diff --git a/engine/mapevent_test.go b/engine/mapevent_test.go
new file mode 100644
index 000000000..872ca9899
--- /dev/null
+++ b/engine/mapevent_test.go
@@ -0,0 +1,116 @@
+/*
+Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
+Copyright (C) ITsysCOM GmbH
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or56
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program.  If not, see <http://www.gnu.org/licenses/>
+*/
+
+package engine
+
+import (
+	"reflect"
+	"testing"
+	//"time"
+	// "github.com/cgrates/cgrates/config"
+	"github.com/cgrates/cgrates/utils"
+)
+
+var mapEv = MapEvent(map[string]interface{}{
+	"test1": nil,
+	"test2": 42,
+	"test3": 42.3,
+	"test4": true,
+	"test5": "test",
+})
+
+func TestMapEventNewMapEvent(t *testing.T) {
+	expected := MapEvent(make(map[string]interface{}))
+	rply := NewMapEvent(nil)
+	if !reflect.DeepEqual(expected, rply) {
+		t.Errorf("Expecting %+v, received: %+v", expected, rply)
+	}
+	mp := map[string]interface{}{
+		"test1": nil,
+		"test2": 42,
+		"test3": 42.3,
+		"test4": true,
+		"test5": "test",
+	}
+	expected = MapEvent(mp)
+	rply = NewMapEvent(mp)
+	if !reflect.DeepEqual(expected, rply) {
+		t.Errorf("Expecting %+v, received: %+v", expected, rply)
+	}
+}
+
+func TestMapEventString(t *testing.T) {
+	me := NewMapEvent(nil)
+	expected := utils.ToJSON(me)
+	rply := me.String()
+	if !reflect.DeepEqual(expected, rply) {
+		t.Errorf("Expecting %+v, received: %+v", expected, rply)
+	}
+	expected = utils.ToJSON(mapEv)
+	rply = mapEv.String()
+	if !reflect.DeepEqual(expected, rply) {
+		t.Errorf("Expecting %+v, received: %+v", expected, rply)
+	}
+}
+
+func TestMapEventHasField(t *testing.T) {
+	me := NewMapEvent(nil)
+	expected := false
+	rply := me.HasField("test1")
+	if !reflect.DeepEqual(expected, rply) {
+		t.Errorf("Expecting %+v, received: %+v", expected, rply)
+	}
+	expected = true
+	rply = mapEv.HasField("test2")
+	if !reflect.DeepEqual(expected, rply) {
+		t.Errorf("Expecting %+v, received: %+v", expected, rply)
+	}
+	expected = false
+	rply = mapEv.HasField("test7")
+	if !reflect.DeepEqual(expected, rply) {
+		t.Errorf("Expecting %+v, received: %+v", expected, rply)
+	}
+}
+
+func TestMapEventGetString(t *testing.T) {
+	if _, err := mapEv.GetString("test"); err != utils.ErrNotFound {
+		t.Errorf("Expected: %+v, received: %+v", utils.ErrNotFound, err)
+	}
+	strI, err := mapEv.GetString("test2")
+	if strI != "42" || err != nil {
+		t.Errorf("Expecting %+v, received: %+v", "42", strI)
+	}
+	strI, err = mapEv.GetString("test1")
+	if strI != "null" || err != nil {
+		t.Errorf("Expecting %+v, received: %+v", "null", strI)
+	}
+}
+
+func TestMapEventGetStringIgnoreErrors(t *testing.T) {
+	if s := mapEv.GetStringIgnoreErrors("test"); s != "" {
+		t.Errorf("Expected: %+v, received: %+v", "", s)
+	}
+	strI := mapEv.GetStringIgnoreErrors("test2")
+	if strI != "42" {
+		t.Errorf("Expecting %+v, received: %+v", "42", strI)
+	}
+	strI = mapEv.GetStringIgnoreErrors("test1")
+	if strI != "null" {
+		t.Errorf("Expecting %+v, received: %+v", "null", strI)
+	}
+}