This is the list of flex testing frameworks Which I came Across

FlexUnit (Adobe Open Source)
FlexPMD (Adobe Technical Services)
Funit (Open Source)
asUnit (Open Source)
fluint (Open Source)
FlexMonkey (Open Source)
Selenium (Open Source)
FlashSelenium (Open Source)
HP QuickTest Professional 9.5
mock-as3 (Open Source)
FlexCover (Open Source)
FunFX
Mock4AS
ASMock
Mockito

This code show how to use TextElement, TextBlock, FontDescription, TextBlock, TextLine

package druva{
import flash.display.Sprite;
import flash.text.engine.*;

public class TextTest extends Sprite {

public function TextTest() {

for (var j:int=0; j<=10; j++) {
var myString:String="Druva";
var myFormat:ElementFormat = new ElementFormat();

var myFontDesc:FontDescription=new FontDescription('Georgia','normal','italic','device');
myFormat.fontSize=2+2*j;
myFormat.fontDescription=myFontDesc;
myFormat.color = Math.random() * 0xFFFFEE;

var textElement:TextElement=new TextElement(myString, myFormat);
var textBlock:TextBlock = new TextBlock();
textBlock.content=textElement;

var myTextLine:TextLine=textBlock.createTextLine(null,300);

myTextLine.x = 30+(3*(j*(j+1)/2));
myTextLine.y = 150;

addChild(myTextLine);
myTextLine.addEventListener(Event.ENTER_FRAME, onLoop);
}

}
import flash.events.*;
private function onLoop(e:Event) {
e.currentTarget.rotationY += 3;
e.currentTarget.rotation = mouseX;
}
}
}

background image for AIR application

<?xml version="1.0" encoding="utf-8"?>
<mx:WindowedApplication name="WindowedApplication_backgroundImage_test"
        xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" verticalAlign="middle">

    <mx:Style>
        WindowedApplication {
            backgroundColor: white;
            backgroundImage: ClassReference("mx.skins.halo.ApplicationBackground");
        }
    </mx:Style>

</mx:WindowedApplication>