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Perl Testing Consideration (seen from other languages)
This document summarizes a presentation on Perl testing from the perspective of other languages. It discusses different classifications of testing like the perspective (developer vs user), target (unit vs integration), technique (black box vs white box), and purpose (functional vs non-functional). It then reviews common Perl testing frameworks like Test::More and describes how Perl uses the TAP format. Finally, it compares Perl testing to Ruby/Rails testing and concludes Perl could improve its browser integration and mocking capabilities.
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Perl Testing Consideration (seen from other languages)
- 1. Perl Testing Consideration (seen from other languages) Masaki Nakagawa YAPC::Asia 2011 Tokyo (yapcasia.org/2011/talk/80) 2011 10 14
- 2. Profile • Masaki Nakagawa • @ikasam_a • metacpan.org/author/MASAKI • MC of Yokohama.pm (yokohama.pm.org) • github.com/masaki • socialbios.com/ikasam_a • “Pushing the Team B” 2011 10 14
- 3. Thank you ! ameblo.jp/yuki-kashiwagi-we/image-11002817849-11452563522.html 2011 10 14
- 4. Works • Embedded Development w/ C++ • WebApp. Development w/ Ruby • Project Management (small) • New Business Development • www.ricoh.co.jp/ucs/ • www.ricoh.co.jp/ucs/P3000/ 2011 10 14
- 5. Embedded Development • “Hardware Driven” • “The Waterfall” • Development Process • QA Process • Systematic Testing 2011 10 14
- 6. Classification of Testing Perspective Target How What 2011 10 14
- 7. Perspective Developer or User (Customer) • Developer Testing • Acceptance Testing 2011 10 14
- 8. Target One or More • Unit Testing • Integration Testing 2011 10 14
- 9. How Techniques for writing tests • Black Box Testing • White Box Testing 2011 10 14
- 10. What the Purpose of testing • Functional Testing • Non-Functional Testing • Performance / Stress / Usability / ... 2011 10 14
- 11. Testing Framework 1. Helping to write tests 2. Executing tests 3. Reporting test results 2011 10 14
- 12. Ruby Testing www.atmarkit.co.jp/fcoding/rails/articles/passionate/07/passionate07a.html survey.hamptoncatlin.com/survey/stats 2011 10 14
- 13. e.g.) RSpec 1. describe ... it ... 2. $ rspec ... 3. Spec::Runner::Formatter 2011 10 14
- 14. e.g.) Cucumber 1. Given ... When ... Then ... 2. $ cucumber ... 3. Cucumber::Formatter 2011 10 14
- 15. Many Frameworks 2011 10 14
- 16. Perl Testing 1. Test::More, Test::Class, Test::Base, Test::Spec, ... 2. $ prove ... (TAP::Harness) 3. TAP (TAP::Formatter) 2011 10 14
- 17. Perl has TAP 2011 10 14
- 18. TAP • testanything.org • “the Test Anything Protocol” • “is a simple text-based interface” 1..4 ok 1 - Input file opened not ok 2 - First line of the input valid ok 3 - Read the rest of the file not ok 4 - Summarized correctly # TODO Not written yet testanything.org/wiki/index.php/Main_Page 2011 10 14
- 19. Perl <3 TAP • From any test description • e.g.) Test::Class, Test::Base, Test::Spec • Convert results to non-TAP format • e.g.) TAP::Formatter::JUnit • Easy to write test helpers • e.g.) Test::Exception, Test::Deep, ... 2011 10 14
- 20. Rails Testing gihyo.jp/magazine/wdpress/archive/2011/vol61 2011 10 14
- 21. Rails Testing • Perspective • UnitTest, End-to-End • Frameworks • Test::Unit (+ Shoulda), RSpec, Cucumber • Browser Integration • Capybara (rack-test, Selenium, Envjs, ...) • Test Double • rspec-mocks, rr, WebMock 2011 10 14
- 22. Catalyst • Catalyst::Test • Test::WWW::Mechanize::Catalyst • Test::WWW::Selenium::Catalyst 2011 10 14
- 23. Plack • Plack::Test • Test::WWW::Mechanize::PSGI 2011 10 14
- 24. Browser Integration • WWW:: + WAF Customization • WWW::Mechanize • WWW::Selenium (Selenium-RC) • not yet for testing • WWW::HtmlUnit • Selenium::Remote::Driver (WebDriver) 2011 10 14
- 25. Test Double xunitpatterns.com/Test%20Double.html • Mock • Test::MockObject • Test::Mock::Recorder • Stub • Test::Mock::Guard • Test::Mock::LWP::Dispatch 2011 10 14
- 26. Test Double xunitpatterns.com/Test%20Double.html • Test::Double (under construction) • 0.01 released ! • metacpan.org/release/Test-Double • github.com/masaki/Test-Double • Mocks and Stubs • mock out w/ mocha style • stub out w/ rr style • Collaborators Welcome!!! 2011 10 14
- 27. Test Double xunitpatterns.com/Test%20Double.html • Spy • DBD::Mock • Fake • Test::mysqld • Test::TCP 2011 10 14
- 28. Descriptive Frameworks • Test::More • Test::Class (xUnit style) • Test::Declare / Test::More + “subtest” • Test::Spec (RSpec 1 compat.) • Test::Base (Parameterized Tests) • Test::Cukes / Test::BDD::Cucumber (Cucumber clone) 2011 10 14
- 29. Weakness • Expectation and Verification • vs. rr, rspec-mocks, mocha, ... • Browser Integration API • vs. Capybara, Webrat, ... • Naming of Test Double modules • Test::Mock::Guard is “Stub” module 2011 10 14
- 30. Comparision • Pros • TAP-based Test Description • Many Helpful Modules • Cons • Non-Uniform Browser Integration • Poor Expectation and Verification 2011 10 14
- 31. Conclusions • About Testing • 4 Classifications • 3 Elements in Frameworks • Perl and Ruby/Rails Testing Environments • Perl has TAP and Many Great Modules • Learn and Steal MORE from Ruby/Rails • Write More Descriptively 2011 10 14
- 32. Thank you! Questions? 2011 10 14