1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
import difflib
from test.test_support import run_unittest, findfile
import unittest
import doctest
import sys
class TestSFbugs(unittest.TestCase):
def test_ratio_for_null_seqn(self):
# Check clearing of SF bug 763023
s = difflib.SequenceMatcher(None, [], [])
self.assertEqual(s.ratio(), 1)
self.assertEqual(s.quick_ratio(), 1)
self.assertEqual(s.real_quick_ratio(), 1)
def test_comparing_empty_lists(self):
# Check fix for bug #979794
group_gen = difflib.SequenceMatcher(None, [], []).get_grouped_opcodes()
self.assertRaises(StopIteration, group_gen.next)
diff_gen = difflib.unified_diff([], [])
self.assertRaises(StopIteration, diff_gen.next)
def test_added_tab_hint(self):
# Check fix for bug #1488943
diff = list(difflib.Differ().compare(["\tI am a buggy"],["\t\tI am a bug"]))
self.assertEqual("- \tI am a buggy", diff[0])
self.assertEqual("? --\n", diff[1])
self.assertEqual("+ \t\tI am a bug", diff[2])
self.assertEqual("? +\n", diff[3])
patch914575_from1 = """
1. Beautiful is beTTer than ugly.
2. Explicit is better than implicit.
3. Simple is better than complex.
4. Complex is better than complicated.
"""
patch914575_to1 = """
1. Beautiful is better than ugly.
3. Simple is better than complex.
4. Complicated is better than complex.
5. Flat is better than nested.
"""
patch914575_from2 = """
\t\tLine 1: preceeded by from:[tt] to:[ssss]
\t\tLine 2: preceeded by from:[sstt] to:[sssst]
\t \tLine 3: preceeded by from:[sstst] to:[ssssss]
Line 4: \thas from:[sst] to:[sss] after :
Line 5: has from:[t] to:[ss] at end\t
"""
patch914575_to2 = """
Line 1: preceeded by from:[tt] to:[ssss]
\tLine 2: preceeded by from:[sstt] to:[sssst]
Line 3: preceeded by from:[sstst] to:[ssssss]
Line 4: has from:[sst] to:[sss] after :
Line 5: has from:[t] to:[ss] at end
"""
patch914575_from3 = """line 0
1234567890123456789012345689012345
line 1
line 2
line 3
line 4 changed
line 5 changed
line 6 changed
line 7
line 8 subtracted
line 9
1234567890123456789012345689012345
short line
just fits in!!
just fits in two lines yup!!
the end"""
patch914575_to3 = """line 0
1234567890123456789012345689012345
line 1
line 2 added
line 3
line 4 chanGEd
line 5a chanGed
line 6a changEd
line 7
line 8
line 9
1234567890
another long line that needs to be wrapped
just fitS in!!
just fits in two lineS yup!!
the end"""
class TestSFpatches(unittest.TestCase):
def test_html_diff(self):
# Check SF patch 914575 for generating HTML differences
f1a = ((patch914575_from1 + '123\n'*10)*3)
t1a = (patch914575_to1 + '123\n'*10)*3
f1b = '456\n'*10 + f1a
t1b = '456\n'*10 + t1a
f1a = f1a.splitlines()
t1a = t1a.splitlines()
f1b = f1b.splitlines()
t1b = t1b.splitlines()
f2 = patch914575_from2.splitlines()
t2 = patch914575_to2.splitlines()
f3 = patch914575_from3
t3 = patch914575_to3
i = difflib.HtmlDiff()
j = difflib.HtmlDiff(tabsize=2)
k = difflib.HtmlDiff(wrapcolumn=14)
full = i.make_file(f1a,t1a,'from','to',context=False,numlines=5)
tables = '\n'.join(
[
'<h2>Context (first diff within numlines=5(default))</h2>',
i.make_table(f1a,t1a,'from','to',context=True),
'<h2>Context (first diff after numlines=5(default))</h2>',
i.make_table(f1b,t1b,'from','to',context=True),
'<h2>Context (numlines=6)</h2>',
i.make_table(f1a,t1a,'from','to',context=True,numlines=6),
'<h2>Context (numlines=0)</h2>',
i.make_table(f1a,t1a,'from','to',context=True,numlines=0),
'<h2>Same Context</h2>',
i.make_table(f1a,f1a,'from','to',context=True),
'<h2>Same Full</h2>',
i.make_table(f1a,f1a,'from','to',context=False),
'<h2>Empty Context</h2>',
i.make_table([],[],'from','to',context=True),
'<h2>Empty Full</h2>',
i.make_table([],[],'from','to',context=False),
'<h2>tabsize=2</h2>',
j.make_table(f2,t2),
'<h2>tabsize=default</h2>',
i.make_table(f2,t2),
'<h2>Context (wrapcolumn=14,numlines=0)</h2>',
k.make_table(f3.splitlines(),t3.splitlines(),context=True,numlines=0),
'<h2>wrapcolumn=14,splitlines()</h2>',
k.make_table(f3.splitlines(),t3.splitlines()),
'<h2>wrapcolumn=14,splitlines(True)</h2>',
k.make_table(f3.splitlines(True),t3.splitlines(True)),
])
actual = full.replace('</body>','\n%s\n</body>' % tables)
# temporarily uncomment next two lines to baseline this test
#with open('test_difflib_expect.html','w') as fp:
# fp.write(actual)
with open(findfile('test_difflib_expect.html')) as fp:
self.assertEqual(actual, fp.read())
def test_recursion_limit(self):
# Check if the problem described in patch #1413711 exists.
limit = sys.getrecursionlimit()
old = [(i%2 and "K:%d" or "V:A:%d") % i for i in range(limit*2)]
new = [(i%2 and "K:%d" or "V:B:%d") % i for i in range(limit*2)]
difflib.SequenceMatcher(None, old, new).get_opcodes()
class TestOutputFormat(unittest.TestCase):
def test_tab_delimiter(self):
args = ['one', 'two', 'Original', 'Current',
'2005-01-26 23:30:50', '2010-04-02 10:20:52']
ud = difflib.unified_diff(*args, lineterm='')
self.assertEqual(list(ud)[0:2], [
"--- Original\t2005-01-26 23:30:50",
"+++ Current\t2010-04-02 10:20:52"])
cd = difflib.context_diff(*args, lineterm='')
self.assertEqual(list(cd)[0:2], [
"*** Original\t2005-01-26 23:30:50",
"--- Current\t2010-04-02 10:20:52"])
def test_no_trailing_tab_on_empty_filedate(self):
args = ['one', 'two', 'Original', 'Current']
ud = difflib.unified_diff(*args, lineterm='')
self.assertEqual(list(ud)[0:2], ["--- Original", "+++ Current"])
cd = difflib.context_diff(*args, lineterm='')
self.assertEqual(list(cd)[0:2], ["*** Original", "--- Current"])
def test_main():
difflib.HtmlDiff._default_prefix = 0
Doctests = doctest.DocTestSuite(difflib)
run_unittest(TestSFpatches, TestSFbugs, TestOutputFormat, Doctests)
if __name__ == '__main__':
test_main()