Unit Testing with Monobehaviour

Hello Everyone,
I know this topic has a lot. With different solutions out there. After doing some research I was wondering is this a horrible approach?

I'm not doing an abstract class as I found in the research that the magic functions (Update, Start, etc...) kill the performance and it seems like the other approach is humble object pattern. I was thinking of wrapping all the methods within mono as I need them. This Solution wouldn't help directly with the magic functions but I felt like testing those as just straight public functions would be acceptable.

https://blogs.unity3d.com/2014/06/03/unit-testing-part-2-unit-testing-monobehaviours/
https://blogs.unity3d.com/2015/12/23/1k-update-calls/

As Example

Code (CSharp):

1.  
2.  
3. public interface IMonoWrap
4. {
5.     T InstantiateWrap<T>(T original, Transform parent) where T : Object;
6. }
7.  
8. public class MonoWrap : MonoBehaviour, IMonoWrap
9. {
10.     public T InstantiateWrap<T>(T original, Transform parent) where T : Object
11.     {
12.         return Instantiate(original, parent);
13.     }
14. }
15.  
16. public class HeaderController : MonoBehaviour
17. {
18.     public IMonoWrap monoWrap;
19.  
20.     public AccountController accountPrefab;
21.  
22.     private AccountController _accountController;
23.  
24.     public void Start()
25.     {
26.         monoWrap = new GameObject().AddComponent<MonoWrap>();
27.     }
28.  
29.     public void ShowAccountSettings()
30.     {
31.         if (_accountController == null)
32.         {
33.             _accountController = monoWrap.InstantiateWrap(accountPrefab, this.transform);
34.         } else
35.         {
36.             _accountController.gameObject.SetActive(true);
37.         }
38.     }
39. }
40.  

My Test

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using NUnit.Framework;
4. using UnityEngine;
5. using UnityEngine.TestTools;
6. using NSubstitute;
7.  
8. namespace Tests
9. {
10.     public class HeaderControllerTests
11.     {
12.         private HeaderController SUT;
13.  
14.         [SetUp]
15.         public void Setup()
16.         {
17.             var go = new GameObject();
18.             SUT = go.AddComponent<HeaderController>();
19.             SUT.accountPrefab = new GameObject().AddComponent<AccountController>();
20.             SUT.accountPrefab.gameObject.name = "Account";
21.             SUT.monoWrap = Substitute.For<IMonoWrap>();
22.         }
23.  
24.         [TearDown]
25.         public void TearDown()
26.         {
27.             UnityEngine.Object.DestroyImmediate(SUT.gameObject);
28.         }
29.  
30.         [Test]
31.         public void SimpleTest()
32.         {
33.            
34.         }
35.  
36.         [Test]
37.         public void ShouldAccountShowSettings()
38.         {
39.             SUT.ShowAccountSettings();
40.             SUT.monoWrap.Received().InstantiateWrap(SUT.accountPrefab, SUT.gameObject.transform);
41.         }
42.     }
43. }
44.