Refactoring: Refactorings/Inline Method

Method's content is just as clear (and as short) as its name. Useful before Replace Method with Method Object

Mechanics

1. Check that method is not polymorphic (overridden in subclass)

   Note: Don't inline if subclasses override the method; they cannot override a method that isn't there.

2. Find all calls to the method
3. Replace each call with the method body.
4. Test
5. Remove method definition

Example

Before

def get_rating
  more_than_five_late_deliveries ? 2 : 1
end

def more_than_five_late_deliveries
  @number_of_late_deliveries > 5
end

After

def get_rating
  @number_of_late_deliveries > 5 ? 2 : 1
end