我如何为伪事实编写规范测试?

Question

我有以下rb脚本，它根据安装的包生成木偶事实，并且在我的木偶环境中似乎工作得很好:

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

我写了下面的规范，它运行一个小的虚拟测试，看看我的rspec环境是否正常:

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_64n')
        Facter.fact(:bs_rpm_ts3_hostt01).value.should == "1.0.0-34"
    end
end

但是当运行rake spec时，我得到以下错误:

[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_64n')
     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]$

我做错了什么，或者可能错过了没有加载因子::核心??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)

检查我的测试系统后，我注意到因子gem缺少核心，所以我更新了代码和测试如下:

包现在:

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

和存根在我的测试现在是:

Facter::Util::Resolution.stubs(:exec).with('rpm -qa | grep ^ts').returns('ts3_hostt01-1.0.0-34.x86_64n')

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]$

我在测试中做错了什么?

Answer 1

查看因子代码，这是您需要的文件:

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

它不需要核心/执行本身…在不深入研究的情况下，您可以在spec_helper:

中尝试一下吗?

require 'facter/core/execution'