Question

I'm currently testing an Active Directory Method that fetches users in Active Directory. My test method is supposed to look for an exception thrown when the string I pass as argument is using illegal characters. Here is my tested method:

public List<ADProperties> SearchUserByName(string name)
{
    try
    {
        //Active Directory properties loading here
        if(condition)
        { 
            //Condition throws ArgumentException because of invalid AD Filter using characters
            return null;
        }
    }
    catch(ArgumentException ae)
    {
        Console.WriteLine("AE caught : "+ae.ToString());
    }
}

I should precise that the line where the exception occurs interrupts my program at this precise point. Here is my test method:

[TestMethod]
[ExpectedException(typeof(ArgumentException))]
public void SearchUserByNameIllegalCharsTest()
{
    string generateChars = new string('*', 10);
    List<ADProperties> test3 = adManager.SearchUserByName(generateChars);
    //ArgumentException is thrown on this call
}

Even though the ArgumentException is thrown, my test still failed, saying the method has not thrown the expected Exception. What am I not seeing here? Thanks for your help.

Answer 1

Note that your method is catching the exception without re-throwing it. To be able to see the exception in the Unit Test you should have a throw statement in your catch:

try {
       //Active Directory properties loading here
       if(condition){ //Condition throws ArgumentException because of invalid AD Filter using characters
          return null;
       }
   }catch(ArgumentException ae){
      Console.WriteLine("AE caught : "+ae.ToString());
      throw;
   }

Answer 2

您不会在任何地方抛出该异常。使用catch语句，没有任何内容告诉外部块或范围发生了异常。您可以在Console.WriteLine

之后添加一个投掷

public List<ADProperties> SearchUserByName(string name)
{
    try
    {
        //Active Directory properties loading here
        if(condition)
        { 
            //Condition throws ArgumentException because of invalid AD Filter using characters
            return null;
        }
    }
    catch(ArgumentException ae)
    {
        Console.WriteLine("AE caught : "+ae.ToString());
        throw ae;
    }
}

或删除try-catch块

public List<ADProperties> SearchUserByName(string name)
{
        //Active Directory properties loading here
        if(condition)
        { 
            //Condition throws ArgumentException because of invalid AD Filter using characters
            return null;
        }
}

ArgumentException not thrown in C# test

2 个答案: