Add unit test for group normalization in ChefFS
user
```ruby
#
# Author:: Ryan Cragun (<ryan@getchef.com>)
# Copyright:: Copyright (c) 2014 Opscode, Inc.
# License:: Apache License, Version 2.0
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

require 'spec_helper'
require 'lib/chef/chef_fs/data_handler/group_data_handler'

class TestEntry < Mash
  attr_accessor :name, :org

  def initialize(name, org)
    @name = name
    @org = org
  end
end

describe Chef::ChefFS::DataHandler::GroupDataHandler do
  describe '#normalize_for_post' do
    let(:entry) do
      TestEntry.new('workers.json', 'hive')
    end

    let(:group) do
      { 'name' => 'worker_bees',
        'clients' => %w(honey sting),
        'users' => %w(fizz buzz),
        'actors' => %w(honey)
      }
    end

    let(:normalized) do
      { 'actors' =>
          { 'users' => %w(fizz buzz),
            'clients'=> %w(honey sting),
            'groups'=> []
          },
        'groupname' => 'workers',
        'name' => 'worker_bees',
        'orgname' => 'hive'
      }
    end

    let(:handler) { described_class.new }

    it 'normalizes the users, clients and groups into actors' do
      expect(handler.normalize_for_post(group, entry)).to eq(normalized)
    end
  end
end
```
assistant