mirror of https://github.com/python/cpython
131 lines
3.6 KiB
Python
131 lines
3.6 KiB
Python
# Tests universal newline support for both reading and parsing files.
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import unittest
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import os
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import sys
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from test import test_support
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if not hasattr(sys.stdin, 'newlines'):
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raise unittest.SkipTest, \
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"This Python does not have universal newline support"
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FATX = 'x' * (2**14)
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DATA_TEMPLATE = [
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"line1=1",
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"line2='this is a very long line designed to go past the magic " +
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"hundred character limit that is inside fileobject.c and which " +
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"is meant to speed up the common case, but we also want to test " +
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"the uncommon case, naturally.'",
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"def line3():pass",
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"line4 = '%s'" % FATX,
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]
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DATA_LF = "\n".join(DATA_TEMPLATE) + "\n"
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DATA_CR = "\r".join(DATA_TEMPLATE) + "\r"
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DATA_CRLF = "\r\n".join(DATA_TEMPLATE) + "\r\n"
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# Note that DATA_MIXED also tests the ability to recognize a lone \r
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# before end-of-file.
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DATA_MIXED = "\n".join(DATA_TEMPLATE) + "\r"
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DATA_SPLIT = [x + "\n" for x in DATA_TEMPLATE]
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del x
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class TestGenericUnivNewlines(unittest.TestCase):
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# use a class variable DATA to define the data to write to the file
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# and a class variable NEWLINE to set the expected newlines value
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READMODE = 'U'
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WRITEMODE = 'wb'
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def setUp(self):
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fp = open(test_support.TESTFN, self.WRITEMODE)
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fp.write(self.DATA)
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fp.close()
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def tearDown(self):
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try:
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os.unlink(test_support.TESTFN)
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except:
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pass
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def test_read(self):
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fp = open(test_support.TESTFN, self.READMODE)
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data = fp.read()
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self.assertEqual(data, DATA_LF)
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self.assertEqual(repr(fp.newlines), repr(self.NEWLINE))
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def test_readlines(self):
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fp = open(test_support.TESTFN, self.READMODE)
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data = fp.readlines()
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self.assertEqual(data, DATA_SPLIT)
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self.assertEqual(repr(fp.newlines), repr(self.NEWLINE))
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def test_readline(self):
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fp = open(test_support.TESTFN, self.READMODE)
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data = []
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d = fp.readline()
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while d:
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data.append(d)
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d = fp.readline()
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self.assertEqual(data, DATA_SPLIT)
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self.assertEqual(repr(fp.newlines), repr(self.NEWLINE))
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def test_seek(self):
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fp = open(test_support.TESTFN, self.READMODE)
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fp.readline()
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pos = fp.tell()
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data = fp.readlines()
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self.assertEqual(data, DATA_SPLIT[1:])
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fp.seek(pos)
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data = fp.readlines()
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self.assertEqual(data, DATA_SPLIT[1:])
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def test_execfile(self):
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namespace = {}
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execfile(test_support.TESTFN, namespace)
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func = namespace['line3']
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self.assertEqual(func.func_code.co_firstlineno, 3)
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self.assertEqual(namespace['line4'], FATX)
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class TestNativeNewlines(TestGenericUnivNewlines):
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NEWLINE = None
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DATA = DATA_LF
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READMODE = 'r'
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WRITEMODE = 'w'
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class TestCRNewlines(TestGenericUnivNewlines):
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NEWLINE = '\r'
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DATA = DATA_CR
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class TestLFNewlines(TestGenericUnivNewlines):
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NEWLINE = '\n'
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DATA = DATA_LF
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class TestCRLFNewlines(TestGenericUnivNewlines):
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NEWLINE = '\r\n'
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DATA = DATA_CRLF
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def test_tell(self):
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fp = open(test_support.TESTFN, self.READMODE)
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self.assertEqual(repr(fp.newlines), repr(None))
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data = fp.readline()
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pos = fp.tell()
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self.assertEqual(repr(fp.newlines), repr(self.NEWLINE))
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class TestMixedNewlines(TestGenericUnivNewlines):
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NEWLINE = ('\r', '\n')
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DATA = DATA_MIXED
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def test_main():
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test_support.run_unittest(
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TestNativeNewlines,
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TestCRNewlines,
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TestLFNewlines,
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TestCRLFNewlines,
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TestMixedNewlines
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)
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if __name__ == '__main__':
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test_main()
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