Remove force unwrap (#177)

Author: noahsmartin

DemoApp/DemoApp/TestViews/PreviewVariants.swift

@@ -69,6 +69,10 @@ extension NamedViewModifier {
     .init(name: "XXL Text Size", value: { $0.dynamicTypeSize(.xxxLarge) })
   }
 
+  @available(macOS, unavailable)
+  @available(watchOS, unavailable)
+  @available(visionOS, unavailable)
+  @available(tvOS, unavailable)
   static var accessibility: NamedViewModifier {
     .init(name: "Accessibility", value: { $0.emergeAccessibility(true) })
   }
@@ -81,6 +85,10 @@ extension NamedViewModifier {
 extension [NamedViewModifier] {
   /// The default named view modifiers in a ``PreviewVariants``.
   static var previewDefault: [NamedViewModifier] {
+    #if os(iOS)
     [.unmodified, .darkMode, .xxlTextSize, .rtl, .accessibility, .landscape]
+    #else
+    [.unmodified, .darkMode, .rtl]
+    #endif
   }
 }

DemoApp/DemoApp/TestViews/RideShareButton.swift

@@ -36,7 +36,9 @@ struct RideShareButtonView_Previews: PreviewProvider {
         .previewDisplayName("Ride Share Button View - Light")
         // This should never show as a diff
         .emergeSnapshotPrecision(0.0)
+      #if os(iOS)
         .emergeRenderingMode(.coreAnimation)
+      #endif
 
       RideShareButtonView(title: "Request Ride") {
           print("Button tapped")
@@ -52,7 +54,9 @@ struct RideShareButtonView_Previews: PreviewProvider {
       .previewLayout(.sizeThatFits)
       .padding()
       .previewDisplayName("Ride Share Button View - Light")
+      #if os(iOS)
       .emergeRenderingMode(.coreAnimation)
       .emergeAccessibility(true)
+      #endif
     }
 }

Sources/SnapshotPreferences/AccessibiltyPreference.swift

@@ -19,7 +19,10 @@ struct AccessibilityPreferenceKey: PreferenceKey {
 }
 
 extension View {
-  @available(iOS 15, *)
+  @available(macOS, unavailable)
+  @available(watchOS, unavailable)
+  @available(visionOS, unavailable)
+  @available(tvOS, unavailable)
   public func emergeAccessibility(_ enabled: Bool?) -> some View {
     preference(key: AccessibilityPreferenceKey.self, value: enabled)
   }

Sources/SnapshotPreferences/RenderingModePreference.swift

@@ -18,7 +18,10 @@ struct RenderingModePreferenceKey: PreferenceKey {
 }
 
 extension View {
-  @available(iOS 15, *)
+  @available(macOS, unavailable)
+  @available(watchOS, unavailable)
+  @available(visionOS, unavailable)
+  @available(tvOS, unavailable)
   public func emergeRenderingMode(_ renderingMode: EmergeRenderingMode?) -> some View {
     preference(key: RenderingModePreferenceKey.self, value: renderingMode?.rawValue)
   }

Sources/SnapshotPreviewsCore/AppKitRenderingStrategy.swift

@@ -133,7 +133,7 @@ final class AppKitContainer: NSHostingController<EmergeModifierView>, ScrollExpa
 
     if !supportsExpansion {
       // Reset the scroll point
-      (firstScrollView as! NSScrollView).documentView!.scroll(NSPoint(x: 0, y: 0))
+      (firstScrollView as? NSScrollView)?.documentView?.scroll(NSPoint(x: 0, y: 0))
     }
 
     updateHeight {