Testing ModelState is always valid in asp.net mvc

Question

When testing my controller\'s actions the ModelState is always valid.

public class Product
{
    public int Id { get; set; }

    [Required]
    [StringLengt         


        

Answer 1

Validation happens when the posted data is bound to the view model. The view model is then passed into the controller. You are skipping part 1 and passing a view model straight into a controller.

You can manually validate a view model using

System.ComponentModel.DataAnnotations.Validator.TryValidateObject()