[Launchpad-dev] Bzr plugin for guessing relevant test modules: Fault line

[vila]

>>>>> Aaron Bentley <aaron at aaronbentley.com> writes:

    > On 11-06-01 07:11 AM, John Arbash Meinel wrote:
    >> You could consider doing stuff with 'coverage' to do the opposite
    >> method. Which is to run each test and find what files it exercises. Then
    >> link them up in reverse. However, that is probably a lot slower anyway.

    > It sounds like an interesting alternative approach.  I think both
    > approaches are flawed, but better than nothing.

Yup. I've been thinking about the coverage-based approach for quite some
time: run each test in isolation, establish which lines are covered,
then, from a diff, for each line modified, add the corresponding tests.

There is quite a high price to pay upfront but then the increments
should reasonably fast to calculate and reasonably accurate. But I won't
bet this could replace a full test suite run.

I think your approach, while being more fuzzy is also more pragmatic and
should give strong and pretty good hints. 

Thanks for that,

       Vincent