p.133 complexed outstanding(before refactoring)

chapter6/Extract_Method.rb

@@ -16,9 +16,16 @@ def order_entry(amount)
     @orders << Extract_Method_Order.new(amount)
   end
 
-  def print_owing
+  def print_owing(previous_amount)
+    outstanding = previous_amount * 1.2
+
     print_banner
-    outstanding = calculate_outstanding
+
+    # 勘定を計算(calculate outstanding)
+    @orders.each do |order|
+      outstanding += order.amount
+    end
+
     print_details outstanding
   end
 
@@ -35,7 +42,4 @@ def print_details(outstanding)
     puts "amount: #{outstanding}"
   end
 
-  def calculate_outstanding
-    @orders.inject(0.0){|result, order| result + order.amount }
-  end
 end

chapter6/TC_Extract_Method.rb

@@ -25,12 +25,12 @@ def setup
   must "test1" do
     temp=Tempfile::new("foobar")
     $stdout=temp
-    @obj.print_owing
+    @obj.print_owing(10)
     $stdout=STDOUT
     temp.close
     temp.open
     result= temp.read
-    expectation = "*************************\n***** Customer Owes *****\n*************************\nname: kono\namount: 60.0\n"
+    expectation = "*************************\n***** Customer Owes *****\n*************************\nname: kono\namount: 72.0\n"
     temp.close
     assert_equal(result, expectation)
   end