New testing framework

[Greg Ward]

On Fri, Jun 11, 2010 at 12:07 PM, Adrian Buehlmann <adrian at cadifra.com> wrote:
> It would really love to see a testsuite that's easier to get running on
> Windows than

That's my main goal.  (Making it easier to understand and modify the
tests is a close second.)  It's working reasonably well; porting the
bfiles tests to hgtest actually found a couple of bfiles bugs.

One annoyance: I have some test code that is obviously Unix-specific, e.g.

if os.name == 'posix':
    hgt.announce('bfupdate respects umask')
    os.remove('sub/big3')
    umask = os.umask(077)
    try:
        hgt.hg(['bfupdate', 'sub'],
               stdout='1 big files updated, 0 removed\n')
    finally:
        os.umask(umask)
    mode = os.stat('sub/big3').st_mode & 0777
    hgt.assertequals(0700, mode, 'sub/big3: mode')

When I run this test script on Windows with --debug, it's fine: the
Unix-specific code is silently skipped.  But when I let run-tests.py
diff the output, it fails, because it no longer prints the output of
this test.

I think this is just another indication that diffing output is silly
with hgtest.  But there's no point modifying run-tests.py to disable
the diff if hgtest is only going to be used by bfiles.  I want hgtest
to be useful for Mercurial itself, and that's why I need people to go
bang on it a bit.

Greg