add tests for SendConfirmationPage

test/features/send/send_confirmation_page_test.dart

@@ -0,0 +1,35 @@
+import 'package:didpay/features/send/send_confirmation_page.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import '../../helpers/widget_helpers.dart';
+
+void main() {
+  group('SendConfirmationPage', () {
+    testWidgets('should show sending payment', (tester) async {
+      await tester.runAsync(() async {
+        await tester.pumpWidget(
+          WidgetHelpers.testableWidget(
+            child: const SendConfirmationPage(did: '', amount: ''),
+          ),
+        );
+
+        expect(find.text('Sending payment...'), findsOneWidget);
+        expect(find.byType(CircularProgressIndicator), findsOneWidget);
+      });
+    });
+
+    testWidgets('should show payment was sent', (tester) async {
+      await tester.pumpWidget(
+        WidgetHelpers.testableWidget(
+          child: const SendConfirmationPage(did: '', amount: ''),
+        ),
+      );
+
+      await tester.pumpAndSettle();
+
+      expect(find.text('Your payment was sent!'), findsOneWidget);
+      expect(find.byIcon(Icons.check_circle), findsOneWidget);
+    });
+  });
+}