From: Robert Klemme <bob.news@...>
Date: 2005-12-07T01:07:34+09:00
Subject: Re: How can I find __LINE__ on the execution stack ?

Christer Nilsson wrote:
> bob.news wrote:
>
>> You can use caller[0] to get the info you want:
>>
>> irb(main):007:0> def test
>> irb(main):008:1>   p caller[0]
>> irb(main):009:1> end
>> => nil
>> irb(main):010:0> test
>> "(irb):10:in `irb_binding'"
>> => nil
>>
>> Kind regards
>>
>>     robert
>
> Thank you Robert!

You're welcome.

> def assert(expect, actual, *msg)
>   expect==actual ? print(".") : print("\nAssert failed:
> #{expect.inspect} <> #{actual.inspect} in line
> #{caller[0].split('\\').last} #{msg}\n")
> end

Btw, one way to make your assertion code maybe a bit more runtime savvy
would be to use blocks:

if do_test?
  def assert()
    raise AssertionError unless yield
  end
else
  def assert() end
end

assert { foo > 10 }

IIRC there is already an assert method that works exactly this way.

Kind regards

    robert