Let user set a name for a device or autogenerate it

Description

Let user set a name for a device or autogenerate it.

Related Issue

#100 (closed)

Motivation and Context

Users should have the chance to interact with human readable device names instead of UUIDs only.

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

nucleus/principalNetworkDomain_test.go

 package nucleus
 
 import (
+	"errors"
+	"reflect"
+	"testing"
+
 	"code.fbi.h-da.de/cocsn/gosdn/mocks"
 	"code.fbi.h-da.de/cocsn/yang-models/generated/openconfig"
-	"errors"
+
 	"github.com/google/uuid"
 	"github.com/openconfig/ygot/ygot"
 	"github.com/stretchr/testify/mock"
-	"reflect"
-	"testing"
 )
 
 func TestNewPND(t *testing.T) {
@@ -657,7 +659,7 @@ func Test_pndImplementation_ChangeOND(t *testing.T) {
 
 func Test_pndImplementation_GetDevice(t *testing.T) {
 	p := newPnd()
-	d, err := NewDevice(sbi, &GnmiTransportOptions{})
+	d, err := NewDevice(sbi, &GnmiTransportOptions{}, "")
 	if err != nil {
 		t.Error(err)
 		return
@@ -702,6 +704,56 @@ func Test_pndImplementation_GetDevice(t *testing.T) {
 	}
 }
 
+func Test_pndImplementation_GetDeviceByName(t *testing.T) {
+	p := newPnd()
+	d, err := NewDevice(sbi, &GnmiTransportOptions{}, "my-device")
+	if err != nil {
+		t.Error(err)
+		return
+	}
+	if err = p.addDevice(d); err != nil {
+		t.Error(err)
+		return
+	}
+	type args struct {
+		name string
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    ygot.GoStruct
+		wantErr bool
+	}{
+		{
+			name:    "default",
+			args:    args{name: d.Name},
+			want:    sbi.Schema().Root,
+			wantErr: false,
+		},
+		{
+			name:    "device not found",
+			args:    args{name: "test-device"},
+			want:    nil,
+			wantErr: true,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			foundDevice, err := p.getDeviceByName(tt.args.name)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("GetDeviceByName() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if foundDevice != nil {
+				if !reflect.DeepEqual(foundDevice.GoStruct, tt.want) {
+					t.Errorf("GetDeviceByName() got = %v, want %v", foundDevice.GoStruct, tt.want)
+				}
+			}
+
+		})
+	}
+}
+
 func Test_pndImplementation_Confirm(t *testing.T) {
 	tests := []struct {
 		name    string