MACROMEDIA FLEX 2-TESTING FLEX APPLICATIONS WITH MERCURY QUICKTEST PROFESSIONAL Instrukcja Użytkownika Pobierz pdf (Strona 9)

488Debugging

But for more complex objects like

ArrayCollection

s, the

ObjectUtil

ActionScript

class has a

toString()

function that takes a reference of any other object and con-

verts it to a string.

In listing 23.3, the

ObjectUtil

class is used to display all the items in an

Array-

Collection

<?xml version="1.0" encoding="utf-8"?>

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"

creationComplete="trace(ObjectUtil.toString(myAC))">

<mx:Script>

<![CDATA[

import mx.collections.ArrayCollection;

import mx.utils.ObjectUtil;

public var myAC:ArrayCollection = new ArrayCollection([

{label:"Jon Hirschi", data:"jhirschi"},

{label:"Tariq Ahmed", data:"tahmed"},

{label:"Frank Krul", data:"fkrul"}

] ) ;

] ] >

</mx:Script>

</mx:Application>

This code produces something like the log file shown in listing 23.4.

(mx.collections::ArrayCollection)#0

filterFunction = (null)

length = 3

list = (mx.collections::ArrayList)#1

length = 3

source = (Array)#2

[0] (Object)#3

data = "jhirschi"

label = "Jon Hirschi"

[1] (Object)#4

data = "tahmed"

label = "Tariq Ahmed"

[2] (Object)#5

data = "fkrul"

label = "Frank Krul"

uid = "70528450-89C6-9120-D5D4-847C1D8C3B70"

sort = (null)

source = (Array)#2

Another popular approach shows the value on screen via the

Alert.show()

function,

instead of dumping it to a log file. Here’s an example:

Alert.show(ObjectUtil.toString(myAC))

Listing 23.3 Using ObjectUtil to dump an object’s properties

Listing 23.4 Sample output from ObjectUtil

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 26 27

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