WP8 Critical Developer Practices for Delivering Outstanding AppsStefan WickPrincipal Test ManagerWindows Phone Developer Platform

Crash AnalysisUnit TestingMemory & PerformanceWorld ReadyWP7 WP8 Upgrade

Agenda

App Crash Analysis

Ways to track your crashes:Dev Center crash reports3rd party analytics productsRoll your own “Little Watson”

Common reasons for crashes:WebExceptionOutOfMemoryExceptionFormatException

App Crash Analysis

DevCenter Crash ReportsDemo

Unit Testing

Test Framework now in the ToolkitAvailable for WP7 and WP8Why automated tests?Structured quality controlPrevent regressionsTest more configurations in less time

Build a “suite of pain” for your app

Unit Test Framework

Unit TestingFocus on:• Overview of the framework• Write a new regression test

Demo

Memory & Performance

Make your good app GREATProfile for memory and executionLeverage Store Test Kit

Attend Oren Nachman’s perf talk (WPH312)

Profiling Tools

Memory & Performance

Monitor your apps mem usageMemory caps are enforced!Test with real world dataMonitor your heavy objects

A single UI control leak can cause the entire visual tree to be leaked !

Design with memory in mind!

Memory Considerations

Memory ProfilerFocus on:• Finding and fixing memory

leaks

Demo

Building World Ready Apps

Test for common coding mistakesRun tests on various localesTest with international input

Consider localizing your app contentWP8 & VS 2012 Tools make this easier

Increase reach and rating for your app!

World Ready Apps

World ReadyFocus on:• Globalization testing• Localization development

Demo

Upgrading from WP7 to WP8

WP7 apps run on WP8 as is“quirks mode” shim is enabled

Feature light-upLate-bind to enable WP8 light-up scenarios

Upgrade app version to 8.0Take full advantage of all new features and improvements

Find the upgrade path that is right for your app

Moving from WP7 to WP8

Upgrade guidance on MSDNBreaking changesDifferent screen sizesNew visuals for controls

Retest all code after upgradeInvestment in Unit Tests will pay off

Upgrading the source project to 8.0 disables the app compat shim

Binary vs. Source compat

Different approachesone app project with two configurationstwo app projects with shared librariestwo branches of the same app project

Maintain both 7.1 and 8.0 versions of your app, from shared code

Code Sharing

Upgrading to WP8Focus on:• Upgrade process & breaking

changes• Code sharing

Demo

Crashes are fixedUnit tests for regression controlMemory/performance improvedApp ready for the worldApp ready for Windows Phone 8

Recap

Ratings & Reviews after this talk

Recap

“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”

ResourcesWP8 Performance & OptimizationThu 10:15 – 11:15| 92 Magellan

Windows Phone Toolkithttp://silverlight.codeplex.com

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