def METHOD_NAME(client, mocker, mock_calls_out_to_GCA):
    mocker.patch("app.service_api_client.get_live_services_data", return_value={"data": service})
    mocker.patch(
        "app.service_api_client.get_stats_by_month",
        return_value={"data": [("2020-11-01", "email", 20)]},
    )
    response = client.get("/")
    assert response.status_code == 200
    assert "Strict-Transport-Security" in response.headers
    assert response.headers["Strict-Transport-Security"] == "max-age=63072000; includeSubDomains; preload"
    assert "Referrer-Policy" in response.headers
    assert response.headers["Referrer-Policy"] == "strict-origin-when-cross-origin"