C#-Asp.net单元测试模型数据注释DataType.EmailAddress？

如何测试DataType.EmailAddress？

我有一个带有电子邮件属性的客户模型,其中包含以下数据注释以进行验证：

[StringLength(100)]
[DataType(DataType.EmailAddress, ErrorMessage = "Email must be a valid email address")]
[Display(Name = "Email")]
[Required(ErrorMessage = "Email is required")]
public string email { get; set; }

我正在编写单元测试来测试验证.我已经弄清楚了如何测试所需的字符串长度.

这是我的方法,可以捕获其他错误,但是不处理DataType验证：

private List<ValidationResult> ValidateModel<T>(T model)
{
    var context = new ValidationContext(model, null, null);
    var result = new List<ValidationResult>();
    var valid = Validator.TryValidateObject(model, context, result, true);

    return result;
}

我用一种测试方法来称呼它：

[TestMethod]
public void Invalid_email_addresses_throw_errors()
{
    var model = new Models.Customer();

    model.email = "";
    var results = ValidateModel(model);
    Assert.IsTrue(results.Any(v => v.ErrorMessage == "Email is required"));
}

如何测试DataType.EmailAddress-传递无效值并接收到错误结果？

解决方法:

使用[EmailAddress] DataTypeAttribute.

EmailAddressAttribute是从DataTypeAttribute派生的,并覆盖IsValid方法,该方法检查该值是否实际上是有效的电子邮件.

使用

[DataType(DataType.EmailAddress, ErrorMessage = "Email must be a valid email address")]

对电子邮件验证不做任何事情.

如果检查DataTypeAttribute的源代码,您将意识到它主要是用于创建自定义和目标验证属性的基本属性.

原始问题中的DataTypeAttribute使用不正确.
除了使用下面的单元测试中所示的EmailAddressAttribute之外,没有其他解决方案.

[TestClass]
public class UnitTestExample {
    [TestMethod]
    public void Invalid_email_addresses_throw_errors() {
        //Arrange
        var badEmail = "1234_)(";
        var subject = new Customer { email = badEmail };

        //Act
        var results = ValidateModel(subject);

        //Assert
        Assert.IsTrue(results.Count > 0);
        Assert.IsTrue(results.Any(v => v.MemberNames.Contains("email")));
    }

    public class Customer {

        [StringLength(100)]            
        [Display(Name = "Email")]
        [Required(ErrorMessage = "Email is required")]
        [EmailAddress(ErrorMessage = "Email must be a valid email address")]
        public string email { get; set; }

    }

    private List<ValidationResult> ValidateModel<T>(T model) {
        var context = new ValidationContext(model, null, null);
        var result = new List<ValidationResult>();
        var valid = Validator.TryValidateObject(model, context, result, true);

        return result;
    }
}

标签：unit-testing,data-annotations,asp-net,c,asp-net-mvc
来源： https://codeday.me/bug/20191111/2018847.html