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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("abc"))
self.assertFalse(StringEncoding.string_contains_lone_surrogates("\uABCD"))
self.assertFalse(StringEncoding.string_contains_lone_surrogates("\N{SNOWMAN}"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates("\uD800\uDFFF"))
obfuscated_surrogate_pair = ("\uDFFF" + "\uD800")[::-1]
self.assertTrue(StringEncoding.string_contains_lone_surrogates(obfuscated_surrogate_pair))
self.assertTrue(StringEncoding.string_contains_lone_surrogates("\uD800"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates("\uDFFF"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates("\uDFFF\uD800"))
self.assertTrue(StringEncoding.string_contains_lone_surrogates("\uD800x\uDFFF"))
def test_string_contains_surrogates(self):
self.assertFalse(StringEncoding.string_contains_surrogates("abc"))
self.assertFalse(StringEncoding.string_contains_surrogates("\uABCD"))
self.assertFalse(StringEncoding.string_contains_surrogates("\N{SNOWMAN}"))
self.assertTrue(StringEncoding.string_contains_surrogates("\uD800"))
self.assertTrue(StringEncoding.string_contains_surrogates("\uDFFF"))
self.assertTrue(StringEncoding.string_contains_surrogates("\uD800\uDFFF"))
self.assertTrue(StringEncoding.string_contains_surrogates("\uDFFF\uD800"))
self.assertTrue(StringEncoding.string_contains_surrogates("\uD800x\uDFFF"))
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