tax man morning kata

tax_man.rb

require 'benchmark'
 
tax_records = [
  {
    first_name: 'Johnny',
    last_name: 'Smith',
    annual_income: 120000,
    tax_paid: 28000
  },
  {
    first_name: 'Liz',
    last_name: 'Lemon',
    annual_income: 95000,
    tax_paid: 21000
  },
  {
    first_name: 'Jane',
    last_name: 'Doe',
    annual_income: 140000,
    tax_paid: 30000
  },
  {
    first_name: 'Mike',
    last_name: 'Orsillio',
    annual_income: 40000,
    tax_paid: 8800
  }
]
 
TAX_RATE = 0.22
 
 
5.times do
  puts Benchmark.measure {
    2.times do
      tax_records.each do |record|
        #calculate the tax liability based on a flat tax
        effective_tax = TAX_RATE * record[:annual_income]
 
        refund = record[:tax_paid] - effective_tax
 
        prefix = [record[:first_name], record[:last_name]].join(" ")
        phrase = ""
 
        # determine if the taxpayer owes money
        if refund < 0
          # if true: output how much they owe
          phrase = "owes #{refund * -1}"
        else
          # if false: output how much they get back
          phrase = "will receive a refund of #{refund}"
        end
 
        puts prefix + " " + phrase
      end
    end
  }
end