
As Edward George reported in https://github.com/eventlet/eventlet/pull/3 There is no /bin/true on Darwin, it is in /usr/bin/true instead. So we use the fact that Popen() calls execvp(3) which searches for file in PATH.
The tests are intended to be run using Nose. http://somethingaboutorange.com/mrl/projects/nose/ To run tests, simply install nose, and then, in the eventlet tree, do: $ nosetests That's it! Its output is the same as unittest's output. It tends to emit a lot of tracebacks from various poorly-behaving tests, but they still (generally) pass.