autospec.rb

#!/usr/bin/env ruby
# Run Rspec-rails automatically with FSevent (like alloy's kicker, but using ruby-fsevent)
# Setup:
# 1) sudo cp autospec.rb /usr/local/bin/autospec
# 2) sudo chmod +x /usr/local/bin/autospec
# 3) cd /to/your/rails
# 4) autospec

begin
  require 'fsevent'
rescue LoadError => boom
  abort("Install ruby-fsevent with: sudo gem install ruby-fsevent")
end

class SpecsChange < FSEvent
  def on_change(dir)
    paths = dir.to_s.split("/")
    name = paths[paths.size-1]
    system("rake spec:#{name}")
  end

  def start
    puts " ==> watching #{registered_directories.join(", ")}"
    super
  end
end

app = SpecsChange.new
app.latency = 0.2
app.watch_directories %w(spec/controllers spec/models spec/helpers spec/views)
app.start