How and why you should test
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Sunday, April 7, 13
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"How and why you should test" by Daniele Sluijters at Puppet Camp Amsterdam 2013.
Transcript of How and why you should test
Sunday, April 7, 13
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testing!before production not in production
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whoami
• Daniele Sluijters
• @daenney: irc, twitter, github, ...
• mail: [email protected]
• XMPP / Jabber: ☝
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consequences
exec { ‘first-‐run-‐reboot’:
command => ‘touch /tmp/first-‐run \ && reboot’,
creates => ‘/tmp/first-‐run’,
}
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avoid latestclass mysql {
package { ‘mysql-‐server’:
ensure => latest,
notify => Service[‘mysql’],
}
}
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paramsclass acme::params {
case $::osfamily {
‘Debian’: { $founder = ‘Marvin’ }
default: { fail(“No can’t do.”) }
}
}
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paramsclass acme::package {
package { ‘marvin’:
ensure => $::acme::version,
}
...
}
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configurableclass acme(
$version = ‘1.6’,
$enable = true,
) inherits acme::params {
...
}
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users are crazyclass acme(
$version = ‘1.6’,
$enable = true,
){
validate_string($version)
validate_bool($enable)
}
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data sources
• Don’t couple modules to data
• Pass in data through params
• Use a profile to configure the module
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profileclass profile::acme {
class { ‘acme’:
version => hiera(‘version’)
...
}
}
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misc
• Write docs
• Include a README + license
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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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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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data
• let :params do {} end
• let :facts do {} end
• let :pre_condition do {} end
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matchers
• should ⬌ should_not
• include_type
• with_attr(‘value’)
• with({:attr1 => ‘value1’, :attr2 => ‘value2’})
• with_content(regex)
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example
describe 'acme' do
it 'should declare itself' do
should contain_class('acme')
end
end
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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
example
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success
module git:master ›❯ rake spec.............
Finished in 2.43 seconds
13 examples, 0 failures
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automate
• Generate module structure
• init, install, config, services, params
• Generate tests
• Generate README
• CI
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options
• Deploy to a testing environment
• Monitor your testing environment
• Test with rspec-...?
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environment
• Jenkins + vagrant
• Can’t run on slaves
• Can’t run concurrent builds
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monitoring
• Any tool you want to:
• nagios / icinga
• zabbix / zenoss / sensu
• ...
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