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Speed up integration tests in Rails 5 app

Rails 5 recompiles templates on every request in test env. Fix will be released only in 5.0.2.

Add this lines to test helper to get the performance now (I've got x2 improvement):

class << ActionView::LookupContext::DetailsKey
 def clear

freiden

Setting up and installing rbenv, ruby-build, rubies, rbenv-gemset, and bundler

This guide enables you to install (ruby-build) and use (rbenv) multiple versions of ruby, isolate project gems (gemsets and/or bundler), and automatically use appropriate combinations of rubies and gems.

TL;DR Demo

# Ensure system is in ship-shape.

aptitude install git zsh libssl-dev zlib1g-dev libreadline-dev libyaml-dev

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Install ree with the following commands: CFLAGS="-O2 -fno-tree-dce -fno-optimize-sibling-calls" rbenv install ree-1.8.7-2012.02

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# cap deploy deploy:db_schema_load
namespace :deploy do

  desc "Load the initial schema - it will WIPE your database, use with care"
  task :db_schema_load, :roles => :db, :only => { :primary => true } do
    puts <<-EOF

************************** WARNING ***************************
If you type [yes], rake db:schema:load will WIPE your database
any other input will cancel the operation.

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task :ask_production_confirmation do
  set(:confirmed) do
    puts <<-WARN

    ========================================================================

      WARNING: You're about to perform actions on production server(s)
      Please confirm that all your intentions are kind and friendly

    ========================================================================

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# SSL self signed localhost for rails start to finish, no red warnings. 

# 1) Create your private key (any password will do, we remove it below)

$ openssl genrsa -des3 -out server.orig.key 2048


# 2) Remove the password

$ openssl rsa -in server.orig.key -out server.key

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# 
# = Capistrano database.yml task
#
# Provides a couple of tasks for creating the database.yml 
# configuration file dynamically when deploy:setup is run.
#
# Category::    Capistrano
# Package::     Database
# Author::      Simone Carletti <weppos@weppos.net>
# Copyright::   2007-2010 The Authors

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class Foo < ActiveRecord::Base

  ALLOWED_HTML_ELEMENTS = %w[
    a b br blockquote code em h2 h3 hr i li ol p pre s strong sub sup u ul
  ]
  ALLOWED_EMPTY_HTML_ELEMENTS = %w[br hr]

  before_validation :sanitize_html

  private

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require 'restclient'

# RestClient logs using << which isn't supported by the Rails logger,
# so wrap it up with a little proxy object.
RestClient.log =
  Object.new.tap do |proxy|
    def proxy.<<(message)
      Rails.logger.info message
    end
  end

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#!/bin/bash
# Actual filename: bootstrap/rvm.erb
# vim: set ft=sh

# This script automatically bootstraps the system with everything it needs to run chef-solo.
# Note: This should only do the absolute minimum necessary to get chef-solo (and your recipes)
# working. All else should be done via chef recipes.

#===================================================================================================
# Config