TDD Strings

TDDStrings.rb

# Add 2 to the number.
def add_two(number)
  if number.respond_to? :+
    if number.respond_to? :push
        number.push 2
    elsif number.is_a?(String)
      number.to_f + 2
    else
      number + 2
    end
    end
end
 
def test_add_two
    puts add_two(1)
    puts add_two(1.0)
    puts add_two(nil)
    puts add_two({})
    puts add_two([])
    puts add_two(false)
    puts add_two("")
end

test_add_two