Mercurial > hg
annotate tests/test-bdiff.py @ 31322:4282feb79432
hg-mod: directly use repo.vfs.join
The 'repo.join' method is about to be deprecated.
author | Pierre-Yves David <pierre-yves.david@ens-lyon.org> |
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date | Wed, 08 Mar 2017 16:53:24 -0800 |
parents | f2ad0d804700 |
children | ded48ad55146 |
rev | line source |
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1 from __future__ import absolute_import, print_function |
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2 import collections |
8656 | 3 import struct |
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4 import unittest |
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5 |
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6 from mercurial import ( |
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7 bdiff, |
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8 mpatch, |
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9 ) |
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10 |
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11 class diffreplace( |
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12 collections.namedtuple('diffreplace', 'start end from_ to')): |
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13 def __repr__(self): |
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14 return 'diffreplace(%r, %r, %r, %r)' % self |
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15 |
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16 class BdiffTests(unittest.TestCase): |
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17 |
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18 def assert_bdiff_applies(self, a, b): |
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19 d = bdiff.bdiff(a, b) |
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20 c = a |
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21 if d: |
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22 c = mpatch.patches(a, [d]) |
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23 self.assertEqual( |
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24 c, b, ("bad diff+patch result from\n %r to\n " |
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25 "%r: \nbdiff: %r\npatched: %r" % (a, b, d, c[:200]))) |
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26 |
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27 def assert_bdiff(self, a, b): |
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28 self.assert_bdiff_applies(a, b) |
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29 self.assert_bdiff_applies(b, a) |
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30 |
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31 def test_bdiff_basic(self): |
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32 cases = [ |
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33 ("a\nc\n\n\n\n", "a\nb\n\n\n"), |
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34 ("a\nb\nc\n", "a\nc\n"), |
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35 ("", ""), |
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36 ("a\nb\nc", "a\nb\nc"), |
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37 ("a\nb\nc\nd\n", "a\nd\n"), |
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38 ("a\nb\nc\nd\n", "a\nc\ne\n"), |
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39 ("a\nb\nc\n", "a\nc\n"), |
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40 ("a\n", "c\na\nb\n"), |
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41 ("a\n", ""), |
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42 ("a\n", "b\nc\n"), |
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43 ("a\n", "c\na\n"), |
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44 ("", "adjfkjdjksdhfksj"), |
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45 ("", "ab"), |
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46 ("", "abc"), |
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47 ("a", "a"), |
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48 ("ab", "ab"), |
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49 ("abc", "abc"), |
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50 ("a\n", "a\n"), |
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51 ("a\nb", "a\nb"), |
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52 ] |
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53 for a, b in cases: |
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54 self.assert_bdiff(a, b) |
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55 |
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56 def showdiff(self, a, b): |
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57 bin = bdiff.bdiff(a, b) |
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58 pos = 0 |
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59 q = 0 |
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60 actions = [] |
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61 while pos < len(bin): |
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62 p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12]) |
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63 pos += 12 |
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64 if p1: |
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65 actions.append(a[q:p1]) |
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66 actions.append(diffreplace(p1, p2, a[p1:p2], bin[pos:pos + l])) |
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67 pos += l |
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68 q = p2 |
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69 if q < len(a): |
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70 actions.append(a[q:]) |
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71 return actions |
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72 |
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73 def test_issue1295(self): |
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74 cases = [ |
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75 ("x\n\nx\n\nx\n\nx\n\nz\n", "x\n\nx\n\ny\n\nx\n\nx\n\nz\n", |
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76 ['x\n\nx\n\n', diffreplace(6, 6, '', 'y\n\n'), 'x\n\nx\n\nz\n']), |
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77 ("x\n\nx\n\nx\n\nx\n\nz\n", "x\n\nx\n\ny\n\nx\n\ny\n\nx\n\nz\n", |
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78 ['x\n\nx\n\n', |
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79 diffreplace(6, 6, '', 'y\n\n'), |
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80 'x\n\n', |
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81 diffreplace(9, 9, '', 'y\n\n'), |
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82 'x\n\nz\n']), |
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83 ] |
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84 for old, new, want in cases: |
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85 self.assertEqual(self.showdiff(old, new), want) |
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86 |
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87 def test_issue1295_varies_on_pure(self): |
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88 # we should pick up abbbc. rather than bc.de as the longest match |
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89 got = self.showdiff("a\nb\nb\nb\nc\n.\nd\ne\n.\nf\n", |
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90 "a\nb\nb\na\nb\nb\nb\nc\n.\nb\nc\n.\nd\ne\nf\n") |
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91 want_c = ['a\nb\nb\n', |
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92 diffreplace(6, 6, '', 'a\nb\nb\nb\nc\n.\n'), |
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93 'b\nc\n.\nd\ne\n', |
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94 diffreplace(16, 18, '.\n', ''), |
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95 'f\n'] |
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96 want_pure = [diffreplace(0, 0, '', 'a\nb\nb\n'), |
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97 'a\nb\nb\nb\nc\n.\n', |
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98 diffreplace(12, 12, '', 'b\nc\n.\n'), |
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99 'd\ne\n', |
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100 diffreplace(16, 18, '.\n', ''), 'f\n'] |
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101 self.assert_(got in (want_c, want_pure), |
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102 'got: %r, wanted either %r or %r' % ( |
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103 got, want_c, want_pure)) |
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104 |
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105 def test_fixws(self): |
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106 cases = [ |
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107 (" \ta\r b\t\n", "ab\n", 1), |
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108 (" \ta\r b\t\n", " a b\n", 0), |
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109 ("", "", 1), |
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110 ("", "", 0), |
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111 ] |
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112 for a, b, allws in cases: |
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113 c = bdiff.fixws(a, allws) |
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114 self.assertEqual( |
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115 c, b, 'fixws(%r) want %r got %r (allws=%r)' % (a, b, c, allws)) |
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116 |
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117 def test_nice_diff_for_trivial_change(self): |
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118 self.assertEqual(self.showdiff( |
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119 ''.join('<%s\n-\n' % i for i in range(5)), |
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120 ''.join('>%s\n-\n' % i for i in range(5))), |
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121 [diffreplace(0, 3, '<0\n', '>0\n'), |
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122 '-\n', |
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123 diffreplace(5, 8, '<1\n', '>1\n'), |
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124 '-\n', |
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125 diffreplace(10, 13, '<2\n', '>2\n'), |
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126 '-\n', |
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127 diffreplace(15, 18, '<3\n', '>3\n'), |
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128 '-\n', |
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129 diffreplace(20, 23, '<4\n', '>4\n'), |
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130 '-\n']) |
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131 |
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132 def test_prefer_appending(self): |
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133 # 1 line to 3 lines |
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134 self.assertEqual(self.showdiff('a\n', 'a\n' * 3), |
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135 ['a\n', diffreplace(2, 2, '', 'a\na\n')]) |
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136 # 1 line to 5 lines |
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137 self.assertEqual(self.showdiff('a\n', 'a\n' * 5), |
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138 ['a\n', diffreplace(2, 2, '', 'a\na\na\na\n')]) |
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139 |
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140 def test_prefer_removing_trailing(self): |
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141 # 3 lines to 1 line |
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142 self.assertEqual(self.showdiff('a\n' * 3, 'a\n'), |
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143 ['a\n', diffreplace(2, 6, 'a\na\n', '')]) |
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144 # 5 lines to 1 line |
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145 self.assertEqual(self.showdiff('a\n' * 5, 'a\n'), |
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146 ['a\n', diffreplace(2, 10, 'a\na\na\na\n', '')]) |
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147 |
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148 if __name__ == '__main__': |
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149 import silenttestrunner |
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150 silenttestrunner.main(__name__) |