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# -*- coding: utf-8 -*-
import sys
import unittest
import Cython.Compiler.StringEncoding as StringEncoding
class StringEncodingTest(unittest.TestCase):
"""
Test the StringEncoding module.
"""
def test_string_contains_lone_surrogates(self):
self.assertFalse(StringEncoding.string_contains_lone_surrogates(u"abc"))
self.assertFalse(StringEncoding.string_contains_lone_surrogates(u"\uABCD"))
self.assertFalse(StringEncoding.string_contains_lone_surrogates(u"\N{SNOWMAN}"))
# This behaves differently in Py2 when freshly parsed and read from a .pyc file,
# but it seems to be a parser bug in Py2, which doesn't hurt us in Cython.
if sys.version_info[0] != 2:
self.assertTrue(StringEncoding.string_contains_lone_surrogates(u"\uD800\uDFFF"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates(u"\uDFFF\uD800"[::-1]))
self.assertTrue(StringEncoding.string_contains_lone_surrogates(u"\uD800"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates(u"\uDFFF"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates(u"\uDFFF\uD800"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates(u"\uD800x\uDFFF"))
def test_string_contains_surrogates(self):
self.assertFalse(StringEncoding.string_contains_surrogates(u"abc"))
self.assertFalse(StringEncoding.string_contains_surrogates(u"\uABCD"))
self.assertFalse(StringEncoding.string_contains_surrogates(u"\N{SNOWMAN}"))
self.assertTrue(StringEncoding.string_contains_surrogates(u"\uD800"))
self.assertTrue(StringEncoding.string_contains_surrogates(u"\uDFFF"))
self.assertTrue(StringEncoding.string_contains_surrogates(u"\uD800\uDFFF"))
self.assertTrue(StringEncoding.string_contains_surrogates(u"\uDFFF\uD800"))
self.assertTrue(StringEncoding.string_contains_surrogates(u"\uD800x\uDFFF"))
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