| import test_support,unittest |
| import codecs |
| import StringIO |
| |
| class UTF16Test(unittest.TestCase): |
| |
| spamle = '\xff\xfes\x00p\x00a\x00m\x00s\x00p\x00a\x00m\x00' |
| spambe = '\xfe\xff\x00s\x00p\x00a\x00m\x00s\x00p\x00a\x00m' |
| |
| def test_only_one_bom(self): |
| _,_,reader,writer = codecs.lookup("utf-16") |
| # encode some stream |
| s = StringIO.StringIO() |
| f = writer(s) |
| f.write(u"spam") |
| f.write(u"spam") |
| d = s.getvalue() |
| # check whether there is exactly one BOM in it |
| self.assert_(d == self.spamle or d == self.spambe) |
| # try to read it back |
| s = StringIO.StringIO(d) |
| f = reader(s) |
| self.assertEquals(f.read(), u"spamspam") |
| |
| |
| def test_main(): |
| test_support.run_unittest(UTF16Test) |
| |
| |
| if __name__ == "__main__": |
| test_main() |