Loading rails 2.3 / 3+ in your gem tests

In case you want to test your gem / plugin on multiple rails version:

require 'rails/version'

if Rails::VERSION::MAJOR > 2
  require 'rails'
else
  module Rails
    class FakeConfig
      def after_initialize
      end
    end
    @@configuration = FakeConfig.new
  end
  require 'initializer'
end

ActiveRecord slow_delete_all

Deletes taking to long, just take a break 🙂
(so replication can catch up/things get unblocked)

Only use save sql, there is no escapeing.

  class ActiveRecord::Base
    def self.slow_delete_all(condition)
      count = 0
      loop do
        result = ActiveRecord::Base.connection.send(:delete_sql, "delete from #{table_name} where #{condition} limit 10000")
        count += result
        break if result == 0
        sleep 1
      end
      count
    end
  end

Ruby: Kill all threads

In case you spam a lot of threads and dont know how to get rid of them…

Thread.list.each do |thread|
  thread.exit unless thread == Thread.current
end

assert_change and assert_no_change for Test::Unit + Minitest inspired by RSpec

Usage

@updated_at = lambda{ @model.updated_at.to_i }
assert_change(@updated_at) { @model.touch }
assert_no_change(@updated_at) { @model.reload }

Code

  def assert_change(what)
    old = what.call
    yield
    assert_not_equal old, what.call
  end

  def assert_no_change(what)
    old = what.call
    yield
    assert_equal old, what.call
  end

Solved: constant “Firefox” is an application which was downloaded from the internet….

Firefox always complains that its downloaded from the internet because the quarantine setting somehow got stuck…

Open the Terminal (e.g. Command+Space and type Terminal)

sudo xattr -d com.apple.quarantine /Applications/Firefox

Michael Grosser, the Blog

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