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1
15 package org.apache.hivemind.util;
16
17 import hivemind.test.FrameworkTestCase;
18
19 import java.util.ArrayList  ;
20 import java.util.Iterator ;
21 import java.util.List ;
22
23 import org.apache.hivemind.util.EventListenerList;
24
25
30 public class TestEventListenerList extends FrameworkTestCase
31 {
32 private static class Trigger
33 {
34 private boolean _trigger;
35
36 public boolean isTrigger()
37 {
38 return _trigger;
39 }
40
41 public void setTrigger(boolean b)
42 {
43 _trigger = b;
44 }
45
46 }
47
48 private Trigger[] buildTriggers(int count)
49 {
50 Trigger[] result = new Trigger[count];
51
52 for (int i = 0; i < count; i++)
53 {
54 result[i] = new Trigger();
55 }
56
57 return result;
58 }
59
60 private void addAll(EventListenerList l, Trigger[] t)
61 {
62 for (int i = 0; i < t.length; i++)
63 l.addListener(t[i]);
64 }
65
66 private void checkAllTrue(Trigger[] t)
67 {
68 for (int i = 0; i < t.length; i++)
69 assertEquals(true, t[i].isTrigger());
70 }
71
72 public void testBasic()
73 {
74 EventListenerList l = new EventListenerList();
75
76 Trigger[] ta = buildTriggers(20);
77
78 addAll(l, ta);
79
80 Iterator i = l.getListeners();
81
82 while (i.hasNext())
83 {
84 Trigger t = (Trigger) i.next();
85
86 t.setTrigger(true);
87 }
88
89 }
90
91 public void testEmptyList()
92 {
93 EventListenerList l = new EventListenerList();
94
95 Iterator i = l.getListeners();
96
97 assertEquals(false, i.hasNext());
98 }
99
100 public void testLateAdd()
101 {
102 Trigger[] ta = buildTriggers(20);
103 EventListenerList l = new EventListenerList();
104
105 addAll(l, ta);
106
107 Iterator i = l.getListeners();
108
109 for (int j = 0; j < 5; j++)
110 {
111 Trigger t = (Trigger) i.next();
112 t.setTrigger(true);
113 }
114
115 Trigger tnew = new Trigger();
116 l.addListener(tnew);
117
118 while (i.hasNext())
119 {
120 Trigger t = (Trigger) i.next();
121 t.setTrigger(true);
122 }
123
124 assertEquals(false, tnew.isTrigger());
125
126 checkAllTrue(ta);
127 }
128
129 public void testLateRemove()
130 {
131 Trigger[] ta = buildTriggers(20);
132 EventListenerList l = new EventListenerList();
133
134 addAll(l, ta);
135
136 Iterator i = l.getListeners();
137
138 for (int j = 0; j < 5; j++)
139 {
140 Trigger t = (Trigger) i.next();
141 t.setTrigger(true);
142 }
143
144 Trigger tremoved = ta[15];
145 l.removeListener(tremoved);
146
147 while (i.hasNext())
148 {
149 Trigger t = (Trigger) i.next();
150 t.setTrigger(true);
151 }
152
153 checkAllTrue(ta);
154 }
155
156 public void testRemoveMissing()
157 {
158 Trigger[] ta = buildTriggers(20);
159 EventListenerList l = new EventListenerList();
160
161 addAll(l, ta);
162
163 Trigger tremove = new Trigger();
164
165 l.removeListener(tremove);
166
167 Iterator i = l.getListeners();
168 while (i.hasNext())
169 {
170 Trigger t = (Trigger) i.next();
171 t.setTrigger(true);
172 }
173
174 checkAllTrue(ta);
175 }
176
177 public void testIteratorRemoveFailure()
178 {
179 Trigger[] ta = buildTriggers(20);
180 EventListenerList l = new EventListenerList();
181
182 addAll(l, ta);
183
184 Iterator i = l.getListeners();
185
186 for (int j = 0; j < 5; j++)
187 i.next();
188
189 try
190 {
191 i.remove();
192 unreachable();
193 }
194 catch (UnsupportedOperationException ex)
195 {
196 }
197 }
198
199 public void testOutOfMemoryError()
200 {
201 Trigger ta = buildTriggers(1)[0];
202 EventListenerList l = new EventListenerList();
203 List iterators = new ArrayList ();
204
205 try
206 {
207 for (int i = 0; i < 100; i++)
208 {
209 l.addListener(ta);
210
211 iterators.add(l.getListeners());
212
213 l.removeListener(ta);
214
215 }
216
217 }
218 catch (OutOfMemoryError e)
219 {
220 fail("Ran out of memory!");
221 }
222 catch (Throwable e)
223 {
224 fail(e.getMessage());
225 }
226 }
227 }
228 |
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