Test for sending attr conf event after dev restart

Add test that verifies if attribute configuration event is sent to all
subscribers after device restart (regardless if properties have changed).

Author: mliszcz

cpp_test_suite/new_tests/cxx_dserver_misc.cpp

@@ -6,14 +6,15 @@
 #undef SUITE_NAME
 #define SUITE_NAME DServerMiscTestSuite
 
+template <typename TEvent>
 struct EventCallback : public Tango::CallBack
 {
     EventCallback()
         : num_of_all_events(0)
         , num_of_error_events(0)
     {}
 
-    void push_event(Tango::EventData* event)
+    void push_event(TEvent* event)
     {
         num_of_all_events++;
         if (event->err)
@@ -229,7 +230,7 @@ cout << "str = " << str << endl;
      */
     void test_event_subscription_recovery_after_device_restart()
     {
-        EventCallback callback{};
+        EventCallback<Tango::EventData> callback{};
 
         std::string attribute_name = "event_change_tst";
 
@@ -255,6 +256,37 @@ cout << "str = " << str << endl;
         TS_ASSERT_EQUALS(0, callback.num_of_error_events);
     }
 
+    /* Tests that attribute configuration change event
+     * is sent to all subscribers after device restart.
+     */
+    void test_attr_conf_change_event_after_device_restart()
+    {
+        EventCallback<Tango::AttrConfEventData> callback{};
+
+        const std::string attribute_name = "event_change_tst";
+
+        int subscription = 0;
+        TS_ASSERT_THROWS_NOTHING(subscription = device1->subscribe_event(
+            attribute_name,
+            Tango::ATTR_CONF_EVENT,
+            &callback));
+
+        Tango_sleep(1);
+        TS_ASSERT_EQUALS(1, callback.num_of_all_events);
+        TS_ASSERT_EQUALS(0, callback.num_of_error_events);
+
+        {
+            Tango::DeviceData input{};
+            input << device1_name;
+            TS_ASSERT_THROWS_NOTHING(dserver->command_inout("DevRestart", input));
+        }
+
+        Tango_sleep(1);
+        TS_ASSERT_EQUALS(2, callback.num_of_all_events);
+        TS_ASSERT_EQUALS(0, callback.num_of_error_events);
+
+        TS_ASSERT_THROWS_NOTHING(device1->unsubscribe_event(subscription));
+    }
 };
 #undef cout
 #endif // DServerMiscTestSuite_h