/usr/lib/python2.7/test/test_StringIO.py is in libpython2.7-testsuite 2.7.6-8ubuntu0.5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 | # Tests StringIO and cStringIO
import unittest
import StringIO
import cStringIO
import types
import array
import sys
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._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.read(0), '')
eq(self._fp.readline(0), '')
eq(self._fp.readline(), self._line[10:] + '\n')
eq(len(self._fp.readlines(60)), 2)
self._fp.seek(0)
eq(self._fp.readline(-1), self._line + '\n')
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')
self.assertRaises(IOError, f.truncate, -1)
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_isatty(self):
f = self.MODULE.StringIO()
self.assertRaises(TypeError, f.isatty, None)
self.assertEqual(f.isatty(), False)
f.close()
self.assertRaises(ValueError, f.isatty)
def test_iterator(self):
eq = self.assertEqual
unless = self.assertTrue
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)
self._fp.close()
self.assertRaises(ValueError, self._fp.next)
def test_getvalue(self):
self._fp.close()
self.assertRaises(ValueError, self._fp.getvalue)
@test_support.bigmemtest(test_support._2G + 2**26, memuse=2.001)
def test_reads_from_large_stream(self, size):
linesize = 2**26 # 64 MiB
lines = ['x' * (linesize - 1) + '\n'] * (size // linesize) + \
['y' * (size % linesize)]
f = self.MODULE.StringIO(''.join(lines))
for i, expected in enumerate(lines):
line = f.read(len(expected))
self.assertEqual(len(line), len(expected))
self.assertEqual(line, expected)
self.assertEqual(f.read(), '')
f.seek(0)
for i, expected in enumerate(lines):
line = f.readline()
self.assertEqual(len(line), len(expected))
self.assertEqual(line, expected)
self.assertEqual(f.readline(), '')
f.seek(0)
self.assertEqual(f.readlines(), lines)
self.assertEqual(f.readlines(), [])
f.seek(0)
self.assertEqual(f.readlines(size), lines)
self.assertEqual(f.readlines(), [])
# In worst case cStringIO requires 2 + 1 + 1/2 + 1/2**2 + ... = 4
# bytes per input character.
@test_support.bigmemtest(test_support._2G, memuse=4)
def test_writes_to_large_stream(self, size):
s = 'x' * 2**26 # 64 MiB
f = self.MODULE.StringIO()
n = size
while n > len(s):
f.write(s)
n -= len(s)
s = None
f.write('x' * n)
self.assertEqual(len(f.getvalue()), size)
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
def test_array_support(self):
# Issue #1730114: cStringIO should accept array objects
a = array.array('B', [0,1,2])
f = self.MODULE.StringIO(a)
self.assertEqual(f.getvalue(), '\x00\x01\x02')
def test_unicode(self):
if not test_support.have_unicode: return
# The cStringIO module converts Unicode strings to character
# strings when writing them to cStringIO objects.
# Check that this works.
f = self.MODULE.StringIO()
f.write(u'abcde')
s = f.getvalue()
self.assertEqual(s, 'abcde')
self.assertEqual(type(s), str)
f = self.MODULE.StringIO(u'abcde')
s = f.getvalue()
self.assertEqual(s, 'abcde')
self.assertEqual(type(s), str)
self.assertRaises(UnicodeEncodeError, self.MODULE.StringIO, u'\xf4')
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
class TestMemoryviewcStringIO(TestcStringIO):
constructor = memoryview
def test_main():
test_support.run_unittest(TestStringIO, TestcStringIO)
with test_support.check_py3k_warnings(("buffer.. not supported",
DeprecationWarning)):
test_support.run_unittest(TestBufferStringIO, TestBuffercStringIO)
test_support.run_unittest(TestMemoryviewcStringIO)
if __name__ == '__main__':
test_main()
|