gistfile1.rb

# hotness = age_in_minutes / (votes**2.5)                                                                                                                      
def original_hotness(now, created_at, votes)                                                                                                                   
  age_in_minutes = (((created_at.to_f / 60).floor * 60) - ((now.to_f / 60).floor * 60)) / -60                                                                  
  age_in_minutes / (votes**2.5)                                                                                                                                
end                                                                                                                                                            
                                                                                                                                                               
def new_hotness(now, created_at, votes)                                                                                                                        
  age_in_minutes = (now - created_at) / 60                                                                                                                     
  age_in_minutes / (votes**2.5)                                                                                                                                
end                                                                                                                                                            
                                                                                                                                                               
require 'time'                                                                                                                                                 
require 'test/unit/assertions'                                                                                                                                 
include Test::Unit::Assertions                                                                                                                                 
                                                                                                                                                               
now = Time.now                                                                                                                                                 
created_at = Time.parse('2012-10-10 13:45:00')                                                                                                                 
                                                                                                                                                               
assert_equal original_hotness(now, created_at, 0)  , new_hotness(now, created_at, 0)                                                                           
assert_equal original_hotness(now, created_at, 1)  , new_hotness(now, created_at, 1)                                                                           
assert_equal original_hotness(now, created_at, 100), new_hotness(now, created_at, 100)                                                                         
puts 'pass!' 

not quite...