Tests using `usesDrawViewHierarchyInRect` are failing on 26.2 simulators

[TimofeiKarpovR]

Using usesDrawViewHierarchyInRect with the iOS 26.2 simulator results in a failing snapshot test with

failed - Snapshot comparison failed: "Images different"

and the following warning in the logs

CGBitmapContextInfoCreate: CGColorSpace which uses extended range requires floating point or CIF10 bitmap context

Demo app: https://github.com/TimofeiKarpovR/SnapshotTesting-color-space-issue-demo/

The failure occurs while creating the image context here: https://github.com/uber/ios-snapshot-test-case/blob/337a423d5245535129af274ad5198a97c4f47271/src/iOSSnapshotTestCaseCore/Categories/UIImage%2BCompare.m#L76

[TimofeiKarpovR]

After some investigation:

The reason of the error

drawViewHierarchyInRect now returns an image with an extended color range. Here is the difference between 26.0 and 26.2 simulators:

	26.0	26.2
Color space	kCGColorSpaceSRGB	kCGColorSpaceExtendedSRGB
Float components	NO	YES

Why imageContext creation fails, but referenceImageContext does not

UIImagePNGRepresentation modifies the original snapshot, removing the extended color range in the process:

	Original	Restored from file
Color space	kCGColorSpaceExtendedSRGB	kCGColorSpaceDisplayP3
Float components	YES	NO

This way, even if we try to support extended color ranges for the contexts in the comparison, they can still fail when comparing the modified reference image with the original one.

Possible solution

Configure the renderer so that it does not use the extended range explicitly.

    UIGraphicsImageRendererFormat *format = [UIGraphicsImageRendererFormat preferredFormat];
    format.scale = view.window.screen.scale;
    format.preferredRange = UIGraphicsImageRendererFormatRangeStandard;

    UIGraphicsImageRenderer *graphicsImageRenderer = [[UIGraphicsImageRenderer alloc] initWithSize:bounds.size
                                                                                            format:format];