I have used that a few times with -runStyle Manual (e.g. -runStyle Manual:3 
and you open the given URL in Firefox, Chrome and Internet Explorer)
That said, I haven't used it much so I don't really care; but you'll have 
to make sure you update the ManualRunStyle when removing that feature.
I think HtmlUnitRunStyle also supports it (e.g. -runStyle 
HtmlUnit:FF17,IE9,Chrome)

On Tuesday, February 25, 2014 8:44:00 PM UTC+1, Goktug Gokdogan wrote:
>
> I have been doing some ongoing work to do simplifications on the testing 
> infra and one of my important goals is to have a simpler contract with 
> tests and test drivers. This is important for maintaining the infra as we 
> are really having hard time to understand the code.
>
> I was able to delete plenty of code earlier and now I hit another 
> 'feature' that's not used at all in Google and GWT-SDK itself. This is 
> ability to run the tests in multiple browsers together in parallel. There 
> is plenty of infrastructure code to support this use case. This requires 
> browsers to start in sync together via the driver and then the tests get 
> executed together. In Google side we never used this feature (at least in 
> our newer infrastructure) and doesn't look like it will be used for several 
> reasons:
>
> 1. Running tests together will the flakiness dramatically as at least will 
> be more likely to fail.
> 2. Some of the speed gains will be lost anyway due to sync-start of 
> browsers.
> 3. We usually use testfarms instead of GWT test infra to launch and drive 
> browsers. As you can't really run many different browser in single machine 
> and I expect that's quite common for other developers as well if they run 
> multi-browser tests. In such cases it is even more complication to do such 
> integration.
> 4. Last and not the least; not even sure if it is working properly.
>
> So with the motto of "simpler is better", I'm going to get rid of the code 
> but first would like to see if anybody strongly depends on this feature.
>
>  - Goktug
>

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