rspec users - Aug 2008 - Argument Constraints where the Argument is a Hash

Hi folks,

I have an object whose constructor I want to stub, specifying that it  
should be passed a hash containing an expected set of key / value pairs.

Note that the actual hash might contain more key / value pairs, but I  
don''t care, as long as my expected ones are there

I thought I might be able to write this:

           expected_params = {
             :page => "1",
             :city_id => city.id.to_s,
             :name => "thingy" }

	Venue::Query.should_receive(:new).with( include 
(expected_params) ).and_return(query)

... but it doesn''t seem to work.

What''s my best approach?

Thanks for your patience and support as I get up to speed with this  
stuff folks. You''re all very kind!

cheers,
Matt
----
http://blog.mattwynne.net
http://songkick.com

In case you wondered: The opinions expressed in this email are my own  
and do not necessarily reflect the views of any former, current or  
future employers of mine.

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Okay, I realised the with() is calling the == method on whatever you  
pass in, so I did this:

       module EquateAnyHashContainingAllMyElements
         def ==(other)

           self.keys.all? do |key|
             other.has_key?(key)
           end

         end
       end
	....

           expected_params = {
             :page => "1",
             :city_id => city.id.to_s,
             :name => name_filter }

           expected_params.extend(EquateAnyHashContainingAllMyElements)

           Venue::Query.should_receive(:new).with 
( expected_params ).and_return(query)


Thoughts? Is there a neater way to do this? Be as brutal as you  
like ... ;)

cheers,
Matt
----
http://blog.mattwynne.net
http://songkick.com

In case you wondered: The opinions expressed in this email are my own  
and do not necessarily reflect the views of any former, current or  
future employers of mine.

On 18 Aug 2008, at 17:10, Matt Wynne wrote:
> Hi folks,
>
> I have an object whose constructor I want to stub, specifying that  
> it should be passed a hash containing an expected set of key /  
> value pairs.
>
> Note that the actual hash might contain more key / value pairs, but  
> I don''t care, as long as my expected ones are there
>
> I thought I might be able to write this:
>
>           expected_params = {
>             :page => "1",
>             :city_id => city.id.to_s,
>             :name => "thingy" }
>
> 	Venue::Query.should_receive(:new).with( include 
> (expected_params) ).and_return(query)
>
> ... but it doesn''t seem to work.
>
> What''s my best approach?
>
> Thanks for your patience and support as I get up to speed with this  
> stuff folks. You''re all very kind!
>
> cheers,
> Matt
> ----
> http://blog.mattwynne.net
> http://songkick.com
>
> In case you wondered: The opinions expressed in this email are my  
> own and do not necessarily reflect the views of any former, current  
> or future employers of mine.
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
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On Aug 18, 2008, at 11:10 AM, Matt Wynne <matt at mattwynne.net> wrote:
> Hi folks,
>
> I have an object whose constructor I want to stub, specifying that  
> it should be passed a hash containing an expected set of key / value  
> pairs.
>
> Note that the actual hash might contain more key / value pairs, but  
> I don''t care, as long as my expected ones are there
>
> I thought I might be able to write this:
>
>           expected_params = {
>             :page => "1",
>             :city_id => city.id.to_s,
>             :name => "thingy" }
>
> 	 
> Venue: 
> :Query. 
> should_receive( 
> :new).with( include(expected_params) ).and_return(query)
Close ...

...with( hash_including(expected_params).and...

Cheers,
David
>
> ... but it doesn''t seem to work.
>
> What''s my best approach?
>
> Thanks for your patience and support as I get up to speed with this  
> stuff folks. You''re all very kind!
>
> cheers,
> Matt
> ----
> http://blog.mattwynne.net
> http://songkick.com
>
> In case you wondered: The opinions expressed in this email are my  
> own and do not necessarily reflect the views of any former, current  
> or future employers of mine.
>
> _______________________________________________
> rspec-users mailing list
> rspec-users at rubyforge.org
> http://rubyforge.org/mailman/listinfo/rspec-users
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