changeset:   95933:d15c26085591
user:        Yury Selivanov <yselivanov@sprymix.com>
date:        Sat May 09 13:53:57 2015 -0400
files:       Lib/test/test_pep479.py
description:
Issue 22906: Add test file.


diff -r 36a8d935c322 -r d15c26085591 Lib/test/test_pep479.py
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Lib/test/test_pep479.py	Sat May 09 13:53:57 2015 -0400
@@ -0,0 +1,34 @@
+from __future__ import generator_stop
+
+import unittest
+
+
+class TestPEP479(unittest.TestCase):
+    def test_stopiteration_wrapping(self):
+        def f():
+            raise StopIteration
+        def g():
+            yield f()
+        with self.assertRaisesRegex(RuntimeError,
+                                    "generator raised StopIteration"):
+            next(g())
+
+    def test_stopiteration_wrapping_context(self):
+        def f():
+            raise StopIteration
+        def g():
+            yield f()
+
+        try:
+            next(g())
+        except RuntimeError as exc:
+            self.assertIs(type(exc.__cause__), StopIteration)
+            self.assertIs(type(exc.__context__), StopIteration)
+            self.assertTrue(exc.__suppress_context__)
+        else:
+            self.fail('__cause__, __context__, or __suppress_context__ '
+                      'were not properly set')
+
+
+if __name__ == '__main__':
+    unittest.main()