Fix S2187 FP: Support test attributes deriving from ITestBuilder in NUnit

[dammejed]

Description

I'm seeing S2187 reported when using test fixtures that have test methods that derive from AutoData (an attribute defined in Autofixture.NUnit3) instead of the built-in Test, TestMethod, etc attributes from NUnit.

Such attributes implement the ITestBuilder interface from NUnit, and these tests are correctly detected and run by visual studio.

Repro steps

Create a test fixture in a correctly-configured Test project that uses the NUnit, AutoFixture, and Autofixture.NUnit3 packages, with the following code:

using AutoFixture.NUnit3;
using NUnit.Framework;

namespace FalsePositive
{
    [TestFixture]
    public class FalsePositiveS2187TestFixture
    {
        [AutoData]
        public void AutoDataTest(string sut)
        {
            Assert.NotNull(sut);
        }
    }
}

Expected behavior

No S2187 is raised.

Actual behavior

S2187 is reported on the FalsePositiveS2187TestFixture class.

Known workarounds

• Suppress the issue.
• Put a superfluous Test attribute on at least one method in the affected class.

Related information

• Visual Studio 17.0.5
• SonarLint for VS 2022 version 6.1.0.45943
• I don't know what version of the C# plugin on SonarQube, but we have SonarQube 9.4.0.

As far as I understand it, this could be fixed by additionally blessing methods with attributes that implement the ITestBuilder interface, rather than the specific ones provided by NUnit.
That seems like it'd be fairly straightforward-- I'd be happy to investigate doing so myself.