copyonwritearraylisttest.java

来自「SRI international 发布的OAA框架软件」· Java 代码 · 共 623 行 · 第 1/2 页

/*
 * 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 edu.emory.mathcs.backport.java.util.*;
import edu.emory.mathcs.backport.java.util.concurrent.*;
import java.io.*;
import java.util.*;

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);
    }

    /**