I just saw that Albert Weinert has upgraded the MbUnit test runner plugin to work in ReSharper 4.0, sweet! Since ReSharper 4.0 is still in pre-beta, there is no guarantee that it will work at all, but I'm running the latest nightly builds and IMO its getting more stable every day.
I verified that the MbUnit test runner plugin does work by installing it on against ReSharper 4.0 build 758 and opening the Subtext 1.9 Branch source code. The image to the left shows the ReSharper Unit Test Explorer open and displaying the MbUnit tests from Subtext.
Having such tight integration with ReSharper goes a long way in delivering the kind of frictionless development experience that I'm after. Though to be honest, I'm still a huge fan of TestDriven.net - you just can't beat the Right-click -> Run Test slickness that it brings to the table.
That being said, I know not everyone has TestDriven.net, but a lot of folks are already using ReSharper to increase their productivity and reduce daily development pains. And being able to run MbUnit tests right inside the IDE, via ReSharper, will reduce those pains even more... Low Friction == More Better!
And hopefully this plugin will open a few doors for MbUnit - my xUnit test framework of choice - and increase its adoption rate and market share. :)
So what are you waiting for... go get you some ReSharper + MbUnit love!