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SeleniumCamp 2015 Andrii Soldatenko
This document discusses high performance functional testing based on Selenium. It begins with an introduction of the speaker and outlines a testing pyramid with unit, integration and functional/UI tests. It then demonstrates how to automate functional tests for web applications using Selenium and discusses techniques for decreasing test execution time, including using Selenium Grid, PhantomJS, HTTP requests instead of Selenium, and parallel test execution. The document emphasizes that faster tests allow for faster development and provides approaches and tools to reduce test bottlenecks and optimize test execution time.
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SeleniumCamp 2015 Andrii Soldatenko
- 1. High performance Functional tests basedon Selenium Andrii Soldatenko 27-28 February 2015 @a_soldatenko
- 2. About me: • LeadQA Automation Engineer at • Backend Python Developer at • Speaker at PyCon Ukraine 2014 • Speaker at PyCon Belarus 2015 • @a_soldatenko
- 3. "Tests are the Programmer’s stone, transmutingfear into boredom."
- 4. We don’t havetime for tests
- 5. Test Automation Pyramid from http://martinfowler.com/bliki/TestPyramid.html
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- 8. Functional or UItests
- 9. How to automate Functionaltests for Web?
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- 11. What is Test ExecutionTime? • Faster Tests Mean Faster Development • Slow Tests Don’t Get Run as Often
- 12. How to calculatetest execution time
- 13. How to decreasetest execution time? “Man is a tool-using animal. Without tools he is nothing, with tools he is all.“ - Thomas Carlyle
- 14. xUnit in Python parallel execution plugins native test coverage unittestNO NO NO YES YES YES YES YES NO
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- 18. How to setup SeleniumGrid locally
- 19. Add Selenium Grid supportto tests
- 20. Selenium Grid + Concurrenttest execution Node Node Node Hub OR
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- 22. Selenium Grid inCloud
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- 29. Using http Requests insteadof Selenium
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- 31. Approach Execution Time % num processes Selenium WebDriver 22.76sec 100% 1 Selenium + py.test 9.24 sec 40% 4 Selenium + PhantomJS 15.55 sec 68% 1 Selenium + PhantomJS 9.98 sec 43% 4 Selenium + PhantomJS + Requests 10.9 sec 47% 1 Selenium + PhantomJS + Requests 6.1 sec 26% 4
- 32. “Premature optimization isthe root of all evil” - Donald Knuth
- 33. How to findbottlenecks in functional tests?
- 34. Final Thoughts • Don’ttest constants • Avoid double-testing functionality • Try to test behavior rather than implementation • Use Continuous Integration • Slow tests kill productivity • Use explicit rather than implicit waits and wait pattern
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