public void Insert_InvalidObjectPassed_ReturnsBadRequest()
{
var nameMissingItem = new TodoVO()
{
Id = Guid.Parse("6da0e0a9-143e-466e-b594-4ddb3d0fb5d3"), TaskName = "Dentist"
};
_controller.ModelState.AddModelError("Category", "Required");
var badResponse = _controller.Insert(nameMissingItem).Result;
Assert.IsType <BadRequestObjectResult>(badResponse);
}