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489 CHAPTER 23 Debugging and testing
Using this technique and the Flash log file can get you reasonably far, but to take your
game to a new level, you’ll want more advanced tooling.
23.1.6 FxSpy
FxSpy (a.k.a. Flex Spy) is an open source tool that allows you to inspect your compo-
nents and see what their properties and styles are set to, while allowing you to manip-
ulate many of these items (see figure 23.1).
This tool is particularly handy when you want to tinker with properties that affect the
visual aspects of the application. This can save you time compared to making changes
in the code and having to recompile constantly to test those changes.
You can download this free tool at http://code.google.com/p/fxspy/.
The tools mentioned so far cater to the front end, but monitoring the back end
also becomes vital when you need to know what’s going over the wire.
23.1.7 Monitoring network activity
One of the most challenging things you’ll encounter when developing Flex applica-
tions is trying to figure out why communications with a back-end data service (such as
a web service or remote object) doesn’t seem to be working. Yes, you can specify fault
handlers to handle exceptions, but that may not be enough.
Flex Builder has a built-in ability to monitor network activity. This is facilitated by
adding
<mx:TraceTarget/>
to your application, as shown in listing 23.5.
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
<mx:TraceTarget/>
. . .
. . .
</mx:Application>
Listing 23.5 Using the TraceTarget component to monitor network activity
Figure 23.1 FxSpy allows you to
browse and inspect components and
their properties.
- SAMPLE CHAPTER 1
- Flex 3 in Action 2
- BRIEF CONTENTSvi 4
- Debugging and testing 5
- 23.1 Debugging 6
- 486Debugging 7
- 23.1.4 Trace-log viewers 8
- ObjectUtil 9
- 23.1.6 FxSpy 10
- 23.1.8 Using the Debugger 11
- 3 Select Toggle Breakpoint 12
- 2 Select Watch 13
- 2 Watch the 14
- 23.2.2 Flex Profiler 15
- SWF file 16
- 496Testing 17
- TestSuite 18
- 23.2.4 Fluint (unit testing) 21
- Add test 22
- U.S. and 24
- 23.3 Summary 26
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