added EventManagerMock, to be extended and moved into fsfw some day

unittest/mocks/EventManagerMock.cpp

@@ -0,0 +1,18 @@
+#include "EventManagerMock.h"
+
+#include <fsfw/ipc/QueueFactory.h>
+
+EventManagerMock::EventManagerMock() : EventManager(objects::EVENT_MANAGER) {}
+
+
+ReturnValue_t EventManagerMock::performOperation(uint8_t opCode) {
+  ReturnValue_t result = HasReturnvaluesIF::RETURN_OK;
+  while (result == HasReturnvaluesIF::RETURN_OK) {
+    EventMessage message;
+    result = eventReportQueue->receiveMessage(&message);
+    if (result == HasReturnvaluesIF::RETURN_OK) {
+      notifyListeners(&message);
+    }
+  }
+  return HasReturnvaluesIF::RETURN_OK;
+}