public void OrderController_ListAll_ReturnsStatusOkAndList()
{
IOrderManager orderManager = new OrderManager();
OrderAPI _controller = new OrderAPI(orderManager);
IActionResult _response = _controller.ListAllOrders();
OkObjectResult _okObject = _response as OkObjectResult;
List <Order> _results = _okObject.Value as List <Order>;
Assert.NotNull(_response);
Assert.Equal((int)HttpStatusCode.OK, _okObject.StatusCode);
Assert.Equal(4, _results.Count);
}