Can't find project classes/methods in test project

Question

In my namespace Draughts I have two projects, Draughts and Draughts.UnitTests. When I try to access Draughts methods/classes in Draughts.UnitTests it can't find anything at all. At the top of Draughts.UnitTests I put using Draughts. Any ideas?

BoardUnitTests.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Draughts;
using NUnit.Framework;

namespace Draughts.UnitTests
{
    public class BoardUnitTests
    {
        private Board GetBoard()
        {
            return true;
        }

        [Test]
        public void CheckValidBoardPosition_ValidPosition_ReturnsTrue()
        {
            Assert.AreEqual(1, 1);
        }
    }
}

In the code above it can't recognize Board which is a class I have defined in Draughts.

Here's a screenshot of my solution explorer:

Note that a `using` directive is _bot_ the same as a [reference](https://msdn.microsoft.com/en-us/library/wkze6zky.aspx). — D Stanley, Nov 09 '16 at 20:20
This was my problem https://stackoverflow.com/questions/1211707/how-to-access-classes-in-another-assembly-for-unit-testing-purposes — Eric Nelson, Jun 09 '17 at 18:02

score 24 · Accepted Answer · edited Nov 27 '21 at 14:53

24

Probably this is related to one of these things

You don't have a reference to Draughts on your unit test project. Right click on the test project, then Add > Reference and select the project being tested.
Classes on Draughts are not public so you can't see them outside the project they belongs to

edited Nov 27 '21 at 14:53

palako

3,342
2
23
33

answered Nov 09 '16 at 20:20

Claudio Redi

67,454
15
130
155

4

Did not know you had to explicitly add a reference through Add > Reference in solution explorer. Thanks. – Dockson Nov 09 '16 at 20:36
#1 here will be the answer 9 out of 10 times. Note that you can break an existing project reference simply by removing the project temporarily and then adding it back in. I highly recommend people read this to know what is going on behind the scenes: https://learn.microsoft.com/en-us/visualstudio/ide/managing-references-in-a-project?view=vs-2022#project-to-project-references – Cale Sweeney Nov 29 '22 at 14:19
Also make sure to compile the test project after adding the reference – joekevinrayan96 Dec 15 '22 at 00:37

score 11 · Answer 2 · answered Jan 05 '18 at 21:49

I realize this is pretty old, but I came across this question while looking for a solution to my issue. For me it turned out that my Test project and the Tested project were on two different versions of the .NET Framework. I updated one, but forgot the other. Once I updated the test project to match the tested, everything worked like it should

Hope this helps the next person! :)

score 1 · Answer 3 · answered Nov 21 '20 at 07:16

I ran into a similar issue as I used dotnet cli to create a test project and .net core project. I forgot to add the test project to my solution (right click solution > add > existing project). Once I did that, everything worked. Not the answer for OP but leaving it here in hopes it might help other people in future.

score 0 · Answer 4 · answered Nov 17 '20 at 19:36

0

In my case it was because I had them compiling on different versions of .net

answered Nov 17 '20 at 19:36

JohnFF

723
5
20

Can't find project classes/methods in test project

4 Answers4