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Support taking snapshots in light and dark mode #125

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Support taking snapshots in light and dark mode #125

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569a2fd
Support taking snapshots in light and dark mode
steve509 Apr 18, 2020
a5b642a
Mark method as available for iOS 13 and above
steve509 Apr 21, 2020
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34 changes: 34 additions & 0 deletions src/iOSSnapshotTestCase/SwiftSupport.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -31,6 +31,40 @@ public extension FBSnapshotTestCase {
FBSnapshotVerifyViewOrLayer(layer, identifier: identifier, suffixes: suffixes, perPixelTolerance: perPixelTolerance, overallTolerance: overallTolerance, file: file, line: line)
}

@available(iOS 13, *)
func FBSnapshotVerifyViewForLightDarkMode(_ view: UIView, identifier: String? = nil, delay: TimeInterval = 0, perPixelTolerance: CGFloat = 0, overallTolerance: CGFloat = 0, file: StaticString = #file, line: UInt = #line) {
let viewController = UIViewController()
viewController.view.addSubview(view)

FBSnapshotVerifyViewControllerForLightDarkMode(viewController, identifier: identifier, delay: delay, perPixelTolerance: perPixelTolerance, overallTolerance: overallTolerance, file: file, line: line)
}

@available(iOS 13, *)
func FBSnapshotVerifyViewControllerForLightDarkMode(_ viewController: UIViewController, identifier: String? = nil, delay: TimeInterval = 0, perPixelTolerance: CGFloat = 0, overallTolerance: CGFloat = 0, file: StaticString = #file, line: UInt = #line) {
let navigationController = UINavigationController(rootViewController: viewController)
let window = UIWindow()
window.rootViewController = navigationController
window.makeKeyAndVisible()

// Take snapshot in light mode
navigationController.overrideUserInterfaceStyle = .light
RunLoop.main.run(until: Date(timeIntervalSinceNow: delay))

let lightId = [identifier, "light"].compactMap { $0 }.joined(separator: "_")
FBSnapshotVerifyView(navigationController.view, identifier: lightId, suffixes: ["Light"], perPixelTolerance: 0, overallTolerance: 0, file: file, line: line)

// Take snapshot in dark mode
window.rootViewController = nil
window.rootViewController = navigationController
navigationController.overrideUserInterfaceStyle = .dark
RunLoop.main.run(until: Date(timeIntervalSinceNow: delay))

let darkId = [identifier, "dark"].compactMap { $0 }.joined(separator: "_")
FBSnapshotVerifyView(navigationController.view, identifier: darkId, suffixes: ["Dark"], perPixelTolerance: 0, overallTolerance: 0, file: file, line: line)

window.rootViewController = nil
}

private func FBSnapshotVerifyViewOrLayer(_ viewOrLayer: AnyObject, identifier: String? = nil, suffixes: NSOrderedSet = FBSnapshotTestCaseDefaultSuffixes(), perPixelTolerance: CGFloat = 0, overallTolerance: CGFloat = 0, file: StaticString = #file, line: UInt = #line) {
let envReferenceImageDirectory = self.getReferenceImageDirectory(withDefault: nil)
let envImageDiffDirectory = self.getImageDiffDirectory(withDefault: nil)
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