[jira] [Created] (DAFFODIL-2815) Implement Schema Coverage Test Tool in Daffodil

["Olabusayo Kilo (Jira)" <ji...@apache.org>]

Olabusayo Kilo created DAFFODIL-2815:
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             Summary: Implement Schema Coverage Test Tool in Daffodil
                 Key: DAFFODIL-2815
                 URL: https://issues.apache.org/jira/browse/DAFFODIL-2815
             Project: Daffodil
          Issue Type: Improvement
            Reporter: Olabusayo Kilo


It would be nice if there was a way for daffodil to report how much of a schema is represented by TDML tests.

 

Possible Solutions:
 # for each TRD structure we'd keep a parse and unparse bit in a hash table. At the end of a parse/unparse cycle we could look at all those bits and see what is not touched.
 # I wonder if there are existing code coverage libraries or file formats we could use? I'm not sure how specific they are to actual programming languages or if it's just like "line X in file Y was hit" kind of thing--information that we already have in the InfosetInputter/Outputters and TRDs. It would be nice if we don't need to reinvent the wheel, especially if we could take advantage of tools that can make visual representations and code coverage analysis.

I also wonder if maybe there's an approach similar to java debugging and how I _think_ code coverage works in Java, where we just enable a "java agent"? This could modify byte code (e.g. of an InfosetInputter/Outputter) to call functions at the appropriate time to create the code coverage reports without ever having to modify Daffodil itself--sort of a pluggable code coverage thing.



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