# Are there module existing for system test

**URL:** <https://www.ruby-forum.com/t/are-there-module-existing-for-system-test/122260>\
**Category:** Ruby\
**Created:** [December 6, 2007, 12:46am UTC](https://www.ruby-forum.com/t/are-there-module-existing-for-system-test/122260 "2007-12-06T00:46:26Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Tammo\_T](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/ea5d25/32.png) [@Tammo\_T](https://www.ruby-forum.com/u/Tammo_T)\
**Post date:** [December 6, 2007, 12:46am UTC](https://www.ruby-forum.com/t/are-there-module-existing-for-system-test/122260/1 "2007-12-06T00:46:26Z")

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I have looked around a little at rubyforge and RAA.  
I would like to have something like unit tests also for system tests.  
What I  
have in mind is, that I have a ruby-wrapper starting the programs “under  
test” (e.g. Makefiles (but the whole system is running in unix with  
system  
commands (not rake|rant)). I would like to check to somehow “monitor”  
what  
is going on in the unix shell. This implies:

1. The wrapper should fake the system command or at least provide a  
possibility to switch to “own” commands (could be done maybe by  
resetting  
the PATH-Variable)
2. Track which commands are started inside the shell.

Is there hook to see which commands are executed inside a shell?  
I think about using pty,Open3 or shell maybe.  
With respect to that I have another question. When I start a process in  
Open3.popen3 . How can I determine the working directory in that  
subprocess?