Chef - 使用 Test Kitchen 测试 Cookbook

Test Kitchen 是 Chef 的集成测试框架。它允许编写测试，这些测试在虚拟机实例化并使用 Cookbook 收敛后运行。测试在虚拟机上运行，可以验证一切是否按预期工作。

这是 ChefSpec 的节点契约，ChefSpec 仅模拟 Chef 运行。Test Kitchen 启动一个真实的节点并在其上运行 Chef。

设置

为了做到这一点，我们需要在机器上安装 Vagrant，它有助于管理虚拟机。然后，我们需要安装 Bookshelf 并将其与 Vagrant 连接，以便管理 Cookbook 依赖项。

步骤 1 - 编辑 Cookbook 中的默认菜谱。

vipin@laptop:~/chef-repo $ subl cookbooks/<Cookbook Name>/recipes/default.rb 
file "/tmp/greeting.txt" do 
   content node['my_cookbook']['greeting'] 
end

步骤 2 - 编辑 Cookbook 属性。

vipin@laptop:~/chef-repo $ subl cookbooks/<Cookbook Name>/attributes/default.rb 
default['my_cookbook']['greeting'] = "Ohai, Chefs!"

步骤 3 - 编辑 gem 文件以安装必要的 Ruby gem。

vipin@laptop:~/chef-repo $ subl Gemfile 
gem 'test-kitchen', '~> 2.0.0.alpha.7' 
gem 'kitchen-vagrant'

步骤 4 - 安装必要的 Ruby gem。

vipin@laptop:~/chef-repo $ bundle install 
...TRUNCATED OUTPUT... 
Installing test-kitchen (1.0.0.alpha.7) 
Installing kitchen-vagrant (0.10.0) ...TRUNCATED OUTPUT...

步骤 5 - 在 Cookbook 中创建 .kitchen.yml 文件。

vipin@laptop:~/chef-repo/cookbooks/my_cookbook $ subl .kitchen.yml 
--- 
driver_plugin: vagrant 
driver_config: 
   require_chef_omnibus: true  
platforms: 
   - name: ubuntu-12.04 
  driver_config: 
      box: opscode-ubuntu-12.04 
      box_url: 
         https://opscode-vm.s3.amazonaws.com/vagrant/
            opscode_ubuntu12.04_provisionerless.box  
suites: 
   - name: default 
   run_list: 
      - recipe[minitest-handler] 
      - recipe[my_cookbook_test] 
attributes: { my_cookbook: { greeting: 'Ohai, Minitest!'} }

步骤 6 - 在 Cookbook 中创建测试目录。

vipin@laptop:~/chef-repo/cookbooks/<Cookbook Name>$ mkdir test

步骤 7 - 为集成测试创建一个测试 Cookbook。

vipin@laptop:~/chef-repo/cookbooks/<Cookbook Name>/test $ knife 
cookbook create my_cookbook_test 
** Creating cookbook my_cookbook_test 
** Creating README for cookbook: my_cookbook_test 
** Creating CHANGELOG for cookbook: my_cookbook_test 
** Creating metadata for cookbook: my_cookbook_test

步骤 8 - 编辑测试 Cookbook 的默认菜谱。

vipin@laptop:~/chef-repo/cookbooks/my_cookbook $ subl 
test/cookbooks/my_cookbook_test/recipes/default.rb 
include_recipe 'my_cookbook::default'

步骤 9 - 在 Cookbook 中创建 Minitest Spec。

vipin@laptop:~/chef-repo/cookbooks/my_cookbook $ mkdir -p 
   test/cookbooks/my_cookbook_test/files/default/tests/minitest  

vipin@laptop:~/chef-repo/cookbooks/my_cookbook $ subl 
   test/cookbooks/my_cookbook_test/files/default/tests/minitest/default_test.rb  

require 'minitest/spec'  
describe_recipe 'my_cookbook::default' do 
   describe "greeting file" do 
      it "creates the greeting file" do 
         file("/tmp/greeting.txt").must_exist 
      end 
       
      it "contains what's stored in the 'greeting' node 
         attribute" do 
         file('/tmp/greeting.txt').must_include 'Ohai, Minitest!' 
      end 
end

步骤 10 - 编辑主 Cookbook 的 Berksfile。

vipin@laptop:~/chef-repo/cookbooks/my_cookbook $ subl Berksfile 
site :opscode 
metadata 
cookbook "apt" 
cookbook "minitest-handler" 
cookbook "my_cookbook_test", path: 
"./test/cookbooks/my_cookbook_test"

测试设置

vipin@laptop:~/chef-repo/cookbooks/my_cookbook $ kitchen test 
-----> Starting Kitchen (v1.0.0.alpha.7) 
...TRUNCATED OUTPUT... 
-----> Converging <default-ubuntu-1204> 
-----> Installing Chef Omnibus (true) 
...TRUNCATED OUTPUT... 
Starting Chef Client, version 11.4.4 
[2013-06-29T18:33:57+00:00] INFO: *** Chef 11.4.4 *** 
[2013-06-29T18:33:58+00:00] INFO: Setting the run_list to 
["recipe[minitest-handler]", "recipe[my_cookbook_test]"] 
from JSON 
...TRUNCATED OUTPUT... 
# Running tests: 
recipe::my_cookbook::default::greeting 
file#test_0001_creates the greeting file = 0.00 s = . 
recipe::my_cookbook::default::greeting 
file#test_0002_contains what's stored in the 'greeting' 
node attribute = 0.00 s = . 
Finished tests in 0.011190s, 178.7277 tests/s, 178.7277 
assertions/s. 
2 tests, 2 assertions, 0 failures, 0 errors, 0 skips 
...TRUNCATED OUTPUT...  
-----> Kitchen is finished. (2m5.69s)

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