Coming from regular language testing your first thought with puppet is how
do I control the flow of code when testing. In normal languages you can
mock the functions, getters, setters and possibly instance variables. With
puppet its a bit different.
You can control the flow of puppet code only by influencing puppet facts
and class / define parameters, and a few other things. You can also mock
functions as well but generally you don't need to.
Since the rspec-puppet subject is always the compiled catalog, everything
your testing against must be or not be in the catalog. Rspec-puppet
compiles that catalog and each test you make checks that the end result of
the catalog compilation with your influenced facts and parameters. Don't
be concerned with checking variable content explicitly, since all variables
will be present in some other resource or template that you can test
against. And yes you can test the rendered template for specific content.
What this usually means is that given a conditional block you need to test
against the resource that contains your variable with a negative and
positive test.
Example puppet code:
if $::osfamily == 'RedHat' {
notify{"Hello from Conditional block":}
}
## Test code
describe :RedHat do
let(:facts) {{ :osfamily => 'RedHat'}}
it { should contain_notify('Hello from Conditional block') }
end
describe :Windows do
let(:facts) {{ :osfamily => 'Windows'}}
it { should_not contain_notify('Hello from Conditional block') }
end
Remember that your testing against the compiled catalog which either should
or should_not contain the resource.
Now if you just want to see what is inside your variable you can use the
dump_args function to output the variable, write a notify resource or use
the inline template function. I wrote this a while ago to making dumping
variables to STDOUT easy.
https://github.com/logicminds/puppetlabs-stdlib/blob/63a1e75ef91865903945b7d2083ae293dadf6104/lib/puppet/parser/functions/dump_args.rb
dump_args($var1, $var2, $var3, ...)
Also for mocking functions I would recommend using the following gem.
https://github.com/Accuity/rspec-puppet-utils
Lastly, if you want your module to be setup automatically for testing, in
addition to automated test generation, you should check this out.
https://github.com/logicminds/puppet-retrospec
Corey
On Friday, March 28, 2014 at 7:39:59 AM UTC-7, Trevor Vaughan wrote:
>
> Hopefully I didn't just overlook this in the docs but, in rspec-puppet,
> how would you go about getting the value of $bar from the following?
>
> class foo {
> $bar = interesting_function('baz')
> }
>
> I've inspected everything that I think is obvious and I don't want to try
> and stub what 'interesting_function' should be doing since it's dynamic.
>
> Any ideas?
>
> Thanks,
>
> Trevor
>
> --
> Trevor Vaughan
> Vice President, Onyx Point, Inc
> (410) 541-6699
> [email protected] <javascript:>
>
> -- This account not approved for unencrypted proprietary information --
>
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