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Add Messaging to Diffing Force Unwrap #860

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Add Messaging to Diffing Force Unwrap #860

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9 changes: 8 additions & 1 deletion Sources/SnapshotTesting/Snapshotting/UIImage.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -29,7 +29,14 @@

return Diffing(
toData: { $0.pngData() ?? emptyImage().pngData()! },
fromData: { UIImage(data: $0, scale: imageScale)! }
fromData: {
guard let image = UIImage(data: $0, scale: imageScale) else {
fatalError(
"Unable to load image from data on file for snapshot diffing. Check the contents of the image file. Projects using `git lfs` for file storage may need to run `git lfs pull`."
)
}
return image
}
) { old, new in
guard
let message = compare(
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