dev/benchmarks/test_apps/stocks/test/locale_test.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter_test/flutter_test.dart';
import 'package:stocks/main.dart' as stocks;
import 'package:stocks/stock_data.dart' as stock_data;

void main() {
  stock_data.StockData.actuallyFetchData = false;

  testWidgets('Changing locale', (WidgetTester tester) async {
    stocks.main();
    await tester.pump();
    // The initial test app's locale is "_", so we're seeing the fallback translation here.
    expect(find.text('MARKET'), findsOneWidget);
    await tester.binding.setLocale('es', '');

    // The localized strings have finished loading and dependent
    // widgets have been updated.
    await tester.pump();
    expect(find.text('MERCADO'), findsOneWidget);
  });
}