feat: add ApplePayButtonType.continue_ support on iOS 15.0+

pay_ios/ios/pay_ios/Sources/pay_ios/ApplePayButtonView.swift

@@ -204,6 +204,9 @@ extension PKPaymentButtonType {
         return .contribute
       case "tip":
         return .tip
+      case "continue":
+        guard #available(iOS 15.0, *) else { return nil }
+        return .continue
       default:
         return nil
       }

pay_ios/lib/src/widgets/apple_pay_button.dart

@@ -34,7 +34,8 @@ enum ApplePayButtonType {
   rent,
   support,
   contribute,
-  tip
+  tip,
+  continue_
 }
 
 /// The button styles supported on Apple Pay.
@@ -198,6 +199,7 @@ extension on ApplePayButtonType {
         ApplePayButtonType.support: 'support',
         ApplePayButtonType.contribute: 'contribute',
         ApplePayButtonType.tip: 'tip',
+        ApplePayButtonType.continue_: 'continue',
       }[this]!;
 }
 

pay_ios/test/pay_button_test.dart

@@ -59,5 +59,24 @@ void main() {
       );
       debugDefaultTargetPlatformOverride = null;
     });
+
+    testWidgets('maps ApplePayButtonType.continue_ to "continue"',
+        (WidgetTester tester) async {
+      await tester.pumpWidget(Directionality(
+        textDirection: TextDirection.ltr,
+        child: RawApplePayButton(
+          type: ApplePayButtonType.continue_,
+          onPressed: () {},
+        ),
+      ));
+
+      expect(
+          find.byWidgetPredicate((widget) =>
+              widget is UiKitView &&
+              widget.creationParams['type'] == 'continue'),
+          findsOneWidget);
+
+      debugDefaultTargetPlatformOverride = null;
+    });
   });
 }