Complete notification expiry and configurable durable delivery (#36)

backend/notifications/transport/server_test.go

@@ -64,3 +64,12 @@ func TestGRPCAuthenticationAndMapping(t *testing.T) {
 		t.Fatal(err)
 	}
 }
+
+func TestCancellationStatus(t *testing.T) {
+	if status.Code(rpcError(merrors.OpaqueWrap(merrors.ErrServiceUnavailable, context.Canceled, "storage"))) != codes.Canceled {
+		t.Fatal("cancellation lost at transport boundary")
+	}
+	if status.Code(rpcError(context.DeadlineExceeded)) != codes.DeadlineExceeded {
+		t.Fatal("deadline lost at transport boundary")
+	}
+}