Mercurial > hg
annotate tests/test-bdiff.py @ 36269:4088e568a411
extensions: reject any unicode strings in tables before loading
This allows us to test hg on Python 3 without disabling third-party
extensions which could pollute cmdtable for example.
author | Yuya Nishihara <yuya@tcha.org> |
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date | Sat, 17 Feb 2018 17:24:29 +0900 |
parents | 0c73634d0570 |
children | e05d7c71f209 |
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1 from __future__ import absolute_import, print_function |
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2 import collections |
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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 mdiff, |
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8 ) |
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9 |
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10 class diffreplace( |
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11 collections.namedtuple('diffreplace', 'start end from_ to')): |
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12 def __repr__(self): |
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13 return 'diffreplace(%r, %r, %r, %r)' % self |
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14 |
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15 class BdiffTests(unittest.TestCase): |
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16 |
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17 def assert_bdiff_applies(self, a, b): |
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18 d = mdiff.textdiff(a, b) |
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19 c = a |
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20 if d: |
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21 c = mdiff.patches(a, [d]) |
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22 self.assertEqual( |
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23 c, b, ("bad diff+patch result from\n %r to\n " |
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24 "%r: \nbdiff: %r\npatched: %r" % (a, b, d, c[:200]))) |
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25 |
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26 def assert_bdiff(self, a, b): |
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27 self.assert_bdiff_applies(a, b) |
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28 self.assert_bdiff_applies(b, a) |
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29 |
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30 def test_bdiff_basic(self): |
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31 cases = [ |
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32 ("a\nc\n\n\n\n", "a\nb\n\n\n"), |
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33 ("a\nb\nc\n", "a\nc\n"), |
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34 ("", ""), |
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35 ("a\nb\nc", "a\nb\nc"), |
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36 ("a\nb\nc\nd\n", "a\nd\n"), |
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37 ("a\nb\nc\nd\n", "a\nc\ne\n"), |
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38 ("a\nb\nc\n", "a\nc\n"), |
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39 ("a\n", "c\na\nb\n"), |
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40 ("a\n", ""), |
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41 ("a\n", "b\nc\n"), |
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42 ("a\n", "c\na\n"), |
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43 ("", "adjfkjdjksdhfksj"), |
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44 ("", "ab"), |
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45 ("", "abc"), |
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46 ("a", "a"), |
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47 ("ab", "ab"), |
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48 ("abc", "abc"), |
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49 ("a\n", "a\n"), |
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50 ("a\nb", "a\nb"), |
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51 ] |
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52 for a, b in cases: |
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53 self.assert_bdiff(a, b) |
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54 |
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55 def showdiff(self, a, b): |
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56 bin = mdiff.textdiff(a, b) |
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57 pos = 0 |
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58 q = 0 |
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59 actions = [] |
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60 while pos < len(bin): |
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61 p1, p2, l = struct.unpack(">lll", bin[pos:pos + 12]) |
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62 pos += 12 |
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63 if p1: |
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64 actions.append(a[q:p1]) |
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65 actions.append(diffreplace(p1, p2, a[p1:p2], bin[pos:pos + l])) |
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66 pos += l |
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67 q = p2 |
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68 if q < len(a): |
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69 actions.append(a[q:]) |
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70 return actions |
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71 |
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72 def test_issue1295(self): |
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73 cases = [ |
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74 ("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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75 ['x\n\nx\n\n', diffreplace(6, 6, '', 'y\n\n'), 'x\n\nx\n\nz\n']), |
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76 ("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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77 ['x\n\nx\n\n', |
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78 diffreplace(6, 6, '', 'y\n\n'), |
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79 'x\n\n', |
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80 diffreplace(9, 9, '', 'y\n\n'), |
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81 'x\n\nz\n']), |
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82 ] |
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83 for old, new, want in cases: |
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84 self.assertEqual(self.showdiff(old, new), want) |
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85 |
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86 def test_issue1295_varies_on_pure(self): |
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87 # we should pick up abbbc. rather than bc.de as the longest match |
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88 got = self.showdiff("a\nb\nb\nb\nc\n.\nd\ne\n.\nf\n", |
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89 "a\nb\nb\na\nb\nb\nb\nc\n.\nb\nc\n.\nd\ne\nf\n") |
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90 want_c = ['a\nb\nb\n', |
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91 diffreplace(6, 6, '', 'a\nb\nb\nb\nc\n.\n'), |
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92 'b\nc\n.\nd\ne\n', |
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93 diffreplace(16, 18, '.\n', ''), |
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94 'f\n'] |
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95 want_pure = [diffreplace(0, 0, '', 'a\nb\nb\n'), |
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96 'a\nb\nb\nb\nc\n.\n', |
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97 diffreplace(12, 12, '', 'b\nc\n.\n'), |
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98 'd\ne\n', |
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99 diffreplace(16, 18, '.\n', ''), 'f\n'] |
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100 self.assert_(got in (want_c, want_pure), |
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101 'got: %r, wanted either %r or %r' % ( |
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102 got, want_c, want_pure)) |
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103 |
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104 def test_fixws(self): |
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105 cases = [ |
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106 (" \ta\r b\t\n", "ab\n", 1), |
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107 (" \ta\r b\t\n", " a b\n", 0), |
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108 ("", "", 1), |
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109 ("", "", 0), |
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110 ] |
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111 for a, b, allws in cases: |
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112 c = mdiff.fixws(a, allws) |
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113 self.assertEqual( |
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114 c, b, 'fixws(%r) want %r got %r (allws=%r)' % (a, b, c, allws)) |
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115 |
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116 def test_nice_diff_for_trivial_change(self): |
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117 self.assertEqual(self.showdiff( |
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118 ''.join('<%s\n-\n' % i for i in range(5)), |
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119 ''.join('>%s\n-\n' % i for i in range(5))), |
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120 [diffreplace(0, 3, '<0\n', '>0\n'), |
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121 '-\n', |
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122 diffreplace(5, 8, '<1\n', '>1\n'), |
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123 '-\n', |
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124 diffreplace(10, 13, '<2\n', '>2\n'), |
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125 '-\n', |
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126 diffreplace(15, 18, '<3\n', '>3\n'), |
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127 '-\n', |
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128 diffreplace(20, 23, '<4\n', '>4\n'), |
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129 '-\n']) |
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130 |
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131 def test_prefer_appending(self): |
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132 # 1 line to 3 lines |
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133 self.assertEqual(self.showdiff('a\n', 'a\n' * 3), |
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134 ['a\n', diffreplace(2, 2, '', 'a\na\n')]) |
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135 # 1 line to 5 lines |
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136 self.assertEqual(self.showdiff('a\n', 'a\n' * 5), |
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137 ['a\n', diffreplace(2, 2, '', 'a\na\na\na\n')]) |
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138 |
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139 def test_prefer_removing_trailing(self): |
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140 # 3 lines to 1 line |
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141 self.assertEqual(self.showdiff('a\n' * 3, 'a\n'), |
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142 ['a\n', diffreplace(2, 6, 'a\na\n', '')]) |
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143 # 5 lines to 1 line |
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144 self.assertEqual(self.showdiff('a\n' * 5, 'a\n'), |
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145 ['a\n', diffreplace(2, 10, 'a\na\na\na\n', '')]) |
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146 |
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147 if __name__ == '__main__': |
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148 import silenttestrunner |
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149 silenttestrunner.main(__name__) |