2014-11-14 - Why Test Driven Development (TDD) Works for Sysadmins @ LISA14
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This document contains information about testing infrastructure with Puppet including advocating for test-driven development, examples of Puppet testing code using rspec, and steps for a test-driven workflow of writing tests first, then code to pass tests, and refactoring. It also includes examples using ping and curl for monitoring servers and includes contact information for Garrett Honeycutt who runs the learn Puppet website.
2014-11-14 - Why Test Driven Development (TDD) Works for Sysadmins @ LISA14
- 1. Garrett Honeycutt gh@learnpuppet.com learnpuppet.com @learnpuppet Garrett Honeycutt gh@learnpuppet.com learnpuppet.com @learnpuppet
- 4. TDD?
- 5. Why Test?
- 8. DEVELOPERS! DEVELOPERS! DEVELOPERS! DEVELOPERS! DEVELOPERS! DEVELOPERS! DEVELOPERS! DEVELOPERS! DEVELOPERS! DEVELOPERS!
- 17. Why Test First?
- 24. What to Test?
- 28. Tooling
- 38. require 'spec_helper' ! describe package('httpd') do it { should be_installed } end ! describe service('httpd') do it { should be_enabled } it { should be_running } end ! describe port(80) do it { should be_listening } end
- 39. $ rake spec ! Package "httpd" should be installed ! Service "httpd" should be enabled should be running ! Port "80" should be listening ! 4 examples, 0 failures
- 43. Monitoring
- 45. $ ping -c1 example.com PING example.com (93.184.216.119): 56 data bytes 64 bytes from 93.184.216.119: icmp_seq=0 ttl=58 time=4.947 ms ! --- example.com ping statistics --- 1 packets transmitted, 1 packets received, 0.0% packet loss round-trip min/avg/max/stddev = 4.947/4.947/4.947/0.000 ms
- 46. $ curl example.com -I HTTP/1.1 200 OK Accept-Ranges: bytes Cache-Control: max-age=604800 Content-Type: text/html Date: Thu, 13 Nov 2014 03:52:15 GMT Etag: "359670651" Expires: Thu, 20 Nov 2014 03:52:15 GMT Last-Modified: Fri, 09 Aug 2013 23:54:35 GMT Server: ECS (pae/3796) X-Cache: HIT x-ec-custom-error: 1 Content-Length: 1270
- 48. write tests (which fail)
- 49. just enough code to pass
- 50. refactor
- 51. Garrett Honeycutt gh@learnpuppet.com learnpuppet.com @learnpuppet