diff --git a/internal/pkg/application/util_test.go b/internal/pkg/application/util_test.go
new file mode 100644
index 0000000..74774d9
--- /dev/null
+++ b/internal/pkg/application/util_test.go
@@ -0,0 +1,89 @@
+/*
+* Copyright 2022-present Open Networking Foundation
+* Licensed under the Apache License, Version 2.0 (the "License");
+* you may not use this file except in compliance with the License.
+* You may obtain a copy of the License at
+*
+* http://www.apache.org/licenses/LICENSE-2.0
+*
+* Unless required by applicable law or agreed to in writing, software
+* distributed under the License is distributed on an "AS IS" BASIS,
+* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+* See the License for the specific language governing permissions and
+* limitations under the License.
+ */
+
+package application
+
+import (
+	"testing"
+
+	"github.com/google/gopacket/layers"
+)
+
+func TestGetMetadataForL2Protocol(t *testing.T) {
+	type args struct {
+		etherType layers.EthernetType
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    uint8
+		wantErr bool
+	}{
+		{
+			name: "EthernetTypeDot1QDoubleTag",
+			args: args{
+				etherType: layers.EthernetTypeDot1QDoubleTag,
+			},
+			want: 2,
+		},
+		{
+			name: "EthernetTypeQinQDoubleTag",
+			args: args{
+				etherType: layers.EthernetTypeQinQDoubleTag,
+			},
+			want: 3,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			switch tt.name {
+			case "EthernetTypeDot1QDoubleTag", "EthernetTypeQinQDoubleTag":
+				got, err := GetMetadataForL2Protocol(tt.args.etherType)
+				if (err != nil) != tt.wantErr {
+					t.Errorf("GetMetadataForL2Protocol() error = %v, wantErr %v", err, tt.wantErr)
+					return
+				}
+				if got != tt.want {
+					t.Errorf("GetMetadataForL2Protocol() = %v, want %v", got, tt.want)
+				}
+			}
+		})
+	}
+}
+
+func Test_convertToUInt64(t *testing.T) {
+	type args struct {
+		data string
+	}
+	tests := []struct {
+		name string
+		args args
+		want uint64
+	}{
+		{
+			name: "ParseUint_error",
+			args: args{
+				data: "test",
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := convertToUInt64(tt.args.data); got != tt.want {
+				t.Errorf("convertToUInt64() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}