FIX: fixed empty bug

src/EventManager/Manager.cpp

@@ -294,6 +294,11 @@
  bool EventManager::Manager::empty() const
  {
    bool isEmpty=true;
+  
+   while(!commandQueue_.empty())
+   {
+     std::this_thread::sleep_for(std::chrono::milliseconds(100));
+   }
 
    for (auto it = eventMap_.begin(); it != eventMap_.end(); ++it)
    {

tests/test_basic.cpp

@@ -87,6 +87,11 @@ SCENARIO("Basic Usage of EventManager", "[Manager]")
       manager = std::make_shared<EventManager::Manager>();
     }());
 
+    REQUIRE_NOTHROW([&]()
+    {
+      manager->start();
+    }());
+
     REQUIRE(manager->empty() == true);
 
     std::shared_ptr<myParticipant> participant0;
@@ -107,11 +112,6 @@ SCENARIO("Basic Usage of EventManager", "[Manager]")
 
     REQUIRE(manager->empty() == false);
 
-    REQUIRE_NOTHROW([&]()
-    {
-      manager->start();
-    }());
-
     REQUIRE(manager->isRunning() == true);
 
     WHEN("emitting shutdown event")