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Creating repeatable tests for BizTalk maps is frustrating. I can't find a way to handle testing them like I'd do unit testing, because I can't find ways to break them into logical chunks. They tend to be one big monolithic unit, and any change has the potential to ripple through the map and break a lot of unit tests. Even if I could break it up, creating XML test inputs is painful and error prone.

Is there any effective way of testing these? I'd settle for recommendations for testing XSL transforms in general, but I specifically mention BizTalk maps primarily for the reason that when using the mapper, there really isn't any way to break your XSLT into templates (which I'd imagine you could use to break up your logic into testable chunks, but I've honestly never gotten that far with XSLT).

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Hmm... We have a few hundred BizTalk unit tests where I work, but I've never worked on them myself. I'll see if I can get the guy who normally writes them to post or point me to them. –  Steve Evers Feb 24 '12 at 16:22

1 Answer 1

I'm not an expert on BizTalk, but I made some unit tests for XSLT. I found several ways to do it.

  1. Creating some XML that represent the usual data.
  2. Developing a reverse tool (from XSLT output to significant XML data) and then testing XSLT over a big amount of XML (e.g. monthly invoicing, integration messaging, etc.). If you can obtain the significant part of the XML you are in the good way. This test can be presented to a customer to ensure that the XSLT was made correctly.

We use the way 1 to develop XSLT and the way 2 to test XSLT.

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