we use xunit.bddextensions (see https://github.com/BjRo/xunitbddextensions
or NuGet) for our testing framework. This extends the XUnit-Framework with BDD-Style-Extensions. The tests won't show up in JustCode; the test class is derived from e.g. StaticContextSpecification and the assertions are marked with the Observation attribute. If I write a test with "plain" XUnit (marking the assertion with the Fact attribute) these test is recognized by JustCode - but not all the other (BDD-)ones in the same project.
1. The Xunit-Files will be copied to the output directory (as statet in another thread)
2. Xunit 1.7 is used
3. The tests run successfully in XUnit console runner, Gallio and ReSharper (with XUnit-Plugin)