Mercurial > hg
view tests/test-bdiff.py @ 43112:24a07347aa60
check-commit: allow foo_bar naming in functions
nameswithallthewordssmashedtogetherarehardtoread.
especiallyifenglishisnotyourprimarylanguage.
Let's align with the rest of the programming universe and
allow_the_use_of_underscores_in_names.
We took a hand poll at the 5.2 sprint regarding this change and
all but 1 person supported it. The person who didn't expressed
concerns around excessive API breakage if we mass renamed things.
But we're not planning to mass rename things for the sake of
renaming, so all should be well.
Differential Revision: https://phab.mercurial-scm.org/D2010
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Fri, 02 Feb 2018 10:13:42 -0800 |
parents | 2372284d9457 |
children | 6000f5b25c9b |
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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 = [ (b"a\nc\n\n\n\n", b"a\nb\n\n\n"), (b"a\nb\nc\n", b"a\nc\n"), (b"", b""), (b"a\nb\nc", b"a\nb\nc"), (b"a\nb\nc\nd\n", b"a\nd\n"), (b"a\nb\nc\nd\n", b"a\nc\ne\n"), (b"a\nb\nc\n", b"a\nc\n"), (b"a\n", b"c\na\nb\n"), (b"a\n", b""), (b"a\n", b"b\nc\n"), (b"a\n", b"c\na\n"), (b"", b"adjfkjdjksdhfksj"), (b"", b"ab"), (b"", b"abc"), (b"a", b"a"), (b"ab", b"ab"), (b"abc", b"abc"), (b"a\n", b"a\n"), (b"a\nb", b"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 = [ ( b"x\n\nx\n\nx\n\nx\n\nz\n", b"x\n\nx\n\ny\n\nx\n\nx\n\nz\n", [ b'x\n\nx\n\n', diffreplace(6, 6, b'', b'y\n\n'), b'x\n\nx\n\nz\n', ], ), ( b"x\n\nx\n\nx\n\nx\n\nz\n", b"x\n\nx\n\ny\n\nx\n\ny\n\nx\n\nz\n", [ b'x\n\nx\n\n', diffreplace(6, 6, b'', b'y\n\n'), b'x\n\n', diffreplace(9, 9, b'', b'y\n\n'), b'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( b"a\nb\nb\nb\nc\n.\nd\ne\n.\nf\n", b"a\nb\nb\na\nb\nb\nb\nc\n.\nb\nc\n.\nd\ne\nf\n", ) want_c = [ b'a\nb\nb\n', diffreplace(6, 6, b'', b'a\nb\nb\nb\nc\n.\n'), b'b\nc\n.\nd\ne\n', diffreplace(16, 18, b'.\n', b''), b'f\n', ] want_pure = [ diffreplace(0, 0, b'', b'a\nb\nb\n'), b'a\nb\nb\nb\nc\n.\n', diffreplace(12, 12, b'', b'b\nc\n.\n'), b'd\ne\n', diffreplace(16, 18, b'.\n', b''), b'f\n', ] self.assertTrue( got in (want_c, want_pure), 'got: %r, wanted either %r or %r' % (got, want_c, want_pure), ) def test_fixws(self): cases = [ (b" \ta\r b\t\n", b"ab\n", 1), (b" \ta\r b\t\n", b" a b\n", 0), (b"", b"", 1), (b"", b"", 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( b''.join(b'<%d\n-\n' % i for i in range(5)), b''.join(b'>%d\n-\n' % i for i in range(5)), ), [ diffreplace(0, 3, b'<0\n', b'>0\n'), b'-\n', diffreplace(5, 8, b'<1\n', b'>1\n'), b'-\n', diffreplace(10, 13, b'<2\n', b'>2\n'), b'-\n', diffreplace(15, 18, b'<3\n', b'>3\n'), b'-\n', diffreplace(20, 23, b'<4\n', b'>4\n'), b'-\n', ], ) def test_prefer_appending(self): # 1 line to 3 lines self.assertEqual( self.showdiff(b'a\n', b'a\n' * 3), [b'a\n', diffreplace(2, 2, b'', b'a\na\n')], ) # 1 line to 5 lines self.assertEqual( self.showdiff(b'a\n', b'a\n' * 5), [b'a\n', diffreplace(2, 2, b'', b'a\na\na\na\n')], ) def test_prefer_removing_trailing(self): # 3 lines to 1 line self.assertEqual( self.showdiff(b'a\n' * 3, b'a\n'), [b'a\n', diffreplace(2, 6, b'a\na\n', b'')], ) # 5 lines to 1 line self.assertEqual( self.showdiff(b'a\n' * 5, b'a\n'), [b'a\n', diffreplace(2, 10, b'a\na\na\na\n', b'')], ) if __name__ == '__main__': import silenttestrunner silenttestrunner.main(__name__)