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require File.dirname(__FILE__) + '/fluent_forwardable' module OrderSetup def new_forwardable_class klass = Class.new klass.class_eval { extend Forwardable } klass end def setup_order(klass) @order = klass.new @order.stub!(:shipping_address).and_return(@address=mock("address")) end end context "delegating readers" do include OrderSetup setup do klass = new_forwardable_class klass.class_eval { delegate_reader(:city).to(:shipping_address) } setup_order(klass) end specify "should delegate the reader to the receiver" do @address.should_receive(:city).once @order.city end specify "should not delegate writers" do @address.should_not_receive(:city=) lambda { @order.city = "New York" }.should raise_error(NoMethodError) end end context "delegate writers" do include OrderSetup setup do klass = new_forwardable_class klass.class_eval { delegate_writer(:city).to(:shipping_address) } setup_order(klass) end specify "should delegate the writer to the receiver" do @address.should_receive(:city=).once.with("New York") @order.city = "New York" end specify "should not delegate readers" do @address.should_not_receive(:city) lambda { @order.city }.should raise_error(NoMethodError) end end context "delegating accessors" do include OrderSetup setup do klass = new_forwardable_class klass.class_eval { delegate_accessor(:city).to(:shipping_address) } setup_order(klass) end specify "should delegate readers" do @address.should_receive(:city).once @order.city end specify "should delegate writers" do @address.should_receive(:city=).once.with("New York") @order.city = "New York" end end context "delegating to a method with a different name" do include OrderSetup setup do klass = new_forwardable_class klass.class_eval { delegate_reader(:city).as(:hometown).to(:shipping_address) } setup_order(klass) end specify "should use the specified name as the new method name" do @address.should_receive(:city).once @order.hometown end end context "delegating with a prefix" do include OrderSetup setup do klass = new_forwardable_class klass.class_eval { delegate_accessor(:city).with_prefix(:shipping).to(:shipping_address) } setup_order(klass) end specify "should use the prefix for any readers" do @address.should_receive(:city).once @order.shipping_city end specify "should use the prefix for any writers" do @address.should_receive(:city=).once.with("New York") @order.shipping_city = "New York" end end

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