Class: CashRegister::DiscountItem

Inherits:

NormalItem

• Object
• NormalItem
• CashRegister::DiscountItem

Defined in:

lib/cash_register/discount_item.rb

Instance Attribute Summary

Attributes inherited from NormalItem

#count, #deal

Instance Method Summary

• #billing ⇒ Object
• #saving ⇒ Object
• #to_s ⇒ Object

Methods inherited from NormalItem

#initialize

Methods included from Helper

#format_price

Constructor Details

This class inherits a constructor from CashRegister::NormalItem

Instance Method Details

#billing ⇒ Object

# File 'lib/cash_register/discount_item.rb', line 9

def billing
 total = super
 total - saving
end

#saving ⇒ Object

# File 'lib/cash_register/discount_item.rb', line 5

def saving
  deal.price * count * 0.05
end

#to_s ⇒ Object

# File 'lib/cash_register/discount_item.rb', line 14

def to_s
  super + "，节省：#{format_price saving}(元)"
end