c# - Unit Testing - Session object? -

i have implemented unit of work pattern, , environment using more unit testing. implementation writes session helper writes session. how unit test these aspects in regard session? should make repository pattern? (repository interface concrete session implementation , concrete mock implementation) how done?

i know there more 1 way of approaching this, looking advice.

there 2 ways of doing this.

assuming using .net 3.5 or up. change implementation take httpsessionstatebase object constructor parameter, can mock implementation - there's few tutorials online on how this. can use ioc container wire @ app start or (poor man's dependency injection):

public class myobjectthatusessession {     httpsessionstatebase _session;      public myobjectthatusessession(httpsessionstatebase sesssion)     {          _session = session ?? new httpsessionstatewrapper(httpcontext.current.session);     }      public myobjectthatusessession() : this(null)     {} } 

alternatively, , bit better , more flexible design create test seam wrapping interaction session in object. change database, cookie or cache based implementation later. like:

public class myobjectthatusessession {     istatestorage _storage;      public myobjectthatusessession(istatestorage storage)     {          _storage= storage ?? new sessionstorage();     }      public myobjectthatusessession() : this(null)     {}      public void dosomethingwithsession()     {         var = _storage.get("mysessionkey");         console.writeline("got " + something);     } }  public interface istatestorage {     string get(string key);     void set(string key, string data); }  public class sessionstorage : istatestorage {     //todo: refactor inject httpsessionstatebase rather using httpcontext.      public string get(string key)     {        return httpcontext.current.session[key];     }      public string set(string key, string data)     {        httpcontext.current.session[key] = data;     } } 

you can use moq create mock istatestorage implementation tests or create simple dictionary based implementation.

hope helps.