core: make Receiver.to_sender() use Router.myself().

mitogen/core.py

@@ -830,8 +830,7 @@ class Receiver(object):
             for msg in recv:
                 print(msg)
         """
-        context = Context(self.router, mitogen.context_id)
-        return Sender(context, self.handle)
+        return Sender(self.router.myself(), self.handle)
 
     def _on_receive(self, msg):
         """

tests/receiver_test.py

@@ -146,5 +146,14 @@ class OnReceiveTest(testlib.RouterMixin, testlib.TestCase):
     # TODO: what happens to a Select subscribed to the receiver in this case?
 
 
+class ToSenderTest(testlib.RouterMixin, testlib.TestCase):
+    klass = mitogen.core.Receiver
+
+    def test_returned_context(self):
+        myself = self.router.myself()
+        recv = self.klass(self.router)
+        self.assertEquals(myself, recv.to_sender().context)
+
+
 if __name__ == '__main__':
     unittest2.main()

tests/router_test.py

@@ -212,6 +212,14 @@ class AddHandlerTest(testlib.TestCase):
             router.broker.join()
 
 
+class MyselfTest(testlib.RouterMixin, testlib.TestCase):
+    def test_myself(self):
+        myself = self.router.myself()
+        self.assertEquals(myself.context_id, mitogen.context_id)
+        # TODO: context should know its own name too.
+        self.assertEquals(myself.name, 'self')
+
+
 class MessageSizeTest(testlib.BrokerMixin, testlib.TestCase):
     klass = mitogen.master.Router