Perils of Page-Object Pattern
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PERILS OF PAGE-OBJECT PATTERN Anand Bagmar Test Practice Lead 1
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Page-Object pattern is very commonly used when implementing Automation frameworks. However, as the scale of the framework grows, there is a limitation on how much reusability really happens. It inherently becomes very difficult to separate the test intent from the business domain. I talk about this problem, and the solution I have been using - Business Layer - Page-Object pattern, which has helped me keep my code DRY. For more details (links to slides, etc.), see my blog: http://goo.gl/biRn4n
Transcript of Perils of Page-Object Pattern
PERILS OF PAGE-OBJECT PATTERN
Anand Bagmar
Test Practice Lead 1
@BagmarAnand
about.me/anand.bagmar
ABOUT ME
WHAT DO YOU EXPECT FROM THIS SESSION?
What is Test Automation?
Automation – A Safety Net
Case Study
START OF AN AUTOMATION FRAMEWORK
Code sample - #1
WILL THIS WORK? WHAT PROBLEMS EXIST?
Order out of Chaos!
WHAT IS A PATTERN?
WHY PAGE OBJECT? WHAT IS IT?
Model pages in code
Simulates user actions
One place change
Reduces code duplication
Snippets of page
AUTOMATION FRAMEWORK WITH PAGE OBJECTS
Code sample - #2
If you keep the Automation Framework Principles and
Practices in mind …
PRINCIPLES FOR A TEST AUTOMATION FRAMEWORK
Code quality
Design Patterns
Abstraction Layers
Refactor, Evolve & Extend
Pairing
PRACTICES FOR A TEST AUTOMATION FRAMEWORK
Configurable
No Copy-Paste
Continuous Integration (CI)
Test Data
Tools & Utilities - Logging - Screenshots - Video
AUTOMATION FRAMEWORK WITH PAGE OBJECTS
Code sample - #3
APPLICABLE FOR
TIPS
Especially in Data / Locator heavy pages Ø No getters / setters
Ø Logical grouping
Ø Handle waits
LIMITATIONS OF PAGE-OBJECT PATTERN
Test intent gets polluted Duplication of Test intent & implementation Intent becomes Imperative Maintenance challenges Scaling challenges
Manual / Exploratory UI
Web Service
View
JavaScript
Integration
Unit
Time
Value
Cost
IDEAL TEST AUTOMATION PYRAMID
Business-facing Tests
Technology-facing Tests
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BUSINESS-LAYER PAGE-OBJECT PATTERN
Code sample - #4
ADVANTAGES
Validate what is important - Business requirements Test Pyramid remains sane Abstraction layers allow separation-of-concerns Changes are isolated Maintenance & Scaling becomes ‘easier’
Advantages of Business-Layer
Page-Object Pattern
TEST AUTOMATION FRAMEWORK BEST PRACTICES
Assertions & Validations In Business Layer
Model Test Data
Proper abstraction layers
Pages as Dummy objects
Evolve
Programming practices
OOPs Design Patterns
Identify intent in business terminology
Build Tools & Utilities
REFERENCES
Page Objects – Google
https://code.google.com/p/selenium/wiki/PageObjects
Page Objects – Martin Fowler
http://martinfowler.com/bliki/PageObject.html
Test Design Consideration
http://docs.seleniumhq.org/docs/06_test_design_considerations.jsp
