IExternalDependencyLoader throws a null pointer RTE

Question

I'm trying to implement an async data loader as explained on the wiki. http://docs.flexunit.org/index.php?title=Using_External_Data_for_Parameterized_Testing_And _Theories#Custom_External_Dependency_Loader_example
The test class is as follow.
[RunWith("org.flexunit.runners.Parameterized")]
public class TestExternalLoading {
     public static var dataRetriever:IExternalDependencyLoader = new ExternalDependencyLoader("books_catalog.xml");
     [Parameters(loader="dataRetriever")]
     public static var dataProvider:Object;
     [Test(dataProvider="dataProvider")]
     public function testDataLoaded():void {
          assertNotNull(dataProvider); //FAIL
I've changed the ExternalDependencyLoader class in order to load an XML file via HTTP.  The file is loaded fine, but  myToken.notifyResult(event.result) ,inside ExternalDependencyLoader, method call fail.
Anyone here can use this new API successfully?

Answer 1

Excelent! It worked.
Here is me DataLoader class.
public class XMLExternalDataLoader implements IExternalDependencyData {
private var myToken:ExternalDependencyToken;
private var my_loader:HTTPService;
private var _data:Array;
* @param url the file you want to load
* @param resultFormat the format used by the HTTPService
public function XMLExternalDataLoader(url:String, resultFormat:String = "object") {
myToken = new ExternalDependencyToken();
my_loader = new HTTPService();
my_loader.addEventListener(ResultEvent.RESULT, httpResultHandler);
my_loader.addEventListener(FaultEvent.FAULT, httpFaultHandler);
my_loader.resultFormat = resultFormat;
my_loader.url = url;
* @inheritDoc
public function get data():Array {
return _data;
* The fault handler
* @param event
protected function httpFaultHandler(event:FaultEvent):void {
myToken.notifyFault(event.fault.toString());
protected function httpResultHandler(event:ResultEvent):void {
_data = [[event.result]];
myToken.notifyResult(_data);
public function retrieveDependency(testClass:Class):ExternalDependencyToken {
my_loader.send();
return myToken;
And this is the implementation.
[RunWith("org.flexunit.runners.Parameterized")]
public class ConfigTest {
     public static var configLoader:IExternalDependencyData = new XMLExternalDataLoader("config.xml");
     [Test(dataProvider="configLoader")]
     public function testConfigNotNull(value:Object):void {
          //value is the same as resultEvent.result.
          assertNotNull(value);
And a final question:!
Is possible to return an object instead of an array of array containing the result.?
This work "_data = [[event.result]];" but not in this way "_data = event.result".   //unable to convert.. Object to Array, etc.
Thanks.!