From: Gavin Sinclair <gsinclair@...>
Date: 2004-11-13T10:59:47+09:00
Subject: Re: assert

On Saturday, November 13, 2004, 12:46:23 PM, Gavin wrote:

> On Saturday, November 13, 2004, 7:28:26 AM, Florian wrote:

>> itsme213 wrote:

>>> I could not find a standard "assert" in Ruby. Is there one?

>> There's one in the dev-utils package. It will automatically set a 
>> breakpoint if the application is run in debug mode and therefore give
>> you an irb shell where you can find out why your assert failed.

> It's not there at the moment (I don't think).  And the OP probably
> wants an exception raised, not an IRB session :)

While writing that message, I realised why a breakpoint-inducing
assert would be handy.  Let's call it assert_bp, since the bare name
'assert' so strongly implies "raise an error if expression is false".

Code:

  x = 5
  y = 6
  assert_bp "x + y = 100"

Console:

  Assert failed: x + y = 100 (foo/bar.rb:51)
  irb> _

Now, can anyone suggest a better name than 'assert_bp'?

Gavin