"How and why you should test" by Daniele Sluijters at Puppet Camp Amsterdam 2013.

1. Sunday, April 7, 13

2. testing!
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Sunday, April 7, 13

3. testing!
before production
not in production
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Sunday, April 7, 13

4. whoami
• Daniele Sluijters
• @daenney: irc, twitter, github, ...
• mail: daniele.sluijters@nedap.com
• XMPP / Jabber: ☝
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Sunday, April 7, 13

5. www.nedap.com
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Sunday, April 7, 13

6. consequences
exec
{
‘first-­‐run-­‐reboot’:
command
=>
‘touch
/tmp/first-­‐run
&&
reboot’,
creates
=>
‘/tmp/first-­‐run’,
}
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Sunday, April 7, 13

7. avoid latest
class
mysql
{
package
{
‘mysql-­‐server’:
ensure
=>
latest,
notify
=>
Service[‘mysql’],
}
}
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Sunday, April 7, 13

8. structure
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Sunday, April 7, 13

9. params
class
acme::params
{
case
$::osfamily
{
‘Debian’:
{
$founder
=
‘Marvin’
}
default:
{
fail(“No
can’t
do.”)
}
}
}
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Sunday, April 7, 13

10. params
class
acme::package
{
package
{
‘marvin’:
ensure
=>
$::acme::version,
}
...
}
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Sunday, April 7, 13

11. configurable
class
acme(
$version
=
‘1.6’,
$enable
=
true,
)
inherits
acme::params
{
...
}
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Sunday, April 7, 13

12. users are crazy
class
acme(
$version
=
‘1.6’,
$enable
=
true,
){
validate_string($version)
validate_bool($enable)
}
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Sunday, April 7, 13

13. data sources
• Don’t couple modules to data
• Pass in data through params
• Use a profile to configure the module
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Sunday, April 7, 13

14. profile
class
profile::acme
{
class
{
‘acme’:
version
=>
hiera(‘version’)
...
}
}
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Sunday, April 7, 13

15. misc
• Write docs
• Include a README + license
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Sunday, April 7, 13

16. www.nedap.com
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Sunday, April 7, 13

17. www.nedap.com
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Sunday, April 7, 13

18. rspec-puppet
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19. setup
• Setup:
• use puppetlabs_spec_helper
• https://puppetlabs.com/blog/the-
next-generation-of-puppet-module-
testing/
• Read the tutorial:
• http://rspec-puppet.com/tutorial/
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Sunday, April 7, 13

20. setup
source
:rubygems
gem
'puppet'
,
'~>
3.1'
gem
'facter'
,
'~>
1.6.18'
gem
'puppet-­‐lint'
,
'~>
0.3.2'
gem
'puppetlabs_spec_helper'
,
'~>
0.4.1'
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Sunday, April 7, 13

21. data
• let
:params
do
{}
end
• let
:facts
do
{}
end
• let
:pre_condition
do
{}
end
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Sunday, April 7, 13

22. matchers
• should ⬌
should_not
• include_type
• with_attr(‘value’)
• ‘value2’})
with({:attr1
=>
‘value1’,
:attr2
=>
• with_content(regex)
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Sunday, April 7, 13

23. example
describe
'acme'
do
it
'should
declare
itself'
do
should
contain_class('acme')
end
end
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Sunday, April 7, 13

24. example
context
‘on
Debian’
do
let
:facts
do
{
:osfamily
=>
‘Debian’
}
end
let
:params
do
{
:ver
=>
‘1.2’
}
end
it
‘should
install
mysql’
do
should
contain_package(‘mysql’).with_ensure(params[:ver]})
end
it
‘should
not
install
redis’
do
should_not
contain_package(‘redis’).with_ensure(‘present’)
end
end
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Sunday, April 7, 13

25. success
module
git:master
›❯
rake
spec
.............
Finished
in
2.43
seconds
13
examples,
0
failures
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Sunday, April 7, 13

26. www.nedap.com
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Sunday, April 7, 13

27. automate
• Generate module structure
• init, install, config, services, params
• Generate tests
• Generate README
• CI
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Sunday, April 7, 13

28. behaviour
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Sunday, April 7, 13

29. options
• Deploy to a testing environment
• Monitor your testing environment
• Test with rspec-...?
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Sunday, April 7, 13

30. environment
• Jenkins + vagrant
• Can’t run on slaves
• Can’t run concurrent builds
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Sunday, April 7, 13

31. monitoring
• Any tool you want to:
• nagios / icinga
• zabbix / zenoss / sensu
• ...
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Sunday, April 7, 13

32. www.nedap.com
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Sunday, April 7, 13

33. q?
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Sunday, April 7, 13