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MassTransit.TestFramework InMemoryTestFixture class causes NUnit 3.2.0 to throw "Has no TestFixtures"

See original GitHub issue

Simple class that uses InMemoryTestFixture gives error trying to run tests from Nunit 3.2.0 CLI.

NUnit Console Runner 3.2.0
Copyright (C) 2016 Charlie Poole

Runtime Environment
   OS Version: Microsoft Windows NT 10.0.10240.0
  CLR Version: 4.0.30319.42000

Test Files
    ...ClassLibrary1.dll


Errors and Failures

1) Invalid : ...\ClassLibrary1.dll
Has no TestFixtures

Run Settings
    WorkDirectory: C:\Program Files (x86)\NUnit.org\nunit-console
    ImageRuntimeVersion: 4.0.30319
    ImageTargetFrameworkName: .NETFramework,Version=v4.6
    ImageRequiresX86: False
    ImageRequiresDefaultAppDomainAssemblyResolver: False
    NumberOfTestWorkers: 4

Test Run Summary
  Overall result: Failed
  Test Count: 0, Passed: 0, Failed: 0, Inconclusive: 0, Skipped: 0
  Start time: 2016-03-24 11:48:39Z
    End time: 2016-03-24 11:48:39Z
    Duration: 0.111 seconds

Results (nunit3) saved as TestResult.xml

Class:

namespace ClassLibrary1
{
    using MassTransit.TestFramework;
    using NUnit.Framework;

    [TestFixture]
    public class Class1 : InMemoryTestFixture
    {
    }
}

packages.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="MassTransit" version="3.2.4" targetFramework="net46" />
  <package id="MassTransit.TestFramework" version="3.2.4" targetFramework="net46" />
  <package id="NewId" version="2.1.3" targetFramework="net46" />
  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net46" />
  <package id="NUnit" version="3.2.0" targetFramework="net46" />
</packages>

If you remove inheritance from InMemoryTestFixture then test runs successfully.

namespace ClassLibrary1
{
    using NUnit.Framework;

    [TestFixture]
    public class Class1
    {
    }
}

NUnit Console Runner 3.2.0
Copyright (C) 2016 Charlie Poole

Runtime Environment
   OS Version: Microsoft Windows NT 10.0.10240.0
  CLR Version: 4.0.30319.42000

Test Files
    ...\ClassLibrary1.dll


Run Settings
    WorkDirectory: C:\Program Files (x86)\NUnit.org\nunit-console
    ImageRuntimeVersion: 4.0.30319
    ImageTargetFrameworkName: .NETFramework,Version=v4.6
    ImageRequiresX86: False
    ImageRequiresDefaultAppDomainAssemblyResolver: False
    NumberOfTestWorkers: 4

Test Run Summary
  Overall result: Passed
  Test Count: 0, Passed: 0, Failed: 0, Inconclusive: 0, Skipped: 0
  Start time: 2016-03-24 11:53:07Z
    End time: 2016-03-24 11:53:07Z
    Duration: 0.061 seconds

Results (nunit3) saved as TestResult.xml

Also works correctly referencing BusTestFixture directly.

namespace ClassLibrary1
{
    using MassTransit;
    using MassTransit.TestFramework;
    using NUnit.Framework;

    [TestFixture]
    public class Class1 : BusTestFixture
    {
        protected override IBus Bus { get; }
    }
}

NUnit Console Runner 3.2.0
Copyright (C) 2016 Charlie Poole

Runtime Environment
   OS Version: Microsoft Windows NT 10.0.10240.0
  CLR Version: 4.0.30319.42000

Test Files
    ...\ClassLibrary1.dll


Run Settings
    WorkDirectory: C:\Program Files (x86)\NUnit.org\nunit-console
    ImageRuntimeVersion: 4.0.30319
    ImageTargetFrameworkName: .NETFramework,Version=v4.6
    ImageRequiresX86: False
    ImageRequiresDefaultAppDomainAssemblyResolver: False
    NumberOfTestWorkers: 4

Test Run Summary
  Overall result: Passed
  Test Count: 0, Passed: 0, Failed: 0, Inconclusive: 0, Skipped: 0
  Start time: 2016-03-24 11:54:33Z
    End time: 2016-03-24 11:54:33Z
    Duration: 0.073 seconds

Results (nunit3) saved as TestResult.xml

Supposed to be NUnit version issue as works correctly with NUnit 2.6.4, but fails with 3+.

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="MassTransit" version="3.2.4" targetFramework="net46" />
  <package id="MassTransit.TestFramework" version="3.2.4" targetFramework="net46" />
  <package id="NewId" version="2.1.3" targetFramework="net46" />
  <package id="Newtonsoft.Json" version="7.0.1" targetFramework="net46" />
  <package id="NUnit" version="2.6.4" targetFramework="net46" />
</packages>