So, if you’re a big fan of unit-testing or test-driven development, you’ve probably heard of MbUnit and if you’ve been following MbUnit development, then you’ll have at least heard a rumor that with version 3 they were working on a new test-runner, and now it’s finally starting to show up.

It’s open source (under the Apache License), and Gallio is now in Alpha, with support for running MbUnit tests, but also NUnit, xUnit.net and NBehave … and includes integration and tool support which is unparalleled: integration with CCNet and NAnt, MSBuild and the new Microsoft Research testing tool Pex and … well, lots of other tools you can read about on their website … my point is that it has PowerShell integration!

Although Gallio includes it’s own command-line runner called Echo, and a very nice GUI called Icarus, they’ve also included a PowerShell cmdlet test-runner which supports more options that you can shake a stick at (see source code here), including allowing you to choose LocalAppDomain, IsolatedAppDomain, or IsolatedProcess test runners, etc.

That’s all I’ve got for now … this is only the second alpha release, but feel free to check it out anyway, the test model is complete, and it’s actually running tests without major issues.