Mercurial > cpython-lru_cache-weakref

annotate Lib/test/test_difflib.py @ 68256:b36cb4602e21 2.7

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Dummy-merge 2.6 branch into 2.7 branch.
author Georg Brandl <georg@python.org>
date Sat, 05 Mar 2011 15:15:07 +0100
parents 1a65290e6d03 818cd40df865
children 09459397f807
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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aa0d2d51fbde Get rid of relative imports in all unittests. Now anything that
Barry Warsaw <barry@python.org>
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1 import difflib
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2 from test.test_support import run_unittest, findfile
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3 import unittest
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Raymond Hettinger <python@rcn.com>
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4 import doctest
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Gustavo Niemeyer <gustavo@niemeyer.net>
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5 import sys
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6
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7
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8 class TestWithAscii(unittest.TestCase):
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9 def test_one_insert(self):
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10 sm = difflib.SequenceMatcher(None, 'b' * 100, 'a' + 'b' * 100)
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11 self.assertAlmostEqual(sm.ratio(), 0.995, places=3)
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12 self.assertEqual(list(sm.get_opcodes()),
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13 [ ('insert', 0, 0, 0, 1),
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14 ('equal', 0, 100, 1, 101)])
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15 sm = difflib.SequenceMatcher(None, 'b' * 100, 'b' * 50 + 'a' + 'b' * 50)
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16 self.assertAlmostEqual(sm.ratio(), 0.995, places=3)
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17 self.assertEqual(list(sm.get_opcodes()),
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18 [ ('equal', 0, 50, 0, 50),
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19 ('insert', 50, 50, 50, 51),
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20 ('equal', 50, 100, 51, 101)])
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21
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22 def test_one_delete(self):
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23 sm = difflib.SequenceMatcher(None, 'a' * 40 + 'c' + 'b' * 40, 'a' * 40 + 'b' * 40)
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24 self.assertAlmostEqual(sm.ratio(), 0.994, places=3)
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25 self.assertEqual(list(sm.get_opcodes()),
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26 [ ('equal', 0, 40, 0, 40),
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27 ('delete', 40, 41, 40, 40),
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28 ('equal', 41, 81, 40, 80)])
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29
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30
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31 class TestAutojunk(unittest.TestCase):
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32 """Tests for the autojunk parameter added in 2.7"""
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33 def test_one_insert_homogenous_sequence(self):
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34 # By default autojunk=True and the heuristic kicks in for a sequence
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35 # of length 200+
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36 seq1 = 'b' * 200
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37 seq2 = 'a' + 'b' * 200
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38
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39 sm = difflib.SequenceMatcher(None, seq1, seq2)
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40 self.assertAlmostEqual(sm.ratio(), 0, places=3)
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41
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42 # Now turn the heuristic off
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43 sm = difflib.SequenceMatcher(None, seq1, seq2, autojunk=False)
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44 self.assertAlmostEqual(sm.ratio(), 0.9975, places=3)
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45
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46
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47 class TestSFbugs(unittest.TestCase):
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48 def test_ratio_for_null_seqn(self):
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49 # Check clearing of SF bug 763023
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50 s = difflib.SequenceMatcher(None, [], [])
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51 self.assertEqual(s.ratio(), 1)
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52 self.assertEqual(s.quick_ratio(), 1)
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53 self.assertEqual(s.real_quick_ratio(), 1)
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54
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55 def test_comparing_empty_lists(self):
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56 # Check fix for bug #979794
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57 group_gen = difflib.SequenceMatcher(None, [], []).get_grouped_opcodes()
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58 self.assertRaises(StopIteration, group_gen.next)
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59 diff_gen = difflib.unified_diff([], [])
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60 self.assertRaises(StopIteration, diff_gen.next)
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61
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62 def test_added_tab_hint(self):
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63 # Check fix for bug #1488943
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64 diff = list(difflib.Differ().compare(["\tI am a buggy"],["\t\tI am a bug"]))
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65 self.assertEqual("- \tI am a buggy", diff[0])
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66 self.assertEqual("? --\n", diff[1])
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67 self.assertEqual("+ \t\tI am a bug", diff[2])
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68 self.assertEqual("? +\n", diff[3])
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69
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parents: 32612
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70 patch914575_from1 = """
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71 1. Beautiful is beTTer than ugly.
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72 2. Explicit is better than implicit.
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73 3. Simple is better than complex.
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74 4. Complex is better than complicated.
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75 """
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76
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77 patch914575_to1 = """
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Martin v. Löwis <martin@v.loewis.de>
parents: 32612
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78 1. Beautiful is better than ugly.
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79 3. Simple is better than complex.
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80 4. Complicated is better than complex.
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81 5. Flat is better than nested.
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82 """
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83
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84 patch914575_from2 = """
6d3bdd19beeb Patch #914575: difflib side by side diff support, diff.py s/b/s HTML option.
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85 \t\tLine 1: preceeded by from:[tt] to:[ssss]
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86 \t\tLine 2: preceeded by from:[sstt] to:[sssst]
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87 \t \tLine 3: preceeded by from:[sstst] to:[ssssss]
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88 Line 4: \thas from:[sst] to:[sss] after :
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89 Line 5: has from:[t] to:[ss] at end\t
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90 """
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91
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92 patch914575_to2 = """
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93 Line 1: preceeded by from:[tt] to:[ssss]
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94 \tLine 2: preceeded by from:[sstt] to:[sssst]
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95 Line 3: preceeded by from:[sstst] to:[ssssss]
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96 Line 4: has from:[sst] to:[sss] after :
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97 Line 5: has from:[t] to:[ss] at end
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98 """
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99
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100 patch914575_from3 = """line 0
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101 1234567890123456789012345689012345
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102 line 1
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103 line 2
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104 line 3
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105 line 4 changed
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106 line 5 changed
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107 line 6 changed
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108 line 7
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109 line 8 subtracted
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110 line 9
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111 1234567890123456789012345689012345
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112 short line
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113 just fits in!!
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114 just fits in two lines yup!!
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115 the end"""
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116
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117 patch914575_to3 = """line 0
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118 1234567890123456789012345689012345
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119 line 1
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120 line 2 added
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121 line 3
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122 line 4 chanGEd
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123 line 5a chanGed
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124 line 6a changEd
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125 line 7
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126 line 8
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127 line 9
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128 1234567890
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129 another long line that needs to be wrapped
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130 just fitS in!!
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131 just fits in two lineS yup!!
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132 the end"""
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133
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134 class TestSFpatches(unittest.TestCase):
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135
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136 def test_html_diff(self):
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137 # Check SF patch 914575 for generating HTML differences
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138 f1a = ((patch914575_from1 + '123\n'*10)*3)
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139 t1a = (patch914575_to1 + '123\n'*10)*3
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140 f1b = '456\n'*10 + f1a
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141 t1b = '456\n'*10 + t1a
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142 f1a = f1a.splitlines()
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143 t1a = t1a.splitlines()
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144 f1b = f1b.splitlines()
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145 t1b = t1b.splitlines()
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146 f2 = patch914575_from2.splitlines()
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147 t2 = patch914575_to2.splitlines()
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148 f3 = patch914575_from3
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149 t3 = patch914575_to3
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150 i = difflib.HtmlDiff()
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151 j = difflib.HtmlDiff(tabsize=2)
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152 k = difflib.HtmlDiff(wrapcolumn=14)
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153
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154 full = i.make_file(f1a,t1a,'from','to',context=False,numlines=5)
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155 tables = '\n'.join(
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156 [
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157 '<h2>Context (first diff within numlines=5(default))</h2>',
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158 i.make_table(f1a,t1a,'from','to',context=True),
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159 '<h2>Context (first diff after numlines=5(default))</h2>',
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160 i.make_table(f1b,t1b,'from','to',context=True),
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161 '<h2>Context (numlines=6)</h2>',
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162 i.make_table(f1a,t1a,'from','to',context=True,numlines=6),
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163 '<h2>Context (numlines=0)</h2>',
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164 i.make_table(f1a,t1a,'from','to',context=True,numlines=0),
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165 '<h2>Same Context</h2>',
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166 i.make_table(f1a,f1a,'from','to',context=True),
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167 '<h2>Same Full</h2>',
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168 i.make_table(f1a,f1a,'from','to',context=False),
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169 '<h2>Empty Context</h2>',
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170 i.make_table([],[],'from','to',context=True),
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171 '<h2>Empty Full</h2>',
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172 i.make_table([],[],'from','to',context=False),
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173 '<h2>tabsize=2</h2>',
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174 j.make_table(f2,t2),
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175 '<h2>tabsize=default</h2>',
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176 i.make_table(f2,t2),
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177 '<h2>Context (wrapcolumn=14,numlines=0)</h2>',
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178 k.make_table(f3.splitlines(),t3.splitlines(),context=True,numlines=0),
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179 '<h2>wrapcolumn=14,splitlines()</h2>',
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180 k.make_table(f3.splitlines(),t3.splitlines()),
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181 '<h2>wrapcolumn=14,splitlines(True)</h2>',
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182 k.make_table(f3.splitlines(True),t3.splitlines(True)),
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183 ])
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184 actual = full.replace('</body>','\n%s\n</body>' % tables)
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185
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186 # temporarily uncomment next two lines to baseline this test
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187 #with open('test_difflib_expect.html','w') as fp:
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188 # fp.write(actual)
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189
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190 with open(findfile('test_difflib_expect.html')) as fp:
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191 self.assertEqual(actual, fp.read())
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192
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193 def test_recursion_limit(self):
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194 # Check if the problem described in patch #1413711 exists.
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195 limit = sys.getrecursionlimit()
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196 old = [(i%2 and "K:%d" or "V:A:%d") % i for i in range(limit*2)]
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197 new = [(i%2 and "K:%d" or "V:B:%d") % i for i in range(limit*2)]
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198 difflib.SequenceMatcher(None, old, new).get_opcodes()
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199
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200
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201 class TestOutputFormat(unittest.TestCase):
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202 def test_tab_delimiter(self):
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203 args = ['one', 'two', 'Original', 'Current',
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204 '2005-01-26 23:30:50', '2010-04-02 10:20:52']
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205 ud = difflib.unified_diff(*args, lineterm='')
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206 self.assertEqual(list(ud)[0:2], [
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207 "--- Original\t2005-01-26 23:30:50",
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208 "+++ Current\t2010-04-02 10:20:52"])
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209 cd = difflib.context_diff(*args, lineterm='')
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210 self.assertEqual(list(cd)[0:2], [
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211 "*** Original\t2005-01-26 23:30:50",
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212 "--- Current\t2010-04-02 10:20:52"])
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213
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214 def test_no_trailing_tab_on_empty_filedate(self):
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215 args = ['one', 'two', 'Original', 'Current']
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R. David Murray <rdmurray@bitdance.com>
parents: 57411
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216 ud = difflib.unified_diff(*args, lineterm='')
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R. David Murray <rdmurray@bitdance.com>
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217 self.assertEqual(list(ud)[0:2], ["--- Original", "+++ Current"])
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R. David Murray <rdmurray@bitdance.com>
parents: 57411
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218
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R. David Murray <rdmurray@bitdance.com>
parents: 57411
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219 cd = difflib.context_diff(*args, lineterm='')
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R. David Murray <rdmurray@bitdance.com>
parents: 57411
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220 self.assertEqual(list(cd)[0:2], ["*** Original", "--- Current"])
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221
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222
37550
0342c5f0f4ff Fix tests so they pass in -R mode
Neal Norwitz <nnorwitz@gmail.com>
parents: 36429
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223 def test_main():
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224 difflib.HtmlDiff._default_prefix = 0
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Neal Norwitz <nnorwitz@gmail.com>
parents: 36429
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225 Doctests = doctest.DocTestSuite(difflib)
66156
1a65290e6d03 #2986 Add autojunk parameter to SequenceMatcher to optionally disable 'popular == junk' heuristic.
Terry Reedy <tjreedy@udel.edu>
parents: 60552
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226 run_unittest(
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Terry Reedy <tjreedy@udel.edu>
parents: 60552
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227 TestWithAscii, TestAutojunk, TestSFpatches, TestSFbugs,
1a65290e6d03 #2986 Add autojunk parameter to SequenceMatcher to optionally disable 'popular == junk' heuristic.
Terry Reedy <tjreedy@udel.edu>
parents: 60552
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228 TestOutputFormat, Doctests)
29892
79ec7e302d53 Exercise Jim Fulton's new doctest extension for running doctests in a
Raymond Hettinger <python@rcn.com>
parents: 29719
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229
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Neal Norwitz <nnorwitz@gmail.com>
parents: 36429
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230 if __name__ == '__main__':
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parents: 36429
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231 test_main()