EnsureBuffaloCMD installs current version of buffalo, it should be run before calling RunBuffaloCMD to ensure this is the version of buffalo that is being tested.

InstallOldBuffaloCMD installs a specific version of buffalo for integration tests.

RunBuffaloCMD is useful for integration tests where CMD would want to run a Buffalo command from the fully compiled binary.

RunWithinTempFolder runs the given function on a temporary folder and returns to the original working directory afterwards.