Add Unit testing

.fixtures.yml

@@ -0,0 +1,6 @@
+---
+fixtures:
+  repositories:
+    stdlib: https://github.com/puppetlabs/puppetlabs-stdlib.git
+    sudo: https://github.com/saz/puppet-sudo.git
+    systemd: https://github.com/voxpupuli/puppet-systemd.git

spec/classes/init_spec.rb

@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe 'bolt' do
+  on_supported_os.each do |os, facts|
+    context "on #{os}" do
+      let :facts do
+        facts
+      end
+
+      context 'with all defaults' do
+        it { is_expected.to compile.with_all_deps }
+        it { is_expected.to contain_package('puppet-bolt') }
+        it { is_expected.to contain_package('puppet-tools-release') }
+        it { is_expected.not_to contain_yumrepo('puppet-tools') }
+      end
+
+      context 'with use_release_package=false' do
+        let :params do
+          { use_release_package: false }
+        end
+
+        it { is_expected.not_to contain_package('puppet-tools-release') }
+        it { is_expected.to contain_yumrepo('puppet-tools') }
+      end
+    end
+  end
+end