asp.net-mvc – TDD：在ASP.NET MVC 3中测试DataAnnotations的最佳做法是什么？

我正在使用ASP.NET MVC 3和DataAnnotations参与项目.我们在ViewModels类中有DataAnnotations.

您如何为这些验证编写单元测试？

ViewModel示例：

public class AchievementVM
{
    [Required(ErrorMessage = "The title field is required.")]
    [StringLength(100,ErrorMessage = "Title must be 100 characters or less.")]
    public string Title { get; set; }
}

谢谢！

解决方法

var achievement = new AchievementVM();
var context = new ValidationContext(achievement,serviceProvider: null,items: null);
var results = new List<ValidationResult>();

var isValid = Validator.TryValidateObject(achievement,context,results,true);

Assert.IsTrue(results.Any(vr => vr.ErrorMessage == "The title field is required."));

achievement.Title = "Really really long title that violates "
    + "the range constraint and should not be accepted as "
    + "valid input if this has been done correctly.";

Validator.TryValidateObject(achievement,true);

Assert.IsTrue(results.Any(vr => vr.ErrorMessage == "Title must be 100 characters or less."));

无需自定义实用程序来搜索属性的存在. Validator类为您的工作,并填充与MVC基础结构相同的ValidationResult集合.

这个方法的一个很好的写法可以在K. Scott Allen’s blog上找到.

（编辑：安卓应用网）

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