Object#smoosh

smoosh.rb

# Fun stuff for training purposes
# Demonstrates:
#   Monkey-Patching
#   Polymorphism
#   Case statements
#   Type matching
#   Regular Expressions
#   Raising errors
#   Enumurable#map
#   Symbol to Proc
#   Recursion
#   Testing
#   Looping assertions
#   80's sitcom jingles

class Object
  def smoosh
    case self
    when String
      gsub(/[[:space:]]+/, '')
    when Symbol
      to_s.smoosh
    when Array
      map(&:smoosh).join
    when Hash
      map { |key, value| key.smoosh + value.smoosh }.smoosh
    else
      raise NotImplementedError
    end
  end
end

require 'minitest/autorun'
class TestSmoosh < Minitest::Test
  def test_smoosh_smooshes_all_the_things
    [
      ['Sunday, Monday, Happy Days!', 'Sunday,Monday,HappyDays!'],
      [['Tuesday', 'Wednesday', 'happy days'], 'TuesdayWednesdayhappydays'],
      [{ thursday: 'Friday', happy: 'days!' }, 'thursdayFridayhappydays!'],
      [{ saturday: { the: 'weekend comes', my: { cycle: 'hums' }, groovin: 'all week with you!' } }, 'saturdaytheweekendcomesmycyclehumsgroovinallweekwithyou!'],
    ].each do |input, expected_output|
      assert_equal expected_output, input.smoosh
    end
  end
end