Puppet: rake spec could not find class ::splunk

I'm trying to tests my puppet modules, but I get an error message that it can't find class.

I've written a couple of internally used Puppet modules; now that I have my head around puppet, I want to write tests. Since I ran into issues, I decided to essentially start over with a new clean module to figure out what I need to do.

$puppet module generate wet-splunk
<<snip interactive questions>>
$cd splunk
$rake spec
<path snip>ruby -I/Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-support-3.4.1/lib:/Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-core-3.4.1/lib /Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-core-3.4.1/exe/rspec --pattern spec/\{classes,defines,unit,functions,hosts,integration,types\}/\*\*/\*_spec.rb --color
F

Failures:

  1) splunk with defaults for all parameters should contain Class[splunk]
     Failure/Error: it { should contain_class('splunk') }

     Puppet::PreformattedError:
       Evaluation Error: Error while evaluating a Function Call, Could not find class ::splunk for host.example.com at line 1:1 on node host.example.com
     # ./spec/classes/init_spec.rb:5:in `block (3 levels) in <top (required)>'

Finished in 0.21712 seconds (files took 3.14 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/classes/init_spec.rb:5 # splunk with defaults for all parameters should contain Class[splunk]

/Users/wet/.rbenv/versions/1.9.3-p0/bin/ruby -I/Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-support-3.4.1/lib:/Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-core-3.4.1/lib /Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-core-3.4.1/exe/rspec --pattern spec/\{classes,defines,unit,functions,hosts,integration,types\}/\*\*/\*_spec.rb --color failed

Checking the files though I think they contain what they should:

manifests/init.pp

# <snip documentation boilterplate>
class splunk {    
}

spec/classes/init_spec.rb

require 'spec_helper'
describe 'splunk' do

  context 'with defaults for all parameters' do
    it { should contain_class('splunk') }
  end
end

The Could not find class ::splunk is the part that has me confused.

The way I read the spec file is it looking inside init for class{'splunk': ... } That could be me misreading it as it seems odd they would start with a broken spec file, but just in case I tried testing for package instead.

manifests/init.pp

class splunk {
  package{'splunk':
    ensure => 'present',
  }
}

spec/classes/init_spec.rb

require 'spec_helper'
describe 'splunk' do

  context 'with defaults for all parameters' do
    it { should contain_package('splunk') }
  end
end

I still get a similar error message:

$ rake spec
/Users/wet/.rbenv/versions/1.9.3-p0/bin/ruby -I/Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-support-3.4.1/lib:/Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-core-3.4.1/lib /Users/wet/.rbenv/versions/1.9.3-p0/lib/ruby/gems/1.9.1/gems/rspec-core-3.4.1/exe/rspec --pattern spec/\{classes,defines,unit,functions,hosts,integration,types\}/\*\*/\*_spec.rb --color
F

Failures:

  1) splunk with defaults for all parameters should contain Package[splunk]
     Failure/Error: it { should contain_package('splunk') }

     Puppet::PreformattedError:
       Evaluation Error: Error while evaluating a Function Call, Could not find class ::splunk for host.example.com at line 1:1 on node host.example.com
     # ./spec/classes/init_spec.rb:6:in `block (3 levels) in <top (required)>'

Finished in 0.21168 seconds (files took 3.17 seconds to load)
1 example, 1 failure

Failed examples:

rspec ./spec/classes/init_spec.rb:6 # splunk with defaults for all parameters should contain Package[splunk]

Sorry to ask such a basic question; I really appreciate your help. I'd really love links to good tutorials on testing Puppet code; I'd love to use Vagrant to have some confidence my code is actually going to do what I want it to.