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1
4 package com.tc.object.util;
5
6 import java.util.WeakHashMap  ;
7
8 import junit.framework.TestCase;
9
10
13 public class IdentityWeakHashMapTest extends TestCase {
14 public void tests() throws Exception {
15 examineIdentityWeakHashMap();
16 examineWeakHashMap();
17 }
18
19 private void examineIdentityWeakHashMap() {
20 IdentityWeakHashMap map = new IdentityWeakHashMap();
21 TestObj k1 = new TestObj();
22 TestObj k2 = new TestObj();
23 map.put(k1, new Integer (1));
24 assertTrue(map.size() == 1);
25 assertTrue(map.containsKey(k1));
26 assertFalse(map.containsKey(new TestObj()));
27 map.put(k2, new Integer (2));
28 assertTrue(map.size() == 2);
29 assertTrue(map.containsKey(k1));
30 assertTrue(map.containsKey(k2));
31 map.put(k1, new Integer (3));
32 assertTrue(map.size()==2);
33 assertTrue(map.containsKey(k1));
34 assertTrue(map.get(k1).equals(new Integer (3)));
35
36 TestObj[] objects = new TestObj[1000];
37 for(int i=0;i<objects.length;i++){
38 objects[i] = new TestObj();
39 map.put(objects[i], new Long (i));
40 }
41
42 for(int i=0;i<objects.length;i++){
43 map.put(objects[i], new Long (i));
44 }
45
46 for(int i=0;i<objects.length;i++){
47 map.remove(objects[i]);
48 }
49 System.out.println("size:"+map.size());
50 assertTrue(map.size()==2);
51 }
52
53 private void examineWeakHashMap() {
54 WeakHashMap map = new WeakHashMap ();
55 TestObj k1 = new TestObj();
56 TestObj k2 = new TestObj();
57 map.put(k1, new Integer (1));
58 assertTrue(map.size() == 1);
59 assertTrue(map.containsKey(k1));
60 assertTrue(map.containsKey(new TestObj()));
61 map.put(k2, new Integer (2));
62 assertFalse(map.size() == 2);
63 assertTrue(map.size() == 1);
64 assertTrue(map.containsKey(k1));
65 assertTrue(map.containsKey(k2));
66 map.put(k1, new Integer (3));
67 assertTrue(map.size()==1);
68 assertTrue(map.containsKey(k1));
69 assertTrue(map.get(k1).equals(new Integer (3)));
70
71 TestObj[] objects = new TestObj[1000];
72 for(int i=0;i<objects.length;i++){
73 objects[i] = new TestObj();
74 map.put(objects[i], new Long (i));
75 }
76
77 for(int i=0;i<objects.length;i++){
78 map.put(objects[i], new Long (i));
79 }
80
81 map.remove(objects[0]);
82 System.out.println("size:"+map.size());
83 assertTrue(map.size()==0);
84 }
85
86 private class TestObj {
87 public int hashCode(){
88 return 10;
89 }
90
91 public boolean equals(Object obj){
92 return true;
93 }
94 }
95 }
96 |
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