Resolve "Specific paths cant be requested, because the underlying device goStruct can't be filled."

Description

Related Issue

Motivation and Context

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.

Closes #148 (closed)

northbound/server/core_test.go

@@ -63,6 +63,7 @@ func Test_core_Get(t *testing.T) {
 		name    string
 		args    args
 		want    []string
+		length  int
 		wantErr bool
 	}{
 		{
@@ -70,15 +71,28 @@ func Test_core_Get(t *testing.T) {
 			args: args{
 				ctx: context.Background(),
 				request: &pb.GetRequest{
-					All: true,
+					Pid: []string{
+						pndID,
+					},
 				},
 			},
+			length: 1,
 			want: []string{
 				pndID,
 				"test",
 				"test",
 			},
 		},
+		{
+			name: "getAll",
+			args: args{
+				ctx: context.Background(),
+				request: &pb.GetRequest{
+					All: true,
+				},
+			},
+			length: 2,
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
@@ -91,13 +105,19 @@ func Test_core_Get(t *testing.T) {
 				return
 			}
 
-			got := []string{
-				resp.Pnd[0].Id,
-				resp.Pnd[0].Name,
-				resp.Pnd[0].Description,
+			if tt.name == "default" {
+				got := []string{
+					resp.Pnd[0].Id,
+					resp.Pnd[0].Name,
+					resp.Pnd[0].Description,
+				}
+				if !reflect.DeepEqual(got, tt.want) {
+					t.Errorf("core.Get() = %v, want %v", got, tt.want)
+				}
 			}
-			if !reflect.DeepEqual(got, tt.want) {
-				t.Errorf("core.Get() = %v, want %v", got, tt.want)
+			length := len(resp.Pnd)
+			if tt.length != length {
+				t.Errorf("core.Get() = %v, want %v", length, tt.length)
 			}
 		})
 	}