Mercurial > hg
view tests/test-bdiff.py @ 37289:5fadc63ac99f
wireproto: explicit API to create outgoing streams
It is better to create outgoing streams through the reactor so the
reactor knows about what streams are active and can track them
accordingly.
Test output changes slightly because frames from subsequent responses
no longer have the "stream begin" stream flag set because the stream
is now used across all responses.
Differential Revision: https://phab.mercurial-scm.org/D2947
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Mon, 26 Mar 2018 13:59:56 -0700 |
parents | 0c73634d0570 |
children | e05d7c71f209 |
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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 = [ ("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__)