mirror of
https://github.com/python/cpython.git
synced 2025-11-04 11:49:12 +00:00
112 lines
3.1 KiB
Python
112 lines
3.1 KiB
Python
# Tests StringIO and cStringIO
|
|
|
|
import unittest
|
|
import StringIO
|
|
import cStringIO
|
|
import types
|
|
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
|
|
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()
|
|
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_truncate(self):
|
|
eq = self.assertEqual
|
|
f = self.MODULE.StringIO()
|
|
f.write(self._lines)
|
|
f.seek(10)
|
|
f.truncate()
|
|
eq(f.getvalue(), 'abcdefghij')
|
|
f.seek(0)
|
|
f.truncate(5)
|
|
eq(f.getvalue(), 'abcde')
|
|
f.close()
|
|
self.assertRaises(ValueError, f.write, 'frobnitz')
|
|
|
|
def test_iterator(self):
|
|
eq = self.assertEqual
|
|
unless = self.failUnless
|
|
it = iter(self._fp)
|
|
# Does this object support the iteration protocol?
|
|
unless(hasattr(it, '__iter__'))
|
|
unless(hasattr(it, '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):
|
|
|
|
# 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)
|
|
test_support.run_unittest(TestcStringIO)
|
|
test_support.run_unittest(TestBufferStringIO)
|
|
test_support.run_unittest(TestBuffercStringIO)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|