Sylvia

What is Sylvia?

Sylvia is meant to "grease" your Ruby tests via cleaning up memory leaks by releasing instance variables and defers garbage collection or GC.

How do I use Sylvia?

Sylvia is a Ruby gem. In order to get started, you'll need to setup the gem (instructions below). You'll optionally want to setup and configure your Ruby workflows so that you can track/debug the status of identified tests through your triage process, and obviously to see if your tests are running faster. Usage instructiosn are below.

export RUBY_HEAP_MIN_SLOTS=1000000
export RUBY_HEAP_SLOTS_INCREMENT=1000000
export RUBY_HEAP_SLOTS_GROWTH_FACTOR=1
export RUBY_GC_MALLOC_LIMIT=1000000000
export RUBY_HEAP_FREE_MIN=500000

Installing

From the command line, update your box

sudo apt-get update
sudo apt-get -y install git libxslt-dev libxml2-dev build-essential bison openssl zlib1g libxslt1.1 libssl-dev libxslt1-dev libxml2 libffi-dev libxslt-dev libpq-dev autoconf libc6-dev libreadline6-dev zlib1g-dev libtool libsqlite3-dev libcurl3 libmagickcore-dev ruby-build libmagickwand-dev imagemagick bundler

Once you've updated your box and made sure you have all the dependicies needed, make sure you have Ruby/Rbenv installed, follow each command step by step

cd ~
git clone git://github.com/sstephenson/rbenv.git .rbenv
echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
exec $SHELL

git clone git://github.com/sstephenson/ruby-build.git ~/.rbenv/plugins/ruby-build
echo 'export PATH="$HOME/.rbenv/shims:$HOME/.rbenv/plugins/ruby-build/bin:$PATH"' >> ~/.bashrc
exec $SHELL

rbenv install 2.0.0-p481
rbenv global 2.0.0-p481
ruby -v

Now we are going to install Ruby on Rails, for the sake of time I'm going to put the flag "--no-ri --no-rdoc", from the command line, which skips installing the documentation, for this, I'm installing Rails 5

gem install bundler --no-ri --no-rdoc
rbenv rehash
gem install rails -v 5.0.0

Now we are going install the last dependicies needed in order to run Sylvia properly

sudo apt-get install redis-server
gem install sidekiq
rbenv rehash

Open another terminal or optionally an IDE, then navigate to your 'gemfile', and add the following line to your gemfile, in this instance the version really doesn't matter

gem "sylvia"

Once you have added the Sylvia gem, you can run the following

git clone https://github.com/Montana/sylvia.git
cd sylvia
bundle install
rake db:create
rake db:schema:load

That should install all the dependencies, and now Sylvia is installed, and a working gem.

Secrets

First you should generate secrets for the Rails Application and Devise

rake secret

Run this command twice. Put one secret on line 7 of config/initializers/secret_token.rb. Put the other on line 7 of config/initializers/devise.rb Now onto defining methods to the Proxy.

Defining Methods to Proxy

class Sylvia
  module Alligator
    def reverse(input)
      input.reverse
    end
  end
end

Your cucumber.rb file should look something like this

config.before(:each) do
  Sylvia.disable
end

config.after(:each) do
  Sylvia.collect

Syncing

In order to allow Sylvia to automatically run tests and send email notifications, you may want to setup cron jobs using the appropriate rake tasks

rake sync_all

This take will run all the tests and import any new errors or results. It will also generate screenshots of each result, if the integration with Sketchy is configured.

Cucumber

Make sure you have these lines in your setup file

require 'sylvia/cucumber'

Or if you want, you can optionally do, it's really up to you

Before do
  Sylvia.disable
end

After do
  Sylvia.collect.all
end

Using Foreman

You can test using Foreman, or even Travis. Sylvia should start on localhost:5000 if you're using Foreman, run

foreman start

You should see something similar to this

14:31:46 web.1  | started with pid 699

If you want Foreman to use Sylvia on a different port than 5000, insert '.foreman' file that says 'port: 3000' at the root of your app. Or alternatively, run

sylvia_rails --config-file config/sylvia.rb -p 3000

Using Docker

You can also configure Sylvia to run in Docker

Sylvia.new :host => '192.168.1.192', :port => 4243

Questions

Please email me at montana@getprowl.com if there's any questions. I encourage in helping/improving/forking/sharing, etc.