api.py

from .models import YourModel
from .serializers import YourModelSerialize
from .viewsets import CRUDViewSet

# As good practice, create your viewset using the Resource as Prefix: YourModel
class YourModelViewSet(CRUDViewSet):
    queryset = Invoice.objects.all()
    serializer_class = InvoiceSerializer
    lookup_field = 'id'
    

conftest.py

# This file should be on the project root
import pytest

@pytest.fixture()
def client_api():
    """A Django API client """
    from django.test.client import Client
    return Client()
  

routes.py

from rest_framework import routers

from .api import YourModelViewSet

app_name = 'your-app'

router = routers.SimpleRouter()
router.register(r'your-url/', YourModelViewSet, , base_name='your-app-route')

urlpatterns = router.urls

test_api.py

'''
This file should be on test folder from app or project

Options:
1 - projetct/test
2 - project/your-app/test
'''
import json
import pytest

from rest_framework.status import is_success
from rest_framework.reverse import reverse

from your-app.models import YourModel

def test_get_list(client_api):
    # the list is automatic
    url = reverse('your-app:your-app-route-list')
    response = client_api.get(url)
    assert is_success(response.status_code)

def test_put(client_api):
    # Create a object on your Model
    obj = YourModel.objects.create(some_attr=1)
    
    # The detail is automatic
    url = reverse('your-app:your-app-route-detail', [obj.id])
    data = {'some_attr': 2}
    response = client_api.put(url, data=json.dumps(data), content_type='application/json')
    assert is_success(response.status_code)
    assert response.data['some_attr'] == 2

    stored_data = YourModel.objects.get(id=obj.id)
    assert stored_data.some_attr == 2

viewset.py

from rest_framework import mixins, viewsets

logger = logging.getLogger(__name__)


class CRUDViewSet(mixins.CreateModelMixin,
                  mixins.RetrieveModelMixin,
                  mixins.UpdateModelMixin,
                  mixins.DeleteModelMixin,
                  mixins.ListModelMixin,
                  viewsets.GenericViewSet):