mirror of https://github.com/python/cpython
125 lines
3.9 KiB
Python
125 lines
3.9 KiB
Python
# Tests universal newline support for both reading and parsing files.
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import io
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import _pyio as pyio
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import unittest
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import os
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import sys
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from test.support import os_helper
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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 any default " +
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"buffer limits that exist in io.py 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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class CTest:
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open = io.open
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class PyTest:
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open = staticmethod(pyio.open)
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class TestGenericUnivNewlines:
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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 = 'r'
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WRITEMODE = 'wb'
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def setUp(self):
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data = self.DATA
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if "b" in self.WRITEMODE:
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data = data.encode("ascii")
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with self.open(os_helper.TESTFN, self.WRITEMODE) as fp:
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fp.write(data)
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def tearDown(self):
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try:
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os.unlink(os_helper.TESTFN)
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except:
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pass
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def test_read(self):
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with self.open(os_helper.TESTFN, self.READMODE) as fp:
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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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with self.open(os_helper.TESTFN, self.READMODE) as fp:
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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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with self.open(os_helper.TESTFN, self.READMODE) as fp:
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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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with self.open(os_helper.TESTFN, self.READMODE) as fp:
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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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class TestCRNewlines(TestGenericUnivNewlines):
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NEWLINE = '\r'
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DATA = DATA_CR
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class CTestCRNewlines(CTest, TestCRNewlines, unittest.TestCase): pass
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class PyTestCRNewlines(PyTest, TestCRNewlines, unittest.TestCase): pass
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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 CTestLFNewlines(CTest, TestLFNewlines, unittest.TestCase): pass
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class PyTestLFNewlines(PyTest, TestLFNewlines, unittest.TestCase): pass
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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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with self.open(os_helper.TESTFN, self.READMODE) as fp:
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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 CTestCRLFNewlines(CTest, TestCRLFNewlines, unittest.TestCase): pass
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class PyTestCRLFNewlines(PyTest, TestCRLFNewlines, unittest.TestCase): pass
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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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class CTestMixedNewlines(CTest, TestMixedNewlines, unittest.TestCase): pass
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class PyTestMixedNewlines(PyTest, TestMixedNewlines, unittest.TestCase): pass
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if __name__ == '__main__':
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unittest.main()
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