rspec users - Apr 2009 - [cucumber] Setting a constant in step definition

On Mon, Apr 27, 2009 at 7:00 AM, Andrew Premdas <apremdas at gmail.com>
wrote:
> Currently I have a very simple constants implementation being loaded as a
> Rails initialiser
>
> module MVOR
> ? module Postage
> ??? THRESHOLD = BigDecimal.new(''6.99'')
> ??? RATE = BigDecimal.new(''30.00'')
> ? end
> end
>
>
> My scenarios of my postage feature want to deal with two situations when
the
> THRESHOLD has been set to zero and to ''6.99''. The
question is how can I set
> the threshold in my step_definition. So I want to implement
>
> ? Given the postage threshold is 0.00
> ? Given the postage threshold is 6.99
>
>
> ?I''ve considered a number of ideas, but seem to keep on getting
into complex
> solutions for what I assume is something very simple.
If THRESHOLD can change, then it is not, by definition, a constant.
It''s just a global variable.

I''d change it to a method and then stub that method for a given
scenario (even though stubbing is a Cucumber no-no ;) ).

WDYT?

David
>
> TIA
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>

On 27 Apr 2009, at 19:08, Andrew Premdas wrote:
> Thankyou Aslak much appreciated
Bear in mind that this trick will change the value of the constant FOR  
ALL REMAINING SCENARIOS - not just the current one.

If that bothers you, have a read of this thread:
http://www.nabble.com/AfterCurrentScenario-block-td23100686.html
>
>
> Andrew
>
> 2009/4/27 aslak hellesoy <aslak.hellesoy at gmail.com>
>
> Good question. One answer is that it can change, it just needs a  
> code change and application restart.
>
> Basic business case is that someone will set the postage threshold  
> before the application is deployed. However they could choose any  
> value. So I want to test what happens when the application is setup  
> with different values e.g. zero because all postage is free and ?30  
> cos postage is free if you spend ?50 or more.
>
> Currently we do not want to do form based admin for this setting  
> (and similar ones) because such a change would be very infrequent,  
> so we are currently happy to redeploy to make the change.
>
> I would do something like this: http://gist.github.com/102586
>
>
>
> 2009/4/27 aslak hellesoy <aslak.hellesoy at gmail.com>
>
>
>
> On Mon, Apr 27, 2009 at 2:00 PM, Andrew Premdas <apremdas at
gmail.com>
> wrote:
> Currently I have a very simple constants implementation being loaded  
> as a Rails initialiser
>
> module MVOR
>   module Postage
>     THRESHOLD = BigDecimal.new(''6.99'')
>     RATE = BigDecimal.new(''30.00'')
>   end
> end
>
>
> My scenarios of my postage feature want to deal with two situations  
> when the THRESHOLD has been set to zero and to ''6.99''.
The question
> is how can I set the threshold in my step_definition. So I want to  
> implement
>
>   Given the postage threshold is 0.00
>   Given the postage threshold is 6.99
>
>
> Since it''s a constant - how can it possibly change? And therefore
-
> why are you testing it with different values?
>
>
>  I''ve considered a number of ideas, but seem to keep on getting
into
> complex solutions for what I assume is something very simple.
>
> TIA
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
Matt Wynne
http://blog.mattwynne.net
http://www.songkick.com

On 27 Apr 2009, at 22:48, aslak hellesoy wrote:
>
>
> On 27 Apr 2009, at 19:08, Andrew Premdas wrote:
>
> Thankyou Aslak much appreciated
>
> Bear in mind that this trick will change the value of the constant  
> FOR ALL REMAINING SCENARIOS - not just the current one.
>
> I think you missed the After block.
I stand corrected :)
> If that bothers you, have a read of this thread:
> http://www.nabble.com/AfterCurrentScenario-block-td23100686.html
>
>
>
>
> Andrew
>
> 2009/4/27 aslak hellesoy <aslak.hellesoy at gmail.com>
>
> Good question. One answer is that it can change, it just needs a  
> code change and application restart.
>
> Basic business case is that someone will set the postage threshold  
> before the application is deployed. However they could choose any  
> value. So I want to test what happens when the application is setup  
> with different values e.g. zero because all postage is free and ?30  
> cos postage is free if you spend ?50 or more.
>
> Currently we do not want to do form based admin for this setting  
> (and similar ones) because such a change would be very infrequent,  
> so we are currently happy to redeploy to make the change.
>
> I would do something like this: http://gist.github.com/102586
>
>
>
> 2009/4/27 aslak hellesoy <aslak.hellesoy at gmail.com>
>
>
>
> On Mon, Apr 27, 2009 at 2:00 PM, Andrew Premdas <apremdas at
gmail.com>
> wrote:
> Currently I have a very simple constants implementation being loaded  
> as a Rails initialiser
>
> module MVOR
>  module Postage
>    THRESHOLD = BigDecimal.new(''6.99'')
>    RATE = BigDecimal.new(''30.00'')
>  end
> end
>
>
> My scenarios of my postage feature want to deal with two situations  
> when the THRESHOLD has been set to zero and to ''6.99''.
The question
> is how can I set the threshold in my step_definition. So I want to  
> implement
>
>  Given the postage threshold is 0.00
>  Given the postage threshold is 6.99
>
>
> Since it''s a constant - how can it possibly change? And therefore
-
> why are you testing it with different values?
>
>
>  I''ve considered a number of ideas, but seem to keep on getting
into
> complex solutions for what I assume is something very simple.
>
> TIA
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
> Matt Wynne
> http://blog.mattwynne.net
> http://www.songkick.com
>
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
Matt Wynne
http://blog.mattwynne.net
http://www.songkick.com