The document outlines a presentation on Test Driven Development (TDD) using Chef, led by Simone Soldateschi, a senior DevOps engineer. It discusses the process of writing tests, deploying a Node.js web application, and utilizing tools like Berkshelf, Test Kitchen, and RSpec for testing. Topics include integration tests, code examples for building recipes, and the workflow for deploying applications using TDD principles.

1. TDD WITH CHEF
FUN WITH FLAGS TESTING
Created by /Simone Soldateschi @soldasimo

2. ( )
WHO AM I?
Simone Soldateschi @soldasimo
- Snr DevOps Engineer based in Sydney
- Leading DevOps Engineering Team at
- 15 years of experience as:
- SysAdmin
- SoftwareEng
- SysEng
- Been DevOps'in for the last 5-ish years
Rackspace AU

3. WHAT IS TDD?
Test Driven Development
Meaning... write tests
see them fail
write code to pass tests
...still waiting...
SOUNDS WEIRD? ;)

4. WHY?
no PowerPoint-like presentation
using the mouse is boring
and I don't have one
coding is fun
IT'S LIVE-DEMO, WITH TDD!

5. HOW?
Use TDD
Write Chef Cookbook
Deploy node.js web-app
Leverage Vagrant, Docker, or Cloud Server
Run this very presentation
Kinda recursive, isn't it? ;)

6. WHAT DO YOU USE?

7. "THE USUAL" DEPLOY WORKFLOW
start coding
compile it
deploy artifacts
looks good?
wait ...still waiting... any issues?
REACTIVE APPROACH

8. CHEF OVERVIEW

12. IN SHORT
code
test it
OK? push it
KO? fix it!

13. ?

15. and many others
Berkshelf
Test Kitchen
Foodcritic

16. Default Ruby interpreter
$ which ruby
/usr/bin/ruby

17. Save you from headaches ( )Chef Docs
$ chef exec which ruby
/opt/chefdk/embedded/bin/ruby

18. Permanent settings
$ chef shell-init bash
export PATH="/opt/chefdk/bin:/Users/siso/.chefdk/gem/ruby/2.1.0/bin:/opt/chef
export GEM_ROOT="/opt/chefdk/embedded/lib/ruby/gems/2.1.0"
export GEM_HOME="/Users/siso/.chefdk/gem/ruby/2.1.0"
export GEM_PATH="/Users/siso/.chefdk/gem/ruby/2.1.0:/opt/chefdk/embedded/lib/

19. PROJECT SPECS
GOAL
Deploy this Node.js presentation
TASKS
Node.js should be installed
Checkout Git repository
Let the Internet access the web-server
Web-server should not run as root

24. LET'S COOK

25. Manually
$ cd cookbooks
$ mkdir -p foo/attributes foo/recipes
$ cat > foo/metadata.rb << EOF
> name 'foo'
> maintainer 'YOUR_COMPANY_NAME'
> maintainer_email 'YOUR_EMAIL'
> license 'All rights reserved'
> description 'Installs/Configures foo'
> long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
> version '0.1.0'
> EOF

26. ...are you kidding me?!

27. knife
$ knife cookbook create foo
** Creating cookbook foo in /Users/siso/.chef/cookbooks
** Creating README for cookbook: foo
** Creating CHANGELOG for cookbook: foo
** Creating metadata for cookbook: foo
$ ls /Users/siso/.chef/cookbooks/foo/
CHANGELOG.md README.md attributes definitions files
libraries metadata.rb providers recipes resources
templates

28. Berkshelf
$ berks cookbook cheftdd

29. Get off on the right foot!

30. Berkshelf
$ berks cookbook cheftdd
...
create cheftdd/attributes
...
create cheftdd/recipes
...
create cheftdd/metadata.rb
...
create cheftdd/Berksfile
...
create .kitchen.yml
...
create test/integration/default
...
You must run `bundle install' to fetch any new gems.
create cheftdd/Vagrantfile

31. Berkshelf (full output)
$ berks cookbook cheftdd
create cheftdd/files/default
create cheftdd/templates/default
create cheftdd/attributes
create cheftdd/libraries
create cheftdd/providers
create cheftdd/recipes
create cheftdd/resources
create cheftdd/recipes/default.rb
create cheftdd/metadata.rb
create cheftdd/LICENSE
create cheftdd/README.md
create cheftdd/CHANGELOG.md
create cheftdd/Berksfile
create cheftdd/Thorfile
create cheftdd/chefignore
create cheftdd/.gitignore

32. GRAB RUBY GEMS

33. Bundler
$ bundle
Fetching gem metadata from https://rubygems.org/.......
Fetching additional metadata from https://rubygems.org/..
Resolving dependencies...
Using rake 10.4.2
Installing CFPropertyList 2.3.1
...
Using vagrant-wrapper 2.0.2
Your bundle is complete!
Use `bundle show [gemname]` to see where a bundled gem is installed.

34. RUBOCOP
A Ruby static code analyzer, based on the community Ruby
style guide.

35. $ rubocop
warning: parser/current is loading parser/ruby21, which recognizes
warning: 2.1.5-compliant syntax, but you are running 2.1.4.
Inspecting 2 files
..
2 files inspected, no offenses detected
All good!

36. is a lint tool for your Opscode Chef cookbooks.
FOODCRITIC
Foodcritic

37. is a simple ruby build program with capabilities similar
to make.
RAKE
Rake

38. CHECK STYLE
Use Rake
to run andRubocop Foodcritic
in the right environment
with Bundler

39. $ bundle exec rake style
RACK005: Cookbook metadata must have maintainer='Rackspace' maintainer_email=
RACK005: Cookbook metadata must have maintainer='Rackspace' maintainer_email=
RACK008: Files expected by Support must exist: Berksfile.lock:0
RACK009: Berksfile.lock must not be in .gitignore: .gitignore:11
warning: parser/current is loading parser/ruby21, which recognizes
warning: 2.1.5-compliant syntax, but you are running 2.1.4.
Running RuboCop...
Inspecting 2 files
..
2 files inspected, no offenses detected
Need to fix something

40. Change Maintainer and email, and try again:
$ bundle exec rake style
RACK008: Files expected by Support must exist: Berksfile.lock:0
RACK009: Berksfile.lock must not be in .gitignore: .gitignore:11
warning: parser/current is loading parser/ruby21, which recognizes
warning: 2.1.5-compliant syntax, but you are running 2.1.4.
Running RuboCop...
Inspecting 2 files
..
2 files inspected, no offenses detected
It's better

41. Generate Berkshelf.lock:
$ berks install
Resolving cookbook dependencies...
Fetching 'cheftdd' from source at .
Fetching cookbook index from https://supermarket.chef.io...
Using cheftdd (0.1.0) from source at .
and let Git handle it

42. Try again:
$ bundle exec rake style
warning: parser/current is loading parser/ruby21, which recognizes
warning: 2.1.5-compliant syntax, but you are running 2.1.4.
Running RuboCop...
Inspecting 2 files
..
2 files inspected, no offenses detected
OK!

44. write RSpec tests
check servers are configured correctly

45. RSpec
Behaviour Driven Development for Ruby
Making TDD Productive and Fun

46. Default recipe should
update the package-manager database
upgrade packages

47. Which is
# apt-get update
# apt-get upgrade

48. Then write a test
$ cat test/unit/spec/default_spec.rb
...
it 'executes apt-get update' do
expect(chef_run).to run_execute('apt-get update')
end
...

49. it fails
$ bundle exec rake spec
/opt/chefdk/embedded/bin/ruby -I/Users/siso/.chefdk/gem/ruby/2.1.0/gems/rspec
F
Failures:
1) cheftdd::default executes apt-get update
Failure/Error: expect(chef_run).to run_execute('apt-get update')
expected "execute[apt-get update]" with action :run to be in Chef run.
# ./test/unit/spec/default_spec.rb:23:in `block (2 levels) in <top (requ
Finished in 0.15203 seconds (files took 2.39 seconds to load)
1 example, 1 failure

50. Write code to pass the test
#
# Cookbook Name:: cheftdd
# Recipe:: default
#
# Copyright (C) 2015 YOUR_NAME
#
# All rights reserved - Do Not Redistribute
#
execute "apt-get update/upgrade" do
command "apt-get update"
action :run
end

51. Run the test again
$ bundle exec rake spec
/opt/chefdk/embedded/bin/ruby -I/Users/siso/.chefdk/gem/ruby/2.1.0/gems/rspec
.
Finished in 0.16453 seconds (files took 2.52 seconds to load)
1 example, 0 failures
ChefSpec Coverage report generated...
Total Resources: 1
Touched Resources: 1
Touch Coverage: 100.0%
You are awesome and so is your test coverage! Have a fantastic day!
it's OK!

52. 'NODEJS' RECIPE
Install Node.js
+
deploy web-app

54. Deploy :reveal.js
install and
clone reveal.js
resolve dependencies
serve the slide-deck
Node.js Grunt
$ git clone https://github.com/hakimel/reveal.js.git
$ npm install
$ grunt serve --port 80

55. FILE-NAMING SCHEMA
recipes/nodejs.rb
⥥
test/unit/spec/nodejs_spec.rb

56. test/unit/spec/nodejs_spec.rb
it 'include nodejs recipe' do
expect(chef_run).to include_recipe('nodejs')
end
# Follow instructions to install reveal.js on https://github.com/hakimel/reve
it 'install grunt-cli' do
expect(chef_run).to run_execute('npm install -g grunt-cli')
end
it 'install git' do
expect(chef_run).to install_apt_package('git')
end
it 'clone reveal.js GitHub repository' do
expect(chef_run).to run_execute('git clone https://github.com/hakimel/revea
end

57. recipes/nodejs.rbtests fail:
$ bundle exec rake spec
/opt/chefdk/embedded/bin/ruby -I/Users/siso/.chefdk/gem/ruby/2.1.0/gems/rspec
.FFFFF
Failures:
1) cheftdd::nodejs include nodejs recipe
Failure/Error: expect(chef_run).to include_recipe('nodejs')
expected ["cheftdd::nodejs"] to include "nodejs::default"
# ./test/unit/spec/nodejs_spec.rb:23:in `block (2 levels) in <top (requi
2) cheftdd::nodejs install grunt-cli
Failure/Error: expect(chef_run).to run_execute('npm install -g grunt-cli
expected "execute[npm install -g grunt-cli]" with action :run to be in

58. Install Node.js
#
# Cookbook Name:: cheftdd-demo
# Recipe:: nodejs
#
# Copyright (C) 2015 YOUR_NAME
#
# All rights reserved - Do Not Redistribute
#
#
# Install reveal.js - https://github.com/hakimel/reveal.js/
#
# install nodejs, from package by default
include_recipe 'nodejs'
execute 'install grunt-cli' do

59. Install reveal.js
package 'git' do
action :install
end
execute 'clone reveal.js GitHub repository' do
command 'git clone https://github.com/hakimel/reveal.js.git'
action :run
cwd '/opt'
not_if { File.exist?('/opt/reveal.js') }
end

60. Resolve dependencies
execute 'install npm packages' do
command 'npm install'
action :run
cwd '/opt/reveal.js'
end
execute 'start serving node.js app' do
command 'grunt serve &'
action :run
cwd '/opt/reveal.js'
end

61. Test nodejsrecipe:
$ bundle exec rake spec
/opt/chefdk/embedded/bin/ruby -I/Users/siso/.chefdk/gem/ruby/2.1.0/gems/rspec
......
Finished in 1.06 seconds (files took 2.51 seconds to load)
6 examples, 0 failures
Great, it's OK!

62. INTEGRATION TESTING

63. TEST KITCHEN

65. - run Integration Tests
- awesome documentation
have a read!

66. .KITCHEN.YML
---
driver:
name: vagrant
customize:
memory: 1024

67. provisioner:
name: chef_zero
nodes_path: "test/integration/nodes"
require_chef_omnibus: 11.16.4
client_rb:
environment: _default
attributes:
testkitchen: true
openssh:
server:
password_authentication: 'yes'
permit_root_login: 'yes'
authorization:
sudo:
users: ['vagrant']
passwordless: true

68. platforms:
- name: ubuntu-14.04

69. suites:
- name: default
run_list:
attributes:
- name: nodejs
run_list:
- recipe[cheftdd::default]
- recipe[cheftdd::nodejs]

70. NODE LIFECYCLE
Current status of nodes:
$ kitchen list
Instance Driver Provisioner Last Action
nodejs-ubuntu-1404 Rackspace ChefZero Not Created

71. Create node
# kitchen create

72. Node status
$ kitchen list
Instance Driver Provisioner Last Action
nodejs-ubuntu-1404 Rackspace ChefZero Created

73. Converge node
# kitchen converge

74. CONVERGE NODE
run chef-client on node
apply recipes

75. Node status
$ kitchen list
Instance Driver Provisioner Last Action
nodejs-ubuntu-1404 Rackspace ChefZero Converged

76. INTEGRATION TESTS
FILE-NAMING SCHEMA
test/integration/SUITE/rspec/WHATEVER_spec.rb
⥥
KitchenCI SUITE: nodejs
⥥
test/integration/nodejs/rspec/nodejs_spec.rb

77. RECIPE
# install nodejs, from package by default
include_recipe 'nodejs'
TEST
describe command('nodejs --version') do
its(:stdout) { should match(/v0.10.37/) }
end

78. RECIPE
package 'git' do
action :install
end
TEST
describe package('git') do
it { should be_installed }
end

79. RECIPE
execute 'clone reveal.js GitHub repository' do
command 'git clone https://github.com/hakimel/reveal.js.git'
action :run
cwd '/opt'
not_if { File.exist?('/opt/reveal.js') }
end
TEST
describe file('/opt/reveal.js') do
it { should be_directory }
end

80. RECIPE
execute 'start serving node.js app' do
command 'grunt serve --port 80 &'
action :run
cwd '/opt/reveal.js'
end
TEST
describe port('80') do
it { should be_listening }
end

81. RECIPE
add_iptables_rule('INPUT', '-p tcp -m state --state NEW --dport 80 -
s 0.0.0.0/0 -j ACCEPT', 50, 'Allow the Internet access the web-serve
r')
TEST
describe iptables do
it { should have_rule('-A INPUT -p tcp -m state --state NEW -m tcp
--dport 80 -m comment --comment "Allow the Internet access the web-
server" -j ACCEPT').with_chain('INPUT') }
end

82. KITCHENCI - INTEGRATION TESTS
Eventually, run integration tests
# kitchen verify

83. $ kitchen verify
-----> Starting Kitchen (v1.3.1)
-----> Setting up <nodejs-ubuntu-1404>...
-----> Setting up Busser
...
-----> Verifying <nodejs-ubuntu-1404>...
...
-----> Running rspec test suite
...
Finished in 0.09244 seconds
4 examples, 0 failures
Finished verifying <nodejs-ubuntu-1404> (0m2.94s).
-----> Kitchen is finished. (0m11.06s)

85. Full output:
$ kitchen verify
-----> Starting Kitchen (v1.3.1)
-----> Setting up <nodejs-ubuntu-1404>...
-----> Setting up Busser
Creating BUSSER_ROOT in /tmp/busser
Creating busser binstub
Plugin rspec already installed
Finished setting up <nodejs-ubuntu-1404> (0m3.09s).
-----> Verifying <nodejs-ubuntu-1404>...
Removing /tmp/busser/suites/rspec
Uploading /tmp/busser/suites/rspec/Gemfile (mode=0644)
Uploading /tmp/busser/suites/rspec/nodejs_spec.rb (mode=0644)
Uploading /tmp/busser/suites/rspec/spec_helper.rb (mode=0644)
-----> Running rspec test suite
run PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/
Don't run Bundler as root. Bundler can ask for sudo if it is needed, a
installing your bundle as root will break this application for all non

86. ALL IN ONE GO
$ kitchen test
«ha ah»

87. $ kitchen test
⥥
$ kitchen destroy
⥥
$ kitchen create
⥥
$ kitchen converge
⥥
$ kitchen verify
⥥
$ kitchen destroy

88. RECAP

89. write unit-tests
⥥
implement features

90. run unit-tests
⥥
$ bundle exec rake style
⥥
$ bundle exec rake spec
KO? fix it!
OK? move on

91. write integration-tests
⥥
run integration-tests

92. $ kitchen create
⥥
$ kitchen converge
⥥
$ kitchen verify
⥥
KO? fix it!
⥥
OK? done

93. LINKS
- click links on this slide-deck
-
-
-
-
-
-
-
An Overview of Chef
Install Chef DK
TDD with Chef, by Nathen Harvey
reveal.js
TDD with Chef, by Nathen Harvey
DevOps Reactions on Tumblr
The Phoenix Project

95. Source Quantity
The Big Bang Theory 1
Breaking Bad 1
How I Met Your Mother 2
Matrix 1