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path: root/spec/unit/plugins/shard_spec.rb
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#
# Author:: Davide Cavalca <dcavalca@fb.com>
# Copyright:: Copyright (c) 2016 Facebook
# 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 "digest/md5"
require_relative "../../spec_helper.rb"

describe Ohai::System, "shard plugin" do
  let(:plugin) { get_plugin("shard") }
  let(:fqdn) { "somehost004.someregion.somecompany.com" }
  let(:uuid) { "48555CF4-5BB1-21D9-BC4C-E8B73DDE5801" }
  let(:serial) { "234du3m4i498xdjr2" }
  let(:machine_id) { "0a1f869f457a4c8080ab19faf80af9cc" }
  let(:machinename) { "somehost004" }
  let(:fips) { false }

  subject do
    plugin.run
    plugin[:shard_seed]
  end

  before(:each) do
    allow(plugin).to receive(:collect_os).and_return(:linux)
    plugin["machinename"] = machinename
    plugin["machine_id"] = machine_id
    plugin["fqdn"] = fqdn
    plugin["dmi"] = { "system" => {} }
    plugin["dmi"]["system"]["uuid"] = uuid
    plugin["dmi"]["system"]["serial_number"] = serial
    plugin["fips"] = {"kernel" => {"enabled" => fips}}
    allow(plugin).to receive(:collect_os).and_return(:linux)
  end

  it "should provide a shard with a default-safe set of sources" do
    expect(subject).to eq(27767217)
  end

  it "should provide a shard with a configured source" do
    Ohai.config[:plugin][:shard_seed][:sources] = [:fqdn]
    expect(subject).to eq(203669792)
  end

  it "fails on an unrecognized source" do
    Ohai.config[:plugin][:shard_seed][:sources] = [:GreatGooglyMoogly]
    expect { subject }.to raise_error(RuntimeError)
  end

  it "should provide a shard with a configured algorithm" do
    Ohai.config[:plugin][:shard_seed][:digest_algorithm] = "sha256"
      expect(Digest::MD5).to_not receive(:new)
      expect(subject).to eq(117055036)
  end

  context "with FIPS mode enabled" do
    let(:fips) { true }

    it "should use SHA2" do
      expect(Digest::MD5).to_not receive(:new)
      expect(subject).to eq(117055036)
    end
  end
end