intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 44 insertions, 0 deletions

diff --git a/contrib/tools/cython/Cython/Compiler/Tests/TestStringEncoding.py b/contrib/tools/cython/Cython/Compiler/Tests/TestStringEncoding.py
new file mode 100644
index 00000000000..91d099333a0
--- /dev/null
+++ b/contrib/tools/cython/Cython/Compiler/Tests/TestStringEncoding.py
@@ -0,0 +1,44 @@
+# -*- 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 marshalling 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"))
+
+        # In Py2 with 16bit Unicode, the following is indistinguishable from the 32bit character.
+        obfuscated_surrogate_pair = (u"\uDFFF" + "\uD800")[::-1]
+        if sys.version_info[0] == 2 and sys.maxunicode == 65565:
+            self.assertFalse(StringEncoding.string_contains_lone_surrogates(obfuscated_surrogate_pair))
+        else:
+            self.assertTrue(StringEncoding.string_contains_lone_surrogates(obfuscated_surrogate_pair))
+
+        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"))