Test CORS is enabled via the Django test client

django_test_client_cors.py

    from django.test import TestCase
    
    class ApiTests(TestCase):
        def test_cors_enabled(self):
            """Make sure CORS is enabled a given endpoint

            # Technique inspired from https://stackoverflow.com/a/47609921
            """
            request_headers = {
                "HTTP_ACCESS_CONTROL_REQUEST_METHOD": "GET",
                "HTTP_ORIGIN": "http://somethingelse.com",
            }
            response = self.client.get(
                "/my-api-endpoint", {}, **request_headers
            )
            self.assertEqual(response.headers["Access-Control-Allow-Origin"], "*")