RSRP-289052: Bug with parameterized NUnit test fixtures

There is a bug in the way that ReSharper 6.1 handles parameterized test fixtures when the parameter is a boolean type.

The following test does not work. The symptoms are various but it seems that ReSharper is confused about the parameters. Sometimes it only runs the tests with a parameter of 'true', other times it doesn't run any tests, reporting the test run as inconclusive. Once ReSharper has got itself into this confusion then the confusion seems to persist, even if I change the TestFixture to one that I know will run correctly in ReSharper .

My ReSharper settings are default except that I have disabled the shadow-copy feature. I don't know if that setting is relevant.

My version information:

JetBrains ReSharper 6.1 Full Edition
Build 6.1.37.86 on 2011-12-20T21:15:24

The first test class will not work. But the second one will. This second test fixture is how I finally (after many frustrated hours) found a workaround by changing the parameter type from bool to string. In order to apply the workaround, I need to apply the code change and then restart visual studio. If I don't restart VS then ReSharper seems to remember its confused state and stays confused. A bit like the developers who have to battle with this bug :)


Does not work

---

using System.Diagnostics;
using System.Globalization;
using NUnit.Framework;

namespace MoDoc.DataEngine.Tests
{
[TestFixture(true)]
[TestFixture(false)]
public class ResharperBugTest1
{
private bool _parameter;

public ResharperBugTest1(bool parameter)
{
_parameter = parameter;
}

[Test]
public void DummyTest()
{
Debug.WriteLine("Parameter=" + _parameter.ToString(CultureInfo.InvariantCulture));
}
}
}

Works

---

using System;
using System.Diagnostics;
using System.Globalization;
using NUnit.Framework;

namespace MoDoc.DataEngine.Tests
{
[TestFixture("true")]
[TestFixture("false")]
public class ResharperBugTest1
{
private bool _parameter;

public ResharperBugTest1(string parameter)
{
_parameter = Convert.ToBoolean(parameter);
}

[Test]
public void DummyTest()
{
Debug.WriteLine("Parameter=" + _parameter.ToString(CultureInfo.InvariantCulture));
}
}
}