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 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;

import junit.framework.Test;
import junit.framework.TestSuite;

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() {
        CopyOnWriteArrayList c = new CopyOnWriteArrayList();
        c.add("zfasdfsdf");
        c.add("asdadasd");
        try {
            c.toArray(new Long[5]);
            shouldThrow();
        } catch (ArrayStoreException success) {}
    }

    /**
     * get throws an IndexOutOfBoundsException on a negative index
     */
    public void testGet1_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.get(-1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * get throws an IndexOutOfBoundsException on a too high index
     */
    public void testGet2_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.get(list.size());
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * set throws an IndexOutOfBoundsException on a negative index
     */
    public void testSet1_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.set(-1, "qwerty");
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * set throws an IndexOutOfBoundsException on a too high index
     */
    public void testSet2() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.set(list.size(), "qwerty");
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * add throws an IndexOutOfBoundsException on a negative index
     */
    public void testAdd1_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.add(-1, "qwerty");
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * add throws an IndexOutOfBoundsException on a too high index
     */
    public void testAdd2_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.add(list.size() + 1, "qwerty");
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * remove throws an IndexOutOfBoundsException on a negative index
     */
    public void testRemove1_IndexOutOfBounds() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.remove(-1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * remove throws an IndexOutOfBoundsException on a too high index
     */
    public void testRemove2_IndexOutOfBounds() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.remove(list.size());
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * addAll throws an IndexOutOfBoundsException on a negative index
     */
    public void testAddAll1_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.addAll(-1, new LinkedList());
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * addAll throws an IndexOutOfBoundsException on a too high index
     */
    public void testAddAll2_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.addAll(list.size() + 1, new LinkedList());
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * listIterator throws an IndexOutOfBoundsException on a negative index
     */
    public void testListIterator1_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.listIterator(-1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * listIterator throws an IndexOutOfBoundsException on a too high index
     */
    public void testListIterator2_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.listIterator(list.size() + 1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * subList throws an IndexOutOfBoundsException on a negative index
     */
    public void testSubList1_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.subList(-1, list.size());
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * subList throws an IndexOutOfBoundsException on a too high index
     */
    public void testSubList2_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.subList(0, list.size() + 1);
                shouldThrow();
            } catch (IndexOutOfBoundsException success) {}
        }
    }

    /**
     * subList throws IndexOutOfBoundsException when the second index
     * is lower then the first
     */
    public void testSubList3_IndexOutOfBoundsException() {
        CopyOnWriteArrayList c = populatedArray(5);
        List[] lists = { c, c.subList(1, c.size() - 1) };
        for (List list : lists) {
            try {
                list.subList(list.size() - 1, 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:	1.31
Committed:	Wed Dec 31 19:05:42 2014 UTC (9 years, 4 months ago) by jsr166
Branch:	MAIN
Changes since 1.30:	+3 -1 lines
Log Message:	no wildcard imports
#	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 java.util.ArrayList;
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.NoSuchElementException;
18	import java.util.Vector;
19	import java.util.concurrent.CopyOnWriteArrayList;
20
21	import junit.framework.Test;
22	import junit.framework.TestSuite;
23
24	public class CopyOnWriteArrayListTest extends JSR166TestCase {
25
26	public static void main(String[] args) {
27	junit.textui.TestRunner.run(suite());
28	}
29
30	public static Test suite() {
31	return new TestSuite(CopyOnWriteArrayListTest.class);
32	}
33
34	static CopyOnWriteArrayList<Integer> populatedArray(int n) {
35	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
36	assertTrue(a.isEmpty());
37	for (int i = 0; i < n; i++)
38	a.add(i);
39	assertFalse(a.isEmpty());
40	assertEquals(n, a.size());
41	return a;
42	}
43
44	static CopyOnWriteArrayList<Integer> populatedArray(Integer[] elements) {
45	CopyOnWriteArrayList<Integer> a = new CopyOnWriteArrayList<Integer>();
46	assertTrue(a.isEmpty());
47	for (int i = 0; i < elements.length; i++)
48	a.add(elements[i]);
49	assertFalse(a.isEmpty());
50	assertEquals(elements.length, a.size());
51	return a;
52	}
53
54	/**
55	* a new list is empty
56	*/
57	public void testConstructor() {
58	CopyOnWriteArrayList a = new CopyOnWriteArrayList();
59	assertTrue(a.isEmpty());
60	}
61
62	/**
63	* new list contains all elements of initializing array
64	*/
65	public void testConstructor2() {
66	Integer[] ints = new Integer[SIZE];
67	for (int i = 0; i < SIZE-1; ++i)
68	ints[i] = new Integer(i);
69	CopyOnWriteArrayList a = new CopyOnWriteArrayList(ints);
70	for (int i = 0; i < SIZE; ++i)
71	assertEquals(ints[i], a.get(i));
72	}
73
74	/**
75	* new list contains all elements of initializing collection
76	*/
77	public void testConstructor3() {
78	Integer[] ints = new Integer[SIZE];
79	for (int i = 0; i < SIZE-1; ++i)
80	ints[i] = new Integer(i);
81	CopyOnWriteArrayList a = new CopyOnWriteArrayList(Arrays.asList(ints));
82	for (int i = 0; i < SIZE; ++i)
83	assertEquals(ints[i], a.get(i));
84	}
85
86	/**
87	* addAll adds each element from the given collection
88	*/
89	public void testAddAll() {
90	CopyOnWriteArrayList full = populatedArray(3);
91	Vector v = new Vector();
92	v.add(three);
93	v.add(four);
94	v.add(five);
95	full.addAll(v);
96	assertEquals(6, full.size());
97	}
98
99	/**
100	* addAllAbsent adds each element from the given collection that did not
101	* already exist in the List
102	*/
103	public void testAddAllAbsent() {
104	CopyOnWriteArrayList full = populatedArray(3);
105	Vector v = new Vector();
106	v.add(three);
107	v.add(four);
108	v.add(one); // will not add this element
109	full.addAllAbsent(v);
110	assertEquals(5, full.size());
111	}
112
113	/**
114	* addIfAbsent will not add the element if it already exists in the list
115	*/
116	public void testAddIfAbsent() {
117	CopyOnWriteArrayList full = populatedArray(SIZE);
118	full.addIfAbsent(one);
119	assertEquals(SIZE, full.size());
120	}
121
122	/**
123	* addIfAbsent adds the element when it does not exist in the list
124	*/
125	public void testAddIfAbsent2() {
126	CopyOnWriteArrayList full = populatedArray(SIZE);
127	full.addIfAbsent(three);
128	assertTrue(full.contains(three));
129	}
130
131	/**
132	* clear removes all elements from the list
133	*/
134	public void testClear() {
135	CopyOnWriteArrayList full = populatedArray(SIZE);
136	full.clear();
137	assertEquals(0, full.size());
138	}
139
140	/**
141	* Cloned list is equal
142	*/
143	public void testClone() {
144	CopyOnWriteArrayList l1 = populatedArray(SIZE);
145	CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone());
146	assertEquals(l1, l2);
147	l1.clear();
148	assertFalse(l1.equals(l2));
149	}
150
151	/**
152	* contains is true for added elements
153	*/
154	public void testContains() {
155	CopyOnWriteArrayList full = populatedArray(3);
156	assertTrue(full.contains(one));
157	assertFalse(full.contains(five));
158	}
159
160	/**
161	* adding at an index places it in the indicated index
162	*/
163	public void testAddIndex() {
164	CopyOnWriteArrayList full = populatedArray(3);
165	full.add(0, m1);
166	assertEquals(4, full.size());
167	assertEquals(m1, full.get(0));
168	assertEquals(zero, full.get(1));
169
170	full.add(2, m2);
171	assertEquals(5, full.size());
172	assertEquals(m2, full.get(2));
173	assertEquals(two, full.get(4));
174	}
175
176	/**
177	* lists with same elements are equal and have same hashCode
178	*/
179	public void testEquals() {
180	CopyOnWriteArrayList a = populatedArray(3);
181	CopyOnWriteArrayList b = populatedArray(3);
182	assertTrue(a.equals(b));
183	assertTrue(b.equals(a));
184	assertEquals(a.hashCode(), b.hashCode());
185	a.add(m1);
186	assertFalse(a.equals(b));
187	assertFalse(b.equals(a));
188	b.add(m1);
189	assertTrue(a.equals(b));
190	assertTrue(b.equals(a));
191	assertEquals(a.hashCode(), b.hashCode());
192	}
193
194	/**
195	* containsAll returns true for collection with subset of elements
196	*/
197	public void testContainsAll() {
198	CopyOnWriteArrayList full = populatedArray(3);
199	Vector v = new Vector();
200	v.add(one);
201	v.add(two);
202	assertTrue(full.containsAll(v));
203	v.add(six);
204	assertFalse(full.containsAll(v));
205	}
206
207	/**
208	* get returns the value at the given index
209	*/
210	public void testGet() {
211	CopyOnWriteArrayList full = populatedArray(3);
212	assertEquals(0, full.get(0));
213	}
214
215	/**
216	* indexOf gives the index for the given object
217	*/
218	public void testIndexOf() {
219	CopyOnWriteArrayList full = populatedArray(3);
220	assertEquals(1, full.indexOf(one));
221	assertEquals(-1, full.indexOf("puppies"));
222	}
223
224	/**
225	* indexOf gives the index based on the given index
226	* at which to start searching
227	*/
228	public void testIndexOf2() {
229	CopyOnWriteArrayList full = populatedArray(3);
230	assertEquals(1, full.indexOf(one, 0));
231	assertEquals(-1, full.indexOf(one, 2));
232	}
233
234	/**
235	* isEmpty returns true when empty, else false
236	*/
237	public void testIsEmpty() {
238	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
239	CopyOnWriteArrayList full = populatedArray(SIZE);
240	assertTrue(empty.isEmpty());
241	assertFalse(full.isEmpty());
242	}
243
244	/**
245	* iterator() returns an iterator containing the elements of the
246	* list in insertion order
247	*/
248	public void testIterator() {
249	Collection empty = new CopyOnWriteArrayList();
250	assertFalse(empty.iterator().hasNext());
251	try {
252	empty.iterator().next();
253	shouldThrow();
254	} catch (NoSuchElementException success) {}
255
256	Integer[] elements = new Integer[SIZE];
257	for (int i = 0; i < SIZE; i++)
258	elements[i] = i;
259	Collections.shuffle(Arrays.asList(elements));
260	Collection<Integer> full = populatedArray(elements);
261
262	Iterator it = full.iterator();
263	for (int j = 0; j < SIZE; j++) {
264	assertTrue(it.hasNext());
265	assertEquals(elements[j], it.next());
266	}
267	assertFalse(it.hasNext());
268	try {
269	it.next();
270	shouldThrow();
271	} catch (NoSuchElementException success) {}
272	}
273
274	/**
275	* iterator.remove throws UnsupportedOperationException
276	*/
277	public void testIteratorRemove() {
278	CopyOnWriteArrayList full = populatedArray(SIZE);
279	Iterator it = full.iterator();
280	it.next();
281	try {
282	it.remove();
283	shouldThrow();
284	} catch (UnsupportedOperationException success) {}
285	}
286
287	/**
288	* toString contains toString of elements
289	*/
290	public void testToString() {
291	assertEquals("[]", new CopyOnWriteArrayList().toString());
292	CopyOnWriteArrayList full = populatedArray(3);
293	String s = full.toString();
294	for (int i = 0; i < 3; ++i)
295	assertTrue(s.contains(String.valueOf(i)));
296	assertEquals(new ArrayList(full).toString(),
297	full.toString());
298	}
299
300	/**
301	* lastIndexOf returns the index for the given object
302	*/
303	public void testLastIndexOf1() {
304	CopyOnWriteArrayList full = populatedArray(3);
305	full.add(one);
306	full.add(three);
307	assertEquals(3, full.lastIndexOf(one));
308	assertEquals(-1, full.lastIndexOf(six));
309	}
310
311	/**
312	* lastIndexOf returns the index from the given starting point
313	*/
314	public void testLastIndexOf2() {
315	CopyOnWriteArrayList full = populatedArray(3);
316	full.add(one);
317	full.add(three);
318	assertEquals(3, full.lastIndexOf(one, 4));
319	assertEquals(-1, full.lastIndexOf(three, 3));
320	}
321
322	/**
323	* listIterator traverses all elements
324	*/
325	public void testListIterator1() {
326	CopyOnWriteArrayList full = populatedArray(SIZE);
327	ListIterator i = full.listIterator();
328	int j;
329	for (j = 0; i.hasNext(); j++)
330	assertEquals(j, i.next());
331	assertEquals(SIZE, j);
332	}
333
334	/**
335	* listIterator only returns those elements after the given index
336	*/
337	public void testListIterator2() {
338	CopyOnWriteArrayList full = populatedArray(3);
339	ListIterator i = full.listIterator(1);
340	int j;
341	for (j = 0; i.hasNext(); j++)
342	assertEquals(j+1, i.next());
343	assertEquals(2, j);
344	}
345
346	/**
347	* remove(int) removes and returns the object at the given index
348	*/
349	public void testRemove_int() {
350	int SIZE = 3;
351	for (int i = 0; i < SIZE; i++) {
352	CopyOnWriteArrayList full = populatedArray(SIZE);
353	assertEquals(i, full.remove(i));
354	assertEquals(SIZE - 1, full.size());
355	assertFalse(full.contains(new Integer(i)));
356	}
357	}
358
359	/**
360	* remove(Object) removes the object if found and returns true
361	*/
362	public void testRemove_Object() {
363	int SIZE = 3;
364	for (int i = 0; i < SIZE; i++) {
365	CopyOnWriteArrayList full = populatedArray(SIZE);
366	assertFalse(full.remove(new Integer(-42)));
367	assertTrue(full.remove(new Integer(i)));
368	assertEquals(SIZE - 1, full.size());
369	assertFalse(full.contains(new Integer(i)));
370	}
371	CopyOnWriteArrayList x = new CopyOnWriteArrayList(Arrays.asList(4, 5, 6));
372	assertTrue(x.remove(new Integer(6)));
373	assertEquals(x, Arrays.asList(4, 5));
374	assertTrue(x.remove(new Integer(4)));
375	assertEquals(x, Arrays.asList(5));
376	assertTrue(x.remove(new Integer(5)));
377	assertEquals(x, Arrays.asList());
378	assertFalse(x.remove(new Integer(5)));
379	}
380
381	/**
382	* removeAll removes all elements from the given collection
383	*/
384	public void testRemoveAll() {
385	CopyOnWriteArrayList full = populatedArray(3);
386	Vector v = new Vector();
387	v.add(one);
388	v.add(two);
389	full.removeAll(v);
390	assertEquals(1, full.size());
391	}
392
393	/**
394	* set changes the element at the given index
395	*/
396	public void testSet() {
397	CopyOnWriteArrayList full = populatedArray(3);
398	assertEquals(2, full.set(2, four));
399	assertEquals(4, full.get(2));
400	}
401
402	/**
403	* size returns the number of elements
404	*/
405	public void testSize() {
406	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
407	CopyOnWriteArrayList full = populatedArray(SIZE);
408	assertEquals(SIZE, full.size());
409	assertEquals(0, empty.size());
410	}
411
412	/**
413	* toArray() returns an Object array containing all elements from
414	* the list in insertion order
415	*/
416	public void testToArray() {
417	Object[] a = new CopyOnWriteArrayList().toArray();
418	assertTrue(Arrays.equals(new Object[0], a));
419	assertSame(Object[].class, a.getClass());
420
421	Integer[] elements = new Integer[SIZE];
422	for (int i = 0; i < SIZE; i++)
423	elements[i] = i;
424	Collections.shuffle(Arrays.asList(elements));
425	Collection<Integer> full = populatedArray(elements);
426
427	assertTrue(Arrays.equals(elements, full.toArray()));
428	assertSame(Object[].class, full.toArray().getClass());
429	}
430
431	/**
432	* toArray(Integer array) returns an Integer array containing all
433	* elements from the list in insertion order
434	*/
435	public void testToArray2() {
436	Collection empty = new CopyOnWriteArrayList();
437	Integer[] a;
438
439	a = new Integer[0];
440	assertSame(a, empty.toArray(a));
441
442	a = new Integer[SIZE/2];
443	Arrays.fill(a, 42);
444	assertSame(a, empty.toArray(a));
445	assertNull(a[0]);
446	for (int i = 1; i < a.length; i++)
447	assertEquals(42, (int) a[i]);
448
449	Integer[] elements = new Integer[SIZE];
450	for (int i = 0; i < SIZE; i++)
451	elements[i] = i;
452	Collections.shuffle(Arrays.asList(elements));
453	Collection<Integer> full = populatedArray(elements);
454
455	Arrays.fill(a, 42);
456	assertTrue(Arrays.equals(elements, full.toArray(a)));
457	for (int i = 0; i < a.length; i++)
458	assertEquals(42, (int) a[i]);
459	assertSame(Integer[].class, full.toArray(a).getClass());
460
461	a = new Integer[SIZE];
462	Arrays.fill(a, 42);
463	assertSame(a, full.toArray(a));
464	assertTrue(Arrays.equals(elements, a));
465
466	a = new Integer[2*SIZE];
467	Arrays.fill(a, 42);
468	assertSame(a, full.toArray(a));
469	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
470	assertNull(a[SIZE]);
471	for (int i = SIZE + 1; i < a.length; i++)
472	assertEquals(42, (int) a[i]);
473	}
474
475	/**
476	* sublists contains elements at indexes offset from their base
477	*/
478	public void testSubList() {
479	CopyOnWriteArrayList a = populatedArray(10);
480	assertTrue(a.subList(1,1).isEmpty());
481	for (int j = 0; j < 9; ++j) {
482	for (int i = j ; i < 10; ++i) {
483	List b = a.subList(j,i);
484	for (int k = j; k < i; ++k) {
485	assertEquals(new Integer(k), b.get(k-j));
486	}
487	}
488	}
489
490	List s = a.subList(2, 5);
491	assertEquals(3, s.size());
492	s.set(2, m1);
493	assertEquals(a.get(4), m1);
494	s.clear();
495	assertEquals(7, a.size());
496	}
497
498	// Exception tests
499
500	/**
501	* toArray throws an ArrayStoreException when the given array
502	* can not store the objects inside the list
503	*/
504	public void testToArray_ArrayStoreException() {
505	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
506	c.add("zfasdfsdf");
507	c.add("asdadasd");
508	try {
509	c.toArray(new Long[5]);
510	shouldThrow();
511	} catch (ArrayStoreException success) {}
512	}
513
514	/**
515	* get throws an IndexOutOfBoundsException on a negative index
516	*/
517	public void testGet1_IndexOutOfBoundsException() {
518	CopyOnWriteArrayList c = populatedArray(5);
519	List[] lists = { c, c.subList(1, c.size() - 1) };
520	for (List list : lists) {
521	try {
522	list.get(-1);
523	shouldThrow();
524	} catch (IndexOutOfBoundsException success) {}
525	}
526	}
527
528	/**
529	* get throws an IndexOutOfBoundsException on a too high index
530	*/
531	public void testGet2_IndexOutOfBoundsException() {
532	CopyOnWriteArrayList c = populatedArray(5);
533	List[] lists = { c, c.subList(1, c.size() - 1) };
534	for (List list : lists) {
535	try {
536	list.get(list.size());
537	shouldThrow();
538	} catch (IndexOutOfBoundsException success) {}
539	}
540	}
541
542	/**
543	* set throws an IndexOutOfBoundsException on a negative index
544	*/
545	public void testSet1_IndexOutOfBoundsException() {
546	CopyOnWriteArrayList c = populatedArray(5);
547	List[] lists = { c, c.subList(1, c.size() - 1) };
548	for (List list : lists) {
549	try {
550	list.set(-1, "qwerty");
551	shouldThrow();
552	} catch (IndexOutOfBoundsException success) {}
553	}
554	}
555
556	/**
557	* set throws an IndexOutOfBoundsException on a too high index
558	*/
559	public void testSet2() {
560	CopyOnWriteArrayList c = populatedArray(5);
561	List[] lists = { c, c.subList(1, c.size() - 1) };
562	for (List list : lists) {
563	try {
564	list.set(list.size(), "qwerty");
565	shouldThrow();
566	} catch (IndexOutOfBoundsException success) {}
567	}
568	}
569
570	/**
571	* add throws an IndexOutOfBoundsException on a negative index
572	*/
573	public void testAdd1_IndexOutOfBoundsException() {
574	CopyOnWriteArrayList c = populatedArray(5);
575	List[] lists = { c, c.subList(1, c.size() - 1) };
576	for (List list : lists) {
577	try {
578	list.add(-1, "qwerty");
579	shouldThrow();
580	} catch (IndexOutOfBoundsException success) {}
581	}
582	}
583
584	/**
585	* add throws an IndexOutOfBoundsException on a too high index
586	*/
587	public void testAdd2_IndexOutOfBoundsException() {
588	CopyOnWriteArrayList c = populatedArray(5);
589	List[] lists = { c, c.subList(1, c.size() - 1) };
590	for (List list : lists) {
591	try {
592	list.add(list.size() + 1, "qwerty");
593	shouldThrow();
594	} catch (IndexOutOfBoundsException success) {}
595	}
596	}
597
598	/**
599	* remove throws an IndexOutOfBoundsException on a negative index
600	*/
601	public void testRemove1_IndexOutOfBounds() {
602	CopyOnWriteArrayList c = populatedArray(5);
603	List[] lists = { c, c.subList(1, c.size() - 1) };
604	for (List list : lists) {
605	try {
606	list.remove(-1);
607	shouldThrow();
608	} catch (IndexOutOfBoundsException success) {}
609	}
610	}
611
612	/**
613	* remove throws an IndexOutOfBoundsException on a too high index
614	*/
615	public void testRemove2_IndexOutOfBounds() {
616	CopyOnWriteArrayList c = populatedArray(5);
617	List[] lists = { c, c.subList(1, c.size() - 1) };
618	for (List list : lists) {
619	try {
620	list.remove(list.size());
621	shouldThrow();
622	} catch (IndexOutOfBoundsException success) {}
623	}
624	}
625
626	/**
627	* addAll throws an IndexOutOfBoundsException on a negative index
628	*/
629	public void testAddAll1_IndexOutOfBoundsException() {
630	CopyOnWriteArrayList c = populatedArray(5);
631	List[] lists = { c, c.subList(1, c.size() - 1) };
632	for (List list : lists) {
633	try {
634	list.addAll(-1, new LinkedList());
635	shouldThrow();
636	} catch (IndexOutOfBoundsException success) {}
637	}
638	}
639
640	/**
641	* addAll throws an IndexOutOfBoundsException on a too high index
642	*/
643	public void testAddAll2_IndexOutOfBoundsException() {
644	CopyOnWriteArrayList c = populatedArray(5);
645	List[] lists = { c, c.subList(1, c.size() - 1) };
646	for (List list : lists) {
647	try {
648	list.addAll(list.size() + 1, new LinkedList());
649	shouldThrow();
650	} catch (IndexOutOfBoundsException success) {}
651	}
652	}
653
654	/**
655	* listIterator throws an IndexOutOfBoundsException on a negative index
656	*/
657	public void testListIterator1_IndexOutOfBoundsException() {
658	CopyOnWriteArrayList c = populatedArray(5);
659	List[] lists = { c, c.subList(1, c.size() - 1) };
660	for (List list : lists) {
661	try {
662	list.listIterator(-1);
663	shouldThrow();
664	} catch (IndexOutOfBoundsException success) {}
665	}
666	}
667
668	/**
669	* listIterator throws an IndexOutOfBoundsException on a too high index
670	*/
671	public void testListIterator2_IndexOutOfBoundsException() {
672	CopyOnWriteArrayList c = populatedArray(5);
673	List[] lists = { c, c.subList(1, c.size() - 1) };
674	for (List list : lists) {
675	try {
676	list.listIterator(list.size() + 1);
677	shouldThrow();
678	} catch (IndexOutOfBoundsException success) {}
679	}
680	}
681
682	/**
683	* subList throws an IndexOutOfBoundsException on a negative index
684	*/
685	public void testSubList1_IndexOutOfBoundsException() {
686	CopyOnWriteArrayList c = populatedArray(5);
687	List[] lists = { c, c.subList(1, c.size() - 1) };
688	for (List list : lists) {
689	try {
690	list.subList(-1, list.size());
691	shouldThrow();
692	} catch (IndexOutOfBoundsException success) {}
693	}
694	}
695
696	/**
697	* subList throws an IndexOutOfBoundsException on a too high index
698	*/
699	public void testSubList2_IndexOutOfBoundsException() {
700	CopyOnWriteArrayList c = populatedArray(5);
701	List[] lists = { c, c.subList(1, c.size() - 1) };
702	for (List list : lists) {
703	try {
704	list.subList(0, list.size() + 1);
705	shouldThrow();
706	} catch (IndexOutOfBoundsException success) {}
707	}
708	}
709
710	/**
711	* subList throws IndexOutOfBoundsException when the second index
712	* is lower then the first
713	*/
714	public void testSubList3_IndexOutOfBoundsException() {
715	CopyOnWriteArrayList c = populatedArray(5);
716	List[] lists = { c, c.subList(1, c.size() - 1) };
717	for (List list : lists) {
718	try {
719	list.subList(list.size() - 1, 1);
720	shouldThrow();
721	} catch (IndexOutOfBoundsException success) {}
722	}
723	}
724
725	/**
726	* a deserialized serialized list is equal
727	*/
728	public void testSerialization() throws Exception {
729	List x = populatedArray(SIZE);
730	List y = serialClone(x);
731
732	assertNotSame(x, y);
733	assertEquals(x.size(), y.size());
734	assertEquals(x.toString(), y.toString());
735	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
736	assertEquals(x, y);
737	assertEquals(y, x);
738	while (!x.isEmpty()) {
739	assertFalse(y.isEmpty());
740	assertEquals(x.remove(0), y.remove(0));
741	}
742	assertTrue(y.isEmpty());
743	}
744
745	}