mocking_blocks.rb

# I'm testing some code that translates HTTP query params from the front end
# into a query against a Solr via the Sunspot API.  What I want to be able to
# do is unit test the query translation step *without* having to have Solr running.

# So I thought about mocking it out, but none of the mocking frameworks seem to
# be able to provide a way of mocking out something passed as a block.

# I have some HTTP query that my code 'executes' against Solr.  It should be *exactly* equivalent
# to running the following query against Sunspot.

Sunspot.search(Scrape) do
   with(:domain).equal_to("some.domain.name.com")
end

# What I want to be able to do is somehow mock 'self' within the block so that I can
# test that with(:domain).equal_to("some.domain.name.com") is executed.

# So far I haven't figured out how to do it with a mocking framework.

# I want to be able to say something like this (verbose for clarity, mock framework is RR)

mock(Sunspot).search(Scrape).is_called_with_block_that_executes do |_self|
  _self.with(:domain).equal_to("some.domain.name.com")
end

# Any ideas?

# I realise I could hand code a mock Sunspot.search method, or perhaps 
# mock the internal Sunspot DSL class but that feels dirty. 

Did you come up with a solution for this?

I think I got the solution:

catcher = mock('Catcher', :binding => binding)
catcher.binding.should_receive(:keywords).with('bob')
SunspotSearchableModel.should_receive(:search).and_return(catcher.binding)

Hm. maybe not.

Hi there! I blogged about it (my one and only post...) http://freshtonic.tumblr.com/

On 9 December 2011 03:08, mmzoo < ***@***.*** > wrote: I think I got the solution: catcher = mock('Catcher', :binding => binding) catcher.binding.should_receive(:keywords).with('bob') SunspotSearchableModel.should_receive(:search).and_return(catcher.binding) --- Reply to this email directly or view it on GitHub: https://gist.github.com/320111

## James

Hah! Thanks, I just were about to use

class SunspotSearchTestModel
  def self.search(&block)
    instance_eval(&block)
  end
end
SunspotSearchTestModel.should_receive(:keywords).with('john')

But your solution is really nicer. Thanks a lot!