Build exchange workspace and shared transaction services (#28)

frontend/app/test/verification_test.dart

@@ -2,9 +2,12 @@ import 'package:flutter/material.dart';
 
 import 'package:flutter_test/flutter_test.dart';
 
+import 'package:provider/provider.dart';
+
 import 'package:sxchnge_auth/sxchnge_auth.dart';
 
 import 'package:sxchnge_app/main.dart';
+import 'package:sxchnge_app/providers/locale.dart';
 
 class RecoveringService implements VerificationService {
   int sends = 0;
@@ -120,16 +123,10 @@ void main() {
       addTearDown(tester.platformDispatcher.clearTextScaleFactorTestValue);
       await openVerification(tester, route);
       expect(tester.takeException(), isNull);
-      await tester.tap(find.byKey(const ValueKey('locale-selector')));
+      final element = tester.element(find.byType(Scaffold).first);
+      await element.read<LocaleProvider>().setLocale(const Locale('ru'));
       await tester.pumpAndSettle();
-      await tester.tap(
-        find.ancestor(
-          of: find.text('Русский'),
-          matching: find.byType(CheckedPopupMenuItem<Locale>),
-        ),
-      );
-      await tester.pumpAndSettle();
-      expect(find.text('RU'), findsOneWidget);
+      expect(find.byKey(const ValueKey('locale-selector')), findsNothing);
       expect(tester.takeException(), isNull);
     });
   }