1 |
/* |
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* Written by Doug Lea with assistance from members of JCP JSR-166 |
3 |
* Expert Group and released to the public domain, as explained at |
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* http://creativecommons.org/licenses/publicdomain |
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* Other contributors include Andrew Wright, Jeffrey Hayes, |
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* Pat Fisher, Mike Judd. |
7 |
*/ |
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|
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import junit.framework.*; |
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import java.util.*; |
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import java.util.concurrent.*; |
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import java.io.*; |
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|
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public class CopyOnWriteArrayListTest extends JSR166TestCase{ |
15 |
|
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public static void main(String[] args) { |
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junit.textui.TestRunner.run (suite()); |
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} |
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|
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public static Test suite() { |
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return new TestSuite(CopyOnWriteArrayListTest.class); |
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} |
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|
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static CopyOnWriteArrayList populatedArray(int n){ |
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CopyOnWriteArrayList a = new CopyOnWriteArrayList(); |
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assertTrue(a.isEmpty()); |
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for (int i = 0; i < n; ++i) |
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a.add(new Integer(i)); |
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assertFalse(a.isEmpty()); |
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assertEquals(n, a.size()); |
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return a; |
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} |
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|
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|
35 |
/** |
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* a new list is empty |
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*/ |
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public void testConstructor() { |
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CopyOnWriteArrayList a = new CopyOnWriteArrayList(); |
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assertTrue(a.isEmpty()); |
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} |
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|
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/** |
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* new list contains all elements of initializing array |
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*/ |
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public void testConstructor2() { |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE-1; ++i) |
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ints[i] = new Integer(i); |
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CopyOnWriteArrayList a = new CopyOnWriteArrayList(ints); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], a.get(i)); |
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} |
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|
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/** |
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* new list contains all elements of initializing collection |
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*/ |
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public void testConstructor3() { |
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Integer[] ints = new Integer[SIZE]; |
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for (int i = 0; i < SIZE-1; ++i) |
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ints[i] = new Integer(i); |
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CopyOnWriteArrayList a = new CopyOnWriteArrayList(Arrays.asList(ints)); |
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for (int i = 0; i < SIZE; ++i) |
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assertEquals(ints[i], a.get(i)); |
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} |
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|
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|
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/** |
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* addAll adds each element from the given collection |
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*/ |
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public void testAddAll() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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Vector v = new Vector(); |
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v.add(three); |
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v.add(four); |
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v.add(five); |
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full.addAll(v); |
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assertEquals(6, full.size()); |
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} |
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|
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/** |
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* addAllAbsent adds each element from the given collection that did not |
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* already exist in the List |
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*/ |
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public void testAddAllAbsent() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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Vector v = new Vector(); |
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v.add(three); |
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v.add(four); |
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v.add(one); // will not add this element |
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full.addAllAbsent(v); |
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assertEquals(5, full.size()); |
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} |
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|
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/** |
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* addIfAbsent will not add the element if it already exists in the list |
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*/ |
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public void testAddIfAbsent() { |
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CopyOnWriteArrayList full = populatedArray(SIZE); |
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full.addIfAbsent(one); |
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assertEquals(SIZE, full.size()); |
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} |
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|
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/** |
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* addIfAbsent adds the element when it does not exist in the list |
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*/ |
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public void testAddIfAbsent2() { |
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CopyOnWriteArrayList full = populatedArray(SIZE); |
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full.addIfAbsent(three); |
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assertTrue(full.contains(three)); |
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} |
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|
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/** |
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* clear removes all elements from the list |
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*/ |
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public void testClear() { |
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CopyOnWriteArrayList full = populatedArray(SIZE); |
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full.clear(); |
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assertEquals(0, full.size()); |
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} |
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|
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|
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/** |
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* Cloned list is equal |
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*/ |
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public void testClone() { |
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CopyOnWriteArrayList l1 = populatedArray(SIZE); |
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CopyOnWriteArrayList l2 = (CopyOnWriteArrayList)(l1.clone()); |
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assertEquals(l1, l2); |
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l1.clear(); |
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assertFalse(l1.equals(l2)); |
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} |
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|
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/** |
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* contains is true for added elements |
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*/ |
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public void testContains() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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assertTrue(full.contains(one)); |
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assertFalse(full.contains(five)); |
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} |
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|
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/** |
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* adding at an index places it in the indindicated index |
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*/ |
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public void testAddIndex() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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full.add(0, m1); |
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assertEquals(4, full.size()); |
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assertEquals(m1, full.get(0)); |
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assertEquals(zero, full.get(1)); |
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|
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full.add(2, m2); |
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assertEquals(5, full.size()); |
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assertEquals(m2, full.get(2)); |
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assertEquals(two, full.get(4)); |
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} |
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|
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/** |
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* lists with same elements are equal and have same hashCode |
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*/ |
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public void testEquals() { |
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CopyOnWriteArrayList a = populatedArray(3); |
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CopyOnWriteArrayList b = populatedArray(3); |
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assertTrue(a.equals(b)); |
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assertTrue(b.equals(a)); |
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assertEquals(a.hashCode(), b.hashCode()); |
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a.add(m1); |
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assertFalse(a.equals(b)); |
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assertFalse(b.equals(a)); |
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b.add(m1); |
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assertTrue(a.equals(b)); |
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assertTrue(b.equals(a)); |
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assertEquals(a.hashCode(), b.hashCode()); |
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} |
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|
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|
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/** |
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* containsAll returns true for collection with subset of elements |
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*/ |
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public void testContainsAll() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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Vector v = new Vector(); |
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v.add(one); |
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v.add(two); |
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assertTrue(full.containsAll(v)); |
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v.add(six); |
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assertFalse(full.containsAll(v)); |
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} |
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|
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/** |
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* get returns the value at the given index |
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*/ |
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public void testGet() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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assertEquals(0, ((Integer)full.get(0)).intValue()); |
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} |
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|
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/** |
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* indexOf gives the index for the given object |
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*/ |
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public void testIndexOf() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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assertEquals(1, full.indexOf(one)); |
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assertEquals(-1, full.indexOf("puppies")); |
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} |
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|
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/** |
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* indexOf gives the index based on the given index |
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* at which to start searching |
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*/ |
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public void testIndexOf2() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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assertEquals(1, full.indexOf(one, 0)); |
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assertEquals(-1, full.indexOf(one, 2)); |
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} |
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|
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/** |
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* isEmpty returns true when empty, else false |
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*/ |
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public void testIsEmpty() { |
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CopyOnWriteArrayList empty = new CopyOnWriteArrayList(); |
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CopyOnWriteArrayList full = populatedArray(SIZE); |
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assertTrue(empty.isEmpty()); |
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assertFalse(full.isEmpty()); |
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} |
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|
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/** |
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* iterator() returns an iterator containing the elements of the list |
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*/ |
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public void testIterator() { |
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CopyOnWriteArrayList full = populatedArray(SIZE); |
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Iterator i = full.iterator(); |
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int j; |
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for(j = 0; i.hasNext(); j++) |
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assertEquals(j, ((Integer)i.next()).intValue()); |
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assertEquals(SIZE, j); |
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} |
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|
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/** |
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* iterator.remove throws UnsupportedOperationException |
242 |
*/ |
243 |
public void testIteratorRemove () { |
244 |
CopyOnWriteArrayList full = populatedArray(SIZE); |
245 |
Iterator it = full.iterator(); |
246 |
it.next(); |
247 |
try { |
248 |
it.remove(); |
249 |
shouldThrow(); |
250 |
} |
251 |
catch (UnsupportedOperationException success) {} |
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} |
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|
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/** |
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* toString contains toString of elements |
256 |
*/ |
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public void testToString() { |
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CopyOnWriteArrayList full = populatedArray(3); |
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String s = full.toString(); |
260 |
for (int i = 0; i < 3; ++i) { |
261 |
assertTrue(s.indexOf(String.valueOf(i)) >= 0); |
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} |
263 |
} |
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|
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/** |
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* lastIndexOf returns the index for the given object |
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*/ |
268 |
public void testLastIndexOf1() { |
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CopyOnWriteArrayList full = populatedArray(3); |
270 |
full.add(one); |
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full.add(three); |
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assertEquals(3, full.lastIndexOf(one)); |
273 |
assertEquals(-1, full.lastIndexOf(six)); |
274 |
} |
275 |
|
276 |
/** |
277 |
* lastIndexOf returns the index from the given starting point |
278 |
*/ |
279 |
public void testlastIndexOf2() { |
280 |
CopyOnWriteArrayList full = populatedArray(3); |
281 |
full.add(one); |
282 |
full.add(three); |
283 |
assertEquals(3, full.lastIndexOf(one, 4)); |
284 |
assertEquals(-1, full.lastIndexOf(three, 3)); |
285 |
} |
286 |
|
287 |
/** |
288 |
* listIterator traverses all elements |
289 |
*/ |
290 |
public void testListIterator1() { |
291 |
CopyOnWriteArrayList full = populatedArray(SIZE); |
292 |
ListIterator i = full.listIterator(); |
293 |
int j; |
294 |
for(j = 0; i.hasNext(); j++) |
295 |
assertEquals(j, ((Integer)i.next()).intValue()); |
296 |
assertEquals(SIZE, j); |
297 |
} |
298 |
|
299 |
/** |
300 |
* listIterator only returns those elements after the given index |
301 |
*/ |
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public void testListIterator2() { |
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CopyOnWriteArrayList full = populatedArray(3); |
304 |
ListIterator i = full.listIterator(1); |
305 |
int j; |
306 |
for(j = 0; i.hasNext(); j++) |
307 |
assertEquals(j+1, ((Integer)i.next()).intValue()); |
308 |
assertEquals(2, j); |
309 |
} |
310 |
|
311 |
/** |
312 |
* remove removes and returns the object at the given index |
313 |
*/ |
314 |
public void testRemove() { |
315 |
CopyOnWriteArrayList full = populatedArray(3); |
316 |
assertEquals(two, full.remove(2)); |
317 |
assertEquals(2, full.size()); |
318 |
} |
319 |
|
320 |
/** |
321 |
* removeAll removes all elements from the given collection |
322 |
*/ |
323 |
public void testRemoveAll() { |
324 |
CopyOnWriteArrayList full = populatedArray(3); |
325 |
Vector v = new Vector(); |
326 |
v.add(one); |
327 |
v.add(two); |
328 |
full.removeAll(v); |
329 |
assertEquals(1, full.size()); |
330 |
} |
331 |
|
332 |
/** |
333 |
* set changes the element at the given index |
334 |
*/ |
335 |
public void testSet() { |
336 |
CopyOnWriteArrayList full = populatedArray(3); |
337 |
assertEquals(two, full.set(2, four)); |
338 |
assertEquals(4, ((Integer)full.get(2)).intValue()); |
339 |
} |
340 |
|
341 |
/** |
342 |
* size returns the number of elements |
343 |
*/ |
344 |
public void testSize() { |
345 |
CopyOnWriteArrayList empty = new CopyOnWriteArrayList(); |
346 |
CopyOnWriteArrayList full = populatedArray(SIZE); |
347 |
assertEquals(SIZE, full.size()); |
348 |
assertEquals(0, empty.size()); |
349 |
} |
350 |
|
351 |
/** |
352 |
* toArray returns an Object array containing all elements from the list |
353 |
*/ |
354 |
public void testToArray() { |
355 |
CopyOnWriteArrayList full = populatedArray(3); |
356 |
Object[] o = full.toArray(); |
357 |
assertEquals(3, o.length); |
358 |
assertEquals(0, ((Integer)o[0]).intValue()); |
359 |
assertEquals(1, ((Integer)o[1]).intValue()); |
360 |
assertEquals(2, ((Integer)o[2]).intValue()); |
361 |
} |
362 |
|
363 |
/** |
364 |
* toArray returns an Integer array containing all elements from |
365 |
* the list |
366 |
*/ |
367 |
public void testToArray2() { |
368 |
CopyOnWriteArrayList full = populatedArray(3); |
369 |
Integer[] i = new Integer[3]; |
370 |
i = (Integer[])full.toArray(i); |
371 |
assertEquals(3, i.length); |
372 |
assertEquals(0, i[0].intValue()); |
373 |
assertEquals(1, i[1].intValue()); |
374 |
assertEquals(2, i[2].intValue()); |
375 |
} |
376 |
|
377 |
|
378 |
/** |
379 |
* sublists contains elements at indexes offset from their base |
380 |
*/ |
381 |
public void testSubList() { |
382 |
CopyOnWriteArrayList a = populatedArray(10); |
383 |
assertTrue(a.subList(1,1).isEmpty()); |
384 |
for(int j = 0; j < 9; ++j) { |
385 |
for(int i = j ; i < 10; ++i) { |
386 |
List b = a.subList(j,i); |
387 |
for(int k = j; k < i; ++k) { |
388 |
assertEquals(new Integer(k), b.get(k-j)); |
389 |
} |
390 |
} |
391 |
} |
392 |
|
393 |
List s = a.subList(2, 5); |
394 |
assertEquals(s.size(), 3); |
395 |
s.set(2, m1); |
396 |
assertEquals(a.get(4), m1); |
397 |
s.clear(); |
398 |
assertEquals(a.size(), 7); |
399 |
} |
400 |
|
401 |
// Exception tests |
402 |
|
403 |
/** |
404 |
* toArray throws an ArrayStoreException when the given array |
405 |
* can not store the objects inside the list |
406 |
*/ |
407 |
public void testToArray_ArrayStoreException() { |
408 |
try { |
409 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
410 |
c.add("zfasdfsdf"); |
411 |
c.add("asdadasd"); |
412 |
c.toArray(new Long[5]); |
413 |
shouldThrow(); |
414 |
} catch(ArrayStoreException e){} |
415 |
} |
416 |
|
417 |
/** |
418 |
* get throws an IndexOutOfBoundsException on a negative index |
419 |
*/ |
420 |
public void testGet1_IndexOutOfBoundsException() { |
421 |
try { |
422 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
423 |
c.get(-1); |
424 |
shouldThrow(); |
425 |
} catch(IndexOutOfBoundsException e){} |
426 |
} |
427 |
|
428 |
/** |
429 |
* get throws an IndexOutOfBoundsException on a too high index |
430 |
*/ |
431 |
public void testGet2_IndexOutOfBoundsException() { |
432 |
try { |
433 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
434 |
c.add("asdasd"); |
435 |
c.add("asdad"); |
436 |
c.get(100); |
437 |
shouldThrow(); |
438 |
} catch(IndexOutOfBoundsException e){} |
439 |
} |
440 |
|
441 |
/** |
442 |
* set throws an IndexOutOfBoundsException on a negative index |
443 |
*/ |
444 |
public void testSet1_IndexOutOfBoundsException() { |
445 |
try { |
446 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
447 |
c.set(-1,"qwerty"); |
448 |
shouldThrow(); |
449 |
} catch(IndexOutOfBoundsException e){} |
450 |
} |
451 |
|
452 |
/** |
453 |
* set throws an IndexOutOfBoundsException on a too high index |
454 |
*/ |
455 |
public void testSet2() { |
456 |
try { |
457 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
458 |
c.add("asdasd"); |
459 |
c.add("asdad"); |
460 |
c.set(100, "qwerty"); |
461 |
shouldThrow(); |
462 |
} catch(IndexOutOfBoundsException e){} |
463 |
} |
464 |
|
465 |
/** |
466 |
* add throws an IndexOutOfBoundsException on a negative index |
467 |
*/ |
468 |
public void testAdd1_IndexOutOfBoundsException() { |
469 |
try { |
470 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
471 |
c.add(-1,"qwerty"); |
472 |
shouldThrow(); |
473 |
} catch(IndexOutOfBoundsException e){} |
474 |
} |
475 |
|
476 |
/** |
477 |
* add throws an IndexOutOfBoundsException on a too high index |
478 |
*/ |
479 |
public void testAdd2_IndexOutOfBoundsException() { |
480 |
try { |
481 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
482 |
c.add("asdasd"); |
483 |
c.add("asdasdasd"); |
484 |
c.add(100, "qwerty"); |
485 |
shouldThrow(); |
486 |
} catch(IndexOutOfBoundsException e){} |
487 |
} |
488 |
|
489 |
/** |
490 |
* remove throws an IndexOutOfBoundsException on a negative index |
491 |
*/ |
492 |
public void testRemove1_IndexOutOfBounds() { |
493 |
try { |
494 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
495 |
c.remove(-1); |
496 |
shouldThrow(); |
497 |
} catch(IndexOutOfBoundsException e){} |
498 |
} |
499 |
|
500 |
/** |
501 |
* remove throws an IndexOutOfBoundsException on a too high index |
502 |
*/ |
503 |
public void testRemove2_IndexOutOfBounds() { |
504 |
try { |
505 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
506 |
c.add("asdasd"); |
507 |
c.add("adasdasd"); |
508 |
c.remove(100); |
509 |
shouldThrow(); |
510 |
} catch(IndexOutOfBoundsException e){} |
511 |
} |
512 |
|
513 |
/** |
514 |
* addAll throws an IndexOutOfBoundsException on a negative index |
515 |
*/ |
516 |
public void testAddAll1_IndexOutOfBoundsException() { |
517 |
try { |
518 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
519 |
c.addAll(-1,new LinkedList()); |
520 |
shouldThrow(); |
521 |
} catch(IndexOutOfBoundsException e){} |
522 |
} |
523 |
|
524 |
/** |
525 |
* addAll throws an IndexOutOfBoundsException on a too high index |
526 |
*/ |
527 |
public void testAddAll2_IndexOutOfBoundsException() { |
528 |
try { |
529 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
530 |
c.add("asdasd"); |
531 |
c.add("asdasdasd"); |
532 |
c.addAll(100, new LinkedList()); |
533 |
shouldThrow(); |
534 |
} catch(IndexOutOfBoundsException e){} |
535 |
} |
536 |
|
537 |
/** |
538 |
* listIterator throws an IndexOutOfBoundsException on a negative index |
539 |
*/ |
540 |
public void testListIterator1_IndexOutOfBoundsException() { |
541 |
try { |
542 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
543 |
c.listIterator(-1); |
544 |
shouldThrow(); |
545 |
} catch(IndexOutOfBoundsException e){} |
546 |
} |
547 |
|
548 |
/** |
549 |
* listIterator throws an IndexOutOfBoundsException on a too high index |
550 |
*/ |
551 |
public void testListIterator2_IndexOutOfBoundsException() { |
552 |
try { |
553 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
554 |
c.add("adasd"); |
555 |
c.add("asdasdas"); |
556 |
c.listIterator(100); |
557 |
shouldThrow(); |
558 |
} catch(IndexOutOfBoundsException e){} |
559 |
} |
560 |
|
561 |
/** |
562 |
* subList throws an IndexOutOfBoundsException on a negative index |
563 |
*/ |
564 |
public void testSubList1_IndexOutOfBoundsException() { |
565 |
try { |
566 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
567 |
c.subList(-1,100); |
568 |
|
569 |
shouldThrow(); |
570 |
} catch(IndexOutOfBoundsException e){} |
571 |
} |
572 |
|
573 |
/** |
574 |
* subList throws an IndexOutOfBoundsException on a too high index |
575 |
*/ |
576 |
public void testSubList2_IndexOutOfBoundsException() { |
577 |
try { |
578 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
579 |
c.add("asdasd"); |
580 |
c.subList(1,100); |
581 |
shouldThrow(); |
582 |
} catch(IndexOutOfBoundsException e){} |
583 |
} |
584 |
|
585 |
/** |
586 |
* subList throws IndexOutOfBoundsException when the second index |
587 |
* is lower then the first |
588 |
*/ |
589 |
public void testSubList3_IndexOutOfBoundsException() { |
590 |
try { |
591 |
CopyOnWriteArrayList c = new CopyOnWriteArrayList(); |
592 |
c.subList(3,1); |
593 |
|
594 |
shouldThrow(); |
595 |
} catch(IndexOutOfBoundsException e){} |
596 |
} |
597 |
|
598 |
/** |
599 |
* a deserialized serialiszed list is equal |
600 |
*/ |
601 |
public void testSerialization() { |
602 |
CopyOnWriteArrayList q = populatedArray(SIZE); |
603 |
|
604 |
try { |
605 |
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000); |
606 |
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout)); |
607 |
out.writeObject(q); |
608 |
out.close(); |
609 |
|
610 |
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray()); |
611 |
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin)); |
612 |
CopyOnWriteArrayList r = (CopyOnWriteArrayList)in.readObject(); |
613 |
assertEquals(q.size(), r.size()); |
614 |
assertTrue(q.equals(r)); |
615 |
assertTrue(r.equals(q)); |
616 |
} catch(Exception e){ |
617 |
unexpectedException(); |
618 |
} |
619 |
} |
620 |
|
621 |
} |