Mercurial > hg
annotate tests/test-bdiff.py @ 40417:49c7b701fdc2 stable
phase: add an archived phase
This phase allows for hidden changesets in the "user space". It differs from
the "internal" phase which is intended for internal by-product only. There
have been discussions at the 4.8 sprint to use such phase to speedup cleanup
after history rewriting operation.
Shipping it in the same release as the 'internal-phase' groups the associated
`requires` entry. The important bit is to have support for this phase in the
earliest version of mercurial possible. Adding the UI to manipulate this new
phase later seems fine.
The current plan for archived usage and user interface are as follow. On a
repository with internal-phase on and evolution off:
* history rewriting command set rewritten changeset in the archived phase.
(This mean updating the cleanupnodes method).
* keep `hg unbundle .hg/strip-backup/X.hg` as a way to restore changeset for
now
(backup bundle need to contains phase data)
* [maybe] add a `hg strip --soft` advance flag
(a light way to expose the feature without getting in the way of a better
UI)
Mercurial 4.8 freeze is too close to get the above in by then.
We don't introduce a new repository `requirement` as we reuse the one
introduced with the 'archived' phase during the 4.8 cycle.
author | Boris Feld <boris.feld@octobus.net> |
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date | Wed, 17 Oct 2018 14:47:01 +0200 |
parents | e961f18a0094 |
children | 2372284d9457 |
rev | line source |
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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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6 from mercurial import ( |
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7 mdiff, |
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8 ) |
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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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30 def test_bdiff_basic(self): |
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31 cases = [ |
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32 (b"a\nc\n\n\n\n", b"a\nb\n\n\n"), |
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33 (b"a\nb\nc\n", b"a\nc\n"), |
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34 (b"", b""), |
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35 (b"a\nb\nc", b"a\nb\nc"), |
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36 (b"a\nb\nc\nd\n", b"a\nd\n"), |
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37 (b"a\nb\nc\nd\n", b"a\nc\ne\n"), |
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38 (b"a\nb\nc\n", b"a\nc\n"), |
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39 (b"a\n", b"c\na\nb\n"), |
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40 (b"a\n", b""), |
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41 (b"a\n", b"b\nc\n"), |
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42 (b"a\n", b"c\na\n"), |
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43 (b"", b"adjfkjdjksdhfksj"), |
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44 (b"", b"ab"), |
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45 (b"", b"abc"), |
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46 (b"a", b"a"), |
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47 (b"ab", b"ab"), |
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48 (b"abc", b"abc"), |
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49 (b"a\n", b"a\n"), |
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50 (b"a\nb", b"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 (b"x\n\nx\n\nx\n\nx\n\nz\n", b"x\n\nx\n\ny\n\nx\n\nx\n\nz\n", |
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75 [b'x\n\nx\n\n', |
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76 diffreplace(6, 6, b'', b'y\n\n'), |
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77 b'x\n\nx\n\nz\n']), |
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78 (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", |
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79 [b'x\n\nx\n\n', |
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80 diffreplace(6, 6, b'', b'y\n\n'), |
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81 b'x\n\n', |
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82 diffreplace(9, 9, b'', b'y\n\n'), |
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83 b'x\n\nz\n']), |
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84 ] |
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85 for old, new, want in cases: |
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86 self.assertEqual(self.showdiff(old, new), want) |
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87 |
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88 def test_issue1295_varies_on_pure(self): |
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89 # we should pick up abbbc. rather than bc.de as the longest match |
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90 got = self.showdiff(b"a\nb\nb\nb\nc\n.\nd\ne\n.\nf\n", |
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91 b"a\nb\nb\na\nb\nb\nb\nc\n.\nb\nc\n.\nd\ne\nf\n") |
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92 want_c = [b'a\nb\nb\n', |
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93 diffreplace(6, 6, b'', b'a\nb\nb\nb\nc\n.\n'), |
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94 b'b\nc\n.\nd\ne\n', |
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95 diffreplace(16, 18, b'.\n', b''), |
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96 b'f\n'] |
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97 want_pure = [diffreplace(0, 0, b'', b'a\nb\nb\n'), |
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98 b'a\nb\nb\nb\nc\n.\n', |
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99 diffreplace(12, 12, b'', b'b\nc\n.\n'), |
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100 b'd\ne\n', |
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101 diffreplace(16, 18, b'.\n', b''), b'f\n'] |
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102 self.assertTrue(got in (want_c, want_pure), |
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103 'got: %r, wanted either %r or %r' % ( |
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104 got, want_c, want_pure)) |
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105 |
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106 def test_fixws(self): |
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107 cases = [ |
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108 (b" \ta\r b\t\n", b"ab\n", 1), |
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109 (b" \ta\r b\t\n", b" a b\n", 0), |
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110 (b"", b"", 1), |
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111 (b"", b"", 0), |
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112 ] |
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113 for a, b, allws in cases: |
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114 c = mdiff.fixws(a, allws) |
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115 self.assertEqual( |
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116 c, b, 'fixws(%r) want %r got %r (allws=%r)' % (a, b, c, allws)) |
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117 |
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118 def test_nice_diff_for_trivial_change(self): |
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119 self.assertEqual(self.showdiff( |
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120 b''.join(b'<%d\n-\n' % i for i in range(5)), |
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121 b''.join(b'>%d\n-\n' % i for i in range(5))), |
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122 [diffreplace(0, 3, b'<0\n', b'>0\n'), |
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123 b'-\n', |
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124 diffreplace(5, 8, b'<1\n', b'>1\n'), |
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125 b'-\n', |
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126 diffreplace(10, 13, b'<2\n', b'>2\n'), |
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127 b'-\n', |
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128 diffreplace(15, 18, b'<3\n', b'>3\n'), |
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129 b'-\n', |
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130 diffreplace(20, 23, b'<4\n', b'>4\n'), |
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131 b'-\n']) |
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132 |
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133 def test_prefer_appending(self): |
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134 # 1 line to 3 lines |
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135 self.assertEqual(self.showdiff(b'a\n', b'a\n' * 3), |
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136 [b'a\n', diffreplace(2, 2, b'', b'a\na\n')]) |
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137 # 1 line to 5 lines |
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138 self.assertEqual(self.showdiff(b'a\n', b'a\n' * 5), |
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139 [b'a\n', diffreplace(2, 2, b'', b'a\na\na\na\n')]) |
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140 |
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141 def test_prefer_removing_trailing(self): |
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142 # 3 lines to 1 line |
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143 self.assertEqual(self.showdiff(b'a\n' * 3, b'a\n'), |
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144 [b'a\n', diffreplace(2, 6, b'a\na\n', b'')]) |
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145 # 5 lines to 1 line |
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146 self.assertEqual(self.showdiff(b'a\n' * 5, b'a\n'), |
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147 [b'a\n', diffreplace(2, 10, b'a\na\na\na\n', b'')]) |
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148 |
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149 if __name__ == '__main__': |
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150 import silenttestrunner |
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151 silenttestrunner.main(__name__) |