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());
        }
        assertIteratorExhausted(it);
    }

    /**
     * iterator of empty collection has no elements
     */
    public void testEmptyIterator() {
        Collection c = new CopyOnWriteArrayList();
        assertIteratorExhausted(c.iterator());
    }

    /**
     * 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:	1.32
Committed:	Sat Jan 17 22:55:06 2015 UTC (9 years, 4 months ago) by jsr166
Branch:	MAIN
Changes since 1.31:	+9 -5 lines
Log Message:	add more tests of exhausted iterators
#	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	assertIteratorExhausted(it);
268	}
269
270	/**
271	* iterator of empty collection has no elements
272	*/
273	public void testEmptyIterator() {
274	Collection c = new CopyOnWriteArrayList();
275	assertIteratorExhausted(c.iterator());
276	}
277
278	/**
279	* iterator.remove throws UnsupportedOperationException
280	*/
281	public void testIteratorRemove() {
282	CopyOnWriteArrayList full = populatedArray(SIZE);
283	Iterator it = full.iterator();
284	it.next();
285	try {
286	it.remove();
287	shouldThrow();
288	} catch (UnsupportedOperationException success) {}
289	}
290
291	/**
292	* toString contains toString of elements
293	*/
294	public void testToString() {
295	assertEquals("[]", new CopyOnWriteArrayList().toString());
296	CopyOnWriteArrayList full = populatedArray(3);
297	String s = full.toString();
298	for (int i = 0; i < 3; ++i)
299	assertTrue(s.contains(String.valueOf(i)));
300	assertEquals(new ArrayList(full).toString(),
301	full.toString());
302	}
303
304	/**
305	* lastIndexOf returns the index for the given object
306	*/
307	public void testLastIndexOf1() {
308	CopyOnWriteArrayList full = populatedArray(3);
309	full.add(one);
310	full.add(three);
311	assertEquals(3, full.lastIndexOf(one));
312	assertEquals(-1, full.lastIndexOf(six));
313	}
314
315	/**
316	* lastIndexOf returns the index from the given starting point
317	*/
318	public void testLastIndexOf2() {
319	CopyOnWriteArrayList full = populatedArray(3);
320	full.add(one);
321	full.add(three);
322	assertEquals(3, full.lastIndexOf(one, 4));
323	assertEquals(-1, full.lastIndexOf(three, 3));
324	}
325
326	/**
327	* listIterator traverses all elements
328	*/
329	public void testListIterator1() {
330	CopyOnWriteArrayList full = populatedArray(SIZE);
331	ListIterator i = full.listIterator();
332	int j;
333	for (j = 0; i.hasNext(); j++)
334	assertEquals(j, i.next());
335	assertEquals(SIZE, j);
336	}
337
338	/**
339	* listIterator only returns those elements after the given index
340	*/
341	public void testListIterator2() {
342	CopyOnWriteArrayList full = populatedArray(3);
343	ListIterator i = full.listIterator(1);
344	int j;
345	for (j = 0; i.hasNext(); j++)
346	assertEquals(j+1, i.next());
347	assertEquals(2, j);
348	}
349
350	/**
351	* remove(int) removes and returns the object at the given index
352	*/
353	public void testRemove_int() {
354	int SIZE = 3;
355	for (int i = 0; i < SIZE; i++) {
356	CopyOnWriteArrayList full = populatedArray(SIZE);
357	assertEquals(i, full.remove(i));
358	assertEquals(SIZE - 1, full.size());
359	assertFalse(full.contains(new Integer(i)));
360	}
361	}
362
363	/**
364	* remove(Object) removes the object if found and returns true
365	*/
366	public void testRemove_Object() {
367	int SIZE = 3;
368	for (int i = 0; i < SIZE; i++) {
369	CopyOnWriteArrayList full = populatedArray(SIZE);
370	assertFalse(full.remove(new Integer(-42)));
371	assertTrue(full.remove(new Integer(i)));
372	assertEquals(SIZE - 1, full.size());
373	assertFalse(full.contains(new Integer(i)));
374	}
375	CopyOnWriteArrayList x = new CopyOnWriteArrayList(Arrays.asList(4, 5, 6));
376	assertTrue(x.remove(new Integer(6)));
377	assertEquals(x, Arrays.asList(4, 5));
378	assertTrue(x.remove(new Integer(4)));
379	assertEquals(x, Arrays.asList(5));
380	assertTrue(x.remove(new Integer(5)));
381	assertEquals(x, Arrays.asList());
382	assertFalse(x.remove(new Integer(5)));
383	}
384
385	/**
386	* removeAll removes all elements from the given collection
387	*/
388	public void testRemoveAll() {
389	CopyOnWriteArrayList full = populatedArray(3);
390	Vector v = new Vector();
391	v.add(one);
392	v.add(two);
393	full.removeAll(v);
394	assertEquals(1, full.size());
395	}
396
397	/**
398	* set changes the element at the given index
399	*/
400	public void testSet() {
401	CopyOnWriteArrayList full = populatedArray(3);
402	assertEquals(2, full.set(2, four));
403	assertEquals(4, full.get(2));
404	}
405
406	/**
407	* size returns the number of elements
408	*/
409	public void testSize() {
410	CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
411	CopyOnWriteArrayList full = populatedArray(SIZE);
412	assertEquals(SIZE, full.size());
413	assertEquals(0, empty.size());
414	}
415
416	/**
417	* toArray() returns an Object array containing all elements from
418	* the list in insertion order
419	*/
420	public void testToArray() {
421	Object[] a = new CopyOnWriteArrayList().toArray();
422	assertTrue(Arrays.equals(new Object[0], a));
423	assertSame(Object[].class, a.getClass());
424
425	Integer[] elements = new Integer[SIZE];
426	for (int i = 0; i < SIZE; i++)
427	elements[i] = i;
428	Collections.shuffle(Arrays.asList(elements));
429	Collection<Integer> full = populatedArray(elements);
430
431	assertTrue(Arrays.equals(elements, full.toArray()));
432	assertSame(Object[].class, full.toArray().getClass());
433	}
434
435	/**
436	* toArray(Integer array) returns an Integer array containing all
437	* elements from the list in insertion order
438	*/
439	public void testToArray2() {
440	Collection empty = new CopyOnWriteArrayList();
441	Integer[] a;
442
443	a = new Integer[0];
444	assertSame(a, empty.toArray(a));
445
446	a = new Integer[SIZE/2];
447	Arrays.fill(a, 42);
448	assertSame(a, empty.toArray(a));
449	assertNull(a[0]);
450	for (int i = 1; i < a.length; i++)
451	assertEquals(42, (int) a[i]);
452
453	Integer[] elements = new Integer[SIZE];
454	for (int i = 0; i < SIZE; i++)
455	elements[i] = i;
456	Collections.shuffle(Arrays.asList(elements));
457	Collection<Integer> full = populatedArray(elements);
458
459	Arrays.fill(a, 42);
460	assertTrue(Arrays.equals(elements, full.toArray(a)));
461	for (int i = 0; i < a.length; i++)
462	assertEquals(42, (int) a[i]);
463	assertSame(Integer[].class, full.toArray(a).getClass());
464
465	a = new Integer[SIZE];
466	Arrays.fill(a, 42);
467	assertSame(a, full.toArray(a));
468	assertTrue(Arrays.equals(elements, a));
469
470	a = new Integer[2*SIZE];
471	Arrays.fill(a, 42);
472	assertSame(a, full.toArray(a));
473	assertTrue(Arrays.equals(elements, Arrays.copyOf(a, SIZE)));
474	assertNull(a[SIZE]);
475	for (int i = SIZE + 1; i < a.length; i++)
476	assertEquals(42, (int) a[i]);
477	}
478
479	/**
480	* sublists contains elements at indexes offset from their base
481	*/
482	public void testSubList() {
483	CopyOnWriteArrayList a = populatedArray(10);
484	assertTrue(a.subList(1,1).isEmpty());
485	for (int j = 0; j < 9; ++j) {
486	for (int i = j ; i < 10; ++i) {
487	List b = a.subList(j,i);
488	for (int k = j; k < i; ++k) {
489	assertEquals(new Integer(k), b.get(k-j));
490	}
491	}
492	}
493
494	List s = a.subList(2, 5);
495	assertEquals(3, s.size());
496	s.set(2, m1);
497	assertEquals(a.get(4), m1);
498	s.clear();
499	assertEquals(7, a.size());
500	}
501
502	// Exception tests
503
504	/**
505	* toArray throws an ArrayStoreException when the given array
506	* can not store the objects inside the list
507	*/
508	public void testToArray_ArrayStoreException() {
509	CopyOnWriteArrayList c = new CopyOnWriteArrayList();
510	c.add("zfasdfsdf");
511	c.add("asdadasd");
512	try {
513	c.toArray(new Long[5]);
514	shouldThrow();
515	} catch (ArrayStoreException success) {}
516	}
517
518	/**
519	* get throws an IndexOutOfBoundsException on a negative index
520	*/
521	public void testGet1_IndexOutOfBoundsException() {
522	CopyOnWriteArrayList c = populatedArray(5);
523	List[] lists = { c, c.subList(1, c.size() - 1) };
524	for (List list : lists) {
525	try {
526	list.get(-1);
527	shouldThrow();
528	} catch (IndexOutOfBoundsException success) {}
529	}
530	}
531
532	/**
533	* get throws an IndexOutOfBoundsException on a too high index
534	*/
535	public void testGet2_IndexOutOfBoundsException() {
536	CopyOnWriteArrayList c = populatedArray(5);
537	List[] lists = { c, c.subList(1, c.size() - 1) };
538	for (List list : lists) {
539	try {
540	list.get(list.size());
541	shouldThrow();
542	} catch (IndexOutOfBoundsException success) {}
543	}
544	}
545
546	/**
547	* set throws an IndexOutOfBoundsException on a negative index
548	*/
549	public void testSet1_IndexOutOfBoundsException() {
550	CopyOnWriteArrayList c = populatedArray(5);
551	List[] lists = { c, c.subList(1, c.size() - 1) };
552	for (List list : lists) {
553	try {
554	list.set(-1, "qwerty");
555	shouldThrow();
556	} catch (IndexOutOfBoundsException success) {}
557	}
558	}
559
560	/**
561	* set throws an IndexOutOfBoundsException on a too high index
562	*/
563	public void testSet2() {
564	CopyOnWriteArrayList c = populatedArray(5);
565	List[] lists = { c, c.subList(1, c.size() - 1) };
566	for (List list : lists) {
567	try {
568	list.set(list.size(), "qwerty");
569	shouldThrow();
570	} catch (IndexOutOfBoundsException success) {}
571	}
572	}
573
574	/**
575	* add throws an IndexOutOfBoundsException on a negative index
576	*/
577	public void testAdd1_IndexOutOfBoundsException() {
578	CopyOnWriteArrayList c = populatedArray(5);
579	List[] lists = { c, c.subList(1, c.size() - 1) };
580	for (List list : lists) {
581	try {
582	list.add(-1, "qwerty");
583	shouldThrow();
584	} catch (IndexOutOfBoundsException success) {}
585	}
586	}
587
588	/**
589	* add throws an IndexOutOfBoundsException on a too high index
590	*/
591	public void testAdd2_IndexOutOfBoundsException() {
592	CopyOnWriteArrayList c = populatedArray(5);
593	List[] lists = { c, c.subList(1, c.size() - 1) };
594	for (List list : lists) {
595	try {
596	list.add(list.size() + 1, "qwerty");
597	shouldThrow();
598	} catch (IndexOutOfBoundsException success) {}
599	}
600	}
601
602	/**
603	* remove throws an IndexOutOfBoundsException on a negative index
604	*/
605	public void testRemove1_IndexOutOfBounds() {
606	CopyOnWriteArrayList c = populatedArray(5);
607	List[] lists = { c, c.subList(1, c.size() - 1) };
608	for (List list : lists) {
609	try {
610	list.remove(-1);
611	shouldThrow();
612	} catch (IndexOutOfBoundsException success) {}
613	}
614	}
615
616	/**
617	* remove throws an IndexOutOfBoundsException on a too high index
618	*/
619	public void testRemove2_IndexOutOfBounds() {
620	CopyOnWriteArrayList c = populatedArray(5);
621	List[] lists = { c, c.subList(1, c.size() - 1) };
622	for (List list : lists) {
623	try {
624	list.remove(list.size());
625	shouldThrow();
626	} catch (IndexOutOfBoundsException success) {}
627	}
628	}
629
630	/**
631	* addAll throws an IndexOutOfBoundsException on a negative index
632	*/
633	public void testAddAll1_IndexOutOfBoundsException() {
634	CopyOnWriteArrayList c = populatedArray(5);
635	List[] lists = { c, c.subList(1, c.size() - 1) };
636	for (List list : lists) {
637	try {
638	list.addAll(-1, new LinkedList());
639	shouldThrow();
640	} catch (IndexOutOfBoundsException success) {}
641	}
642	}
643
644	/**
645	* addAll throws an IndexOutOfBoundsException on a too high index
646	*/
647	public void testAddAll2_IndexOutOfBoundsException() {
648	CopyOnWriteArrayList c = populatedArray(5);
649	List[] lists = { c, c.subList(1, c.size() - 1) };
650	for (List list : lists) {
651	try {
652	list.addAll(list.size() + 1, new LinkedList());
653	shouldThrow();
654	} catch (IndexOutOfBoundsException success) {}
655	}
656	}
657
658	/**
659	* listIterator throws an IndexOutOfBoundsException on a negative index
660	*/
661	public void testListIterator1_IndexOutOfBoundsException() {
662	CopyOnWriteArrayList c = populatedArray(5);
663	List[] lists = { c, c.subList(1, c.size() - 1) };
664	for (List list : lists) {
665	try {
666	list.listIterator(-1);
667	shouldThrow();
668	} catch (IndexOutOfBoundsException success) {}
669	}
670	}
671
672	/**
673	* listIterator throws an IndexOutOfBoundsException on a too high index
674	*/
675	public void testListIterator2_IndexOutOfBoundsException() {
676	CopyOnWriteArrayList c = populatedArray(5);
677	List[] lists = { c, c.subList(1, c.size() - 1) };
678	for (List list : lists) {
679	try {
680	list.listIterator(list.size() + 1);
681	shouldThrow();
682	} catch (IndexOutOfBoundsException success) {}
683	}
684	}
685
686	/**
687	* subList throws an IndexOutOfBoundsException on a negative index
688	*/
689	public void testSubList1_IndexOutOfBoundsException() {
690	CopyOnWriteArrayList c = populatedArray(5);
691	List[] lists = { c, c.subList(1, c.size() - 1) };
692	for (List list : lists) {
693	try {
694	list.subList(-1, list.size());
695	shouldThrow();
696	} catch (IndexOutOfBoundsException success) {}
697	}
698	}
699
700	/**
701	* subList throws an IndexOutOfBoundsException on a too high index
702	*/
703	public void testSubList2_IndexOutOfBoundsException() {
704	CopyOnWriteArrayList c = populatedArray(5);
705	List[] lists = { c, c.subList(1, c.size() - 1) };
706	for (List list : lists) {
707	try {
708	list.subList(0, list.size() + 1);
709	shouldThrow();
710	} catch (IndexOutOfBoundsException success) {}
711	}
712	}
713
714	/**
715	* subList throws IndexOutOfBoundsException when the second index
716	* is lower then the first
717	*/
718	public void testSubList3_IndexOutOfBoundsException() {
719	CopyOnWriteArrayList c = populatedArray(5);
720	List[] lists = { c, c.subList(1, c.size() - 1) };
721	for (List list : lists) {
722	try {
723	list.subList(list.size() - 1, 1);
724	shouldThrow();
725	} catch (IndexOutOfBoundsException success) {}
726	}
727	}
728
729	/**
730	* a deserialized serialized list is equal
731	*/
732	public void testSerialization() throws Exception {
733	List x = populatedArray(SIZE);
734	List y = serialClone(x);
735
736	assertNotSame(x, y);
737	assertEquals(x.size(), y.size());
738	assertEquals(x.toString(), y.toString());
739	assertTrue(Arrays.equals(x.toArray(), y.toArray()));
740	assertEquals(x, y);
741	assertEquals(y, x);
742	while (!x.isEmpty()) {
743	assertFalse(y.isEmpty());
744	assertEquals(x.remove(0), y.remove(0));
745	}
746	assertTrue(y.isEmpty());
747	}
748
749	}