1 files changed, 29 insertions, 0 deletions
diff --git a/Lib/test/test_generators.py b/Lib/test/test_generators.py
index 7956bdd..7eac9d0 100644
--- a/Lib/test/test_generators.py
+++ b/Lib/test/test_generators.py
@@ -9,6 +9,35 @@ import inspect
 
 from test import support
 
+_testcapi = support.import_module('_testcapi')
+
+
+# This tests to make sure that if a SIGINT arrives just before we send into a
+# yield from chain, the KeyboardInterrupt is raised in the innermost
+# generator (see bpo-30039).
+class SignalAndYieldFromTest(unittest.TestCase):
+
+    def generator1(self):
+        return (yield from self.generator2())
+
+    def generator2(self):
+        try:
+            yield
+        except KeyboardInterrupt:
+            return "PASSED"
+        else:
+            return "FAILED"
+
+    def test_raise_and_yield_from(self):
+        gen = self.generator1()
+        gen.send(None)
+        try:
+            _testcapi.raise_SIGINT_then_send_None(gen)
+        except BaseException as _exc:
+            exc = _exc
+        self.assertIs(type(exc), StopIteration)
+        self.assertEqual(exc.value, "PASSED")
+
 
 class FinalizationTest(unittest.TestCase):