class PotOfCoffee::Brewer
Attributes
quantity[R]
strength[R]
units[R]
Public Class Methods
new(quantity: 12, strength: :medium, units: Units::Imperial)
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# File lib/pot_of_coffee/brewer.rb, line 7 def initialize(quantity: 12, strength: :medium, units: Units::Imperial) fail Errors::NegativeNumber unless quantity.positive? fail Errors::WrongStrength unless units.table.keys.include?(strength) @quantity = quantity @strength = strength @units = units end
Public Instance Methods
grounds()
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# File lib/pot_of_coffee/brewer.rb, line 16 def grounds (quantity * units.table.fetch(strength)).round(2) end
instructions()
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# File lib/pot_of_coffee/brewer.rb, line 20 def instructions <<~INSTRUCTIONS Cups desired: #{quantity} Brew strength: #{strength} Grounds needed: #{grounds} #{units.abbreviation} INSTRUCTIONS end