fix: update tests for location retrieval to handle 503 responses when no network adapter is set

# ---------------------------------------------------------------------------

class TestStubMode:

    """When NETWORK_ADAPTER_NAME is not set the controller returns a static stub."""

    """When NETWORK_ADAPTER_NAME is not set the controller returns 503 UNAVAILABLE."""

    def test_returns_200_shape(self, flask_app):

        result = call_retrieve_location(flask_app, PAYLOAD_BY_NAI)

        assert isinstance(result, dict)

        assert "lastLocationTime" in result

        assert "area" in result

    def test_returns_503_when_no_adapter(self, flask_app):

        body, status = call_retrieve_location(flask_app, PAYLOAD_BY_NAI)

        assert status == 503

    def test_stub_area_is_circle(self, flask_app):

        result = call_retrieve_location(flask_app, PAYLOAD_BY_NAI)

        assert result["area"]["areaType"] == "CIRCLE"

    def test_503_body_has_code_unavailable(self, flask_app):

        body, status = call_retrieve_location(flask_app, PAYLOAD_BY_NAI)

        assert body.get("code") == "UNAVAILABLE"

    def test_stub_has_center_and_radius(self, flask_app):

        area = call_retrieve_location(flask_app, PAYLOAD_BY_NAI)["area"]

        assert "center" in area

        assert "latitude" in area["center"]

        assert "longitude" in area["center"]

        assert "radius" in area

    def test_503_body_has_message(self, flask_app):

        body, status = call_retrieve_location(flask_app, PAYLOAD_BY_NAI)

        assert "message" in body

        assert "Network Adapter" in body["message"]

    def test_non_json_returns_400(self, flask_app):

        result = call_retrieve_location_plain_text(flask_app)