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WP8 Critical Developer Practices for Delivering Outstanding Apps

WP8 Critical Developer Practices for Delivering Outstanding Apps. Stefan Wick Principal Test Manager Windows Phone Developer Platform. Agenda. Crash Analysis Unit Testing Memory & Performance World Ready WP7  WP8 Upgrade. App Crash Analysis. App Crash Analysis.

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WP8 Critical Developer Practices for Delivering Outstanding Apps

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  1. WP8 Critical Developer Practices for Delivering Outstanding Apps Stefan Wick Principal Test Manager Windows Phone Developer Platform

  2. Agenda • Crash Analysis • Unit Testing • Memory & Performance • World Ready • WP7  WP8 Upgrade

  3. App Crash Analysis

  4. App Crash Analysis • Ways to track your crashes: • Dev Center crash reports • 3rd party analytics products • Roll your own “Little Watson” • Common reasons for crashes: • WebException • OutOfMemoryException • FormatException

  5. Demo • DevCenter Crash Reports

  6. Unit Testing

  7. Unit Test Framework • Build a “suite of pain” for your app • Test Framework now in the Toolkit • Available for WP7 and WP8 • Why automated tests? • Structured quality control • Prevent regressions • Test more configurations in less time

  8. Demo • Unit Testing • Focus on: • Overview of the framework • Write a new regression test

  9. Memory & Performance

  10. Memory & Performance • Profiling Tools • Make your good app GREAT • Profile for memory and execution • Leverage Store Test Kit • Attend Oren Nachman’sperf talk (WPH312)

  11. Memory Considerations • Design with memory in mind! • Monitor your apps mem usage • Memory caps are enforced! • Test with real world data • Monitor your heavy objects • A single UI control leak can cause the entire visual tree to be leaked !

  12. Demo • Memory Profiler • Focus on: • Finding and fixing memory leaks

  13. Building World Ready Apps

  14. World Ready Apps • Increase reach and rating for your app! • Test for common coding mistakes • Run tests on various locales • Test with international input • Consider localizing your app content • WP8 & VS 2012 Tools make this easier

  15. Demo • World Ready • Focus on: • Globalization testing • Localization development

  16. Upgrading from WP7 to WP8

  17. Moving from WP7 to WP8 • Find the upgrade path that is right for your app • WP7 apps run on WP8 as is • “quirks mode” shim is enabled • Feature light-up • Late-bind to enable WP8 light-up scenarios • Upgrade app version to 8.0 • Take full advantage of all new features and improvements

  18. Binary vs. Source compat • Upgrading the source project to 8.0 disables the app compat shim • Upgrade guidance on MSDN • Breaking changes • Different screen sizes • New visuals for controls • Retest all code after upgrade • Investment in Unit Tests will pay off 

  19. Code Sharing • Maintain both 7.1 and 8.0 versions of your app, from shared code • Different approaches • one app project with two configurations • two app projects with shared libraries • two branches of the same app project

  20. Demo • Upgrading to WP8 • Focus on: • Upgrade process & breaking changes • Code sharing

  21. Recap • Crashes are fixed • Unit tests for regression control • Memory/performance improved • App ready for the world • App ready for Windows Phone 8

  22. Recap • Ratings & Reviews after this talk • “Works great as advertised. Smooth and reliable. Only thing missing is feature xyz ….” • “Thanks for localizing to my native language” • “It’s even better now on my new Lumia 920”

  23. Resources WP8 Performance & Optimization Thu 10:15 – 11:15| 92 Magellan Windows Phone Toolkithttp://silverlight.codeplex.com

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