From: Eric Hodel <drbrain@...7.net>
Date: 2005-11-09T11:48:57+09:00
Subject: Re: Testing array.push(array)

On Nov 8, 2005, at 6:42 PM, Daniel Berger wrote:

> Hi all,
>
> I recently tried to write an assertion like so:
>
> def test_array_infinity
>    array = [1,2,3]
>    assert_equal([1,2,3,"[...]"], array.push(array))
> end
>
> But, it appears that "[...]" is not a literal string.  However, I  
> can't
> just remove the quotes, because then I get a syntax error.
>
> How do I test this case?

I don't think you can do it so easily:

irb(main):001:0> expected = [1, 2, 3]
=> [1, 2, 3]
irb(main):002:0> expected << expected
=> [1, 2, 3, [...]]
irb(main):003:0> array = [1,2,3]
=> [1, 2, 3]
irb(main):004:0> array.push array
=> [1, 2, 3, [...]]
irb(main):005:0> array == expected
SystemStackError: stack level too deep
         from (irb):5:in `=='
         from (irb):5
         from :0

Try:

irb(main):007:0> array[0] == expected[0]
=> true
irb(main):008:0> array[1] == expected[1]
=> true
irb(main):009:0> array[2] == expected[2]
=> true
irb(main):011:0> array[3] == array
=> true

-- 
Eric Hodel - drbrain@segment7.net - http://segment7.net
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