output.txt

$ rspec -b -I. search_spec.rb                                                                                                                                                                                                                                        [16:15:14]

An error occurred in an around(:each) hook
  RuntimeError: can't modify frozen Class
  occurred at /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.12.0/lib/rspec/mocks/method_double.rb:152:in `remove_method'

F

Failures:

  1) Search#boats return Array
     Failure/Error: search.boats.should be_a(Array)
     RuntimeError:
       can't modify frozen Array
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.12.0/lib/rspec/mocks/proxy.rb:118:in `record_message_received'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-mocks-2.12.0/lib/rspec/mocks/test_double.rb:69:in `method_missing'
     # ./search.rb:9:in `block in boats'
     # ./search.rb:8:in `tap'
     # ./search.rb:8:in `boats'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/adamantium-0.0.3/lib/adamantium/module_methods.rb:80:in `call'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/adamantium-0.0.3/lib/adamantium/module_methods.rb:80:in `block (2 levels) in define_memoize_method'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/adamantium-0.0.3/lib/adamantium/module_methods.rb:79:in `fetch'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/adamantium-0.0.3/lib/adamantium/module_methods.rb:79:in `block in define_memoize_method'
     # ./search_spec.rb:11:in `block (2 levels) in <top (required)>'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example.rb:114:in `instance_eval'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example.rb:114:in `block in run'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example.rb:254:in `with_around_each_hooks'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example.rb:111:in `run'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example_group.rb:388:in `block in run_examples'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example_group.rb:384:in `map'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example_group.rb:384:in `run_examples'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/example_group.rb:369:in `run'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/command_line.rb:28:in `block (2 levels) in run'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/command_line.rb:28:in `map'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/command_line.rb:28:in `block in run'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/reporter.rb:34:in `report'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/command_line.rb:25:in `run'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/runner.rb:69:in `run'
     # /Users/cyrilmougel/.rbenv/versions/1.9.3-p194/lib/ruby/gems/1.9.1/gems/rspec-core-2.12.0/lib/rspec/core/runner.rb:8:in `block in autorun'

Finished in 0.0036 seconds
1 example, 1 failure

Failed examples:

rspec ./search_spec.rb:7 # Search#boats return Array

search.rb

require 'adamantium'

class Search

  include Adamantium

  def boats
    [].tap do |_boats|
      request.boats.each do |boat|
        _boats << Sedna::Boat.new(boat)
      end
    end
  end
  memoize :boats

  def request
    SearchRequest.new
  end
  memoize :request
end

search_spec.rb

require 'search'
class SearchRequest
end

module IceNine
  class Freezer
    class Spec < NoFreeze
    end
  end
end

describe Search, '#boats' do
  let(:search) { Search.new }
  it 'return Array' do
      SearchRequest.should_receive(:new).and_return(
        double(:search_request, :boats => [{}])
      )
      search.boats.should be_a(Array)
    end
end

Solution + Refactoring into simpler code:

def boats
  request.boats.map do |attributes|
     boats << Sedna::Boat.new(attributes)
  end
end
memoize  :boats, :freezer => :flat