Inasmuch as a suite of Schematron tests contains many contexts where a bug in a document will make a Schematron assert fail or a report succeed, it follows that for any new test suite and any reasonably sized but buggy document set, there will straight away be many assert and report messages produced by the tests. When that happens, how can you be sure your Schematron tests all worked as expected? How can you separate the expected results from the unexpected? What’s needed is a way to characterise the Schematron tests before you start as reporting only what they should, no more, and no less.
stf (https://github.com/MenteaXML/stf) is a XProc pipeline that runs a Schematron test suite on test documents (that you create) and winnows out the expected results and report just the unexpected. stf uses a processing instruction (PI) in each of a set of (typically, small) test documents to indicate the test’s expected asserts and reports: the expected results are ignored, and all you see is what’s extra or missing. And when you have no more unexpected results from your test documents, you’re ready to use the Schematron on your real documents. Continue reading “Schematron Testing Framework”