625	c.add("asdasd");
626	c.add("asdasdasd");
627	c.addAll(100, new LinkedList());
628	shouldThrow();
629	} catch (IndexOutOfBoundsException success) {}
630	}
631
632	/**
633	* listIterator throws an IndexOutOfBoundsException on a negative index
634	*/
635	public void testListIterator1_IndexOutOfBoundsException() {
636	try {
637	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
638	c.listIterator(-1);
639	shouldThrow();
640	} catch (IndexOutOfBoundsException success) {}
641	}
642
643	/**
644	* listIterator throws an IndexOutOfBoundsException on a too high index
645	*/
646	public void testListIterator2_IndexOutOfBoundsException() {
647	try {
648	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
649	c.add("adasd");
650	c.add("asdasdas");
651	c.listIterator(100);
652	shouldThrow();
653	} catch (IndexOutOfBoundsException success) {}
654	}
655
656	/**
657	* subList throws an IndexOutOfBoundsException on a negative index
658	*/
659	public void testSubList1_IndexOutOfBoundsException() {
660	try {
661	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
662	c.subList(-1,100);
663	shouldThrow();
664	} catch (IndexOutOfBoundsException success) {}
665	}
666
667	/**
668	* subList throws an IndexOutOfBoundsException on a too high index
669	*/
670	public void testSubList2_IndexOutOfBoundsException() {
671	try {
672	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
673	c.add("asdasd");
674	c.subList(1,100);
675	shouldThrow();
676	} catch (IndexOutOfBoundsException success) {}
677	}
678
679	/**
680	* subList throws IndexOutOfBoundsException when the second index
681	* is lower then the first
682	*/
683	public void testSubList3_IndexOutOfBoundsException() {
684	try {
685	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
686	c.subList(3,1);
687	shouldThrow();
688	} catch (IndexOutOfBoundsException success) {}
689	}
690
691	/**
692	* a deserialized serialized list is equal
693	*/
694	public void testSerialization() throws Exception {
695	List x = populatedArray(SIZE);
696	List y = serialClone(x);
697
698	assertNotSame(x, y);
699	assertEquals(x.size(), y.size());
700	assertEquals(x.toString(), y.toString());
701	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
702	assertEquals(x, y);
703	assertEquals(y, x);
704	while (!x.isEmpty()) {
705	assertFalse(y.isEmpty());
706	assertEquals(x.remove(0), y.remove(0));
707	}
708	assertTrue(y.isEmpty());
709	}
710
711	}