manifest: set appropriate cache entry when clearing _dirlogcache()
manifestrevlog applies to any manifest, not just the root manifest.
Resetting the cache and populating its root entry with self is not
correct when the instance does not refer to the root manifest.
This has no test fallout. So I'm guessing we only ever call
clearcaches() on the root manifest. Or we have no test coverage that
are impacted by a bad cache on a non-root manifestrevlog.
Differential Revision: https://phab.mercurial-scm.org/D4275
from __future__ import absolute_import, print_function
import collections
import struct
import unittest
from mercurial import (
mdiff,
)
class diffreplace(
collections.namedtuple('diffreplace', 'start end from_ to')):
def __repr__(self):
return 'diffreplace(%r, %r, %r, %r)' % self
class BdiffTests(unittest.TestCase):
def assert_bdiff_applies(self, a, b):
d = mdiff.textdiff(a, b)
c = a
if d:
c = mdiff.patches(a, [d])
self.assertEqual(
c, b, ("bad diff+patch result from\n %r to\n "
"%r: \nbdiff: %r\npatched: %r" % (a, b, d, c[:200])))
def assert_bdiff(self, a, b):
self.assert_bdiff_applies(a, b)
self.assert_bdiff_applies(b, a)
def test_bdiff_basic(self):
cases = [
("a\nc\n\n\n\n", "a\nb\n\n\n"),
("a\nb\nc\n", "a\nc\n"),
("", ""),
("a\nb\nc", "a\nb\nc"),
("a\nb\nc\nd\n", "a\nd\n"),
("a\nb\nc\nd\n", "a\nc\ne\n"),
("a\nb\nc\n", "a\nc\n"),
("a\n", "c\na\nb\n"),
("a\n", ""),
("a\n", "b\nc\n"),
("a\n", "c\na\n"),
("", "adjfkjdjksdhfksj"),
("", "ab"),
("", "abc"),
("a", "a"),
("ab", "ab"),
("abc", "abc"),
("a\n", "a\n"),
("a\nb", "a\nb"),
]
for a, b in cases:
self.assert_bdiff(a, b)
def showdiff(self, a, b):
bin = mdiff.textdiff(a, b)
pos = 0
q = 0
actions = []
while pos < len(bin):
p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12])
pos += 12
if p1:
actions.append(a[q:p1])
actions.append(diffreplace(p1, p2, a[p1:p2], bin[pos:pos + l]))
pos += l
q = p2
if q < len(a):
actions.append(a[q:])
return actions
def test_issue1295(self):
cases = [
("x\n\nx\n\nx\n\nx\n\nz\n", "x\n\nx\n\ny\n\nx\n\nx\n\nz\n",
['x\n\nx\n\n', diffreplace(6, 6, '', 'y\n\n'), 'x\n\nx\n\nz\n']),
("x\n\nx\n\nx\n\nx\n\nz\n", "x\n\nx\n\ny\n\nx\n\ny\n\nx\n\nz\n",
['x\n\nx\n\n',
diffreplace(6, 6, '', 'y\n\n'),
'x\n\n',
diffreplace(9, 9, '', 'y\n\n'),
'x\n\nz\n']),
]
for old, new, want in cases:
self.assertEqual(self.showdiff(old, new), want)
def test_issue1295_varies_on_pure(self):
# we should pick up abbbc. rather than bc.de as the longest match
got = self.showdiff("a\nb\nb\nb\nc\n.\nd\ne\n.\nf\n",
"a\nb\nb\na\nb\nb\nb\nc\n.\nb\nc\n.\nd\ne\nf\n")
want_c = ['a\nb\nb\n',
diffreplace(6, 6, '', 'a\nb\nb\nb\nc\n.\n'),
'b\nc\n.\nd\ne\n',
diffreplace(16, 18, '.\n', ''),
'f\n']
want_pure = [diffreplace(0, 0, '', 'a\nb\nb\n'),
'a\nb\nb\nb\nc\n.\n',
diffreplace(12, 12, '', 'b\nc\n.\n'),
'd\ne\n',
diffreplace(16, 18, '.\n', ''), 'f\n']
self.assert_(got in (want_c, want_pure),
'got: %r, wanted either %r or %r' % (
got, want_c, want_pure))
def test_fixws(self):
cases = [
(" \ta\r b\t\n", "ab\n", 1),
(" \ta\r b\t\n", " a b\n", 0),
("", "", 1),
("", "", 0),
]
for a, b, allws in cases:
c = mdiff.fixws(a, allws)
self.assertEqual(
c, b, 'fixws(%r) want %r got %r (allws=%r)' % (a, b, c, allws))
def test_nice_diff_for_trivial_change(self):
self.assertEqual(self.showdiff(
''.join('<%s\n-\n' % i for i in range(5)),
''.join('>%s\n-\n' % i for i in range(5))),
[diffreplace(0, 3, '<0\n', '>0\n'),
'-\n',
diffreplace(5, 8, '<1\n', '>1\n'),
'-\n',
diffreplace(10, 13, '<2\n', '>2\n'),
'-\n',
diffreplace(15, 18, '<3\n', '>3\n'),
'-\n',
diffreplace(20, 23, '<4\n', '>4\n'),
'-\n'])
def test_prefer_appending(self):
# 1 line to 3 lines
self.assertEqual(self.showdiff('a\n', 'a\n' * 3),
['a\n', diffreplace(2, 2, '', 'a\na\n')])
# 1 line to 5 lines
self.assertEqual(self.showdiff('a\n', 'a\n' * 5),
['a\n', diffreplace(2, 2, '', 'a\na\na\na\n')])
def test_prefer_removing_trailing(self):
# 3 lines to 1 line
self.assertEqual(self.showdiff('a\n' * 3, 'a\n'),
['a\n', diffreplace(2, 6, 'a\na\n', '')])
# 5 lines to 1 line
self.assertEqual(self.showdiff('a\n' * 5, 'a\n'),
['a\n', diffreplace(2, 10, 'a\na\na\na\n', '')])
if __name__ == '__main__':
import silenttestrunner
silenttestrunner.main(__name__)