hectorlee369

   1:          public enum LogType

   2:          {

   3:              [Description("save role")]

   4:              SaveRole,

   5:              [Description("delete role")]

   6:              DeleteRole

   7:          }

   1:          [TestMethod()]

   2:          public void EnumTest()

   3:          {

   4:              // 1. 列舉.ToString() 回傳命名的文字

   5:              Assert.AreEqual("SaveRole", LogDescFactory.LogType.SaveRole.ToString());

   6:   

   7:              // 2. 列舉.GetHashCode 被覆寫了, 回傳 0.

   8:              Assert.AreNotEqual(

   9:                  "SaveRole".GetHashCode(), 

  10:                  LogDescFactory.LogType.SaveRole.GetHashCode());

  11:   

  12:              // 3. 列舉.轉型成integer時, 預設依序0,1,2 ...

  13:              Assert.AreEqual(0, (int)LogDescFactory.LogType.SaveRole);

  14:   

  15:              // 4. 列舉.不轉型時與integer不相等

  16:              Assert.AreNotEqual(0, LogDescFactory.LogType.SaveRole);

  17:   

  18:              // 5. 列舉.有順序的概念(as cast to integer)

  19:              Assert.IsTrue(

  20:                  LogDescFactory.LogType.SaveRole

  21:                  .CompareTo(LogDescFactory.LogType.DeleteRole) < 0);

  22:   

  23:              // 6. 列舉.可偵測是否有定義

  24:              Assert.IsTrue(Enum.IsDefined(typeof(LogDescFactory.LogType), 0));

  25:   

  26:              // 7. 列舉.由integer換回命名的文字

  27:              Assert.AreEqual("SaveRole", Enum.GetName(typeof(LogDescFactory.LogType), 0));

  28:   

  29:              // 8. 列舉.由integer換回物件, *註: 第二個參數是字串型態, 第三個參數是不區分大小寫

  30:              Assert.AreEqual(

  31:                  LogDescFactory.LogType.SaveRole, 

  32:                  Enum.Parse(typeof(LogDescFactory.LogType), "0", true));

  33:   

  34:              // 9. 列舉.取得列舉描述

  35:              Assert.AreEqual(

  36:                  "save role", 

  37:                      typeof(LogDescFactory.LogType)

  38:                          .GetMember(LogDescFactory.LogType.SaveRole.ToString())[0]

  39:                          .GetCustomAttributes(

  40:                              typeof(System.ComponentModel.DescriptionAttribute), false)

  41:                          .Select(x => (System.ComponentModel.DescriptionAttribute)x)

  42:                          .FirstOrDefault()

  43:                          .Description);

  44:          }