C.2 Test ProgramThe test program, compList, listed in Source Code shows the events peers pass along to the Java run-time system. You can then examine the output to see how the run-time system reacts to the different events. When you run compList, the screen looks something like the one in Figure C.1. How to Use the ProgramJava does not have an automated record and playback feature, so the work is left for you to do. The program displays 10 components: Label, Button, Scrollbar, List, multiselection List, Choice, Checkbox, TextField, TextArea, and Canvas (the black box in Figure C.1). Basically, you must manually trigger every event for every component. For every component on the screen (except Done), do the following:
The SunTest business unit of Sun Microsystems has an early version of a record and playback Java GUI testing tool called JavaSTAR. Information about it is available at http://www.suntest.com/JavaSTAR/JavaSTAR.html. In the future, it may be possible to use JavaSTAR to help automate this process.
Source CodeThe following is the source code for the test program:
import java.awt.*; import java.util.*; import java.applet.*; public class compList extends Applet { Button done = new Button ("Done"); Hashtable values = new Hashtable(); public void init () { add (new Label ("Label")); add (new Button ("Button")); add (new Scrollbar (Scrollbar.HORIZONTAL, 50, 25, 0, 255)); List l1 = new List (3, false); l1.addItem ("List 1"); l1.addItem ("List 2"); l1.addItem ("List 3"); l1.addItem ("List 4"); l1.addItem ("List 5"); add (l1); List l2 = new List (3, true); l2.addItem ("Multi 1"); l2.addItem ("Multi 2"); l2.addItem ("Multi 3"); l2.addItem ("Multi 4"); l2.addItem ("Multi 5"); add (l2); Choice c = new Choice (); c.addItem ("Choice 1"); c.addItem ("Choice 2"); c.addItem ("Choice 3"); c.addItem ("Choice 4"); c.addItem ("Choice 5"); add (c); add (new Checkbox ("Checkbox")); add (new TextField ("TextField", 10)); add (new TextArea ("TextArea", 3, 20)); Canvas c1 = new Canvas (); c1.resize (50, 50); c1.setBackground (Color.blue); add (c1); add (done); } public boolean handleEvent (Event e) { if (e.target == done) { if (e.id == Event.ACTION_EVENT) { System.out.println (System.getProperty ("java.vendor")); System.out.println (System.getProperty ("java.version")); System.out.println (System.getProperty ("java.class.version")); System.out.println (System.getProperty ("os.name")); System.out.println (values); } }else { Vector v; Class c = e.target.getClass(); v = (Vector)values.get(c); if (v == null) v = new Vector(); Integer i = new Integer (e.id); if (!v.contains (i)) { v.addElement (i); values.put (c, v); } } return super.handleEvent (e); } } An HTML document to display the applet in a browser should look something like the following:
<APPLET code="compList.class" height=300 width=300> </APPLET> Examining ResultsThe results of the program are sent to standard output when you click on the Done button. What happens to the output depends on the platform. It may be sent to a log file (Internet Explorer), the Java Console (Netscape Navigator), or the command line (appletviewer). The following is sample output from Internet Explorer 3.0 on a Windows 95 platform.
Microsoft Corp. 1.0.2 45.3 Windows 95 {class java.awt.Canvas=[504, 503, 1004, 501, 506, 502, 505, 1005, 401, 402, 403, 404], class java.awt.Choice=[1001, 401, 402, 403, 404], class java.awt.Checkbox=[1001, 402, 401, 403, 404], class compList=[504, 503, 501, 506, 502, 505, 1004, 1005], class java. awt.TextField=[401, 402, 403, 404], class java.awt.List=[701, 1001, 401, 402, 403, 404, 702], class java.awt.Scrollbar=[602, 605, 604, 603, 601], class java.awt.TextArea=[401, 402, 403, 404], class java.awt.Button=[1001, 401, 402, 403, 404]} In addition to some identifying information about the run-time environment, the program displays a list of classes and the events they passed. The integers represent the event constants of the Event class; for example, Canvas received events with identifiers 504, 503, etc. The events are not sorted, so you can see the order in which they were sent. Unfortunately, you have to look up these constants in the source code yourself. The class listed as compList is the applet itself and shows you the events that the Applet class receives. |
|