From: Ron Jeffries <ronjeffries@...>
Date: 2002-02-22T19:39:45+09:00
Subject: Re: recursive require

On Fri, 22 Feb 2002 01:16:02 GMT, Dave Thomas
<Dave@PragmaticProgrammer.com> wrote:

>Ron Jeffries <ronjeffries@REMOVEacm.org> writes:
>
>> Note that the code classes are defined twice. If I do it the other way
>> around, running the test file, then it happens the other way around: the
>> tests are loaded twice and the test files defined twice.
>> 
>> Either way it's weird. Worst of all, the program runs differently
>> depending which file I load first.
>
>Ron:
>
>Ruby won't require or load the same file twice. However, executing the
>file as a main program doesn't count as loading or requiring it, so:
>
>  code.rb
>      require "test"
>
>      puts "code"
>
>
>  test.rb
>      require "code"
>
>      puts "test"
>
>
>When you say 'ruby code.rb', it does
>
>   require "test"  - not yet loaded
>     in test.rb
>       require "code"  - not yet loaded (it thinks)
>         in code.rb (again)
>           require "test"  - already loaded
>           puts "code"
>         back out to test.rb
>       puts "test"
>     back out to code.rb
>   puts "code"

That's what it does, all right. IMO it's a bug or at least very odd. For
example, it will init class variables twice. It also apparently compiles
the upper file twice, which seems, um, sufficient ...

Anyway, what's the /right/ way to have code and tests in the same file
without setting up each project separately, in a simple dumb way
suitable to the likes of me?

Thanks,

Ronald E Jeffries
http://www.XProgramming.com
http://www.objectmentor.com
I'm giving the best advice I have. You get to decide whether it's true for you.