Question

Trying to unit test functions which access a entity framework. So i tried to put all the entity code into the test function below? However it stops at the Linq statement; obviously trying to access the database is too much drama for it. Maybe a work around would be too to create a replica database within the unit test function based on sql lite or compact;(Its not a big database anyways) then execution would not have to leave the test function? Is this possible and how would i implement it?

public void RetreiveKeyFnTest()
    {
        StegApp target = new StegApp(); // TODO: Initialize to an appropriate value
        string username = "david"; // TODO: Initialize to an appropriate value
        string password = "david1"; // TODO: Initialize to an appropriate value
        string ConnectionString = ConfigurationManager.ConnectionStrings["DatabaseEntities"].ToString();
        var dataContext = new DatabaseEntities(ConnectionString);
        var user = dataContext.Users.FirstOrDefault(u => u.Username.Equals(username) && u.Password.Equals(password));
        Assert.IsNotNull(user);

        //target.RetreiveKeyFn(username, password);
        //Assert.IsInstanceOfType(target.RetreiveLogs,typeof(DataAccess));
        //Assert.IsInstanceOfType(target.p);
        //Assert.IsNotNull(target.RetreiveLogs.AuthenitcateCredentials(username,password));
        //Assert.Inconclusive("A method that does not return a value cannot be verified.");
    }

Below is the code i am trying to test:

public void RetreiveKeyFn(string username, string password)
    {

        BusinessObjects.User p = RetreiveLogs.AuthenitcateCredentials(username,password);
        if (p != null)
        {
            if (RetreiveLogs.RetreiveMessages(p.UserId) == null)
            {
                DisplayLogs.Text = "Sorry No messages for you recorded in Database, your correspondant might have chose not to record the entry";
            }
            else
            {
                MessageBox.Show("LogId = " + RetreiveLogs.RetreiveMessages(p.UserId).LogId + "\n" +
                "UserId = " + RetreiveLogs.RetreiveMessages(p.UserId).UserId + "\n" +
                "Message Key = " + RetreiveLogs.RetreiveMessages(p.UserId).MessageKey + "\n" + "PictureId = " + RetreiveLogs.RetreiveMessages(p.UserId).PictureId +
                " Date & time = " + RetreiveLogs.RetreiveMessages(p.UserId).SentDateTime);
                DisplayLogs.Visible = true;
            }
        }
        else
        {
            MessageBox.Show("Please enter your correct username and password in order to retreive either key, image or both from Databse");
        }


    }

Answer 1

I got my unit tests to work fine. The mistake i had was not to copy the app.config file into the test project! Although to be honest i expected Visual studio would have done that anyways.