[RFC] Changes to 'selftest --starting-with'

[John Arbash Meinel]

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I've been using 'bzr selftest -s' a lot lately, and wanted to propose some
updates. For starters I'd like to say it has been great to use so far. Thanks
a lot to Vincent for implementing it. TDD is a lot easier when the
startup+run+teardown time is seconds rather than almost a minute.

There are a few small issues that I'd like to bring up:

1) Running 2 modules. For some commands I'd like to do something like:

  bzr selftest -s bzrlib.tests.test_command \
      -s bzrlib.tests.blackbox.test_command

aka, run both the blackbox tests and the direct tests. At the moment, I just
run it twice, which is ok. And I can do "foo ; blackboxfoo" so they chain but
it isn't quite as nice.

2) The prefixes are rather long. Having to type out 'bzrlib.tests.' all the
time. I know Vincent wanted to play with it a bit and see what worked for him.
My proposal would be to use something like:

 bzr selftest -s B.T.test_command

So the single capital letters would be used as abbreviations. The current
supported ones would be:
  B. => bzrlib.
  B.T. => bzrlib.tests.
  B.P. => bzrlib.plugins.
  B.T.B. => bzrlib.tests.blackbox.

I think that covers all the major prefixes. Obviously you can argue for stuff
like "B.T.BI. => bzrlib.tests.branch_implementations."

Another possible route is to make the whole thing an alias, and instead have:

BT. => bzrlib.tests.
BP. => bzrlib.plugins.
BTB. => bzrlib.tests.blackbox.

Either would be fine with me. Or if we wanted to do:

:BT. => bzrlib.tests.

To look something like the ":parent" that we use for other aliases.

Anyone else have ideas?

John
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