From 78e2351df5f3c2e13f32736ebbe64c7405ee8522 Mon Sep 17 00:00:00 2001
From: Pavel Kirienko <pavel.kirienko@gmail.com>
Date: Tue, 21 Apr 2015 21:46:33 +0300
Subject: [PATCH] Empty service client test (fails to compile due to a mistake
 in template instantiation)

---
 libuavcan/test/node/service_client.cpp | 39 ++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

diff --git a/libuavcan/test/node/service_client.cpp b/libuavcan/test/node/service_client.cpp
index e6a390f2c3..4192bc890c 100644
--- a/libuavcan/test/node/service_client.cpp
+++ b/libuavcan/test/node/service_client.cpp
@@ -10,6 +10,7 @@
 #include <uavcan/protocol/RestartNode.hpp>
 #include <uavcan/protocol/GetDataTypeInfo.hpp>
 #include <root_ns_a/StringService.hpp>
+#include <root_ns_a/EmptyService.hpp>
 #include <queue>
 #include "test_node.hpp"
 
@@ -52,6 +53,12 @@ static void stringServiceServerCallback(const uavcan::ReceivedDataStructure<root
     rsp.string_response += req.string_request;
 }
 
+static void emptyServiceServerCallback(const uavcan::ReceivedDataStructure<root_ns_a::EmptyService::Request>&,
+                                       root_ns_a::EmptyService::Response&)
+{
+    // Nothing to do - the service is empty
+}
+
 
 TEST(ServiceClient, Basic)
 {
@@ -132,6 +139,38 @@ TEST(ServiceClient, Basic)
 }
 
 
+TEST(ServiceClient, Empty)
+{
+    InterlinkedTestNodesWithSysClock nodes;
+
+    // Type registration
+    uavcan::GlobalDataTypeRegistry::instance().reset();
+    uavcan::DefaultDataTypeRegistrator<root_ns_a::EmptyService> _registrator;
+
+    // Server
+    uavcan::ServiceServer<root_ns_a::EmptyService> server(nodes.a);
+    ASSERT_EQ(0, server.start(emptyServiceServerCallback));
+
+    {
+        // Caller
+        typedef uavcan::ServiceClient<root_ns_a::EmptyService,
+                                      typename ServiceCallResultHandler<root_ns_a::EmptyService>::Binder > ClientType;
+        ServiceCallResultHandler<root_ns_a::EmptyService> handler;
+
+        ClientType client(nodes.b);
+
+        client.setCallback(handler.bind());
+
+        root_ns_a::EmptyService::Request request;
+
+        ASSERT_LT(0, client.call(1, request)); // OK
+    }
+
+    // All destroyed - nobody listening
+    ASSERT_EQ(0, nodes.b.getDispatcher().getNumServiceResponseListeners());
+}
+
+
 TEST(ServiceClient, Sizes)
 {
     using namespace uavcan;