Update testing environment

.kitchen.yml

 ---
 driver:
-  name: vagrant
+  name: docker
+
+driver_config:
+  use_sudo: false
+  privileged: true
+  provision_command: mkdir -p /run/sshd
+  run_command: /lib/systemd/systemd
 
 platforms:
-  - name: centos-7.2
+  - name: debian-9
+  - name: ubuntu-18.04
+  - name: centos-7
 
 provisioner:
   name: salt_solo
-  salt_install: bootstrap
-  salt_bootstrap_url: https://bootstrap.saltstack.com
+  log_level: info
+  require_chef: false
   salt_version: latest
   formula: firewalld
+  salt_copy_filter:
+    - .kitchen
+    - .git
   pillars:
     top.sls:
       base:
                 - 24007-24008
                 - 49152-49200
 
+verifier:
+  name: inspec
+  sudo: false
+  # cli, documentation, html, progress, json, json-min, json-rspec, junit
+  reporter: cli
+  inspec_tests:
+    - path: test/integration/default
+
 suites:
   - name: default
     provisioner:
-      salt_bootstrap_options: -X -d
       state_top:
         base:
           '*':

.travis.yml

+sudo: required
+cache: bundler
+language: ruby
+
+services:
+  - docker
+
+before_install:
+  - bundle install
+
+env:
+  matrix:
+    - INSTANCE: default-debian-9
+    - INSTANCE: default-ubuntu-1804
+    - INSTANCE: default-centos-7
+
+script:
+  - bundle exec kitchen verify ${INSTANCE}
+

Gemfile

+source "https://rubygems.org"
+
+gem "test-kitchen", '>=1.20.0'
+gem "kitchen-docker"
+gem "kitchen-salt", ">=0.1.0"
+gem "kitchen-inspec"
+

test/integration/default/serverspec/firewalld_server_spec.rb → test/integration/default/firewalld_spec.rb

-require 'serverspec'
-set :backend, :exec
-
 describe service('firewalld') do
   it { should be_running }
 end