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1
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package abbot.util;
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2
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3
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import java.awt.*;
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4
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import java.awt.event.*;
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5
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import javax.swing.*;
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6
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import java.util.*;
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7
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import java.util.List;
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8
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9
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import abbot.Log;
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10
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import junit.extensions.abbot.*;
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11
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12
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public class WeakAWTEventListenerTest extends ComponentTestFixture {
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13
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14
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private class Listener implements AWTEventListener {
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15
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public List events = new ArrayList();
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16
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public List contexts = new ArrayList();
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17
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74
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public void eventDispatched(AWTEvent e) {
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18
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74
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events.add(e);
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19
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class Context extends RuntimeException { }
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20
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74
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contexts.add(new Context());
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21
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}
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22
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}
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23
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24
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1
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public void testAddAndRemove() {
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25
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1
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ArrayList list = new ArrayList();
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26
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1
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Toolkit toolkit = Toolkit.getDefaultToolkit();
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27
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1
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int SIZE = 1000;
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28
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1
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Listener l1 = new Listener();
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29
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1
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toolkit.addAWTEventListener(l1, -1);
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30
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31
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1
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for (int i=0;i < SIZE;i++) {
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32
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1000
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Listener listener = new Listener();
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33
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1000
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list.add(listener);
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34
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1000
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new WeakAWTEventListener(listener, -1);
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35
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}
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36
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1
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Listener l2 = new Listener();
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37
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1
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toolkit.addAWTEventListener(l2, -1);
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38
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1
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list.clear();
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39
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1
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System.gc();
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40
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41
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42
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43
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1
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showFrame(new JLabel(getName()));
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44
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45
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46
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1
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Throwable t1 = (Throwable)l1.contexts.get(l1.contexts.size()-1);
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47
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1
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Throwable t2 = (Throwable)l2.contexts.get(l2.contexts.size()-1);
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48
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49
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1
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try {
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50
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1
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int MAX_STACK = 2000;
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51
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1
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String stack1 = Log.getStack(t1);
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52
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1
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assertTrue("Stack trace too long ("
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53
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+ stack1.length() + "): " + stack1,
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54
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stack1.length() < MAX_STACK);
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55
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1
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String stack2 = Log.getStack(t2);
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56
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1
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assertTrue("Stack trace too long ("
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57
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+ stack2.length() + "): " + stack2,
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58
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stack2.length() < MAX_STACK);
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59
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}
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60
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finally {
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61
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1
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toolkit.removeAWTEventListener(l1);
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62
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1
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toolkit.removeAWTEventListener(l2);
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63
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}
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64
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}
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65
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66
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1
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public WeakAWTEventListenerTest(String name) { super(name); }
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67
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0
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public static void main(String[] args) {
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68
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0
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TestHelper.runTests(args, WeakAWTEventListenerTest.class);
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69
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}
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70
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}
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71
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