我该如何编写关于tests事实的规格测试？

Question

我有以下rb脚本，该脚本根据所安装的软件包生成fact事实，并且在我的p环境中似乎正常运行：

begin
pack = Facter::Core::Execution.execute('rpm -qa | grep ^ts')
packages = pack.split("\n")
packagehash = Hash.new
packages.each do |f|
    packagehash[f.split("-")[0]] = f.split("-")[1] + ("-") + f.split("-")[2].split(".")[0]
end
rescue
end

begin
unless packagehash.empty?
    packagehash.each_pair do |k,v|
        Facter.add("bs_rpm_#{k}") {
            setcode { "#{v}" }
        }
    end
end
rescue
end

我编写了以下规范，该规范运行一个小型虚拟测试，以查看我的rspec env总体而言是否还可以：

require 'spec_helper'

describe 'bs package spec' do
    before do
        Facter.fact(:kernel).stubs(:value).returns("windows")
    end

    it "should run windows" do
        Facter.fact(:kernel).value.should == "windows"
    end

    it "should create new facts" do
        Facter::Core::Execution.stubs(:execute).with('rpm -qa | grep ^ts').returns('ts3_hostt01-1.0.0-34.x86_64\n')
        Facter.fact(:bs_rpm_ts3_hostt01).value.should == "1.0.0-34"
    end
end

但是然后在运行rake spec时，出现以下错误：

[dan@kyvltvm00022 bs_master]$ rake spec
/home/dan/.rvm/rubies/ruby-2.1.0/bin/ruby -S rspec spec/unit/facter/bs_package_spec.rb --color
.F

Failures:

  1) bs package spec should create new facts
     Failure/Error: Facter::Core::Execution.stubs(:execute).with('rpm -qa | grep ^ts').returns('ts3_hostt01-1.0.0-34.x86_64\n')
     NameError:
       uninitialized constant Facter::Core
     # ./spec/unit/facter/bs_package_spec.rb:13:in `block (2 levels) in <top (required)>'

Finished in 0.00692 seconds
2 examples, 1 failure

Failed examples:

rspec ./spec/unit/facter/bs_package_spec.rb:12 # bs package spec should create new facts
/home/dan/.rvm/rubies/ruby-2.1.0/bin/ruby -S rspec spec/unit/facter/bs_package_spec.rb --color failed
[dan@kyvltvm00022 bs_master]$ exit

shell returned 1

[dan@kyvltvm00022 bs_master]$

我在做什么错或未加载Facter :: Core可能会丢失？ 我的spec_helper看起来像这样：

 [dan@kyvltvm00022 bs_master]$ cat spec/spec_helper.rb
dir = File.expand_path(File.dirname(__FILE__))
$LOAD_PATH.unshift File.join(dir, 'lib')

# Don't want puppet getting the command line arguments for rake or autotest
ARGV.clear

require 'puppet'
require 'facter'
require 'mocha'
gem 'rspec', '>=2.0.0'
require 'rspec/expectations'

require 'puppetlabs_spec_helper/puppet_spec_helper'

RSpec.configure do |config|
  # FIXME REVISIT - We may want to delegate to Facter like we do in
  # Puppet::PuppetSpecInitializer.initialize_via_testhelper(config) because
  # this behavior is a duplication of the spec_helper in Facter.
  config.before :each do
    # Ensure that we don't accidentally cache facts and environment between
    # test cases.  This requires each example group to explicitly load the
    # facts being exercised with something like
    # Facter.collection.loader.load(:ipaddress)
    Facter::Util::Loader.any_instance.stubs(:load_all)
    Facter.clear
    Facter.clear_messages
  end
end
[dan@kyvltvm00022 bs_master]$

[更新]

在检查了我的测试系统之后，我发现事实宝石缺少核心，因此我更新了代码并进行了如下测试：

包现在是：

pack = Facter::Util::Resolution.exec('rpm -qa | grep ^ts')

现在我测试中的存根是：

Facter::Util::Resolution.stubs(:exec).with('rpm -qa | grep ^ts').returns('ts3_hostt01-1.0.0-34.x86_64\n')

现在的结果是：

[dan@kyvltvm00022 bs_master]$ rake spec
/home/dan/.rvm/rubies/ruby-2.1.0/bin/ruby -S rspec spec/unit/facter/bs_package_spec.rb --color
.F

Failures:

  1) bs package spec should create new facts
     Failure/Error: Facter.fact(:bs_rpm_ts3_hostt01).value.should == "1.0.0-34"
     NoMethodError:
       undefined method `value' for nil:NilClass
     # ./spec/unit/facter/bs_package_spec.rb:14:in `block (2 levels) in <top (required)>'

Finished in 0.00747 seconds
2 examples, 1 failure

Failed examples:

rspec ./spec/unit/facter/bs_package_spec.rb:12 # bs package spec should create new facts
/home/dan/.rvm/rubies/ruby-2.1.0/bin/ruby -S rspec spec/unit/facter/bs_package_spec.rb --color failed
[dan@kyvltvm00022 bs_master]$

我的考试做错了什么？

Answer 1

查看事实代码，这是您需要的文件：

https://github.com/puppetlabs/facter/blob/master/lib/facter.rb

它本身不需要核心/执行……不需进一步研究，您可以在spec_helper中尝试一下吗：

require 'facter/core/execution'