Ensure fuzz targets work as expected.

fuzzing/fuzz_http11_request_parser.py

@@ -20,14 +20,17 @@ def test_one_input(data):
 
     try:
         next(parser)
-    except StopIteration:
-        pass  # request is available in exc.value
+    except StopIteration as exc:
+        assert isinstance(exc.value, Request)
+        return  # input accepted
     except (
         EOFError,  # connection is closed without a full HTTP request
         SecurityError,  # request exceeds a security limit
         ValueError,  # request isn't well formatted
     ):
-        pass
+        return  # input rejected with a documented exception
+
+    raise RuntimeError("parsing didn't complete")
 
 
 def main():

fuzzing/fuzz_http11_response_parser.py

@@ -21,15 +21,18 @@ def test_one_input(data):
     )
     try:
         next(parser)
-    except StopIteration:
-        pass  # response is available in exc.value
+    except StopIteration as exc:
+        assert isinstance(exc.value, Response)
+        return  # input accepted
     except (
         EOFError,  # connection is closed without a full HTTP response
         SecurityError,  # response exceeds a security limit
         LookupError,  # response isn't well formatted
         ValueError,  # response isn't well formatted
     ):
-        pass
+        return  # input rejected with a documented exception
+
+    raise RuntimeError("parsing didn't complete")
 
 
 def main():

fuzzing/fuzz_websocket_parser.py

@@ -28,13 +28,16 @@ def test_one_input(data):
 
     try:
         next(parser)
-    except StopIteration:
-        pass  # response is available in exc.value
+    except StopIteration as exc:
+        assert isinstance(exc.value, Frame)
+        return  # input accepted
     except (
         PayloadTooBig,  # frame's payload size exceeds ``max_size``
         ProtocolError,  # frame contains incorrect values
     ):
-        pass
+        return  # input rejected with a documented exception
+
+    raise RuntimeError("parsing didn't complete")
 
 
 def main():