QA/Firefox 4/Test Plan/RetainedLayers

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Retained Layers

Area Details
Development Status: In progress
Feature Testing: In progress (planning)
Team: Developer: roc, QA: marcia
Tracking Bugs Bug bug 564991 - Retain layers and layer contents

Feature Description

Layers are another API we are designing for Mozilla, which can be used to hardware accelerate certain parts of website rendering.

Feature Release Readiness Assessment

The table below provides a top level go/no go assessment of whether the feature is release ready for the given milestone.

Milestone Assessment
#Beta1 N/A
#Beta2 N/A
#Beta3 N/A


Feature Documentation

Item Description Status
#Project_Wiki Wiki Links to all feature related entries
#Developer_Links (blogs) Developer links to feature related sites
#Other_Docs Web links to feature related sites
#Developer_QA_Review Details from developer and qa discussions regarding feature test strategies and issues.


Feature Bug Management

Item Description Status
#Bug_Tracking Top level bugs tracking feature
#Bug_Verification Feature bugs that need verification
#Bug_Triage Links triage bug tasks


Feature Test Items

The table below provides a breakdown of all feature items that should be covered and how they will be tested. Not all items will be covered by internal QA team members. It is important to list what should be covered. If it is not covered, list it as not covered.

Note: not all items listed below will apply for a given feature

Test Item Description Covered By Status
Item 1 Item 1 Description Developer Tests
Item 2 Item 2 Description Beta tester exposure
#Localization Feature localization
#Accessibility Feature accessibility
#Plugins Plugins compatibility
#Addons Addons compatibility
#Topsites Top internet sites compatibilities


Feature Tests

Automated Tests

Item Description Status
#Developer_Tests Links to automated developer tests
#Mozmill_Tests Links to automated mozmill feature test cases

Manual Tests

Item Description Status
#Smoke_Tests link to smoke tests
#Regression_Tests link to BFT and/or regression tests
#Functional_Tests link to FFT and/or complete functional tests


Community Test Events

Item Description Status
#Testdays Links to test day event results for feature
#Bugdays Links to bug day event results for feature
#Meetups Links to Meetup events for feature


Feature Documentation Details

Project Wiki

  • Provide link to all project related wikis


Developer Links


Other Docs

  • Provide links to all feature related developer links to blogs and other internet sites


Developer QA Review

The QA person responsible for the feature should hold a formal interview with the lead developer or feature champion. Below are questions that should be asked in the interview:

  • Do we have automated tests for the feature?

Yes, reftests test retained layers.

  • What do they cover?

Almost all rendering except the stuff listed below.

  • What do they not cover?

Reftests don't check that windowed plugins are drawn properly. They also don't check for flicker during scrolling or other dynamic activity. They don't check scrolling or general rendering performance.

  • How well do they cover the feature?

Very well, other than the above.

  • What are the important areas we should focus on?
    • Scrolling --- speed and flicker-freedom
    • General rendering performance --- especially small updates (e.g. typing into textareas) in large complicated pages
    • Rendering of windowed plugins, especially when scrolling
  • What are the dependencies?


  • What is our comfort level with this feature in its current state?

Various people have been testing the retained layer patches for a while now. We've found some bugs, but it seems to work pretty well so far.

  • What feedback would you like from QA?

See above. I'm especially worried about regressions in interactive performance.


Feature Release Readiness Assessment Details




Feature Bug Management Details

Bug Tracking

  • Top level bugs tracking feature. Include any relevant bug queries that are helpful for tracking feature status.
Query Name Description
bugzilla query url link query description


Bug Verification

  • Feature bugs that need verification


Bug Triage

  • Bug triage information


Feature Test Items Details


  • Details of feature localization test requirements



  • Details of feature accessibility test requirements



  • Details of plugins compatibility test requirements



  • Details of addons compatibility



  • Details of top internet sites test requirements


Feature Tests Details

Automated Tests Details

Developer Tests

  • Links to automated developer tests


Mozmill Tests

If a particular feature needs manual tests which should also be covered by Mozmill tests please add the "[mozmill-test-needed]" whiteboard entry to the feature implementation or regression bug.

List of Mozmill Tests:

  • Links to automated mozmill feature test cases


Manual Tests Details


  • links to litmus smoke tests or description



  • links to litmus BFT and/or regression tests description



  • links to litmus FFT and/or complete functional tests description


Community Test Events Details


  • Links to test day event results for feature


  • Links to bug day event results for feature


  • Links to Meetup events for feature