Visual Studio 2010 Not Recognizing Unit Test

Question

In an existing solution I added a new Test Project. In my Test Project .cs file I have a class decorated with the [TestClass] attribute and a method decorated with the [TestMethod] attribute. I have verified that in Configuration Manager the build check box is checked for the Test Project (as my google search has revealed was the problem for others with this issue). I have set Test Project as my start up project for the solution. When I try to start the test I get "Can not start test project because the project does not contain any tests". I am really new to unit testing. What am I missing?

[TestClass]
public class UnitTest1
{
    [TestMethod]
    public void TestMethod1()
    {
       Whole bunch of stuff
       Assert.Inconclusive("Done");
    }
 }

Update: So I opened a new instance of VS, went to File => New => Project => Test Project. Did not touch or edit anything. Went straight to the cs file and here are its contents in its entirety:

using Microsoft.VisualStudio.TestTools.UnitTesting;

namespace TestProject2
{
 public class Inspection
 {
    public bool SubmitInsp()
    {
        return true;
    }
 }

 [TestClass]
 public class UnitTest1
 {
    [TestMethod]
    public void TestMethod1()
    {
        Inspection insp = new Inspection();
        bool result = insp.SubmitInsp();

        Assert.IsTrue(result);
    }
 }
}

Same error about the project not containing any test when I try to start it. Also found this in the build output "Could not load file or assembly '~\my documents\visual studio 2010\Projects\TestProject2\bin\Debug\TestProject2.dll' or one of its dependencies. Operation is not supported. (Exception from HRESULT: 0x80131515)"

I don't know that units tests get much simpler than this. What the heck???

Answer 1

I've had the same problem, when tests in an working test project suddenly weren't recognized anymore.

Comparing the project file with one from another working test project showed me that the <ProjectTypeGuids> node was missing from the main <PropertyGroup> node.

Adding this line inside the <PropertyGroup> node solved my problem:

C#:

<ProjectTypeGuids>{3AC096D0-A1C2-E12C-1390-A8335801FDAB};{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}</ProjectTypeGuids>

VB:

<ProjectTypeGuids>{3AC096D0-A1C2-E12C-1390-A8335801FDAB};{F184B08F-C81C-45F6-A57F-5ABD9991F28F}</ProjectTypeGuids>