commit d2eec9f94a43f53eb46fe1bec0ae681b5d874806
Author: Javan Makhmali <javan@javan.us>
Date:   Sun Feb 15 19:24:10 2009 -0800

    Initial commit.

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..835b14c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.DS_Store
+pkg
+doc
+Manifest
\ No newline at end of file
diff --git a/CHANGELOG.rdoc b/CHANGELOG.rdoc
new file mode 100644
index 0000000..62c88d7
--- /dev/null
+++ b/CHANGELOG.rdoc
@@ -0,0 +1,3 @@
+== 0.1.0 / February 15th, 2008
+
+* Initial release
\ No newline at end of file
diff --git a/README.rdoc b/README.rdoc
new file mode 100644
index 0000000..c8493f7
--- /dev/null
+++ b/README.rdoc
@@ -0,0 +1,79 @@
+= Whenever
+
+Whenever is a ruby gem that provides a ruby syntax for defining cron jobs. It was designed to work well with Rails applications, but can be used independently as well.
+
+== Installation
+
+To install Whenever in a Rails (2.1 or greater) application:
+  
+in your "config/environment.rb" file:
+
+  Rails::Initializer.run do |config|
+    config.gem 'javan-whenever', :lib => 'whenever', :source => 'http://gems.github.com'
+  end
+  
+To install this gem (and all other missing gem dependencies), run rake gems:install (use sudo if necessary).
+
+In older versions of Rails:
+
+$ gem sources -a http://gems.github.com
+$ gem install whenever
+
+in your "config/environment.rb" file:
+
+  Rails::Initializer.run do |config|
+    ...
+  end
+
+  require "whenever"
+  
+== Getting started
+
+$ cd /my/rails/app
+$ wheneverize .
+
+This will create an initial "config/schedule.rb" file you.
+
+== Example schedule.rb file
+
+  set :runner_path, '/var/www/apps/my_app' # Whenever will try to use your RAILS_ROOT if this isn't set
+  set :runner_environment, :production # Whenever defaults to production so only set this if you want to use a different environment.
+  set :cron_log, '/path/to/my/cronlog.log' # Where to log (this should NOT be your Rails log)
+
+
+  every 2.hours do
+    runner "MyModel.some_process" # runners are the script/runners you know and love
+    command "/usr/local/bin/my_great_command" # commands are any unix command
+  end
+
+  every 1.day, :at => '4:30 am' do # If not :at option is set these jobs will run at midnight
+    runner "DB.Backup", :cron_log => false # You can specify false for no logging or a string a different log file to override logging.
+  end
+
+  every :hour do # Many shortcuts available: :hour, :day, :month, :year, :reboot
+    runner "SomeModel.ladeda"
+  end
+
+  every :sunday do # Use any day of the week or :weekend, :weekday 
+    runner "Task.do_something_great"
+  end
+  
+== Cron output
+
+$ cd /my/rails/app
+$ whenever
+
+And you'll see your schedule.rb converted to cron sytax
+
+== Capistrano integration
+
+Use the "whenever:write_cron" task to automatically write your crontab file with each deploy.
+
+in your "config/deploy.rb" file do something like:
+
+  after "deploy:symlink", "whenever:write_cron"
+  
+THIS WILL COMPLETELY OVERWRITE ANY EXISTING CRONTAB ENTRIES!
+------------------------------------------------------------
+
+Better documentation on the way!
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..50ca4c2
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,14 @@
+require 'rubygems'
+require 'rake'
+require 'echoe'
+require 'lib/base'
+
+Echoe.new('whenever', Whenever::VERSION) do |p|
+  p.description    = "Provides (clean) ruby syntax for defining (messy) cron jobs and running them Whenever."
+  p.url            = "http://github.com/javan/whenever"
+  p.author         = "Javan Makhmali"
+  p.email          = "javan@javan.us"
+  p.dependencies   = ["chronic", "activesupport"]
+  p.ignore_pattern = ["tmp/*", "script/*"]
+  p.development_dependencies = []
+end
\ No newline at end of file
diff --git a/bin/whenever b/bin/whenever
new file mode 100644
index 0000000..4e8b733
--- /dev/null
+++ b/bin/whenever
@@ -0,0 +1,15 @@
+#!/usr/bin/env ruby
+
+require 'rake'
+require 'optparse'
+require 'whenever'
+
+task = "whenever:output_cron"
+ 
+OptionParser.new do |opts|
+  opts.banner = "Usage: whenever [options]"
+  opts.on('-c', '--write-crontab') { task = "whenever:write_cron" }
+  opts.on('-v', '--version') { puts "Whenever v#{Whenever::VERSION}"; exit }
+end.parse!
+
+Rake::Task[task].invoke
\ No newline at end of file
diff --git a/bin/wheneverize b/bin/wheneverize
new file mode 100644
index 0000000..50dbda2
--- /dev/null
+++ b/bin/wheneverize
@@ -0,0 +1,67 @@
+#!/usr/bin/env ruby
+
+# This file is based heavily on Capistrano's `capify` command
+
+require 'optparse'
+
+OptionParser.new do |opts|
+  opts.banner = "Usage: #{File.basename($0)} [path]"
+
+  begin
+    opts.parse!(ARGV)
+  rescue OptionParser::ParseError => e
+    warn e.message
+    puts opts
+    exit 1
+  end
+end
+
+if ARGV.empty?
+  abort "Please specify the directory to wheneverize, e.g. `#{File.basename($0)} .'"
+elsif !File.exists?(ARGV.first)
+  abort "`#{ARGV.first}' does not exist."
+elsif !File.directory?(ARGV.first)
+  abort "`#{ARGV.first}' is not a directory."
+elsif ARGV.length > 1
+  abort "Too many arguments; please specify only the directory to wheneverize."
+end
+
+
+content = <<-FILE
+# Use this file to easily define all of your cron jobs.
+#
+# It's helpful, but not entirely necessary to understand cron before proceeding.
+# http://en.wikipedia.org/wiki/Cron
+
+# Example:
+#
+# set :cron_log, "/path/to/my/cron_log.log"
+#
+# every 2.hours do
+#   command "/usr/bin/some_great_command"
+#   runner "MyModel.some_method"
+# end
+#
+# every 4.days do
+#   runner "AnotherModel.prune_old_records"
+# end
+
+# Learn more: http://github.com/javan/whenever
+FILE
+
+file = 'config/schedule.rb'
+base = ARGV.shift
+
+file = File.join(base, file)
+if File.exists?(file)
+  warn "[skip] `#{file}' already exists"
+elsif File.exists?(file.downcase)
+  warn "[skip] `#{file.downcase}' exists, which could conflict with `#{file}'"
+elsif !File.exists?(File.dirname(file))
+  warn "[skip] directory `#{File.dirname(file)}' does not exist"
+else
+  puts "[add] writing `#{file}'"
+  File.open(file, "w") { |f| f.write(content) }
+end
+
+puts "[done] wheneverized!"
diff --git a/lib/base.rb b/lib/base.rb
new file mode 100644
index 0000000..de58448
--- /dev/null
+++ b/lib/base.rb
@@ -0,0 +1,12 @@
+require 'job_list'
+require 'job_types/default'
+require 'job_types/runner'
+require 'outputs/cron'
+
+module Whenever
+  VERSION = '0.1.0'
+  
+  def self.cron(options)
+    Whenever::JobList.new(options).generate_cron_output
+  end
+end
\ No newline at end of file
diff --git a/lib/job_list.rb b/lib/job_list.rb
new file mode 100644
index 0000000..d634de1
--- /dev/null
+++ b/lib/job_list.rb
@@ -0,0 +1,84 @@
+module Whenever
+  class JobList
+  
+    def initialize(options)
+      @jobs = Hash.new
+      @env  = Hash.new
+      
+      config = case options
+        when String then options
+        when Hash
+          if options[:string]
+            options[:string]
+          elsif options[:file]
+            File.read(options[:file])
+          end
+      end
+
+      eval(config)
+    end
+    
+    def set(variable, value)
+      instance_variable_set("@#{variable}".to_sym, value)
+      self.class.send(:attr_reader, variable.to_sym)
+    end
+    
+    def env(variable, value)
+      @env[variable.to_s] = value
+    end
+  
+    def every(frequency, options = {})
+      @current_time_scope = frequency
+      @options = options
+      yield
+    end
+    
+    def command(task, options = {})
+      options[:cron_log] ||= @cron_log unless options[:cron_log] === false
+      options[:class]    ||= Whenever::Job::Default
+      @jobs[@current_time_scope] ||= []
+      @jobs[@current_time_scope] << options[:class].new(@options.merge(:task => task).merge(options))
+    end
+    
+    def runner(task, options = {})
+      options.reverse_merge!(:environment => @runner_environment, :path => @runner_path)
+      options[:class] = Whenever::Job::Runner
+      command(task, options)
+    end
+  
+    def generate_cron_output
+      [environment_variables, cron_jobs].compact.join
+    end
+    
+  private
+  
+    def environment_variables
+      return if @env.empty?
+      
+      output = []
+      @env.each do |key, val|
+        output << "#{key}=#{val}\n"
+      end
+      output << "\n"
+      
+      output.join
+    end
+    
+    def cron_jobs
+      return if @jobs.empty?
+      
+      output = []
+      @jobs.each do |time, jobs|
+        jobs.each do |job|
+          cron = Whenever::Output::Cron.output(time, job)
+          cron << " >> #{job.cron_log} 2>&1" if job.cron_log 
+          cron << "\n\n"
+          output << cron
+        end
+      end
+      
+      output.join
+    end
+    
+  end
+end
\ No newline at end of file
diff --git a/lib/job_types/default.rb b/lib/job_types/default.rb
new file mode 100644
index 0000000..b787d93
--- /dev/null
+++ b/lib/job_types/default.rb
@@ -0,0 +1,17 @@
+module Whenever
+  module Job
+    class Default
+      attr_accessor :task, :at, :cron_log
+    
+      def initialize(options = {})
+        @task     = options[:task]
+        @at       = options[:at]
+        @cron_log = options[:cron_log]
+      end
+    
+      def output
+        task
+      end
+    end
+  end
+end
\ No newline at end of file
diff --git a/lib/job_types/runner.rb b/lib/job_types/runner.rb
new file mode 100644
index 0000000..8d6049d
--- /dev/null
+++ b/lib/job_types/runner.rb
@@ -0,0 +1,30 @@
+module Whenever
+  module Job
+    class Runner < Whenever::Job::Default
+      
+      def initialize(options = {})
+        super(options)
+        
+        @environment = options[:environment] || :production
+        
+        if [Whenever::Job::Runner.rails_root, options[:path]].all?(&:blank?)
+          raise ArgumentError, "no cron_path available for runner to use"
+        else
+          @path = options[:path] || Whenever::Job::Runner.rails_root
+        end
+      end
+      
+      def self.rails_root
+        if defined?(RAILS_ROOT)
+          RAILS_ROOT 
+        elsif defined?(::RAILS_ROOT)
+          ::RAILS_ROOT
+        end
+      end
+
+      def output
+        %Q(#{File.join(@path, 'script', 'runner')} -e #{@environment} "#{task}")
+      end
+    end
+  end
+end
diff --git a/lib/outputs/cron.rb b/lib/outputs/cron.rb
new file mode 100644
index 0000000..f1ad2af
--- /dev/null
+++ b/lib/outputs/cron.rb
@@ -0,0 +1,104 @@
+module Whenever
+  module Output
+    
+    class Cron
+      
+      attr_accessor :time, :task
+      
+      def initialize(time = nil, task = nil, at = nil)
+        @time = time
+        @task = task
+        @at   = at.is_a?(String) ? (Chronic.parse(at) || 0) : (at || 0)
+      end
+      
+      def self.output(time, job)
+        out = new(time, job.output, job.at)
+        "#{out.time_in_cron_syntax} #{out.task}"
+      end
+      
+      def time_in_cron_syntax
+        case @time
+          when Symbol then parse_symbol
+          when String then parse_as_string
+          else parse_time
+        end
+      end
+      
+    protected
+    
+      def parse_symbol
+        case @time
+          when :reboot          then '@reboot'
+          when :year, :yearly   then '@annually'
+          when :day, :daily     then '@daily'
+          when :midnight        then '@midnight'
+          when :month, :monthly then '@monthly'
+          when :week, :weekly   then '@weekly'
+          when :hour, :hourly   then '@hourly'
+          else parse_as_string
+        end
+      end
+      
+      def parse_time
+        timing = Array.new(5, '*')
+        case @time
+          when 0.seconds...1.minute
+            raise ArgumentError, "Time must be in minutes or higher"
+          when 1.minute...1.hour
+            minute_frequency = @time / 60
+            timing[0] = comma_separated_timing(minute_frequency, 59)
+          when 1.hour...1.day
+            hour_frequency = (@time / 60 / 60).round
+            timing[0] = @at.is_a?(Time) ? @at.min : @at  
+            timing[1] = comma_separated_timing(hour_frequency, 23)
+          when 1.day...1.month
+            day_frequency = (@time / 24 / 60 / 60).round
+            timing[0] = @at.is_a?(Time) ? @at.min  : 0
+            timing[1] = @at.is_a?(Time) ? @at.hour : @at
+            timing[2] = comma_separated_timing(day_frequency, 31, 1)
+          when 1.month..12.months
+            month_frequency = (@time / 30  / 24 / 60 / 60).round
+            timing[0] = @at.is_a?(Time) ? @at.min  : 0
+            timing[1] = @at.is_a?(Time) ? @at.hour : 0
+            timing[2] = @at.is_a?(Time) ? @at.day  : (@at.zero? ? 1 : @at)
+            timing[3] = comma_separated_timing(month_frequency, 12, 1)
+          else
+            return parse_as_string
+        end
+        timing.join(' ')
+      end
+      
+      def parse_as_string
+        return unless @time
+        string = @time.to_s
+        
+        return "0 0 * * mon-fri" if string.downcase.index('weekday')
+        return "0 0 * * sat,sun" if string.downcase.index('weekend')
+        
+        %w(sun mon tue wed thu fri sat).each do |day|
+          return "0 0 * * #{day}" if string.downcase.index(day)
+        end
+        
+        raise ArgumentError, "Couldn't parse: #{@time}"
+      end
+      
+      def comma_separated_timing(frequency, max, start = 0)
+        return start     if frequency.blank? || frequency.zero?
+        return '*'       if frequency == 1
+        return frequency if frequency > (max * 0.5).ceil
+        
+        original_start = start
+        
+        start += frequency unless (max + 1).modulo(frequency).zero? || start > 0
+        output = (start..max).step(frequency).to_a
+        
+        max_occurances = (max.to_f  / (frequency.to_f)).round
+        max_occurances += 1 if original_start.zero?
+        
+        output[0, max_occurances].join(',')
+      end
+
+    end
+    
+  end
+end
\ No newline at end of file
diff --git a/lib/tasks/whenever.rake b/lib/tasks/whenever.rake
new file mode 100644
index 0000000..67c9266
--- /dev/null
+++ b/lib/tasks/whenever.rake
@@ -0,0 +1,21 @@
+namespace :whenever do
+
+  desc "outputs cron"
+  task :output_cron do
+    puts Whenever.cron(:file => "config/schedule.rb")
+  end
+  
+  desc "writes cron"
+  task :write_cron do
+    require 'tempfile'
+    cron_output = Whenever.cron(:file => "config/schedule.rb")
+    
+    tmp_cron_file = Tempfile.new('whenever_tmp_cron').path
+    File.open(tmp_cron_file, File::WRONLY | File::APPEND) do |file|
+      file << cron_output
+    end
+    sh "crontab #{tmp_cron_file}"
+    puts "[write] crontab file updated"
+  end
+
+end
\ No newline at end of file
diff --git a/lib/whenever.rb b/lib/whenever.rb
new file mode 100644
index 0000000..fd24b29
--- /dev/null
+++ b/lib/whenever.rb
@@ -0,0 +1,24 @@
+unless defined?(Whenever)
+  $:.unshift(File.dirname(__FILE__))
+   
+  # Hoping to load Rails' Rakefile
+  begin
+    load 'Rakefile'
+  rescue LoadError => e
+    nil
+  end
+  
+  # Load Whenever's rake tasks
+  begin
+    Dir[File.join(File.dirname(__FILE__), 'tasks', '*.rake')].each { |rake| load rake }
+  rescue LoadError => e
+    nil
+  end
+  
+end
+
+
+require 'activesupport'
+require 'chronic'
+
+require 'base'
diff --git a/test/cron_test.rb b/test/cron_test.rb
new file mode 100644
index 0000000..e8e3a33
--- /dev/null
+++ b/test/cron_test.rb
@@ -0,0 +1,187 @@
+require 'test_helper'
+
+class CronTest < Test::Unit::TestCase
+  
+  context "When parsing time in minutes" do
+    should "raise if less than 1 minute" do
+      assert_raises ArgumentError do
+        parse_time(59.seconds)
+      end
+      
+      assert_raises ArgumentError do
+        parse_time(0.minutes)
+      end
+    end
+    
+    # For santity, do some tests on straight String
+    should "parse correctly" do
+      assert_equal '* * * * *', parse_time(1.minute)
+      assert_equal '0,5,10,15,20,25,30,35,40,45,50,55 * * * *', parse_time(5.minutes)
+      assert_equal '7,14,21,28,35,42,49,56 * * * *', parse_time(7.minutes)
+      assert_equal '0,30 * * * *', parse_time(30.minutes)
+      assert_equal '32 * * * *', parse_time(32.minutes)
+      assert_not_equal '60 * * * *', parse_time(60.minutes) # 60 minutes bumps up into the hour range
+    end
+    
+    # Test all minutes
+    (2..59).each do |num|
+      should "parse correctly for #{num} minutes" do
+        start = 0
+        start += num unless 60.modulo(num).zero?
+        minutes = (start..59).step(num).to_a
+        
+        assert_equal "#{minutes.join(',')} * * * *", parse_time(num.minutes)
+      end
+    end
+  end
+  
+  context "When parsing time in hours" do
+    should "parse correctly" do
+      assert_equal '0 * * * *', parse_time(1.hour)
+      assert_equal '0 0,2,4,6,8,10,12,14,16,18,20,22 * * *', parse_time(2.hours)
+      assert_equal '0 0,3,6,9,12,15,18,21 * * *', parse_time(3.hours)
+      assert_equal '0 5,10,15,20 * * *', parse_time(5.hours)
+      assert_equal '0 17 * * *', parse_time(17.hours)
+      assert_not_equal '0 24 * * *', parse_time(24.hours) # 24 hours bumps up into the day range
+    end
+    
+    (2..23).each do |num|
+      should "parse correctly for #{num} hours" do
+        start = 0
+        start += num unless 24.modulo(num).zero?
+        hours = (start..23).step(num).to_a
+        
+        assert_equal "0 #{hours.join(',')} * * *", parse_time(num.hours)
+      end
+    end
+    
+    should "parse correctly when given an 'at' with minutes as an Integer" do
+      assert_minutes_equals "1",  1
+      assert_minutes_equals "14", 14
+      assert_minutes_equals "27", 27
+      assert_minutes_equals "55", 55
+    end
+    
+    should "parse correctly when given an 'at' with minutes as a Time" do
+      # Basically just testing that Chronic parses some times and we get the minutes out of it
+      assert_minutes_equals "1",  '3:01am'
+      assert_minutes_equals "1",  'January 21 2:01 PM'
+      assert_minutes_equals "0",  'midnight'
+      assert_minutes_equals "59", '13:59'
+    end
+  end
+  
+  context "When parsing time in days (of month)" do
+    should "parse correctly" do
+      assert_equal '0 0 * * *', parse_time(1.days)
+      assert_equal '0 0 1,3,5,7,9,11,13,15,17,19,21,23,25,27,29,31 * *', parse_time(2.days)
+      assert_equal '0 0 1,5,9,13,17,21,25,29 * *', parse_time(4.days)
+      assert_equal '0 0 1,8,15,22 * *', parse_time(7.days)
+      assert_equal '0 0 1,17 * *', parse_time(16.days)
+      assert_equal '0 0 17 * *', parse_time(17.days)
+      assert_equal '0 0 29 * *', parse_time(29.days)
+      assert_not_equal '0 0 30 * *', parse_time(30.days) # 30 days bumps into the month range
+    end
+    
+    should "parse correctly when given an 'at' with hours, minutes as a Time" do
+      # first param is an array with [hours, minutes]
+      assert_hours_and_minutes_equals %w(3 45),  '3:45am'
+      assert_hours_and_minutes_equals %w(20 1),  '8:01pm'
+      assert_hours_and_minutes_equals %w(0 0),   'midnight'
+      assert_hours_and_minutes_equals %w(1 23),  '1:23 AM'
+      assert_hours_and_minutes_equals %w(23 59), 'March 21 11:59 pM'
+    end
+    
+    should "parse correctly when given an 'at' with hours as an Integer" do
+      # first param is an array with [hours, minutes]
+      assert_hours_and_minutes_equals %w(1 0),  1
+      assert_hours_and_minutes_equals %w(3 0),  3
+      assert_hours_and_minutes_equals %w(15 0), 15
+      assert_hours_and_minutes_equals %w(19 0), 19
+      assert_hours_and_minutes_equals %w(23 0), 23
+    end
+  end
+  
+  context "When parsing time in months" do
+    should "parse correctly" do
+      assert_equal '0 0 1 * *', parse_time(1.month)
+      assert_equal '0 0 1 1,3,5,7,9,11 *', parse_time(2.months)
+      assert_equal '0 0 1 1,4,7,10 *', parse_time(3.months)
+      assert_equal '0 0 1 1,5,9 *', parse_time(4.months)
+      assert_equal '0 0 1 1,6 *', parse_time(5.months)
+      assert_equal '0 0 1 7 *', parse_time(7.months)
+      assert_equal '0 0 1 8 *', parse_time(8.months)
+      assert_equal '0 0 1 9 *', parse_time(9.months)
+      assert_equal '0 0 1 10 *', parse_time(10.months)
+      assert_equal '0 0 1 11 *', parse_time(11.months)
+      assert_equal '0 0 1 12 *', parse_time(12.months)
+    end
+    
+    should "parse correctly when given an 'at' with days, hours, minutes as a Time" do
+      # first param is an array with [days, hours, minutes]
+      assert_days_and_hours_and_minutes_equals %w(1 3 45),  'January 1st 3:45am'
+      assert_days_and_hours_and_minutes_equals %w(11 23 0), 'Feb 11 11PM'
+      assert_days_and_hours_and_minutes_equals %w(22 1 1), 'march 22nd at 1:01 am'
+      assert_days_and_hours_and_minutes_equals %w(23 0 0), 'march 22nd at midnight' # looks like midnight means the next day
+    end
+    
+    should "parse correctly when given an 'at' with days as an Integer" do
+      # first param is an array with [days, hours, minutes]
+      assert_days_and_hours_and_minutes_equals %w(1 0 0),  1
+      assert_days_and_hours_and_minutes_equals %w(15 0 0), 15
+      assert_days_and_hours_and_minutes_equals %w(29 0 0), 29
+    end
+  end
+  
+  context "When parsing time in days (of week)" do
+    should "parse days of the week correctly" do
+      {
+        'sun' => %w(sun Sunday SUNDAY SUN),
+        'mon' => %w(mon Monday MONDAY MON),
+        'tue' => %w(tue tues Tuesday TUESDAY TUE),
+        'wed' => %w(wed Wednesday WEDNESDAY WED),
+        'thu' => %w(thu thurs thur Thursday THURSDAY THU),
+        'fri' => %w(fri Friday FRIDAY FRI),
+        'sat' => %w(sat Saturday SATURDAY SAT) 
+      }.each do |day, day_tests|
+        day_tests.each do |day_test|
+          assert_equal "0 0 * * #{day}", parse_time(day_test)
+        end
+      end
+    end
+    
+    should "parse weekday correctly" do
+      assert_equal '0 0 * * mon-fri', parse_time('weekday')
+      assert_equal '0 0 * * mon-fri', parse_time('Weekdays')
+    end
+    
+    should "parse weekend correctly" do
+      assert_equal '0 0 * * sat,sun', parse_time('weekend')
+      assert_equal '0 0 * * sat,sun', parse_time('Weekends')
+    end
+  end
+  
+private
+
+  def assert_days_and_hours_and_minutes_equals(expected, time)
+    cron = parse_time(2.months, 'some task', time)
+    minutes, hours, days, *garbage = cron.split(' ')
+    assert_equal expected, [days, hours, minutes]
+  end
+
+  def assert_hours_and_minutes_equals(expected, time)
+    cron = parse_time(2.days, 'some task', time)
+    minutes, hours, *garbage = cron.split(' ')
+    assert_equal expected, [hours, minutes]
+  end
+
+  def assert_minutes_equals(expected, time)
+    cron = parse_time(2.hours, 'some task', time)
+    assert_equal expected, cron.split(' ')[0]
+  end
+
+  def parse_time(time = nil, task = nil, at = nil)
+    Whenever::Output::Cron.new(time, task, at).time_in_cron_syntax
+  end
+  
+end
\ No newline at end of file
diff --git a/test/output_command_test.rb b/test/output_command_test.rb
new file mode 100644
index 0000000..110dd3f
--- /dev/null
+++ b/test/output_command_test.rb
@@ -0,0 +1,70 @@
+require 'test_helper'
+
+class OutputCommandTest < Test::Unit::TestCase
+  
+  context "A plain command" do
+    setup do
+      @output = load_whenever_output \
+      <<-file
+        every 2.hours do
+          command "blahblah"
+        end
+      file
+    end
+    
+    should "output the command" do
+      assert_match /^.+ .+ .+ .+ blahblah$/, @output
+    end
+  end
+  
+  context "A command when the cron_log is set" do
+    setup do
+      @output = load_whenever_output \
+      <<-file
+        set :cron_log, 'logfile.log'
+        every 2.hours do
+          command "blahblah"
+        end
+      file
+    end
+    
+    should "output the command with the log syntax appended" do
+      assert_match /^.+ .+ .+ .+ blahblah >> logfile.log 2>&1$/, @output
+    end
+  end
+  
+  context "A command when the cron_log is set and the comand overrides it" do
+    setup do
+      @output = load_whenever_output \
+      <<-file
+        set :cron_log, 'logfile.log'
+        every 2.hours do
+          command "blahblah", :cron_log => 'otherlog.log'
+        end
+      file
+    end
+    
+    should "output the command with the log syntax appended" do
+      assert_no_match /.+ .+ .+ .+ blahblah >> logfile.log 2>&1/, @output
+      assert_match /^.+ .+ .+ .+ blahblah >> otherlog.log 2>&1$/, @output
+    end
+  end
+  
+  context "A command when the cron_log is set and the comand rejects it" do
+    setup do
+      @output = load_whenever_output \
+      <<-file
+        set :cron_log, 'logfile.log'
+        every 2.hours do
+          command "blahblah", :cron_log => false
+        end
+      file
+    end
+
+    should "output the command without the log syntax appended" do
+      assert_no_match /.+ .+ .+ .+ blahblah >> logfile.log 2>&1/, @output
+      assert_match /^.+ .+ .+ .+ blahblah$/, @output
+    end
+  end
+  
+end
\ No newline at end of file
diff --git a/test/output_env_test.rb b/test/output_env_test.rb
new file mode 100644
index 0000000..9d2ec5d
--- /dev/null
+++ b/test/output_env_test.rb
@@ -0,0 +1,23 @@
+require 'test_helper'
+
+class OutputEnvTest < Test::Unit::TestCase
+
+  context "The output from Whenever with environment variables set" do
+    setup do
+      @output = load_whenever_output \
+      <<-file
+        env :MYVAR, 'blah'
+        env 'MAILTO', "someone@example.com"
+      file
+    end
+
+    should "output MYVAR environment variable" do
+      assert_match "MYVAR=blah", @output
+    end
+  
+    should "output MAILTO environment variable" do
+      assert_match "MAILTO=someone@example.com", @output
+    end
+  end
+
+end
\ No newline at end of file
diff --git a/test/output_runner_test.rb b/test/output_runner_test.rb
new file mode 100644
index 0000000..5622362
--- /dev/null
+++ b/test/output_runner_test.rb
@@ -0,0 +1,75 @@
+require 'test_helper'
+
+class OutputRunnerTest < Test::Unit::TestCase
+  
+  context "A runner with runner_path set" do
+    setup do
+      @output = load_whenever_output \
+      <<-file
+        set :runner_path, '/my/path'
+        every 2.hours do
+          runner "blahblah"
+        end
+      file
+    end
+    
+    should "output the runner using that path" do
+      assert_match two_hours + ' /my/path/script/runner -e production "blahblah"', @output
+    end
+  end
+  
+  context "A runner with no runner_path set and RAILS_ROOT defined" do
+    setup do
+      Whenever::Job::Runner.stubs(:rails_root).returns('/my/path')
+      
+      @output = load_whenever_output \
+      <<-file
+        every 2.hours do
+          runner "blahblah"
+        end
+      file
+    end
+    
+    should "output the runner using that path" do
+      assert_match two_hours + ' /my/path/script/runner -e production "blahblah"', @output
+    end
+  end
+  
+  context "A runner with runner_path set AND RAILS_ROOT defined" do
+    setup do
+      Whenever::Job::Runner.stubs(:rails_root).returns('/my/path')
+      
+      @output = load_whenever_output \
+      <<-file
+        set :runner_path, '/my/path'
+        every 2.hours do
+          runner "blahblah"
+        end
+      file
+    end
+    
+    should "use the runner_path" do
+      assert_match two_hours + ' /my/path/script/runner -e production "blahblah"', @output
+      assert_no_match /\/rails\/path/, @output
+    end
+  end
+  
+  context "A runner with no runner_path set and no RAILS_ROOT defined" do
+    setup do
+      Whenever::Job::Runner.stubs(:rails_root).returns(nil)
+      
+      @input = <<-file
+        every 2.hours do
+          runner "blahblah"
+        end
+      file
+    end
+    
+    should "raise an exception" do
+      assert_raises ArgumentError do
+        load_whenever_output(@input)
+      end
+    end
+  end
+  
+end
\ No newline at end of file
diff --git a/test/test_helper.rb b/test/test_helper.rb
new file mode 100644
index 0000000..ead54f2
--- /dev/null
+++ b/test/test_helper.rb
@@ -0,0 +1,35 @@
+require 'rubygems'
+require 'test/unit'
+
+begin
+  require 'shoulda'
+rescue LoadError
+  warn 'To test Whenever you need the shoulda gem:'
+  warn '$ sudo gem install thoughtbot-shoulda'
+  exit(1)
+end
+
+begin
+  require 'mocha'
+rescue LoadError
+  warn 'To test Whenever you need the mocha gem:'
+  warn '$ sudo gem install mocha'
+  exit(1)
+end
+
+require 'whenever'
+
+module TestExtensions
+  
+  def load_whenever_output(input) 
+    Whenever.cron(input)
+  end
+  
+  def two_hours
+    "0 0,2,4,6,8,10,12,14,16,18,20,22 * * *"
+  end
+end
+
+class Test::Unit::TestCase
+  include TestExtensions
+end