How to Test RFC to HTTP_AAE synchronous scenario in SAP PI 7.3

Dear Experts/Friends,

I am designing a technical document for RFC to HTTP_AAE scenario for one of my customer, I have decided to use HTTP_AAE adapter at receiver side because the third party is not capable to provide wsdl file.  I need to import a custom RFC (payment req) from ECC (FI/CO) and PI converts to XML and then post this XML to a secure (HTTPS) target URL provided by bank, and bank will send the response back in XML format to PI, and PI will send it to ECC(FI/CO) to update the status about the each transaction.

Below are the detail steps I am considering to design this scenario, as per the above requirement please correct me if I am doing anything wrong here. I have few question as which I have posted at the end.

1- SDL configuration

1. a- Create Product and software component
2. b- Create one technical system of type (web as ABAP) and also the business system for sender side
3. c- Create another technical system of type (third party) and business system for Receiver side

2- Configuration at ECC(R/3) side

Create an RFC destination of type TCP/IP in ECC and provide the host name service and program id etc and maintain the same in sender RFC adapter

2- ESR configuration

|-Receiver side (inbound)

1. a- Create http request and response data types and message types
2. b- Create service interface (synchronous)
3. c- Create message mapping between HTTP response to RFC response
4. d- Create operation mapping for the request and response

||-Sender side (outbound)

1. a- import the custom RFC in PI
2. b- Create message mapping between RFC request to HTTP request
3. c- Operation mapping has been created

3- Integration directory Configuration

• Create the RFC sender communication channel
• Create HTTP_AAE receiver communication channel
• Create sender agreement, receiver agreement, interface determination and receiver determination

Questions

1- How can I test this scenario? Any tool which can take the HTTP request and sends back the response for some dummy data. My actual scenario involves SSL configuratin but I want to just test over http only, I have followed the below link by William Li , but could not understand it fully how to utilize this.

http://scn.sap.com/people/william.li/blog/2007/09/07/posting-and-testing-using-xipi-http-adapter

2-  Do I need to create 3 communication channel and 2 sets of sender agreement, receiver agreement, interface determination and receiver determination for this scenario? I have gone through the below thread, where it’s mentioned this scenario required 3 communication channel. Please clarify

http://scn.sap.com/thread/53784

Thanks,

Farhan