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Nurhan Turgut
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[web] adding a test for e2e web testing. (#2554)
* adding a test for e2e web testing. * chaning the changelog. updating pubspec.yaml version. fixing analyze * merging the changelog * addressing reviewer comments * fix format. addressing reviewer comments * try to run chromedriver on the backend * chrome driver is was running as the main task, preventing test from running . use background_task to run it. use ENV for directory change * change in scripts. remove list from backfround task. change argument of driver * removed background task. it wasn't using the same path * run web tests only on browser * add test on to the web driver test as well. drive-examples are still failing * fix the imports * trying reviever suggestion for drive_example compile errors * test _ imports * Revert "test _ imports" This reverts commit 7cf24d6. * removing the web_test driver file upon reviewers suggestion * format fix
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‎.cirrus.yml‎

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dockerfile: .ci/Dockerfile
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cpu: 8
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memory: 16G
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env:
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E2E_PATH: "./packages/e2e"
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upgrade_script:
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- flutter channel stable
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- flutter upgrade
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- if [[ "$CHANNEL" -eq "stable" ]]; then find . | grep _web$ | xargs rm -rf; fi
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- flutter channel $CHANNEL
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- ./script/build_all_plugins_app.sh apk
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- name: e2e_web_smoke_test
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# Tests e2e example test in web.
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only_if: "changesInclude('.cirrus.yml', 'packages/e2e/**') || $CIRRUS_PR == ''"
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install_script:
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- flutter config --enable-web
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- git clone https://github.com/flutter/web_installers.git
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- cd web_installers/packages/web_drivers/
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- pub get
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- dart lib/web_driver_installer.dart chromedriver --install-only
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- ./chromedriver/chromedriver --port=4444 &
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test_script:
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- cd $E2E_PATH/example/
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- flutter drive -v --target=test_driver/example_e2e.dart -d web-server --release --browser-name=chrome
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- name: build-apks+java-test+firebase-test-lab
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env:
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matrix:

‎packages/e2e/CHANGELOG.md‎

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## 0.2.4+4
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* Fixed a hang that occurred on platforms that don't have a `MethodChannel` listener registered..
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## 0.2.4+3
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* Fixed code snippet in the readme under the "Using Flutter driver to run tests" section.

‎packages/e2e/README.md‎

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flutter drive --driver=test_driver/<package_name>_test.dart test/<package_name>_e2e.dart
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```
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You can run tests on web on release mode.
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First you need to make sure you have downloaded the driver for the browser.
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```
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cd example
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flutter drive -v --target=test_driver/<package_name>dart -d web-server --release --browser-name=chrome
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```
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## Android device testing
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Create an instrumentation test file in your application's

‎packages/e2e/example/lib/main.dart‎

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import 'dart:io' show Platform;
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import 'package:flutter/material.dart';
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import 'my_app.dart' if (dart.library.html) 'my_web_app.dart';
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// ignore_for_file: public_member_api_docs
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void main() => runApp(MyApp());
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class MyApp extends StatefulWidget {
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@override
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_MyAppState createState() => _MyAppState();
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}
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class _MyAppState extends State<MyApp> {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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appBar: AppBar(
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title: const Text('Plugin example app'),
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),
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body: Center(
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child: Text('Platform: ${Platform.operatingSystem}\n'),
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),
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),
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);
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}
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}
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void main() => startApp();

‎packages/e2e/example/lib/my_app.dart‎

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import 'dart:io' show Platform;
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import 'package:flutter/material.dart';
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// ignore_for_file: public_member_api_docs
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void startApp() => runApp(MyApp());
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class MyApp extends StatefulWidget {
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@override
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_MyAppState createState() => _MyAppState();
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}
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class _MyAppState extends State<MyApp> {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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appBar: AppBar(
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title: const Text('Plugin example app'),
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),
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body: Center(
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child: Text('Platform: ${Platform.operatingSystem}\n'),
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),
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),
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);
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}
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}

‎packages/e2e/example/lib/my_web_app.dart‎

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import 'dart:html' as html;
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import 'package:flutter/material.dart';
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// ignore_for_file: public_member_api_docs
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void startApp() => runApp(MyWebApp());
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class MyWebApp extends StatefulWidget {
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@override
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_MyWebAppState createState() => _MyWebAppState();
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}
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class _MyWebAppState extends State<MyWebApp> {
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@override
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Widget build(BuildContext context) {
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return MaterialApp(
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home: Scaffold(
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appBar: AppBar(
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title: const Text('Plugin example app'),
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),
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body: Center(
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key: Key('mainapp'),
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child: Text('Platform: ${html.window.navigator.platform}\n'),
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),
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),
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);
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}
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}

‎packages/e2e/example/test_driver/example_e2e.dart‎

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// gestures. You can also use WidgetTester to find child widgets in the widget
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// tree, read text, and verify that the values of widget properties are correct.
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import 'dart:io' show Platform;
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:e2e/e2e.dart';
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import 'package:e2e_example/main.dart';
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import 'example_e2e_io.dart' if (dart.library.html) 'example_e2e_web.dart'
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as tests;
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void main() {
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E2EWidgetsFlutterBinding.ensureInitialized();
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testWidgets('verify text', (WidgetTester tester) async {
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// Build our app and trigger a frame.
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await tester.pumpWidget(MyApp());
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// Verify that platform version is retrieved.
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expect(
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find.byWidgetPredicate(
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(Widget widget) =>
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widget is Text &&
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widget.data.startsWith('Platform: ${Platform.operatingSystem}'),
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),
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findsOneWidget,
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);
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});
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tests.main();
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}

‎packages/e2e/example/test_driver/example_e2e_io.dart‎

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// This is a basic Flutter widget test.
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//
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// To perform an interaction with a widget in your test, use the WidgetTester
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// utility that Flutter provides. For example, you can send tap and scroll
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// gestures. You can also use WidgetTester to find child widgets in the widget
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// tree, read text, and verify that the values of widget properties are correct.
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import 'dart:io' show Platform;
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:e2e/e2e.dart';
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import 'package:e2e_example/main.dart' as app;
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void main() {
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E2EWidgetsFlutterBinding.ensureInitialized();
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testWidgets('verify text', (WidgetTester tester) async {
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// Build our app and trigger a frame.
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app.main();
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// Trigger a frame.
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await tester.pumpAndSettle();
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// Verify that platform version is retrieved.
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expect(
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find.byWidgetPredicate(
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(Widget widget) =>
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widget is Text &&
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widget.data.startsWith('Platform: ${Platform.operatingSystem}'),
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),
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findsOneWidget,
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);
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});
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}

‎packages/e2e/example/test_driver/example_e2e_web.dart‎

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// This is a basic Flutter widget test.
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//
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// To perform an interaction with a widget in your test, use the WidgetTester
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// utility that Flutter provides. For example, you can send tap and scroll
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// gestures. You can also use WidgetTester to find child widgets in the widget
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// tree, read text, and verify that the values of widget properties are correct.
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import 'dart:html' as html;
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import 'package:flutter/material.dart';
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import 'package:flutter_test/flutter_test.dart';
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import 'package:e2e/e2e.dart';
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import 'package:e2e_example/main.dart' as app;
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void main() {
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E2EWidgetsFlutterBinding.ensureInitialized();
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testWidgets('verify text', (WidgetTester tester) async {
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// Build our app and trigger a frame.
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app.main();
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// Trigger a frame.
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await tester.pumpAndSettle();
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// Verify that platform is retrieved.
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expect(
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find.byWidgetPredicate(
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(Widget widget) =>
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widget is Text &&
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widget.data
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.startsWith('Platform: ${html.window.navigator.platform}\n'),
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),
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findsOneWidget,
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);
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});
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}

‎packages/e2e/example/test_driver/failure.dart‎

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import 'package:flutter_test/flutter_test.dart';
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import 'package:e2e/e2e.dart';
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import 'package:e2e_example/main.dart';
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import 'package:e2e_example/main.dart' as app;
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// Tests the failure behavior of the E2EWidgetsFlutterBinding
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//
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testWidgets('failure 1', (WidgetTester tester) async {
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// Build our app and trigger a frame.
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await tester.pumpWidget(MyApp());
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app.main();
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// Verify that platform version is retrieved.
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expect(
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await expectLater(
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find.byWidgetPredicate(
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(Widget widget) =>
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widget is Text && widget.data.startsWith('This should fail'),

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