Error

error.rb

#FILE

module Amazon
  class Products
    def self.hello_world
      return "Hello World!"
    end

    def search(query)
      request = self.build_request(query)
      []
    end

    def build_request(query)
      request = Vacuum.new(:product_advertising)
      request.configure do |config|
        config.key    'AKIAJ5HO5KJC4OISP7WQ'
        config.secret 'QqaxJ09GZbMZPcETeDOOoSQrdm4llVIf3jg1q8'
        config.tag    'voicsear-20' 
      end

      request.build(:operation => "Item Search", 
                    :search_index => "All", 
                    :keywords => query.to_s)
      request
    end
  end
end

#TEST

require 'spec_helper'

describe "AmazonLibrary" do
  it "should be accessible" do
    Amazon::Products.hello_world.should == "Hello World!"
  end

  it "should build a request" do
    request = Amazon::Products.new.build_request("Hello")
    request.should be_an_instance_of Vacuum::Request::ProductAdvertsing
  end

  it "should return an array of products" do
    Amazon::Products.new.search("Bacon").should be_an_instance_of Array
  end

end

#ERROR

1) AmazonLibrary should build a request
     Failure/Error: request = Amazon::Products.new.build_request("Hello")
     ArgumentError:
       wrong number of arguments (1 for 0)
     # ./lib/amazon_products.rb:15:in `block in build_request'
     # ./lib/amazon_products.rb:14:in `build_request'
     # ./spec/libraries/amazon_products.rb:9:in `block (2 levels) in <top (required)>'

  2) AmazonLibrary should return an array of products
     Failure/Error: Amazon::Products.new.search("Bacon").should be_an_instance_of Array
     ArgumentError:
       wrong number of arguments (1 for 0)
     # ./lib/amazon_products.rb:15:in `block in build_request'
     # ./lib/amazon_products.rb:14:in `build_request'
     # ./lib/amazon_products.rb:8:in `search'
     # ./spec/libraries/amazon_products.rb:14:in `block (2 levels) in <top (required)>'

  3/3:         100% |==========================================| Time: 00:00:00

Finished in 0.00722 seconds
3 examples, 2 failures

Failed examples:

rspec ./spec/libraries/amazon_products.rb:8 # AmazonLibrary should build a request
rspec ./spec/libraries/amazon_products.rb:13 # AmazonLibrary should return an array of products