(maint) Make spec tests pass on windows

Windows requires the current puppet collection to be specified in
the puppet_agent class, so that is refactored to be globally
specified in the `spec_helper_acceptance`. Additionally, logic was
added to specifiy default install paths for the VERSION file for
both linux and windows.

manifests/init.pp

@@ -126,6 +126,7 @@
   $wait_for_pxp_agent_exit = undef,
   $wait_for_puppet_run     = undef,
   Array[Puppet_agent::Config] $config = [],
+  $version_file_path       = $facts['os']['family'] ? { 'windows' => 'C:\Program Files\Puppet Labs\Puppet\VERSION', default => '/opt/puppetlabs/puppet/VERSION' }
 ) inherits ::puppet_agent::params {
   # The configure class uses $puppet_agent::config to manage settings in
   # puppet.conf, and will always be present. It does not require management of
@@ -161,7 +162,7 @@
     # The AIO package version and Puppet version can, on rare occasion, diverge.
     # This logic checks for the AIO version of the server, since that's what the package manager cares about.
     if $package_version == 'auto' {
-      $master_or_package_version = chomp(file('/opt/puppetlabs/puppet/VERSION'))
+      $master_or_package_version = chomp(file($version_file_path))
     } else {
       $master_or_package_version = $package_version
     }

spec/acceptance/class_spec.rb

@@ -5,7 +5,7 @@
   context 'default parameters in apply' do
     before(:all) do
       setup_puppet_on default
-      pp = "class { 'puppet_agent': package_version => 'auto'}"
+      pp = "class { 'puppet_agent': package_version => 'auto', collection => #{PUPPET_COLLECTION}}"
       apply_manifest(pp, catch_failures: true)
     end
     after(:all) { teardown_puppet_on default }

spec/spec_helper_acceptance.rb

@@ -22,6 +22,7 @@ def stop_firewall_on(host)
 # Project root
 PROJ_ROOT = File.expand_path(File.join(File.dirname(__FILE__), '..'))
 TEST_FILES = File.expand_path(File.join(File.dirname(__FILE__), 'acceptance', 'files'))
+PUPPET_COLLECTION = 'puppet7'.freeze
 
 def install_modules_on(host)
   install_ca_certs_on(host)
@@ -37,7 +38,7 @@ def install_modules_on(host)
   master['puppetservice'] = 'puppetserver'
   master['puppetserver-confdir'] = '/etc/puppetlabs/puppetserver/conf.d'
   master['type'] = 'aio'
-  install_puppet_agent_on master, { version: ENV['PUPPET_CLIENT_VERSION'] || '7.23.0', puppet_collection: 'puppet7' }
+  install_puppet_agent_on master, { version: ENV['PUPPET_CLIENT_VERSION'] || '7.23.0', puppet_collection: PUPPET_COLLECTION }
   install_modules_on master
   stop_firewall_on master
 end
@@ -71,7 +72,7 @@ def setup_puppet_on(host, opts = {})
 
   puts "Setup aio puppet on #{host}"
   configure_type_defaults_on host
-  install_puppet_agent_on host, { version: ENV['PUPPET_CLIENT_VERSION'] || '7.23.0', puppet_collection: 'puppet7' }
+  install_puppet_agent_on host, { version: ENV['PUPPET_CLIENT_VERSION'] || '7.23.0', puppet_collection: PUPPET_COLLECTION }
 
   puppet_opts = agent_opts(master.to_s)
   if %r{windows}i.match?(host['platform'])