[Webkit-unassigned] [Bug 217005] New: [WebGL2] Add extension availability tests

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=217005

            Bug ID: 217005
           Summary: [WebGL2] Add extension availability tests
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: WebGL
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: kbr at google.com
                CC: dino at apple.com, jdarpinian at chromium.org,
                    kkinnunen at apple.com
            Blocks: 126404

In order to ensure that WebKit advertises the expected WebGL 1.0 and 2.0 extensions - and doesn't silently regress - it's necessary to add some layout tests verifying this.

The difficulty is that the advertised extensions differ from GPU to GPU, not just from platform to platform. TestExpectations can't currently suppress failures based on the GPU type on the system.

In Slack discussions, dino@ suggests to add an Internals method to either:

- Query the GPU type
- Query the expected extensions for the current platform
- Enable the WEBGL_debug_renderer_info extension and determine extension availability inside the test based on the result

or similar.


Referenced Bugs:

https://bugs.webkit.org/show_bug.cgi?id=126404
[Bug 126404] WebGL 2 support
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