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
|
# Tests StringIO and cStringIO
import unittest
import StringIO
import cStringIO
import types
from test import test_support
class TestGenericStringIO(unittest.TestCase):
# use a class variable MODULE to define which module is being tested
# Line of data to test as string
_line = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!'
# Constructor to use for the test data (._line is passed to this
# constructor)
constructor = str
def setUp(self):
self._line = self.constructor(self._line)
self._lines = self.constructor((self._line + '\n') * 5)
self._fp = self.MODULE.StringIO(self._lines)
def test_reads(self):
eq = self.assertEqual
self.assertRaises(TypeError, self._fp.seek)
eq(self._fp.read(10), self._line[:10])
eq(self._fp.readline(), self._line[10:] + '\n')
eq(len(self._fp.readlines(60)), 2)
def test_writes(self):
f = self.MODULE.StringIO()
self.assertRaises(TypeError, f.seek)
f.write(self._line[:6])
f.seek(3)
f.write(self._line[20:26])
f.write(self._line[52])
self.assertEqual(f.getvalue(), 'abcuvwxyz!')
def test_writelines(self):
f = self.MODULE.StringIO()
f.writelines([self._line[0], self._line[1], self._line[2]])
f.seek(0)
self.assertEqual(f.getvalue(), 'abc')
def test_writelines_error(self):
def errorGen():
yield 'a'
raise KeyboardInterrupt()
f = self.MODULE.StringIO()
self.assertRaises(KeyboardInterrupt, f.writelines, errorGen())
def test_truncate(self):
eq = self.assertEqual
f = self.MODULE.StringIO()
f.write(self._lines)
f.seek(10)
f.truncate()
eq(f.getvalue(), 'abcdefghij')
f.truncate(5)
eq(f.getvalue(), 'abcde')
f.write('xyz')
eq(f.getvalue(), 'abcdexyz')
f.close()
self.assertRaises(ValueError, f.write, 'frobnitz')
def test_closed_flag(self):
f = self.MODULE.StringIO()
self.assertEqual(f.closed, False)
f.close()
self.assertEqual(f.closed, True)
f = self.MODULE.StringIO("abc")
self.assertEqual(f.closed, False)
f.close()
self.assertEqual(f.closed, True)
def test_iterator(self):
eq = self.assertEqual
unless = self.failUnless
eq(iter(self._fp), self._fp)
# Does this object support the iteration protocol?
unless(hasattr(self._fp, '__iter__'))
unless(hasattr(self._fp, 'next'))
i = 0
for line in self._fp:
eq(line, self._line + '\n')
i += 1
eq(i, 5)
class TestStringIO(TestGenericStringIO):
MODULE = StringIO
def test_unicode(self):
if not test_support.have_unicode: return
# The StringIO module also supports concatenating Unicode
# snippets to larger Unicode strings. This is tested by this
# method. Note that cStringIO does not support this extension.
f = self.MODULE.StringIO()
f.write(self._line[:6])
f.seek(3)
f.write(unicode(self._line[20:26]))
f.write(unicode(self._line[52]))
s = f.getvalue()
self.assertEqual(s, unicode('abcuvwxyz!'))
self.assertEqual(type(s), types.UnicodeType)
class TestcStringIO(TestGenericStringIO):
MODULE = cStringIO
import sys
if sys.platform.startswith('java'):
# Jython doesn't have a buffer object, so we just do a useless
# fake of the buffer tests.
buffer = str
class TestBufferStringIO(TestStringIO):
constructor = buffer
class TestBuffercStringIO(TestcStringIO):
constructor = buffer
def test_main():
test_support.run_unittest(
TestStringIO,
TestcStringIO,
TestBufferStringIO,
TestBuffercStringIO
)
if __name__ == '__main__':
test_main()
|
