py3: convert the mode argument of os.fdopen to unicodes (1 of 2)
os.fdopen() does not accepts bytes as its second argument which represent the
mode in which the file is to be opened. This patch makes sure unicodes are
passed in py3 by using pycompat.sysstr().
from __future__ import absolute_import, print_function
import collections
import struct
import unittest
import silenttestrunner
from mercurial import (
bdiff,
mpatch,
)
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 = bdiff.bdiff(a, b)
c = a
if d:
c = mpatch.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 = bdiff.bdiff(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 = bdiff.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__':
silenttestrunner.main(__name__)