test_runicode.py Hypothesisation

test_runicode..diff

diff -r c4d20dd5b286 rpython/rlib/test/test_runicode.py
--- a/rpython/rlib/test/test_runicode.py	Sun Mar 13 07:45:49 2016 +0200
+++ b/rpython/rlib/test/test_runicode.py	Sun Mar 13 18:48:35 2016 +0200
@@ -4,6 +4,8 @@
 import sys, random
 from rpython.rlib import runicode

+from hypothesis import given, settings, strategies
+

 def test_unichr():
     assert runicode.UNICHR(0xffff) == u'\uffff'
@@ -172,6 +174,17 @@
                              "utf-32 utf-32-be utf-32-le").split():
                 self.checkdecode(uni, encoding)

+    # Same as above, but uses Hypothesis to generate non-surrogate unicode
+    # characters.
+    @settings(max_examples=10000)
+    @given(strategies.characters(blacklist_categories=["Cs"]))
+    def test_random_hypothesis(self, uni):
+        if sys.version >= "2.7":
+            self.checkdecode(uni, "utf-7")
+        for encoding in ("utf-8 utf-16 utf-16-be utf-16-le "
+                         "utf-32 utf-32-be utf-32-le").split():
+            self.checkdecode(uni, encoding)
+
     def test_maxunicode(self):
         uni = unichr(sys.maxunicode)
         if sys.version >= "2.7":