[webkit-dev] Isolated world tests

[Oliver Hunt]

I have realised that the point i really wanted to make is that
  * Isolated worlds would be a webkit feature
  * WebKit features should be tested in the webkit test suite
  * All tests in webkit should pass in JavaScriptCore as that is  
webkit's javascript engine.

--Oliver

On Jul 1, 2009, at 10:59 PM, Adam Barth wrote:

> On Wed, Jul 1, 2009 at 7:50 PM, Maciej Stachowiak<mjs at apple.com>  
> wrote:
>> We generally wouldn't accept WebKit features that only work with  
>> V8, even if
>> other ports may not immediately plan to use them.
>
> I support this principle.
>
>> I haven't thought through whether this particular feature
>> should be an exception.
>
> The main arguments are as follows:
>
> 1) Isolated worlds is not a web platform feature.  Adding the feature
> to V8 and not to JSC does not create an incompatibility between the
> two engines.  The observable behavior from web content is the same.
>
> 2) The purpose of implementing isolated worlds is so the app can
> implement an app-specific feature (extensions).  Implementing
> extensions in another app requires a lot more than just isolated
> worlds.
>
> 3) I don't foresee the implementation touching any source files
> outside of WebCore/bindings/v8.  Other ports do not need to bear any
> costs because of isolated worlds.
>
>> In general, I think using regression tests for features that are not
>> directly exposed to Web content, but implemented in WebCore/WebKit,  
>> is
>> reasonable. For example we have tests that check that WebKit's  
>> delegate
>> methods relating to load progress are dispatched in the correct  
>> order.
>
> Perhaps I've been indoctrinated into the cult, but I wouldn't want to
> work on something without writing tests.
>
> Adam
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