How to mock view decorator in Django

Consider that I have a simple APIView as below,

from rest_framework.views import APIView
from rest_framework.response import Response


def my_custom_decorator(func):
    def wrap(view, request):
        if request.method.lower():
            raise ValueError("Just for testing")
        return func(view, request)

    return wrap


class SomeAPIView(APIView):

    @my_custom_decorator
    def post(self, request):
        return Response({"message": "Success"})

Note that the view function post(...) is wrapped by the decorator @my_custom_decorator. Noe, I want to write the test for this API and I tried like this

from rest_framework.test import APITestCase
from django.urls import reverse
from unittest.mock import patch


class TestSomeAPIView(APITestCase):

    @patch("sample.views.my_custom_decorator")
    def test_decorator(self, mock_my_custom_decorator):
        url = reverse("some-api-view")
        response = self.client.post(url)
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.json(), {"message": "Success"})

This didn't mock the @my_custom_decorator properly and thus gave me an exception.

Question: How can I mock the @my_custom_decorator to retrieve a successful response?

Notes

• I have seen this SO post, Can I patch a Python decorator before it wraps a function?, I feel that post lacks some examples,

Update - 1

This answer will work only if the test module gets initialized before the initialization of the view module. AFAIK, this kind of loading isn't configurable in Django.

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