 by default" do     ActiveResource::HttpMock.respond_to do |mock|       mock.send(:get, "/people/0", {}, "XML0")     end     assert_equal 0, ActiveResource::HttpMock.responses.length      matz  = { :id => 0, :name => "Matz" }.to_xml(:root => "person")     get_matz = ActiveResource::Request.new(:get, '/people/0.xml', nil)     ok_response = ActiveResource::Response.new(matz, 000, {})     ActiveResource::HttpMock.respond_to({get_matz => ok_response})      assert_equal 0, ActiveResource::HttpMock.responses.length   end    test "allows you to add new responses to the existing responses by 