/*
* 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/licenses/publicdomain
* Other contributors include Andrew Wright, Jeffrey Hayes,
* Pat Fisher, Mike Judd.
*/
import junit.framework.*;
import java.util.*;
import java.util.concurrent.*;
import java.io.*;
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 populatedArray(int n){
CopyOnWriteArrayList a = new CopyOnWriteArrayList();
assertTrue(a.isEmpty());
for (int i = 0; i < n; ++i)
a.add(new Integer(i));
assertFalse(a.isEmpty());
assertEquals(n, 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, ((Integer)full.get(0)).intValue());
}
/**
* indexOf gives the index for the given object
*/
public void testIndexOf() {
CopyOnWriteArrayList full = populatedArray(3);
assertEquals(1, full.indexOf(one));
assertEquals(-1, full.indexOf("puppies"));
}
/**
* indexOf gives the index based on the given index
* at which to start searching
*/
public void testIndexOf2() {
CopyOnWriteArrayList full = populatedArray(3);
assertEquals(1, full.indexOf(one, 0));
assertEquals(-1, full.indexOf(one, 2));
}
/**
* isEmpty returns true when empty, else false
*/
public void testIsEmpty() {
CopyOnWriteArrayList empty = new CopyOnWriteArrayList();
CopyOnWriteArrayList full = populatedArray(SIZE);
assertTrue(empty.isEmpty());
assertFalse(full.isEmpty());
}
/**
* iterator() returns an iterator containing the elements of the list
*/
public void testIterator() {
CopyOnWriteArrayList full = populatedArray(SIZE);
Iterator i = full.iterator();
int j;
for(j = 0; i.hasNext(); j++)
assertEquals(j, ((Integer)i.next()).intValue());
assertEquals(SIZE, j);
}
/**
* iterator.remove throws UnsupportedOperationException
*/
public void testIteratorRemove () {
CopyOnWriteArrayList full = populatedArray(SIZE);
Iterator it = full.iterator();
it.next();
try {
it.remove();
shouldThrow();
}
catch (UnsupportedOperationException success) {}
}
/**
* toString contains toString of elements
*/
public void testToString() {
CopyOnWriteArrayList full = populatedArray(3);
String s = full.toString();
for (int i = 0; i < 3; ++i) {
assertTrue(s.indexOf(String.valueOf(i)) >= 0);
}
}
/**
* 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, ((Integer)i.next()).intValue());
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, ((Integer)i.next()).intValue());
assertEquals(2, j);
}
/**
* remove removes and returns the object at the given index
*/
public void testRemove() {
CopyOnWriteArrayList full = populatedArray(3);
assertEquals(two, full.remove(2));
assertEquals(2, full.size());
}
/**
* removeAll removes all elements from the given collection
*/
public void testRemoveAll() {
CopyOnWriteArrayList full = populatedArray(3);
Vector v = new Vector();
v.add(one);
v.add(two);
full.removeAll(v);
assertEquals(1, full.size());
}
/**
* set changes the element at the given index
*/
public void testSet() {
CopyOnWriteArrayList full = populatedArray(3);
assertEquals(two, full.set(2, four));
assertEquals(4, ((Integer)full.get(2)).intValue());
}
/**
* 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
*/
public void testToArray() {
CopyOnWriteArrayList full = populatedArray(3);
Object[] o = full.toArray();
assertEquals(3, o.length);
assertEquals(0, ((Integer)o[0]).intValue());
assertEquals(1, ((Integer)o[1]).intValue());
assertEquals(2, ((Integer)o[2]).intValue());
}
/**
* toArray returns an Integer array containing all elements from
* the list
*/
public void testToArray2() {
CopyOnWriteArrayList full = populatedArray(3);
Integer[] i = new Integer[3];
i = (Integer[])full.toArray(i);
assertEquals(3, i.length);
assertEquals(0, i[0].intValue());
assertEquals(1, i[1].intValue());
assertEquals(2, i[2].intValue());
}
/**
* 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(s.size(), 3);
s.set(2, m1);
assertEquals(a.get(4), m1);
s.clear();
assertEquals(a.size(), 7);
}
// Exception tests
/**
* toArray throws an ArrayStoreException when the given array
* can not store the objects inside the list
*/
public void testToArray_ArrayStoreException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("zfasdfsdf");
c.add("asdadasd");
c.toArray(new Long[5]);
shouldThrow();
} catch(ArrayStoreException e){}
}
/**
* get throws an IndexOutOfBoundsException on a negative index
*/
public void testGet1_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.get(-1);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* get throws an IndexOutOfBoundsException on a too high index
*/
public void testGet2_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("asdasd");
c.add("asdad");
c.get(100);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* set throws an IndexOutOfBoundsException on a negative index
*/
public void testSet1_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.set(-1,"qwerty");
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* set throws an IndexOutOfBoundsException on a too high index
*/
public void testSet2() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("asdasd");
c.add("asdad");
c.set(100, "qwerty");
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* add throws an IndexOutOfBoundsException on a negative index
*/
public void testAdd1_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add(-1,"qwerty");
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* add throws an IndexOutOfBoundsException on a too high index
*/
public void testAdd2_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("asdasd");
c.add("asdasdasd");
c.add(100, "qwerty");
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* remove throws an IndexOutOfBoundsException on a negative index
*/
public void testRemove1_IndexOutOfBounds() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.remove(-1);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* remove throws an IndexOutOfBoundsException on a too high index
*/
public void testRemove2_IndexOutOfBounds() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("asdasd");
c.add("adasdasd");
c.remove(100);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* addAll throws an IndexOutOfBoundsException on a negative index
*/
public void testAddAll1_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.addAll(-1,new LinkedList());
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* addAll throws an IndexOutOfBoundsException on a too high index
*/
public void testAddAll2_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("asdasd");
c.add("asdasdasd");
c.addAll(100, new LinkedList());
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* listIterator throws an IndexOutOfBoundsException on a negative index
*/
public void testListIterator1_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.listIterator(-1);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* listIterator throws an IndexOutOfBoundsException on a too high index
*/
public void testListIterator2_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("adasd");
c.add("asdasdas");
c.listIterator(100);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* subList throws an IndexOutOfBoundsException on a negative index
*/
public void testSubList1_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.subList(-1,100);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* subList throws an IndexOutOfBoundsException on a too high index
*/
public void testSubList2_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.add("asdasd");
c.subList(1,100);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* subList throws IndexOutOfBoundsException when the second index
* is lower then the first
*/
public void testSubList3_IndexOutOfBoundsException() {
try {
CopyOnWriteArrayList c = new CopyOnWriteArrayList();
c.subList(3,1);
shouldThrow();
} catch(IndexOutOfBoundsException e){}
}
/**
* a deserialized serialiszed list is equal
*/
public void testSerialization() {
CopyOnWriteArrayList q = populatedArray(SIZE);
try {
ByteArrayOutputStream bout = new ByteArrayOutputStream(10000);
ObjectOutputStream out = new ObjectOutputStream(new BufferedOutputStream(bout));
out.writeObject(q);
out.close();
ByteArrayInputStream bin = new ByteArrayInputStream(bout.toByteArray());
ObjectInputStream in = new ObjectInputStream(new BufferedInputStream(bin));
CopyOnWriteArrayList r = (CopyOnWriteArrayList)in.readObject();
assertEquals(q.size(), r.size());
assertTrue(q.equals(r));
assertTrue(r.equals(q));
} catch(Exception e){
unexpectedException();
}
}
}