view tests/test-match.py @ 47315:825d5a5907b4

exewrapper: avoid directly linking against python3X.dll

Subsequent code calls `LoadLibrary()` to attempt to load the DLL, but because of
this symbol reference, there is an attempt to load the DLL used during the build
prior to `_main()` running.  This causes the whole process to fail if the DLL
isn't in the standard search path.  That also means it will never load the DLL
for HackableMercurial.  (Maybe we should get rid of that for py3, since you can
install python for a user without admin rights?)

This could also be resolved by calling `GetProcAddress()` on the symbol and
dereferencing it, but using the environment variable is consistent with the
*.bat file since fc8a5c9ecee0.  (The environment variable persists after the
interpreter is initialized.)

Far more concerning is somehow I've gotten my system into a state where setting
the flag causes any output to the pager to be lost (as if it wasn't set at all)
in MSYS, cmd.exe, WSL, and PowerShell using py3.9.0, but the environment
variable works properly.  I'm sure this flag worked on some versions of py3, so
I'm not sure what's going on here.  This is might be related to init config
related changes in 3.8[1], since it works with 3.7.8, but fails with 3.8.1.
Somebody who understands encoding issues better than I do should give some
thought to if we need to make some changes to our encoding strategy on Windows
with py3.

With or without the flag/envvar, there is proper output if the command is
directly paged by piping to `more.com` (in any environment) or `less` (in MSYS
and WSL), or if paging is disabled with `--pager=no`.  Legacy mode is required
though when Mercurial decides to spin up a pager.

[1] https://bugs.python.org/issue41941

Differential Revision: https://phab.mercurial-scm.org/D10756

from __future__ import absolute_import

import unittest

import silenttestrunner

from mercurial import (
    match as matchmod,
    util,
)


noop_auditor = lambda name: None


class BaseMatcherTests(unittest.TestCase):
    def testVisitdir(self):
        m = matchmod.basematcher()
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))

    def testVisitchildrenset(self):
        m = matchmod.basematcher()
        self.assertEqual(m.visitchildrenset(b''), b'this')
        self.assertEqual(m.visitchildrenset(b'dir'), b'this')


class AlwaysMatcherTests(unittest.TestCase):
    def testVisitdir(self):
        m = matchmod.alwaysmatcher()
        self.assertEqual(m.visitdir(b''), b'all')
        self.assertEqual(m.visitdir(b'dir'), b'all')

    def testVisitchildrenset(self):
        m = matchmod.alwaysmatcher()
        self.assertEqual(m.visitchildrenset(b''), b'all')
        self.assertEqual(m.visitchildrenset(b'dir'), b'all')


class NeverMatcherTests(unittest.TestCase):
    def testVisitdir(self):
        m = matchmod.nevermatcher()
        self.assertFalse(m.visitdir(b''))
        self.assertFalse(m.visitdir(b'dir'))

    def testVisitchildrenset(self):
        m = matchmod.nevermatcher()
        self.assertEqual(m.visitchildrenset(b''), set())
        self.assertEqual(m.visitchildrenset(b'dir'), set())


class PredicateMatcherTests(unittest.TestCase):
    # predicatematcher does not currently define either of these methods, so
    # this is equivalent to BaseMatcherTests.

    def testVisitdir(self):
        m = matchmod.predicatematcher(lambda *a: False)
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))

    def testVisitchildrenset(self):
        m = matchmod.predicatematcher(lambda *a: False)
        self.assertEqual(m.visitchildrenset(b''), b'this')
        self.assertEqual(m.visitchildrenset(b'dir'), b'this')


class PatternMatcherTests(unittest.TestCase):
    def testVisitdirPrefix(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'path:dir/subdir']
        )
        assert isinstance(m, matchmod.patternmatcher)
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))
        self.assertEqual(m.visitdir(b'dir/subdir'), b'all')
        # OPT: This should probably be 'all' if its parent is?
        self.assertTrue(m.visitdir(b'dir/subdir/x'))
        self.assertFalse(m.visitdir(b'folder'))

    def testVisitchildrensetPrefix(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'path:dir/subdir']
        )
        assert isinstance(m, matchmod.patternmatcher)
        self.assertEqual(m.visitchildrenset(b''), b'this')
        self.assertEqual(m.visitchildrenset(b'dir'), b'this')
        self.assertEqual(m.visitchildrenset(b'dir/subdir'), b'all')
        # OPT: This should probably be 'all' if its parent is?
        self.assertEqual(m.visitchildrenset(b'dir/subdir/x'), b'this')
        self.assertEqual(m.visitchildrenset(b'folder'), set())

    def testVisitdirRootfilesin(self):
        m = matchmod.match(
            util.localpath(b'/repo'),
            b'',
            patterns=[b'rootfilesin:dir/subdir'],
        )
        assert isinstance(m, matchmod.patternmatcher)
        self.assertFalse(m.visitdir(b'dir/subdir/x'))
        self.assertFalse(m.visitdir(b'folder'))
        # FIXME: These should probably be True.
        self.assertFalse(m.visitdir(b''))
        self.assertFalse(m.visitdir(b'dir'))
        self.assertFalse(m.visitdir(b'dir/subdir'))

    def testVisitchildrensetRootfilesin(self):
        m = matchmod.match(
            util.localpath(b'/repo'),
            b'',
            patterns=[b'rootfilesin:dir/subdir'],
        )
        assert isinstance(m, matchmod.patternmatcher)
        self.assertEqual(m.visitchildrenset(b'dir/subdir/x'), set())
        self.assertEqual(m.visitchildrenset(b'folder'), set())
        # FIXME: These should probably be {'dir'}, {'subdir'} and 'this',
        # respectively, or at least 'this' for all three.
        self.assertEqual(m.visitchildrenset(b''), set())
        self.assertEqual(m.visitchildrenset(b'dir'), set())
        self.assertEqual(m.visitchildrenset(b'dir/subdir'), set())

    def testVisitdirGlob(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'glob:dir/z*']
        )
        assert isinstance(m, matchmod.patternmatcher)
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))
        self.assertFalse(m.visitdir(b'folder'))
        # OPT: these should probably be False.
        self.assertTrue(m.visitdir(b'dir/subdir'))
        self.assertTrue(m.visitdir(b'dir/subdir/x'))

    def testVisitchildrensetGlob(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'glob:dir/z*']
        )
        assert isinstance(m, matchmod.patternmatcher)
        self.assertEqual(m.visitchildrenset(b''), b'this')
        self.assertEqual(m.visitchildrenset(b'folder'), set())
        self.assertEqual(m.visitchildrenset(b'dir'), b'this')
        # OPT: these should probably be set().
        self.assertEqual(m.visitchildrenset(b'dir/subdir'), b'this')
        self.assertEqual(m.visitchildrenset(b'dir/subdir/x'), b'this')


class IncludeMatcherTests(unittest.TestCase):
    def testVisitdirPrefix(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        assert isinstance(m, matchmod.includematcher)
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))
        self.assertEqual(m.visitdir(b'dir/subdir'), b'all')
        # OPT: This should probably be 'all' if its parent is?
        self.assertTrue(m.visitdir(b'dir/subdir/x'))
        self.assertFalse(m.visitdir(b'folder'))

    def testVisitchildrensetPrefix(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        assert isinstance(m, matchmod.includematcher)
        self.assertEqual(m.visitchildrenset(b''), {b'dir'})
        self.assertEqual(m.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(m.visitchildrenset(b'dir/subdir'), b'all')
        # OPT: This should probably be 'all' if its parent is?
        self.assertEqual(m.visitchildrenset(b'dir/subdir/x'), b'this')
        self.assertEqual(m.visitchildrenset(b'folder'), set())

    def testVisitdirRootfilesin(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir/subdir']
        )
        assert isinstance(m, matchmod.includematcher)
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))
        self.assertTrue(m.visitdir(b'dir/subdir'))
        self.assertFalse(m.visitdir(b'dir/subdir/x'))
        self.assertFalse(m.visitdir(b'folder'))

    def testVisitchildrensetRootfilesin(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir/subdir']
        )
        assert isinstance(m, matchmod.includematcher)
        self.assertEqual(m.visitchildrenset(b''), {b'dir'})
        self.assertEqual(m.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(m.visitchildrenset(b'dir/subdir'), b'this')
        self.assertEqual(m.visitchildrenset(b'dir/subdir/x'), set())
        self.assertEqual(m.visitchildrenset(b'folder'), set())

    def testVisitdirGlob(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'glob:dir/z*']
        )
        assert isinstance(m, matchmod.includematcher)
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))
        self.assertFalse(m.visitdir(b'folder'))
        # OPT: these should probably be False.
        self.assertTrue(m.visitdir(b'dir/subdir'))
        self.assertTrue(m.visitdir(b'dir/subdir/x'))

    def testVisitchildrensetGlob(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'glob:dir/z*']
        )
        assert isinstance(m, matchmod.includematcher)
        self.assertEqual(m.visitchildrenset(b''), {b'dir'})
        self.assertEqual(m.visitchildrenset(b'folder'), set())
        self.assertEqual(m.visitchildrenset(b'dir'), b'this')
        # OPT: these should probably be set().
        self.assertEqual(m.visitchildrenset(b'dir/subdir'), b'this')
        self.assertEqual(m.visitchildrenset(b'dir/subdir/x'), b'this')


class ExactMatcherTests(unittest.TestCase):
    def testVisitdir(self):
        m = matchmod.exact(files=[b'dir/subdir/foo.txt'])
        assert isinstance(m, matchmod.exactmatcher)
        self.assertTrue(m.visitdir(b''))
        self.assertTrue(m.visitdir(b'dir'))
        self.assertTrue(m.visitdir(b'dir/subdir'))
        self.assertFalse(m.visitdir(b'dir/subdir/foo.txt'))
        self.assertFalse(m.visitdir(b'dir/foo'))
        self.assertFalse(m.visitdir(b'dir/subdir/x'))
        self.assertFalse(m.visitdir(b'folder'))

    def testVisitchildrenset(self):
        m = matchmod.exact(files=[b'dir/subdir/foo.txt'])
        assert isinstance(m, matchmod.exactmatcher)
        self.assertEqual(m.visitchildrenset(b''), {b'dir'})
        self.assertEqual(m.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(m.visitchildrenset(b'dir/subdir'), {b'foo.txt'})
        self.assertEqual(m.visitchildrenset(b'dir/subdir/x'), set())
        self.assertEqual(m.visitchildrenset(b'dir/subdir/foo.txt'), set())
        self.assertEqual(m.visitchildrenset(b'folder'), set())

    def testVisitchildrensetFilesAndDirs(self):
        m = matchmod.exact(
            files=[
                b'rootfile.txt',
                b'a/file1.txt',
                b'a/b/file2.txt',
                # no file in a/b/c
                b'a/b/c/d/file4.txt',
            ]
        )
        assert isinstance(m, matchmod.exactmatcher)
        self.assertEqual(m.visitchildrenset(b''), {b'a', b'rootfile.txt'})
        self.assertEqual(m.visitchildrenset(b'a'), {b'b', b'file1.txt'})
        self.assertEqual(m.visitchildrenset(b'a/b'), {b'c', b'file2.txt'})
        self.assertEqual(m.visitchildrenset(b'a/b/c'), {b'd'})
        self.assertEqual(m.visitchildrenset(b'a/b/c/d'), {b'file4.txt'})
        self.assertEqual(m.visitchildrenset(b'a/b/c/d/e'), set())
        self.assertEqual(m.visitchildrenset(b'folder'), set())


class DifferenceMatcherTests(unittest.TestCase):
    def testVisitdirM2always(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.alwaysmatcher()
        dm = matchmod.differencematcher(m1, m2)
        # dm should be equivalent to a nevermatcher.
        self.assertFalse(dm.visitdir(b''))
        self.assertFalse(dm.visitdir(b'dir'))
        self.assertFalse(dm.visitdir(b'dir/subdir'))
        self.assertFalse(dm.visitdir(b'dir/subdir/z'))
        self.assertFalse(dm.visitdir(b'dir/foo'))
        self.assertFalse(dm.visitdir(b'dir/subdir/x'))
        self.assertFalse(dm.visitdir(b'folder'))

    def testVisitchildrensetM2always(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.alwaysmatcher()
        dm = matchmod.differencematcher(m1, m2)
        # dm should be equivalent to a nevermatcher.
        self.assertEqual(dm.visitchildrenset(b''), set())
        self.assertEqual(dm.visitchildrenset(b'dir'), set())
        self.assertEqual(dm.visitchildrenset(b'dir/subdir'), set())
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/z'), set())
        self.assertEqual(dm.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/x'), set())
        self.assertEqual(dm.visitchildrenset(b'folder'), set())

    def testVisitdirM2never(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.nevermatcher()
        dm = matchmod.differencematcher(m1, m2)
        # dm should be equivalent to a alwaysmatcher.
        #
        # We're testing Equal-to-True instead of just 'assertTrue' since
        # assertTrue does NOT verify that it's a bool, just that it's truthy.
        # While we may want to eventually make these return 'all', they should
        # not currently do so.
        self.assertEqual(dm.visitdir(b''), b'all')
        self.assertEqual(dm.visitdir(b'dir'), b'all')
        self.assertEqual(dm.visitdir(b'dir/subdir'), b'all')
        self.assertEqual(dm.visitdir(b'dir/subdir/z'), b'all')
        self.assertEqual(dm.visitdir(b'dir/foo'), b'all')
        self.assertEqual(dm.visitdir(b'dir/subdir/x'), b'all')
        self.assertEqual(dm.visitdir(b'folder'), b'all')

    def testVisitchildrensetM2never(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.nevermatcher()
        dm = matchmod.differencematcher(m1, m2)
        # dm should be equivalent to a alwaysmatcher.
        self.assertEqual(dm.visitchildrenset(b''), b'all')
        self.assertEqual(dm.visitchildrenset(b'dir'), b'all')
        self.assertEqual(dm.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/z'), b'all')
        self.assertEqual(dm.visitchildrenset(b'dir/foo'), b'all')
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/x'), b'all')
        self.assertEqual(dm.visitchildrenset(b'folder'), b'all')

    def testVisitdirM2SubdirPrefix(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'path:dir/subdir']
        )
        dm = matchmod.differencematcher(m1, m2)
        self.assertEqual(dm.visitdir(b''), True)
        self.assertEqual(dm.visitdir(b'dir'), True)
        self.assertFalse(dm.visitdir(b'dir/subdir'))
        # OPT: We should probably return False for these; we don't because
        # patternmatcher.visitdir() (our m2) doesn't return 'all' for subdirs of
        # an 'all' pattern, just True.
        self.assertEqual(dm.visitdir(b'dir/subdir/z'), True)
        self.assertEqual(dm.visitdir(b'dir/subdir/x'), True)
        self.assertEqual(dm.visitdir(b'dir/foo'), b'all')
        self.assertEqual(dm.visitdir(b'folder'), b'all')

    def testVisitchildrensetM2SubdirPrefix(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'path:dir/subdir']
        )
        dm = matchmod.differencematcher(m1, m2)
        self.assertEqual(dm.visitchildrenset(b''), b'this')
        self.assertEqual(dm.visitchildrenset(b'dir'), b'this')
        self.assertEqual(dm.visitchildrenset(b'dir/subdir'), set())
        self.assertEqual(dm.visitchildrenset(b'dir/foo'), b'all')
        self.assertEqual(dm.visitchildrenset(b'folder'), b'all')
        # OPT: We should probably return set() for these; we don't because
        # patternmatcher.visitdir() (our m2) doesn't return 'all' for subdirs of
        # an 'all' pattern, just 'this'.
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/z'), b'this')
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/x'), b'this')

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir']
        )
        dm = matchmod.differencematcher(m1, m2)
        self.assertEqual(dm.visitdir(b''), True)
        self.assertEqual(dm.visitdir(b'dir'), True)
        self.assertEqual(dm.visitdir(b'dir/subdir'), b'all')
        self.assertFalse(dm.visitdir(b'dir/foo'))
        self.assertFalse(dm.visitdir(b'folder'))
        # OPT: We should probably return False for these; we don't because
        # patternmatcher.visitdir() (our m2) doesn't return 'all' for subdirs of
        # an 'all' pattern, just True.
        self.assertEqual(dm.visitdir(b'dir/subdir/z'), True)
        self.assertEqual(dm.visitdir(b'dir/subdir/x'), True)

    def testVisitchildrensetIncludeInclude(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir']
        )
        dm = matchmod.differencematcher(m1, m2)
        self.assertEqual(dm.visitchildrenset(b''), {b'dir'})
        self.assertEqual(dm.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(dm.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(dm.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(dm.visitchildrenset(b'folder'), set())
        # OPT: We should probably return set() for these; we don't because
        # patternmatcher.visitdir() (our m2) doesn't return 'all' for subdirs of
        # an 'all' pattern, just 'this'.
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/z'), b'this')
        self.assertEqual(dm.visitchildrenset(b'dir/subdir/x'), b'this')


class IntersectionMatcherTests(unittest.TestCase):
    def testVisitdirM2always(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.alwaysmatcher()
        im = matchmod.intersectmatchers(m1, m2)
        # im should be equivalent to a alwaysmatcher.
        self.assertEqual(im.visitdir(b''), b'all')
        self.assertEqual(im.visitdir(b'dir'), b'all')
        self.assertEqual(im.visitdir(b'dir/subdir'), b'all')
        self.assertEqual(im.visitdir(b'dir/subdir/z'), b'all')
        self.assertEqual(im.visitdir(b'dir/foo'), b'all')
        self.assertEqual(im.visitdir(b'dir/subdir/x'), b'all')
        self.assertEqual(im.visitdir(b'folder'), b'all')

    def testVisitchildrensetM2always(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.alwaysmatcher()
        im = matchmod.intersectmatchers(m1, m2)
        # im should be equivalent to a alwaysmatcher.
        self.assertEqual(im.visitchildrenset(b''), b'all')
        self.assertEqual(im.visitchildrenset(b'dir'), b'all')
        self.assertEqual(im.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(im.visitchildrenset(b'dir/subdir/z'), b'all')
        self.assertEqual(im.visitchildrenset(b'dir/foo'), b'all')
        self.assertEqual(im.visitchildrenset(b'dir/subdir/x'), b'all')
        self.assertEqual(im.visitchildrenset(b'folder'), b'all')

    def testVisitdirM2never(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.nevermatcher()
        im = matchmod.intersectmatchers(m1, m2)
        # im should be equivalent to a nevermatcher.
        self.assertFalse(im.visitdir(b''))
        self.assertFalse(im.visitdir(b'dir'))
        self.assertFalse(im.visitdir(b'dir/subdir'))
        self.assertFalse(im.visitdir(b'dir/subdir/z'))
        self.assertFalse(im.visitdir(b'dir/foo'))
        self.assertFalse(im.visitdir(b'dir/subdir/x'))
        self.assertFalse(im.visitdir(b'folder'))

    def testVisitchildrensetM2never(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.nevermatcher()
        im = matchmod.intersectmatchers(m1, m2)
        # im should be equivalent to a nevermqtcher.
        self.assertEqual(im.visitchildrenset(b''), set())
        self.assertEqual(im.visitchildrenset(b'dir'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/z'), set())
        self.assertEqual(im.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/x'), set())
        self.assertEqual(im.visitchildrenset(b'folder'), set())

    def testVisitdirM2SubdirPrefix(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'path:dir/subdir']
        )
        im = matchmod.intersectmatchers(m1, m2)
        self.assertEqual(im.visitdir(b''), True)
        self.assertEqual(im.visitdir(b'dir'), True)
        self.assertEqual(im.visitdir(b'dir/subdir'), b'all')
        self.assertFalse(im.visitdir(b'dir/foo'))
        self.assertFalse(im.visitdir(b'folder'))
        # OPT: We should probably return 'all' for these; we don't because
        # patternmatcher.visitdir() (our m2) doesn't return 'all' for subdirs of
        # an 'all' pattern, just True.
        self.assertEqual(im.visitdir(b'dir/subdir/z'), True)
        self.assertEqual(im.visitdir(b'dir/subdir/x'), True)

    def testVisitchildrensetM2SubdirPrefix(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        im = matchmod.intersectmatchers(m1, m2)
        self.assertEqual(im.visitchildrenset(b''), {b'dir'})
        self.assertEqual(im.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(im.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(im.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(im.visitchildrenset(b'folder'), set())
        # OPT: We should probably return 'all' for these
        self.assertEqual(im.visitchildrenset(b'dir/subdir/z'), b'this')
        self.assertEqual(im.visitchildrenset(b'dir/subdir/x'), b'this')

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir']
        )
        im = matchmod.intersectmatchers(m1, m2)
        self.assertEqual(im.visitdir(b''), True)
        self.assertEqual(im.visitdir(b'dir'), True)
        self.assertFalse(im.visitdir(b'dir/subdir'))
        self.assertFalse(im.visitdir(b'dir/foo'))
        self.assertFalse(im.visitdir(b'folder'))
        self.assertFalse(im.visitdir(b'dir/subdir/z'))
        self.assertFalse(im.visitdir(b'dir/subdir/x'))

    def testVisitchildrensetIncludeInclude(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir']
        )
        im = matchmod.intersectmatchers(m1, m2)
        self.assertEqual(im.visitchildrenset(b''), {b'dir'})
        self.assertEqual(im.visitchildrenset(b'dir'), b'this')
        self.assertEqual(im.visitchildrenset(b'dir/subdir'), set())
        self.assertEqual(im.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(im.visitchildrenset(b'folder'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/z'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/x'), set())

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude2(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:folder']
        )
        im = matchmod.intersectmatchers(m1, m2)
        # FIXME: is True correct here?
        self.assertEqual(im.visitdir(b''), True)
        self.assertFalse(im.visitdir(b'dir'))
        self.assertFalse(im.visitdir(b'dir/subdir'))
        self.assertFalse(im.visitdir(b'dir/foo'))
        self.assertFalse(im.visitdir(b'folder'))
        self.assertFalse(im.visitdir(b'dir/subdir/z'))
        self.assertFalse(im.visitdir(b'dir/subdir/x'))

    def testVisitchildrensetIncludeInclude2(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:folder']
        )
        im = matchmod.intersectmatchers(m1, m2)
        # FIXME: is set() correct here?
        self.assertEqual(im.visitchildrenset(b''), set())
        self.assertEqual(im.visitchildrenset(b'dir'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir'), set())
        self.assertEqual(im.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(im.visitchildrenset(b'folder'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/z'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/x'), set())

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude3(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        im = matchmod.intersectmatchers(m1, m2)
        self.assertEqual(im.visitdir(b''), True)
        self.assertEqual(im.visitdir(b'dir'), True)
        self.assertEqual(im.visitdir(b'dir/subdir'), True)
        self.assertFalse(im.visitdir(b'dir/foo'))
        self.assertFalse(im.visitdir(b'folder'))
        self.assertFalse(im.visitdir(b'dir/subdir/z'))
        # OPT: this should probably be 'all' not True.
        self.assertEqual(im.visitdir(b'dir/subdir/x'), True)

    def testVisitchildrensetIncludeInclude3(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        im = matchmod.intersectmatchers(m1, m2)
        self.assertEqual(im.visitchildrenset(b''), {b'dir'})
        self.assertEqual(im.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(im.visitchildrenset(b'dir/subdir'), {b'x'})
        self.assertEqual(im.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(im.visitchildrenset(b'folder'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/z'), set())
        # OPT: this should probably be 'all' not 'this'.
        self.assertEqual(im.visitchildrenset(b'dir/subdir/x'), b'this')

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude4(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/z']
        )
        im = matchmod.intersectmatchers(m1, m2)
        # OPT: these next three could probably be False as well.
        self.assertEqual(im.visitdir(b''), True)
        self.assertEqual(im.visitdir(b'dir'), True)
        self.assertEqual(im.visitdir(b'dir/subdir'), True)
        self.assertFalse(im.visitdir(b'dir/foo'))
        self.assertFalse(im.visitdir(b'folder'))
        self.assertFalse(im.visitdir(b'dir/subdir/z'))
        self.assertFalse(im.visitdir(b'dir/subdir/x'))

    def testVisitchildrensetIncludeInclude4(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/z']
        )
        im = matchmod.intersectmatchers(m1, m2)
        # OPT: these next two could probably be set() as well.
        self.assertEqual(im.visitchildrenset(b''), {b'dir'})
        self.assertEqual(im.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(im.visitchildrenset(b'dir/subdir'), set())
        self.assertEqual(im.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(im.visitchildrenset(b'folder'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/z'), set())
        self.assertEqual(im.visitchildrenset(b'dir/subdir/x'), set())


class UnionMatcherTests(unittest.TestCase):
    def testVisitdirM2always(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.alwaysmatcher()
        um = matchmod.unionmatcher([m1, m2])
        # um should be equivalent to a alwaysmatcher.
        self.assertEqual(um.visitdir(b''), b'all')
        self.assertEqual(um.visitdir(b'dir'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitdir(b'dir/foo'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/x'), b'all')
        self.assertEqual(um.visitdir(b'folder'), b'all')

    def testVisitchildrensetM2always(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.alwaysmatcher()
        um = matchmod.unionmatcher([m1, m2])
        # um should be equivalent to a alwaysmatcher.
        self.assertEqual(um.visitchildrenset(b''), b'all')
        self.assertEqual(um.visitchildrenset(b'dir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/foo'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'all')
        self.assertEqual(um.visitchildrenset(b'folder'), b'all')

    def testVisitdirM1never(self):
        m1 = matchmod.nevermatcher()
        m2 = matchmod.alwaysmatcher()
        um = matchmod.unionmatcher([m1, m2])
        # um should be equivalent to a alwaysmatcher.
        self.assertEqual(um.visitdir(b''), b'all')
        self.assertEqual(um.visitdir(b'dir'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitdir(b'dir/foo'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/x'), b'all')
        self.assertEqual(um.visitdir(b'folder'), b'all')

    def testVisitchildrensetM1never(self):
        m1 = matchmod.nevermatcher()
        m2 = matchmod.alwaysmatcher()
        um = matchmod.unionmatcher([m1, m2])
        # um should be equivalent to a alwaysmatcher.
        self.assertEqual(um.visitchildrenset(b''), b'all')
        self.assertEqual(um.visitchildrenset(b'dir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/foo'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'all')
        self.assertEqual(um.visitchildrenset(b'folder'), b'all')

    def testVisitdirM2never(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.nevermatcher()
        um = matchmod.unionmatcher([m1, m2])
        # um should be equivalent to a alwaysmatcher.
        self.assertEqual(um.visitdir(b''), b'all')
        self.assertEqual(um.visitdir(b'dir'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitdir(b'dir/foo'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/x'), b'all')
        self.assertEqual(um.visitdir(b'folder'), b'all')

    def testVisitchildrensetM2never(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.nevermatcher()
        um = matchmod.unionmatcher([m1, m2])
        # um should be equivalent to a alwaysmatcher.
        self.assertEqual(um.visitchildrenset(b''), b'all')
        self.assertEqual(um.visitchildrenset(b'dir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/foo'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'all')
        self.assertEqual(um.visitchildrenset(b'folder'), b'all')

    def testVisitdirM2SubdirPrefix(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', patterns=[b'path:dir/subdir']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitdir(b''), b'all')
        self.assertEqual(um.visitdir(b'dir'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir'), b'all')
        self.assertEqual(um.visitdir(b'dir/foo'), b'all')
        self.assertEqual(um.visitdir(b'folder'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/x'), b'all')

    def testVisitchildrensetM2SubdirPrefix(self):
        m1 = matchmod.alwaysmatcher()
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitchildrenset(b''), b'all')
        self.assertEqual(um.visitchildrenset(b'dir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/foo'), b'all')
        self.assertEqual(um.visitchildrenset(b'folder'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'all')

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitdir(b''), True)
        self.assertEqual(um.visitdir(b'dir'), True)
        self.assertEqual(um.visitdir(b'dir/subdir'), b'all')
        self.assertFalse(um.visitdir(b'dir/foo'))
        self.assertFalse(um.visitdir(b'folder'))
        # OPT: These two should probably be 'all' not True.
        self.assertEqual(um.visitdir(b'dir/subdir/z'), True)
        self.assertEqual(um.visitdir(b'dir/subdir/x'), True)

    def testVisitchildrensetIncludeInclude(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'rootfilesin:dir']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitchildrenset(b''), {b'dir'})
        self.assertEqual(um.visitchildrenset(b'dir'), b'this')
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(um.visitchildrenset(b'folder'), set())
        # OPT: These next two could be 'all' instead of 'this'.
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'this')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'this')

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude2(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:folder']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitdir(b''), True)
        self.assertEqual(um.visitdir(b'dir'), True)
        self.assertEqual(um.visitdir(b'dir/subdir'), b'all')
        self.assertFalse(um.visitdir(b'dir/foo'))
        self.assertEqual(um.visitdir(b'folder'), b'all')
        # OPT: These should probably be 'all' not True.
        self.assertEqual(um.visitdir(b'dir/subdir/z'), True)
        self.assertEqual(um.visitdir(b'dir/subdir/x'), True)

    def testVisitchildrensetIncludeInclude2(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:folder']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitchildrenset(b''), {b'folder', b'dir'})
        self.assertEqual(um.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(um.visitchildrenset(b'folder'), b'all')
        # OPT: These next two could be 'all' instead of 'this'.
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'this')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'this')

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude3(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitdir(b''), True)
        self.assertEqual(um.visitdir(b'dir'), True)
        self.assertEqual(um.visitdir(b'dir/subdir'), b'all')
        self.assertFalse(um.visitdir(b'dir/foo'))
        self.assertFalse(um.visitdir(b'folder'))
        self.assertEqual(um.visitdir(b'dir/subdir/x'), b'all')
        # OPT: this should probably be 'all' not True.
        self.assertEqual(um.visitdir(b'dir/subdir/z'), True)

    def testVisitchildrensetIncludeInclude3(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitchildrenset(b''), {b'dir'})
        self.assertEqual(um.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(um.visitchildrenset(b'folder'), set())
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'all')
        # OPT: this should probably be 'all' not 'this'.
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'this')

    # We're using includematcher instead of patterns because it behaves slightly
    # better (giving narrower results) than patternmatcher.
    def testVisitdirIncludeInclude4(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/z']
        )
        um = matchmod.unionmatcher([m1, m2])
        # OPT: these next three could probably be False as well.
        self.assertEqual(um.visitdir(b''), True)
        self.assertEqual(um.visitdir(b'dir'), True)
        self.assertEqual(um.visitdir(b'dir/subdir'), True)
        self.assertFalse(um.visitdir(b'dir/foo'))
        self.assertFalse(um.visitdir(b'folder'))
        self.assertEqual(um.visitdir(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitdir(b'dir/subdir/x'), b'all')

    def testVisitchildrensetIncludeInclude4(self):
        m1 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/x']
        )
        m2 = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir/z']
        )
        um = matchmod.unionmatcher([m1, m2])
        self.assertEqual(um.visitchildrenset(b''), {b'dir'})
        self.assertEqual(um.visitchildrenset(b'dir'), {b'subdir'})
        self.assertEqual(um.visitchildrenset(b'dir/subdir'), {b'x', b'z'})
        self.assertEqual(um.visitchildrenset(b'dir/foo'), set())
        self.assertEqual(um.visitchildrenset(b'folder'), set())
        self.assertEqual(um.visitchildrenset(b'dir/subdir/z'), b'all')
        self.assertEqual(um.visitchildrenset(b'dir/subdir/x'), b'all')


class SubdirMatcherTests(unittest.TestCase):
    def testVisitdir(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        sm = matchmod.subdirmatcher(b'dir', m)

        self.assertEqual(sm.visitdir(b''), True)
        self.assertEqual(sm.visitdir(b'subdir'), b'all')
        # OPT: These next two should probably be 'all' not True.
        self.assertEqual(sm.visitdir(b'subdir/x'), True)
        self.assertEqual(sm.visitdir(b'subdir/z'), True)
        self.assertFalse(sm.visitdir(b'foo'))

    def testVisitchildrenset(self):
        m = matchmod.match(
            util.localpath(b'/repo'), b'', include=[b'path:dir/subdir']
        )
        sm = matchmod.subdirmatcher(b'dir', m)

        self.assertEqual(sm.visitchildrenset(b''), {b'subdir'})
        self.assertEqual(sm.visitchildrenset(b'subdir'), b'all')
        # OPT: These next two should probably be 'all' not 'this'.
        self.assertEqual(sm.visitchildrenset(b'subdir/x'), b'this')
        self.assertEqual(sm.visitchildrenset(b'subdir/z'), b'this')
        self.assertEqual(sm.visitchildrenset(b'foo'), set())


class PrefixdirMatcherTests(unittest.TestCase):
    def testVisitdir(self):
        m = matchmod.match(
            util.localpath(b'/root/d'),
            b'e/f',
            [b'../a.txt', b'b.txt'],
            auditor=noop_auditor,
        )
        pm = matchmod.prefixdirmatcher(b'd', m)

        # `m` elides 'd' because it's part of the root, and the rest of the
        # patterns are relative.
        self.assertEqual(bool(m(b'a.txt')), False)
        self.assertEqual(bool(m(b'b.txt')), False)
        self.assertEqual(bool(m(b'e/a.txt')), True)
        self.assertEqual(bool(m(b'e/b.txt')), False)
        self.assertEqual(bool(m(b'e/f/b.txt')), True)

        # The prefix matcher re-adds 'd' to the paths, so they need to be
        # specified when using the prefixdirmatcher.
        self.assertEqual(bool(pm(b'a.txt')), False)
        self.assertEqual(bool(pm(b'b.txt')), False)
        self.assertEqual(bool(pm(b'd/e/a.txt')), True)
        self.assertEqual(bool(pm(b'd/e/b.txt')), False)
        self.assertEqual(bool(pm(b'd/e/f/b.txt')), True)

        self.assertEqual(m.visitdir(b''), True)
        self.assertEqual(m.visitdir(b'e'), True)
        self.assertEqual(m.visitdir(b'e/f'), True)
        self.assertEqual(m.visitdir(b'e/f/g'), False)

        self.assertEqual(pm.visitdir(b''), True)
        self.assertEqual(pm.visitdir(b'd'), True)
        self.assertEqual(pm.visitdir(b'd/e'), True)
        self.assertEqual(pm.visitdir(b'd/e/f'), True)
        self.assertEqual(pm.visitdir(b'd/e/f/g'), False)

    def testVisitchildrenset(self):
        m = matchmod.match(
            util.localpath(b'/root/d'),
            b'e/f',
            [b'../a.txt', b'b.txt'],
            auditor=noop_auditor,
        )
        pm = matchmod.prefixdirmatcher(b'd', m)

        # OPT: visitchildrenset could possibly return {'e'} and {'f'} for these
        # next two, respectively; patternmatcher does not have this
        # optimization.
        self.assertEqual(m.visitchildrenset(b''), b'this')
        self.assertEqual(m.visitchildrenset(b'e'), b'this')
        self.assertEqual(m.visitchildrenset(b'e/f'), b'this')
        self.assertEqual(m.visitchildrenset(b'e/f/g'), set())

        # OPT: visitchildrenset could possibly return {'d'}, {'e'}, and {'f'}
        # for these next three, respectively; patternmatcher does not have this
        # optimization.
        self.assertEqual(pm.visitchildrenset(b''), b'this')
        self.assertEqual(pm.visitchildrenset(b'd'), b'this')
        self.assertEqual(pm.visitchildrenset(b'd/e'), b'this')
        self.assertEqual(pm.visitchildrenset(b'd/e/f'), b'this')
        self.assertEqual(pm.visitchildrenset(b'd/e/f/g'), set())


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