Question

So I’m starting to write a class library of useful methods I’ve written and picked up over the years, I’ll start with two examples of code, then ask my specific questions:

I’d also like to make the argument that this is not a duplicate of some of the other, “where do I start unit testin questions.”

Check network connectivity (not internet, just netwok)

    public static Boolean IsNetworkConnected()
    {
        Boolean ret = false;
        try
        {
            String HostName = System.Net.Dns.GetHostName();
            System.Net.IPHostEntry thisHost = System.Net.Dns.GetHostEntry(HostName);
            String thisIpAddr = thisHost.AddressList[0].ToString();

            ret = thisIpAddr != System.Net.IPAddress.Parse("127.0.0.1").ToString();
        }
        catch (Exception)
        {
            return false;
        }
        return ret;
    }

And my IsValiEmail method (note, I didn’t write the regex)

   public const String MatchEmailPattern = @"^(([\w-]+\.)+[\w-]+|([a-zA-Z]{1}|[\w-]{2,}))@"
         + @"((([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\."
         + @"([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])\.([0-1]?[0-9]{1,2}|25[0-5]|2[0-4][0-9])){1}|"
         + @"([a-zA-Z]+[\w-]+\.)+[a-zA-Z]{2,4})$";


    public static bool IsValidEmail(string email)
    {
        if (email != null && email != string.Empty) 
            return Regex.IsMatch(email, MatchEmailPattern);
        else 
            return false;
    }

So, my question is how do I test that these methods actually work, obviously I want to start Unit Testing more of my code which is more complex than these quick examples.

I’d like to avoid installing additional tools/frameworks if possible, but I’m open to your ideas.

update

Where should this new Unit-Test code (via the links already posted) live? In the same assembly? A seperate assembly?

Answer 1

Check out the book. The art of unit testing. The wiki page has a lot of great resources.