tests/test-match.py

hbisect: use a revset for ancestor calculation

Since we have revsets we can be more concise in doing the ancestor calulcation.
Significant commits are all descendent of the topmost good commits.

Test Plan:
    python run-tests.py test-bisect*

Differential Revision: https://phab.mercurial-scm.org/D1498

from __future__ import absolute_import

import unittest

import silenttestrunner

from mercurial import (
    match as matchmod,
)

class NeverMatcherTests(unittest.TestCase):

    def testVisitdir(self):
        m = matchmod.nevermatcher('', '')
        self.assertFalse(m.visitdir('.'))
        self.assertFalse(m.visitdir('dir'))

if __name__ == '__main__':
    silenttestrunner.main(__name__)