VGC UT coverage upto 40%

Change-Id: Ifb2886a44ff49128ecddb2100f524b5274d0a063
diff --git a/internal/pkg/vpagent/common_test.go b/internal/pkg/vpagent/common_test.go
new file mode 100644
index 0000000..73e7fde
--- /dev/null
+++ b/internal/pkg/vpagent/common_test.go
@@ -0,0 +1,74 @@
+/*
+* 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 vpagent Common Logger initialization
+package vpagent
+
+import (
+	"context"
+	"errors"
+	"testing"
+)
+
+func Test_isConnCanceled(t *testing.T) {
+	type args struct {
+		err error
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "isConnCanceled",
+			args: args{
+				err: context.Canceled,
+			},
+			want: true,
+		},
+		{
+			name: "error_nil",
+			args: args{
+				err: nil,
+			},
+			want: false,
+		},
+		{
+			name: "the client connection is closing",
+			args: args{
+				err: errors.New("Not Found"),
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			switch tt.name {
+			case "isConnCanceled":
+				if got := isConnCanceled(tt.args.err); got != tt.want {
+					t.Errorf("isConnCanceled() = %v, want %v", got, tt.want)
+				}
+			case "error_nil":
+				if got := isConnCanceled(tt.args.err); got != tt.want {
+					t.Errorf("isConnCanceled() = %v, want %v", got, tt.want)
+				}
+			case "the client connection is closing":
+				if got := isConnCanceled(tt.args.err); got != tt.want {
+					t.Errorf("isConnCanceled() = %v, want %v", got, tt.want)
+				}
+			}
+		})
+	}
+}