Testing CSV Parser and Column Mapping

Question

I am really starting to enjoy unit testing and asking the next question from unit testing gurum.

Suppose, for example, that I have the following class

public class FileMapper
{
   public Dictionary<string, string> ReadFile(string filename, string delimeter){}
}

How do you guys usually go about unit testing the Parser or ReadFile method in my case?

Answer 1

Given the method signature you provided, you can simply "unit test the ReadFile method by calling it with many different inputs and confirm the return value is correct.

Obscure Tests, , .

TDD , API.

, , :

public Dictionary<string, string> ReadFile(TextReader reader, string delimeter)

TextReader , StringReader unit test.

unit test ReadFile, , .