[rspec-users] mocking the shell command (Kernel module)

Matt Wynne matt at mattwynne.net
Fri Sep 12 09:29:05 EDT 2008

On 12 Sep 2008, at 14:12, Joaquin Rivera Padron wrote:

> what is the best (or any) way of mocking the running of shell  
> commands?
> e.g.
> code like the following:
> def method
>   %{ ls }
> end
> spec:
> it "should list the directory contents"
>   shell = mock(Object) # %{} lives in Kernel module and its sugar  
> for `
>   shell.should_receive(:`).with(:ls)
> end
> sorry about latter one, thanks in advance
> joaquin

I suggest you put a 'seam' between your code and the call the Kernel.

See Pat's excellent answer to a similar question in this thread:


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