Im trying to write a test case for a webservice and could use a nudge. This is probably a VERY basic concept that I am missing. Any assistance is appreciated.

Here is the psuedo webservice that I have built:

global class theWS {
 	 
 	 global class RequestArguments {
	 	webservice string AValue;
	 }
 	 
 	 global class ResponseArguments {
 	 	webservice string AID;
 	 	webservice string AName;
 	 }
	 
 	 webservice static ResponseArguments[] DescribeObject(RequestArguments Request) {
 	 	
 	 	List<ResponseArguments> bList = new List<ResponseArguments>();
 	 	
 	 	if(Request.AValue != null){
 	 		
			List<MyObject__c> bList = new List<MyObject__c>([SELECT ID, 
						Name									
						FROM MyObject
						where Name = :Request.AValue
						LIMIT 1]);
										
				for (Integer i=0;i<buildList.size();i++) {
				  ResponseArguments ra = new ResponseArguments();
				  ra.AID = buildList.get(i).ID;
				  ra.AName = buildList.get(i).Name;
				  bList.add(ra);
				}
			
 	 	} 
	 	return bList;
	 }
}

 Here is my test case thus far (my question is below):

@isTest
private class Test_theWS {

    static testMethod void test_SimpleRequest() {

        
        theWS.RequestArguments reqArgs = new theWS.RequestArguments(); 
        reqArgs.AValue = 'A';
        
        List<theWS.ResponseArguments> blist = theWS.DescribeObject(reqArgs);

	system.assert(true, bList.size() > 0);
  
    }
}

 QUESTION: Im trying to assign "A" value to reqArgs.AValue, but it doesn't appear to be getting passed in the collection following (DescribeObject(reqArgs)). How do I properly assign a value to reqArgs.AValue?

Thanks ahead of time!