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I'm trying to do this to make unit testing a breeze for myself.

The contents of an example script in question are as follows:

require 'random_utils.rb'
a = SuccessChecker.new

Right now this just opens irb. I'd like to be able to run arbitrary code afterward, so that I might make scripts to make my life easier by requiring files, instantiating classes, populating test conditions, etc.

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up vote 2 down vote accepted

You are executing commands sequentially, so the shell executes irb, waits until irb get closed and executes the next command (in your case require 'random_utils.rb')…

What you want is to provide the script to irb via STDIN

irb <<EOF
require 'random_utils.rb'
a = SuccessChecker.new

But this will probably not do what you want as irb is for interactive use, you should consider using your normal ruby interpreter instead, e.g:

ruby <<EOF
require 'random_utils.rb'
a = SuccessChecker.new
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I have been using irb to load these files manually and poke at the code to test it interactively, so I think that's what I want to do, though I might change my mind :) Thank you for this. I thought it would be some simple character or something. – ac7v Aug 8 '12 at 23:21
@ac7v see i.imgur.com/t6gNQ.png for details, e.g. irb will show return values and echos the commands, that is probably not what you want - there is no real benefit from using irb to run non interactive things. – Ulrich Dangel Aug 8 '12 at 23:25
I suppose I'll just write the testing code in a separate .rb file (for cleanliness). I guess that's the better way of doing it anyway. I consider this an answer. Thank you again. – ac7v Aug 8 '12 at 23:32

Looks like you're ready to take the next step and use a unit testing library.

Here's an introduction to minitest, built into Ruby 1.9.

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Bookmarked. Don't have enough rep to +1 you yet so I'm saying thank you instead! – ac7v Aug 13 '12 at 3:03
Cool, hope you enjoy it :) – Cawflands Aug 13 '12 at 7:03

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