add tests for customers rest api

backend/customers/tests/test_customers_views.py

@@ -0,0 +1,31 @@
+import pytest
+
+from django.urls import reverse
+
+
+@pytest.mark.django_db
+def test_unauthorized_request_onwer(api_client):
+    url = reverse('owner-list')
+    response = api_client.get(url)
+    assert response.status_code == 403
+
+
+@pytest.mark.django_db
+def test_unauthorized_request_customer(api_client):
+    url = reverse('customer-list')
+    response = api_client.get(url)
+    assert response.status_code == 403
+
+
+@pytest.mark.django_db
+def test_unauthorized_request_device_manufacturer(api_client):
+    url = reverse('device-manufacturer-list')
+    response = api_client.get(url)
+    assert response.status_code == 403
+
+
+@pytest.mark.django_db
+def test_unauthorized_request_locaton(api_client):
+    url = reverse('location-list')
+    response = api_client.get(url)
+    assert response.status_code == 403