tests/test-match.py
author Manuel Jacob <me@manueljacob.de>
Sun, 22 May 2022 03:50:34 +0200
changeset 49269 395f28064826
parent 48875 6000f5b25c9b
child 50695 1c31b343e514
permissions -rw-r--r--
worker: avoid potential partial write of pickled data Previously, the code wrote the pickled data using os.write(). However, os.write() can write less bytes than passed to it. To trigger the problem, the pickled data had to be larger than 2147479552 bytes on my system. Instead, open a file object and pass it to pickle.dump(). This also has the advantage that it doesn’t buffer the whole pickled data in memory. Note that the opened file must be buffered because pickle doesn’t support unbuffered streams because unbuffered streams’ write() method might write less bytes than passed to it (like os.write()) but pickle.dump() relies on that all bytes are written (see https://github.com/python/cpython/issues/93050). The side effect of using a file object and a with statement is that wfd is explicitly closed now while it seems like before it was implicitly closed by process exit.

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__)