Django server: EDR sanity test (#1530)

* EDR queries without instance id works

Django URL's without instance IDs called a method requiring instance
IDs, resulting in a crash.

Instance ID defaults to None, which is also standard for the provider
that ultimately will be called.

Regression test added

* Use fixtures in django server tests

---------

Co-authored-by: Peter Garnæs <pga@dmi.dk>

tests/test_django.py

@@ -4,15 +4,38 @@ import os
 from unittest import mock
 
 import django
+import pytest
 from django.test import Client
 
+from .util import get_test_file_path
 
-@mock.patch.dict(os.environ, {"DJANGO_SETTINGS_MODULE": "django_.settings"})
+
+@pytest.fixture
+@mock.patch.dict(os.environ, {
+    "DJANGO_SETTINGS_MODULE": "django_.settings",
+    "PYGEOAPI_CONFIG": get_test_file_path('pygeoapi-test-config.yml'),
+    "PYGEOAPI_OPENAPI": get_test_file_path('pygeoapi-test-openapi.yml')
+})
 @mock.patch.object(sys, "path", sys.path + ["./pygeoapi"])
-def test_django_landing_page_loads():
+def django_():
     django.setup()
+    return django
 
+
+def test_django_landing_page_loads(django_):
     response = Client(SERVER_NAME="localhost").get("/")
 
     assert response.status_code == HTTPStatus.OK
     assert response.json()["title"] == "pygeoapi default instance"
+
+
+def test_django_edr_without_instance_id(django_):
+    edr_position_query = ("/collections/icoads-sst/position?coords="
+                          "POINT(12.779895 55.783523)&f=json")
+    response = Client(SERVER_NAME="localhost").get(edr_position_query)
+
+    assert response.status_code == HTTPStatus.OK
+    # Validate CoverageJSON is returned
+    response_json = response.json()
+    assert response_json["type"] == "Coverage"
+    assert response_json["domain"]["domainType"] == "Grid"