Add unit tests

.fixtures.yml

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+fixtures:
+  symlinks:
+    ssh: "#{source_dir}"

.gitignore

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+Gemfile.lock
+*.swp

.travis.yml

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+language: ruby
+bundler_args: --without development
+script:
+  - bundle exec rake spec SPEC_OPTS='--format documentation'
+  - bundle exec rake lint
+rvm:
+  - 1.8.7
+  - 1.9.3
+  - 2.0.0
+  - 2.1.2
+env:
+  - PUPPET_GEM_VERSION="~> 2.7.0"
+  - PUPPET_GEM_VERSION="~> 3.1.0"
+  - PUPPET_GEM_VERSION="~> 3.2.0"
+  - PUPPET_GEM_VERSION="~> 3.3.0"
+  - PUPPET_GEM_VERSION="~> 3.4.0"
+  - PUPPET_GEM_VERSION="~> 3.5.0"
+  - PUPPET_GEM_VERSION="~> 3.6.0"
+matrix:
+  fast_finish: true
+  exclude:
+    - rvm: 1.9.3
+      env: PUPPET_GEM_VERSION="~> 2.7.0"
+    - rvm: 2.0.0
+      env: PUPPET_GEM_VERSION="~> 2.7.0"
+    - rvm: 2.0.0
+      env: PUPPET_GEM_VERSION="~> 3.1.0"
+    - rvm: 2.1.2
+      env: PUPPET_GEM_VERSION="~> 2.7.0"
+    - rvm: 2.1.2
+      env: PUPPET_GEM_VERSION="~> 3.1.0"
+    - rvm: 2.1.2
+      env: PUPPET_GEM_VERSION="~> 3.2.0"
+    - rvm: 2.1.2
+      env: PUPPET_GEM_VERSION="~> 3.3.0"
+    - rvm: 2.1.2
+      env: PUPPET_GEM_VERSION="~> 3.4.0"

Gemfile

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+source 'https://rubygems.org'
+
+group :development, :test do
+  gem 'puppetlabs_spec_helper', :require => false
+  gem 'puppet-lint',            :require => false
+end
+
+if puppetversion = ENV['PUPPET_GEM_VERSION']
+  gem 'puppet', puppetversion, :require => false
+else
+  gem 'puppet', :require => false
+end

Rakefile

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+require 'rubygems'
+require 'puppetlabs_spec_helper/rake_tasks'
+require 'puppet-lint/tasks/puppet-lint'
+PuppetLint.configuration.send('disable_80chars')
+PuppetLint.configuration.ignore_paths = ["spec/**/*.pp", "pkg/**/*.pp"]
+
+desc "Validate manifests, templates, and ruby files"
+task :validate do
+  Dir['manifests/**/*.pp'].each do |manifest|
+    sh "puppet parser validate --noop #{manifest}"
+  end
+  Dir['spec/**/*.rb','lib/**/*.rb'].each do |ruby_file|
+    sh "ruby -c #{ruby_file}" unless ruby_file =~ /spec\/fixtures/
+  end
+  Dir['templates/**/*.erb'].each do |template|
+    sh "erb -P -x -T '-' #{template} | ruby -c"
+  end
+end
+
+PuppetLint.configuration.send('disable_class_parameter_defaults')
+PuppetLint.configuration.fail_on_warnings = true
+task :default => [:spec, :lint, :validate]

spec/classes/ssh_spec.rb

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+require 'spec_helper'
+
+describe 'ssh' do
+  let(:facts) {{
+    :osfamily => 'Debian',
+  }}
+  it { should compile.with_all_deps }
+end

spec/spec_helper.rb

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+require 'puppetlabs_spec_helper/module_spec_helper'
+
+RSpec.configure do |c|
+  c.include PuppetlabsSpec::Files
+
+  c.before :each do
+    # Ensure that we don't accidentally cache facts and environment
+    # between test cases.
+    Facter::Util::Loader.any_instance.stubs(:load_all)
+    Facter.clear
+    Facter.clear_messages
+
+    # Store any environment variables away to be restored later
+    @old_env = {}
+    ENV.each_key {|k| @old_env[k] = ENV[k]}
+
+    if Gem::Version.new(`puppet --version`) >= Gem::Version.new('3.5')
+      Puppet.settings[:strict_variables]=true
+    end
+  end
+
+  c.after :each do
+    PuppetlabsSpec::Files.cleanup
+  end
+end