Bug 236196 – Adjust `platformResetStateToConsistentValues` to avoid grabbing the general pasteboard when possible

• Component: Tools / Tests
• Status: RESOLVED FIXED

[Wenson Hsieh]

Make it possible to work around rdar://86327357 by skipping layout tests that time out.

[Wenson Hsieh]

Created attachment 451024 [details]
Patch

[Wenson Hsieh]

Comment on attachment 451024 [details]
Patch

Thanks for the review!

[EWS]

Committed r289169 (246865@main): <https://commits.webkit.org/246865@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 451024 [details].

[Radar WebKit Bug Importer]

<rdar://problem/88544615>

[Alexey Proskuryakov]

It's great to limit the damage like this.

Are the pasteboardChanged notifications synchronous? A little concerned if this adds more races to the execution.

[Wenson Hsieh]

(In reply to Alexey Proskuryakov from comment #5)
> It's great to limit the damage like this.
> 
> Are the pasteboardChanged notifications synchronous? A little concerned if
> this adds more races to the execution.

Indeed they are! (I verified this in a separate test app that calls `-[UIPasteboard setItemProviders:]` and listens for this notification, with logging statements):

```
- (void)viewDidLoad
{
    [super viewDidLoad];

    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(pasteboardChanged:) name:UIPasteboardChangedNotification object:nil];

    __auto_type pasteboard = [UIPasteboard generalPasteboard];
    __auto_type string = [[NSAttributedString alloc] initWithString:@"hello world"];
    __auto_type itemProvider = [[NSItemProvider alloc] initWithObject:string];

    NSLog(@"%@ change count before: %tu", pasteboard, pasteboard.changeCount);
    [pasteboard setItemProviders:@[ itemProvider ]];
    NSLog(@"%@ change count after: %tu", pasteboard, pasteboard.changeCount);
}

- (void)pasteboardChanged:(NSNotification *)notification
{
    NSLog(@"Pasteboard changed!");
}
```

with output:

```
UIPasteboardTest[25500:1935953] <_UIConcretePasteboard: 0x6000026604c0> change count before: 20398
UIPasteboardTest[25500:1935953] Pasteboard changed!
UIPasteboardTest[25500:1935953] <_UIConcretePasteboard: 0x6000026604c0> change count after: 20399
```