General Overview

This section presents an overview of the mandatory elements for the use of Int4 IFTT on a non-SAP middleware platform. Before the regression testing starts, there are several elements that Int4 IFTT requires to create and execute test cases. As you can see on the diagram below, the testing is separated into two parts. So let us have a look at each part's details to make clear what exact steps are performed.

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Before Testing

Think of any process, and it has a connector to receive input messages. Then the processing logic manipulates the input message according to the requirements. Finally, at the end of your process, another connector sends the messages to SAP ECC or the S/4HANA system.
To perform regression testing and validate the processing logic, we need to take an already successfully processed input message, re-run it and compare the outputs.
For that purpose, before testing, Int4 IFTT needs to receive both input and output message payloads.

Technical Preparation Steps

As shown on the diagram, Int4 IFTT requires the logging of payloads before processing (exactly after the start connector) and after the processing logic (before the send connector).
In many cases, the payload logging is already implemented in the original processes. In that case, the current common logic for logging can be reused, and just in the logging process needs to be modified to call a Payload Persistence Process that will save the payload to Int4 IFTT.
Otherwise, when there is no logging mechanism on your processes, the persistence for payloads must be provided by changing the initial processes.

The Testing

During test case execution, Int4 IFTT can inject the input message into the correct Dell Boomi process. This feature is handled by an additional process called Int4 IFTT Dispatcher. After the message enters the original process, it gets processed as usual. At this step, we will also need the payloads before and after processing. In the same way like before testing, the message payloads will be stored in Int4 IFTT and will get compared accordingly. Finally, you end up with the Int4 IFTT Test Results Report.

Technical Preparation Steps

To achieve the injection of the input messages into the corresponding process, an additional process called Int4 IFTT Dispatcher is required. The Dispatcher is a process that allows virtualizing the sender systems by sending the messages to the original processes.
Inside the Dispatcher, there needs to be configured a corresponding routing logic for the processes that will be tested. To complete the Dispatcher routing, Int4 IFTT provides additional details on HTTP custom headers together with the input message, so the Dispatcher knows which process needs to be called.