So unit testing isn’t really in activesupport. Ruby comes with a typical xunit framework in the standard libs (Test::Unit in ruby 1.8.x, MiniTest in ruby 1.9), and the stuff in activesupport just adds some stuff to it. If you are using Test::Unit/MiniTest assert_raise(Exception) { whatever.merge } if you are using rspec (unfortunately poorly documented, but … Read more
To encode a file: require ‘base64’ Base64.encode64(File.open(“file_path”, “rb”).read) To produce the file from the encoded string: require ‘base64’ encoded_string = Base64.encode64(File.open(“file_path”, “rb”).read) File.open(file_name_to_create, “wb”) do |file| file.write(Base64.decode64(encoded_string)) end
Time#localtime will give you the time in the current time zone of the machine running the code: > moment = Time.now.utc => 2011-03-14 15:15:58 UTC > moment.localtime => 2011-03-14 08:15:58 -0700 Update: If you want to conver to specific time zones rather than your own timezone, you’re on the right track. However, instead of worrying … Read more
Since using Rails should handle this automatically I’m going to assume you’re trying to add Active Support to a non-Rails script. Read “How to Load Core Extensions”. Active Support’s methods got broken into smaller groups in Rails 3, so we don’t end up loading a lot of unneeded stuff with a simple require ‘activesupport’. Now … Read more
Rails extends Ruby with both mattr_accessor (Module accessor) and cattr_accessor (as well as _reader/_writer versions). As Ruby’s attr_accessor generates getter/setter methods for instances, cattr/mattr_accessor provide getter/setter methods at the class or module level. Thus: module Config mattr_accessor :hostname mattr_accessor :admin_email end is short for: module Config def self.hostname @hostname end def self.hostname=(hostname) @hostname = hostname … Read more
Use Time.now + 10.days or even 10.days.from_now Both definitely work. Are you sure you’re in Rails and not just Ruby? If you definitely are in Rails, where are you trying to run this from? Note that Active Support has to be loaded.
With the Date (and DateTime) classes you can do (end_date – start_date).to_i to get the number of days difference.