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//usr/lib/python2.4/test/test_univnewlines.py
# Tests universal newline support for both reading and parsing files. import unittest import os import sys from test import test_support if not hasattr(sys.stdin, 'newlines'): raise test_support.TestSkipped, \ "This Python does not have universal newline support" FATX = 'x' * (2**14) DATA_TEMPLATE = [ "line1=1", "line2='this is a very long line designed to go past the magic " + "hundred character limit that is inside fileobject.c and which " + "is meant to speed up the common case, but we also want to test " + "the uncommon case, naturally.'", "def line3():pass", "line4 = '%s'" % FATX, ] DATA_LF = "\n".join(DATA_TEMPLATE) + "\n" DATA_CR = "\r".join(DATA_TEMPLATE) + "\r" DATA_CRLF = "\r\n".join(DATA_TEMPLATE) + "\r\n" # Note that DATA_MIXED also tests the ability to recognize a lone \r # before end-of-file. DATA_MIXED = "\n".join(DATA_TEMPLATE) + "\r" DATA_SPLIT = [x + "\n" for x in DATA_TEMPLATE] del x class TestGenericUnivNewlines(unittest.TestCase): # use a class variable DATA to define the data to write to the file # and a class variable NEWLINE to set the expected newlines value READMODE = 'U' WRITEMODE = 'wb' def setUp(self): fp = open(test_support.TESTFN, self.WRITEMODE) fp.write(self.DATA) fp.close() def tearDown(self): try: os.unlink(test_support.TESTFN) except: pass def test_read(self): fp = open(test_support.TESTFN, self.READMODE) data = fp.read() self.assertEqual(data, DATA_LF) self.assertEqual(repr(fp.newlines), repr(self.NEWLINE)) def test_readlines(self): fp = open(test_support.TESTFN, self.READMODE) data = fp.readlines() self.assertEqual(data, DATA_SPLIT) self.assertEqual(repr(fp.newlines), repr(self.NEWLINE)) def test_readline(self): fp = open(test_support.TESTFN, self.READMODE) data = [] d = fp.readline() while d: data.append(d) d = fp.readline() self.assertEqual(data, DATA_SPLIT) self.assertEqual(repr(fp.newlines), repr(self.NEWLINE)) def test_seek(self): fp = open(test_support.TESTFN, self.READMODE) fp.readline() pos = fp.tell() data = fp.readlines() self.assertEqual(data, DATA_SPLIT[1:]) fp.seek(pos) data = fp.readlines() self.assertEqual(data, DATA_SPLIT[1:]) def test_execfile(self): namespace = {} execfile(test_support.TESTFN, namespace) func = namespace['line3'] self.assertEqual(func.func_code.co_firstlineno, 3) self.assertEqual(namespace['line4'], FATX) class TestNativeNewlines(TestGenericUnivNewlines): NEWLINE = None DATA = DATA_LF READMODE = 'r' WRITEMODE = 'w' class TestCRNewlines(TestGenericUnivNewlines): NEWLINE = '\r' DATA = DATA_CR class TestLFNewlines(TestGenericUnivNewlines): NEWLINE = '\n' DATA = DATA_LF class TestCRLFNewlines(TestGenericUnivNewlines): NEWLINE = '\r\n' DATA = DATA_CRLF class TestMixedNewlines(TestGenericUnivNewlines): NEWLINE = ('\r', '\n') DATA = DATA_MIXED def test_main(): test_support.run_unittest( TestNativeNewlines, TestCRNewlines, TestLFNewlines, TestCRLFNewlines, TestMixedNewlines ) if __name__ == '__main__': test_main()