###Type:

• Quiz

###Time Required:

• 30 minutes

###Prerequisites:

• Ruby
  • Objects/Classes
  • Initializer
  • Accessors
  • Multi-file projects ('require')

###Objectives:

• Split a ruby application into multiple files.

###Activity:

• We have a small grocery store that would like to keep track of all orders.

###Explanation

• You are going to create grocery orders
• Make git commits as you finish each phase, so you can see the history

###Specification: #####Object Specs:

• Product Type:

  • A product type should have an id.
  • A product type should have a name.
  • A product type should have a price.
  • A product type should have a description (optional).

• Order Item:

  • An order item should have a product type.
  • An order item should have a quantity of the product type ordered.
  • An order item should have a unit price (this may be different than the product price)

• Order

  • And order should have an order id
  • And order should have one or more order items.
  • And order should have a complete_xaction method that will log (see below)..

• Log:

  • A log entry should be created for each product type created.
  • A log entry should be create for each order. Logging the order including it's order items.
  • Each log entry should be shown on the command line for each order.

#####Phase 1

• Define classes, including a Log mixin.

#####Phase 2

• Calcuate the price of one order.
• Keep a running sum of all orders, (use Array#inject method?).

#####Extra

• Keep all the classes in the GA namespace.
• How could one use inheritence to improve the design of the product type?
• Log to the OSX 'say' command as well as to stdout.

###Post-mortem:

• What worked?