diff --git a/lib/puppet/provider/zpool/zpool.rb b/lib/puppet/provider/zpool/zpool.rb
index c095c6a..ce40c0a 100644
--- a/lib/puppet/provider/zpool/zpool.rb
+++ b/lib/puppet/provider/zpool/zpool.rb
@@ -1,144 +1,193 @@
 Puppet::Type.type(:zpool).provide(:zpool) do
   desc 'Provider for zpool.'
 
   commands zpool: 'zpool'
 
   # NAME    SIZE  ALLOC   FREE    CAP  HEALTH  ALTROOT
   def self.instances
     zpool(:list, '-H').split("\n").map do |line|
       name, _size, _alloc, _free, _cap, _health, _altroot = line.split(%r{\s+})
       new(name: name, ensure: :present)
     end
   end
 
+  def get_zpool_property(prop)
+    zpool(:get, prop, @resource[:name]).split("\n").reverse.map { |line|
+      name, _property, value, _source = line.split("\s")
+      value if name == @resource[:name]
+    }.shift
+  end
+
   def process_zpool_data(pool_array)
     if pool_array == []
       return Hash.new(:absent)
     end
     # get the name and get rid of it
     pool = {}
     pool[:pool] = pool_array[0]
     pool_array.shift
 
     tmp = []
 
     # order matters here :(
     pool_array.reverse_each do |value|
       sym = nil
       case value
       when 'spares'
         sym = :spare
       when 'logs'
         sym = :log
       when %r{^mirror|^raidz1|^raidz2}
         sym = (value =~ %r{^mirror}) ? :mirror : :raidz
         pool[:raid_parity] = 'raidz2' if value =~ %r{^raidz2}
       else
         # get full drive name if the value is a partition (Linux only)
         tmp << if Facter.value(:kernel) == 'Linux' && value =~ %r{/dev/(:?[a-z]+1|disk/by-id/.+-part1)$}
                  execute("lsblk -p -no pkname #{value}").chomp
                else
                  value
                end
         sym = :disk if value == pool_array.first
       end
 
       if sym
         pool[sym] = (pool[sym]) ? pool[sym].unshift(tmp.reverse.join(' ')) : [tmp.reverse.join(' ')]
         tmp.clear
       end
     end
 
     pool
   end
 
   # rubocop:disable Style/AccessorMethodName
   # rubocop:disable Style/NumericPredicate
   def get_pool_data
     # https://docs.oracle.com/cd/E19082-01/817-2271/gbcve/index.html
     # we could also use zpool iostat -v mypool for a (little bit) cleaner output
     zpool_opts = case Facter.value(:kernel)
                  # use full device names ("-P") on Linux/ZOL to prevent
                  # mismatches between creation and display paths:
                  when 'Linux'
                    '-P'
                  else
                    ''
                  end
     out = execute("zpool status #{zpool_opts} #{@resource[:pool]}", failonfail: false, combine: false)
     zpool_data = out.lines.select { |line| line.index("\t") == 0 }.map { |l| l.strip.split("\s")[0] }
     zpool_data.shift
     zpool_data
   end
 
   def current_pool
     @current_pool = process_zpool_data(get_pool_data) unless defined?(@current_pool) && @current_pool
     @current_pool
   end
 
   def flush
     @current_pool = nil
   end
 
   # Adds log and spare
   def build_named(name)
     prop = @resource[name.to_sym]
     if prop
       [name] + prop.map { |p| p.split(' ') }.flatten
     else
       []
     end
   end
 
   # query for parity and set the right string
   def raidzarity
     (@resource[:raid_parity]) ? @resource[:raid_parity] : 'raidz1'
   end
 
   # handle mirror or raid
   def handle_multi_arrays(prefix, array)
     array.map { |a| [prefix] + a.split(' ') }.flatten
   end
 
   # builds up the vdevs for create command
   def build_vdevs
     disk = @resource[:disk]
     mirror = @resource[:mirror]
     raidz = @resource[:raidz]
 
     if disk
       disk.map { |d| d.split(' ') }.flatten
     elsif mirror
       handle_multi_arrays('mirror', mirror)
     elsif raidz
       handle_multi_arrays(raidzarity, raidz)
     end
   end
 
+  def add_pool_properties
+    properties = []
+    [:ashift, :autoexpand, :failmode].each do |property|
+      if (value = @resource[property]) && value != ''
+        properties << '-o' << "#{property}=#{value}"
+      end
+    end
+    properties
+  end
+
   def create
-    zpool(*([:create, @resource[:pool]] + build_vdevs + build_named('spare') + build_named('log')))
+    zpool(*([:create] + add_pool_properties + [@resource[:pool]] + build_vdevs + build_named('spare') + build_named('log')))
   end
 
   def destroy
     zpool :destroy, @resource[:pool]
   end
 
   def exists?
     if current_pool[:pool] == :absent
       false
     else
       true
     end
   end
 
   [:disk, :mirror, :raidz, :log, :spare].each do |field|
     define_method(field) do
       current_pool[field]
     end
 
     # rubocop:disable Style/SignalException
     define_method(field.to_s + '=') do |should|
       fail "zpool #{field} can't be changed. should be #{should}, currently is #{current_pool[field]}"
     end
   end
+
+  [:autoexpand, :failmode].each do |field|
+    define_method(field) do
+      get_zpool_property(field)
+    end
+
+    define_method(field.to_s + '=') do |should|
+      zpool(:set, "#{field}=#{should}", @resource[:name])
+    end
+  end
+
+  # Borrow the code from the ZFS provider here so that we catch and return '-'
+  # as ashift is linux only.
+  # see lib/puppet/provider/zfs/zfs.rb
+
+  PARAMETER_UNSET_OR_NOT_AVAILABLE = '-'.freeze
+
+  define_method(:ashift) do
+    begin
+      get_zpool_property(:ashift)
+    rescue
+      PARAMETER_UNSET_OR_NOT_AVAILABLE
+    end
+  end
+
+  define_method('ashift=') do |should|
+    begin
+      zpool(:set, "ashift=#{should}", @resource[:name])
+    rescue
+      PARAMETER_UNSET_OR_NOT_AVAILABLE
+    end
+  end
 end
diff --git a/lib/puppet/type/zpool.rb b/lib/puppet/type/zpool.rb
index 5c479b8..d1b4a8d 100644
--- a/lib/puppet/type/zpool.rb
+++ b/lib/puppet/type/zpool.rb
@@ -1,107 +1,123 @@
 # ZPool type
 module Puppet
   # Puppet::Property
   class Property
     # VDev class
     class VDev < Property
       # @param array the array to be flattened and sorted
       # @return [Array] returns a flattened and sorted array
       def flatten_and_sort(array)
         array = [array] unless array.is_a? Array
         array.map { |a| a.split(' ') }.flatten.sort
       end
 
       # @param is the current state of the object
       # @return [Boolean] if the resource is in sync with what it should be
       def insync?(is)
         return @should == [:absent] if is == :absent
 
         flatten_and_sort(is) == flatten_and_sort(@should)
       end
     end
 
     # MultiVDev class
     class MultiVDev < VDev
       # @param is the current state of the object
       # @return [Boolean] if the resource is in sync with what it should be
       def insync?(is)
         return @should == [:absent] if is == :absent
 
         return false unless is.length == @should.length
 
         is.each_with_index { |list, i| return false unless flatten_and_sort(list) == flatten_and_sort(@should[i]) }
 
         # if we made it this far we are in sync
         true
       end
     end
   end
 
   Type.newtype(:zpool) do
     desc <<-DESC
   Manage zpools. Create and delete zpools. The provider WILL NOT SYNC, only report differences.
 
   Supports vdevs with mirrors, raidz, logs and spares.
 
   @example Using zpool.
     zpool { 'tstpool':
       ensure => present,
       disk => '/ztstpool/dsk',
     }
   DESC
 
     ensurable
 
     newproperty(:disk, array_matching: :all, parent: Puppet::Property::VDev) do
       desc 'The disk(s) for this pool. Can be an array or a space separated string.'
     end
 
     newproperty(:mirror, array_matching: :all, parent: Puppet::Property::MultiVDev) do
       desc "List of all the devices to mirror for this pool. Each mirror should be a
       space separated string:
 
           mirror => [\"disk1 disk2\", \"disk3 disk4\"],
 
       "
 
       validate do |value|
         raise ArgumentError, _('mirror names must be provided as string separated, not a comma-separated list') if value.include?(',')
       end
     end
 
     newproperty(:raidz, array_matching: :all, parent: Puppet::Property::MultiVDev) do
       desc "List of all the devices to raid for this pool. Should be an array of
       space separated strings:
 
           raidz => [\"disk1 disk2\", \"disk3 disk4\"],
 
       "
 
       validate do |value|
         raise ArgumentError, _('raid names must be provided as string separated, not a comma-separated list') if value.include?(',')
       end
     end
 
     newproperty(:spare, array_matching: :all, parent: Puppet::Property::VDev) do
       desc 'Spare disk(s) for this pool.'
     end
 
     newproperty(:log, array_matching: :all, parent: Puppet::Property::VDev) do
       desc 'Log disks for this pool. This type does not currently support mirroring of log disks.'
     end
 
+    newproperty(:ashift) do
+      desc 'The Alignment Shift for the vdevs in the given pool.'
+
+      validate do |_value|
+        raise Puppet::Error _('This property is only supported on Linux') unless Facter.value(:kernel) == 'Linux'
+      end
+    end
+
+    newproperty(:autoexpand) do
+      desc 'The autoexpand setting for the given pool. Valid values are `on` or `off`'
+    end
+
+    newproperty(:failmode) do
+      desc 'The failmode setting for the given pool. Valid values are `wait`, `continue` or `panic`'
+    end
+
     newparam(:pool) do
       desc 'The name for this pool.'
       isnamevar
     end
 
     newparam(:raid_parity) do
       desc 'Determines parity when using the `raidz` parameter.'
     end
 
     validate do
       has_should = [:disk, :mirror, :raidz].select { |prop| should(prop) }
       raise _('You cannot specify %{multiple_props} on this type (only one)') % { multiple_props: has_should.join(' and ') } if has_should.length > 1
     end
   end
 end
diff --git a/spec/unit/provider/zpool/zpool_spec.rb b/spec/unit/provider/zpool/zpool_spec.rb
index cfbd2c5..bf17159 100644
--- a/spec/unit/provider/zpool/zpool_spec.rb
+++ b/spec/unit/provider/zpool/zpool_spec.rb
@@ -1,265 +1,314 @@
 require 'spec_helper'
 
 describe Puppet::Type.type(:zpool).provider(:zpool) do
   let(:name) { 'mypool' }
   let(:zpool) { '/usr/sbin/zpool' }
 
   let(:resource) do
     Puppet::Type.type(:zpool).new(name: name, provider: :zpool)
   end
 
   let(:provider) { resource.provider }
 
   before(:each) do
     allow(provider.class).to receive(:which).with('zpool') { zpool }
     allow(Facter).to receive(:value).with(:kernel).and_return('Linux')
   end
 
   context '#current_pool' do
     it 'calls process_zpool_data with the result of get_pool_data only once' do
       allow(provider).to receive(:get_pool_data).and_return(['foo', 'disk'])
       allow(provider).to receive(:process_zpool_data).with(['foo', 'disk']) { 'stuff' }
       expect(provider).to receive(:process_zpool_data).with(['foo', 'disk']).once
 
       provider.current_pool
       provider.current_pool
     end
   end
 
   describe 'self.instances' do
     it 'has an instances method' do
       expect(provider.class).to respond_to(:instances)
     end
 
     it 'lists instances' do
       allow(provider.class).to receive(:zpool).with(:list, '-H') { File.read(my_fixture('zpool-list.out')) }
       instances = provider.class.instances.map { |p| { name: p.get(:name), ensure: p.get(:ensure) } }
       expect(instances.size).to eq(2)
       expect(instances[0]).to eq(name: 'rpool', ensure: :present)
       expect(instances[1]).to eq(name: 'mypool', ensure: :present)
     end
   end
 
   context '#flush' do
     it 'reloads the pool' do
       allow(provider).to receive(:get_pool_data)
       allow(provider).to receive(:process_zpool_data).and_return('stuff')
       expect(provider).to receive(:process_zpool_data).twice
       provider.current_pool
       provider.flush
       provider.current_pool
     end
   end
 
   context '#process_zpool_data' do
     let(:zpool_data) { ['foo', 'disk'] }
 
     describe 'when there is no data' do
       it 'returns a hash with ensure=>:absent' do
         expect(provider.process_zpool_data([])[:ensure]).to eq(:absent)
       end
     end
 
     describe 'when there are full path disks on Linux' do
       it 'munges partitions into disk names' do
         allow(provider).to receive(:execute).with('lsblk -p -no pkname /dev/sdc1').and_return('/dev/sdc')
         allow(provider).to receive(:execute).with('lsblk -p -no pkname /dev/disk/by-id/disk_serial-0:0-part1').and_return('/dev/disk/by-id/disk_serial-0:0')
         zpool_data = ['foo', '/dev/sdc1', '/dev/disk/by-id/disk_serial-0:0-part1']
         expect(provider.process_zpool_data(zpool_data)[:disk]).to eq(['/dev/sdc /dev/disk/by-id/disk_serial-0:0'])
       end
     end
 
     describe 'when there is a spare' do
       it 'adds the spare disk to the hash' do
         zpool_data.concat ['spares', 'spare_disk']
         expect(provider.process_zpool_data(zpool_data)[:spare]).to eq(['spare_disk'])
       end
     end
 
     describe 'when there are two spares' do
       it 'adds the spare disk to the hash as a single string' do
         zpool_data.concat ['spares', 'spare_disk', 'spare_disk2']
         expect(provider.process_zpool_data(zpool_data)[:spare]).to eq(['spare_disk spare_disk2'])
       end
     end
 
     describe 'when there is a log' do
       it 'adds the log disk to the hash' do
         zpool_data.concat ['logs', 'log_disk']
         expect(provider.process_zpool_data(zpool_data)[:log]).to eq(['log_disk'])
       end
     end
 
     describe 'when there are two logs' do
       it 'adds the log disks to the hash as a single string' do
         zpool_data.concat ['spares', 'spare_disk', 'spare_disk2']
         expect(provider.process_zpool_data(zpool_data)[:spare]).to eq(['spare_disk spare_disk2'])
       end
     end
 
     describe 'when the vdev is a single mirror' do
       it 'calls create_multi_array with mirror' do
         zpool_data = ['mirrorpool', 'mirror', 'disk1', 'disk2']
         expect(provider.process_zpool_data(zpool_data)[:mirror]).to eq(['disk1 disk2'])
       end
     end
 
     describe 'when the vdev is a single mirror on solaris 10u9 or later' do
       it 'calls create_multi_array with mirror' do
         zpool_data = ['mirrorpool', 'mirror-0', 'disk1', 'disk2']
         expect(provider.process_zpool_data(zpool_data)[:mirror]).to eq(['disk1 disk2'])
       end
     end
 
     describe 'when the vdev is a double mirror' do
       it 'calls create_multi_array with mirror' do
         zpool_data = ['mirrorpool', 'mirror', 'disk1', 'disk2', 'mirror', 'disk3', 'disk4']
         expect(provider.process_zpool_data(zpool_data)[:mirror]).to eq(['disk1 disk2', 'disk3 disk4'])
       end
     end
 
     describe 'when the vdev is a double mirror on solaris 10u9 or later' do
       it 'calls create_multi_array with mirror' do
         zpool_data = ['mirrorpool', 'mirror-0', 'disk1', 'disk2', 'mirror-1', 'disk3', 'disk4']
         expect(provider.process_zpool_data(zpool_data)[:mirror]).to eq(['disk1 disk2', 'disk3 disk4'])
       end
     end
 
     describe 'when the vdev is a raidz1' do
       it 'calls create_multi_array with raidz1' do
         zpool_data = ['mirrorpool', 'raidz1', 'disk1', 'disk2']
         expect(provider.process_zpool_data(zpool_data)[:raidz]).to eq(['disk1 disk2'])
       end
     end
 
     describe 'when the vdev is a raidz1 on solaris 10u9 or later' do
       it 'calls create_multi_array with raidz1' do
         zpool_data = ['mirrorpool', 'raidz1-0', 'disk1', 'disk2']
         expect(provider.process_zpool_data(zpool_data)[:raidz]).to eq(['disk1 disk2'])
       end
     end
 
     describe 'when the vdev is a raidz2' do
       it 'calls create_multi_array with raidz2 and set the raid_parity' do
         zpool_data = ['mirrorpool', 'raidz2', 'disk1', 'disk2']
         pool = provider.process_zpool_data(zpool_data)
         expect(pool[:raidz]).to eq(['disk1 disk2'])
         expect(pool[:raid_parity]).to eq('raidz2')
       end
     end
 
     describe 'when the vdev is a raidz2 on solaris 10u9 or later' do
       it 'calls create_multi_array with raidz2 and set the raid_parity' do
         zpool_data = ['mirrorpool', 'raidz2-0', 'disk1', 'disk2']
         pool = provider.process_zpool_data(zpool_data)
         expect(pool[:raidz]).to eq(['disk1 disk2'])
         expect(pool[:raid_parity]).to eq('raidz2')
       end
     end
   end
 
+  describe 'when calling the getters and setters for configurable options' do
+    [:autoexpand, :failmode].each do |field|
+      it "should get the #{field} value from the pool" do
+        allow(provider).to receive(:zpool).with(:get, field, name).and_return("NAME PROPERTY VALUE SOURCE\n#{name} #{field} value local")
+        expect(provider.send(field)).to eq('value')
+      end
+      it "should set #{field}=value" do
+        expect(provider).to receive(:zpool).with(:set, "#{field}=value", name)
+        provider.send("#{field}=", 'value')
+      end
+    end
+  end
+  describe 'when calling the getters and setters for ashift' do
+    context 'when available' do
+      it "gets 'ashift' property" do
+        expect(provider).to receive(:zpool).with(:get, :ashift, name).and_return("NAME PROPERTY VALUE SOURCE\n#{name} ashift value local")
+        expect(provider.send('ashift')).to eq('value')
+      end
+      it 'sets ashift=value' do
+        expect(provider).to receive(:zpool).with(:set, 'ashift=value', name)
+        provider.send('ashift=', 'value')
+      end
+    end
+
+    context 'when not available' do
+      it "gets '-' for the ashift property" do
+        expect(provider).to receive(:zpool).with(:get, :ashift, name).and_raise(RuntimeError, 'not valid')
+        expect(provider.send('ashift')).to eq('-')
+      end
+      it 'does not error out when trying to set ashift' do
+        expect(provider).to receive(:zpool).with(:set, 'ashift=value', name).and_raise(RuntimeError, 'not valid')
+        expect { provider.send('ashift=', 'value') }.not_to raise_error
+      end
+    end
+  end
+
   describe 'when calling the getters and setters' do
     [:disk, :mirror, :raidz, :log, :spare].each do |field|
       describe "when calling #{field}" do
         it "should get the #{field} value from the current_pool hash" do
           pool_hash = {}
           pool_hash[field] = 'value'
           allow(provider).to receive(:current_pool) { pool_hash }
 
           expect(provider.send(field)).to eq('value')
         end
       end
 
       describe "when setting the #{field}" do
         it "should fail if readonly #{field} values change" do
           allow(provider).to receive(:current_pool) { Hash.new('currentvalue') }
           expect {
             provider.send((field.to_s + '=').to_sym, 'shouldvalue')
           }.to raise_error(Puppet::Error, %r{can\'t be changed})
         end
       end
     end
   end
 
   context '#create' do
     context 'when creating disks for a zpool' do
       before(:each) do
         resource[:disk] = 'disk1'
       end
 
       it 'calls create with the build_vdevs value' do
         expect(provider).to receive(:zpool).with(:create, name, 'disk1')
         provider.create
       end
 
       it "calls create with the 'spares' and 'log' values" do
         resource[:spare] = ['value1']
         resource[:log] = ['value2']
         expect(provider).to receive(:zpool).with(:create, name, 'disk1', 'spare', 'value1', 'log', 'value2')
         provider.create
       end
     end
 
     context 'when creating mirrors for a zpool' do
       it "executes 'create' for a single group of mirrored devices" do
         resource[:mirror] = ['disk1 disk2']
         expect(provider).to receive(:zpool).with(:create, name, 'mirror', 'disk1', 'disk2')
         provider.create
       end
 
       it "repeats the 'mirror' keyword between groups of mirrored devices" do
         resource[:mirror] = ['disk1 disk2', 'disk3 disk4']
         expect(provider).to receive(:zpool).with(:create, name, 'mirror', 'disk1', 'disk2', 'mirror', 'disk3', 'disk4')
         provider.create
       end
     end
 
     describe 'when creating raidz for a zpool' do
       it "executes 'create' for a single raidz group" do
         resource[:raidz] = ['disk1 disk2']
         expect(provider).to receive(:zpool).with(:create, name, 'raidz1', 'disk1', 'disk2')
         provider.create
       end
 
       it "execute 'create' for a single raidz2 group" do
         resource[:raidz] = ['disk1 disk2']
         resource[:raid_parity] = 'raidz2'
         expect(provider).to receive(:zpool).with(:create, name, 'raidz2', 'disk1', 'disk2')
         provider.create
       end
 
       it "repeats the 'raidz1' keyword between each group of raidz devices" do
         resource[:raidz] = ['disk1 disk2', 'disk3 disk4']
         expect(provider).to receive(:zpool).with(:create, name, 'raidz1', 'disk1', 'disk2', 'raidz1', 'disk3', 'disk4')
         provider.create
       end
     end
+
+    describe 'when creating a zpool with options' do
+      before(:each) do
+        resource[:disk] = 'disk1'
+      end
+      [:ashift, :autoexpand, :failmode].each do |field|
+        it "should include field #{field}" do
+          resource[field] = field
+          expect(provider).to receive(:zpool).with(:create, '-o', "#{field}=#{field}", name, 'disk1')
+          provider.create
+        end
+      end
+    end
   end
 
   context '#delete' do
     it 'calls zpool with destroy and the pool name' do
       expect(provider).to receive(:zpool).with(:destroy, name)
       provider.destroy
     end
   end
 
   context '#exists?' do
     it 'gets the current pool' do
       allow(provider).to receive(:current_pool).and_return(pool: 'somepool')
       expect(provider).to receive(:current_pool)
       provider.exists?
     end
 
     it 'returns false if the current_pool is absent' do
       allow(provider).to receive(:current_pool).and_return(pool: :absent)
       expect(provider).to receive(:current_pool)
       expect(provider).not_to be_exists
     end
 
     it 'returns true if the current_pool has values' do
       allow(provider).to receive(:current_pool).and_return(pool: name)
       expect(provider).to receive(:current_pool)
       expect(provider).to be_exists
     end
   end
 end
diff --git a/spec/unit/type/zpool_spec.rb b/spec/unit/type/zpool_spec.rb
index 97eda6f..3ddbc2b 100644
--- a/spec/unit/type/zpool_spec.rb
+++ b/spec/unit/type/zpool_spec.rb
@@ -1,107 +1,107 @@
 require 'spec_helper'
 
 describe 'zpool' do
   describe Puppet::Type.type(:zpool) do
-    properties = [:ensure, :disk, :mirror, :raidz, :spare, :log]
+    properties = [:ensure, :disk, :mirror, :raidz, :spare, :log, :autoexpand, :failmode, :ashift]
     properties.each do |property|
       it "should have a #{property} property" do
         expect(described_class.attrclass(property).ancestors).to be_include(Puppet::Property)
       end
     end
 
     parameters = [:pool, :raid_parity]
     parameters.each do |parameter|
       it "should have a #{parameter} parameter" do
         expect(described_class.attrclass(parameter).ancestors).to be_include(Puppet::Parameter)
       end
     end
   end
 
   describe Puppet::Property::VDev do
     let(:resource) { instance_double('resource', :[]= => nil, :property => nil) }
     let(:vdev) do
       described_class.new(
         resource: resource,
       )
     end
 
     before(:each) do
       described_class.initvars
     end
 
     it 'is insync if the devices are the same' do
       vdev.should = ['dev1 dev2']
       expect(vdev).to be_safe_insync(['dev2 dev1'])
     end
 
     it 'is out of sync if the devices are not the same' do
       vdev.should = ['dev1 dev3']
       expect(vdev).not_to be_safe_insync(['dev2 dev1'])
     end
 
     it 'is insync if the devices are the same and the should values are comma separated' do
       vdev.should = ['dev1', 'dev2']
       expect(vdev).to be_safe_insync(['dev2 dev1'])
     end
 
     it 'is out of sync if the device is absent and should has a value' do
       vdev.should = ['dev1', 'dev2']
       expect(vdev).not_to be_safe_insync(:absent)
     end
 
     it 'is insync if the device is absent and should is absent' do
       vdev.should = [:absent]
       expect(vdev).to be_safe_insync(:absent)
     end
   end
 
   describe Puppet::Property::MultiVDev do
     let(:resource) { instance_double('resource', :[]= => nil, :property => nil) }
     let(:multi_vdev) do
       described_class.new(
         resource: resource,
       )
     end
 
     before(:each) do
       described_class.initvars
     end
 
     it 'is insync if the devices are the same' do
       multi_vdev.should = ['dev1 dev2']
       expect(multi_vdev).to be_safe_insync(['dev2 dev1'])
     end
 
     it 'is out of sync if the devices are not the same' do
       multi_vdev.should = ['dev1 dev3']
       expect(multi_vdev).not_to be_safe_insync(['dev2 dev1'])
     end
 
     it 'is out of sync if the device is absent and should has a value' do
       multi_vdev.should = ['dev1', 'dev2']
       expect(multi_vdev).not_to be_safe_insync(:absent)
     end
 
     it 'is insync if the device is absent and should is absent' do
       multi_vdev.should = [:absent]
       expect(multi_vdev).to be_safe_insync(:absent)
     end
 
     describe 'when there are multiple lists of devices' do
       it 'is in sync if each group has the same devices' do
         multi_vdev.should = ['dev1 dev2', 'dev3 dev4']
         expect(multi_vdev).to be_safe_insync(['dev2 dev1', 'dev3 dev4'])
       end
 
       it 'is out of sync if any group has the different devices' do
         multi_vdev.should = ['dev1 devX', 'dev3 dev4']
         expect(multi_vdev).not_to be_safe_insync(['dev2 dev1', 'dev3 dev4'])
       end
 
       it 'is out of sync if devices are in the wrong group' do
         multi_vdev.should = ['dev1 dev2', 'dev3 dev4']
         expect(multi_vdev).not_to be_safe_insync(['dev2 dev3', 'dev1 dev4'])
       end
     end
   end
 end