Added new apt_reboot_required fact, updated readme, and added unit tests

README.md

@@ -217,6 +217,8 @@ apt::sources:
 
 * `apt_update_last_success`: The date, in epochtime, of the most recent successful `apt-get update` run (based on the mtime of  /var/lib/apt/periodic/update-success-stamp).
 
+* `apt_reboot_required`: Determines if a reboot is necessary after updates have been installed.
+
 #### Class: `apt`
 
 Main class, includes all other classes.
@@ -443,4 +445,4 @@ Puppet Labs modules on the Puppet Forge are open projects, and community contrib
 
 For more information, see our [module contribution guide.](https://docs.puppetlabs.com/forge/contributing.html)
 
-To see who's already involved, see the [list of contributors.](https://github.com/puppetlabs/puppetlabs-apt/graphs/contributors)
+To see who's already involved, see the [list of contributors.](https://github.com/puppetlabs/puppetlabs-apt/graphs/contributors)

lib/facter/apt_reboot_required.rb

@@ -0,0 +1,7 @@
+# apt_reboot_required.rb
+Facter.add(:apt_reboot_required) do
+  confine :osfamily => 'Debian'
+  setcode do
+    File.file?('/var/run/reboot-required')
+  end
+end

spec/unit/facter/apt_reboot_required_spec.rb

@@ -0,0 +1,23 @@
+require 'spec_helper'
+
+describe 'apt_reboot_required fact' do
+  subject { Facter.fact(:apt_reboot_required).value }
+  after(:each) { Facter.clear }
+
+  describe 'if a reboot is required' do
+    before {
+      Facter.fact(:osfamily).stubs(:value).returns 'Debian'
+      File.stubs(:file?).returns true
+    }
+    it { expect(Facter.fact(:apt_reboot_required).value).to eq true }
+  end
+
+  describe 'if a reboot is not required' do
+    before {
+      Facter.fact(:osfamily).stubs(:value).returns 'Debian'
+      File.stubs(:file?).returns false
+    }
+    it { expect(Facter.fact(:apt_reboot_required).value).to eq false }
+  end
+
+end