MACROMEDIA FLEX 2-TESTING FLEX APPLICATIONS WITH MERCURY QUICKTEST PROFESSIONAL Bedienungsanleitung PDF herunterladen (Seite 11)

490Debugging

When you launch your application using the Debug but-

ton (see figure 23.2), all network traffic appears in the

Console view.

This feature is considered anemic and underpowered.

Fortunately, a number of third-party tools do an amazing

job of speeding up the debugging process:

■

ServiceCapture—One of the best tools out there.

Not only does it understand Flash’s native

AMF Remote object protocol, but it

deciphers web service

SOAP and JSON-RPC. Its interactive nature lets you see

what parameters were passed to remote functions and what the data looked like

coming back in real time. Price: $35

U.S. http://kevinlangdon.com/serviceCap-

ture/.

■

Charles Web Debugging Proxy (CWDP)—A well-polished product loaded with fea-

tures. It provides protocol support similar to ServiceCapture, but it also does

bandwidth throttling to simulate network connection speed, and you can

export the results to a

CSV file. It’s available on multiple platforms but requires

the Sun Java

JDK to be installed. Price: $50 U.S. http://xk72.com/charles/

index.php.

Moving onto the heavyweight tool of debugging, let’s look at the Debugger that comes

with Flex Builder, a feature that came to maturity with Flex 3.

23.1.8 Using the Debugger

If you’ve reached a point where you need to see how things are changing and you also

need fine-grained control, the Debugger is the way to go. It helps you isolate where

issues are by allowing you to step through your code in a controlled manner and see

how variables change as the code executes.

The tool works by launching in Debug mode, setting breakpoints to pause execu-

tion, then adding variables to watch.

LAUNCHING DEBUG MODE

Enabling the Debugger is similar to how you’ve been launching your applications thus

far, except in this case you use the Debug button (refer back to figure 23.2).

Notice that along with the bin folder, there’s also bin-debug—this is the folder to

which Flex Builder publishes a debug version of your application. When you click the

Debug button, this version is launched.

If Flex Builder hasn’t done so already, switch to the Debug perspective in Flex

Builder by choosing Window > Perspective > Flex Debugging. You’ll see a number of

views, including the following:

■

Debug —Where you are in the application

■

Variables —An area where you can watch the values of all the variables Flex is

managing

Figure 23.2 You'll find the

Debug button on the Flex

Builder toolbar.

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