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without running the app itself. An integration test (also
called end-to-end testing or GUI testing) runs the full app.Hosts and targetsDuring development, you are probably writing the code
on a desktop computer, called the host machine,
and running the app on a mobile device, browser,
or desktop application, called the target device.
(If you are using a web
browser or desktop application,
the host machine is also the target device.)integration_testTests written with the integration_test package can:Migrating from flutter_driverExisting projects using flutter_driver can be migrated to
integration_test by following the Migrating from flutter_drive
guide.<topic_end>
<topic_start>
Project setup
Add integration_test and flutter_test to your pubspec.yaml file:In your project, create a new directory
integration_test with a new file, <name>_test.dart:
<code_start>import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:how_to/main.dart';
import 'package:integration_test/integration_test.dart';
void main() {
testWidgets('tap on the floating action button, verify counter',
(tester) async {
// Load app widget.
await tester.pumpWidget(const MyApp());
// Verify the counter starts at 0.
expect(find.text('0'), findsOneWidget);
// Finds the floating action button to tap on.
final fab = find.byKey(const Key('increment'));
// Emulate a tap on the floating action button.
await tester.tap(fab);
// Trigger a frame.
await tester.pumpAndSettle();
// Verify the counter increments by 1.
expect(find.text('0'), findsNothing);
expect(find.text('1'), findsOneWidget);
});
}<code_end>
info Note
Only use testWidgets to declare your tests.
Otherwise, Flutter could report errors incorrectly.If you are looking for more examples, take a look at the testing_app of
the samples repository.<topic_end>
<topic_start>
Directory structure
See also:<topic_end>
<topic_start>
Running using the flutter command
These tests can be launched with the
flutter test command, where <DEVICE_ID>:
is the optional device ID or pattern displayed
in the output of the flutter devices command:This runs the tests in foo_test.dart. To run all tests in this directory on
the default device, run:<topic_end>
<topic_start>
Running in a browser
Download and install ChromeDriver
and run it on port 4444:To run tests with flutter drive, create a new directory containing a new file,
test_driver/integration_test.dart:
<code_start>import 'package:integration_test/integration_test_driver.dart';
Future<void> main() => integrationDriver();<code_end>
Then add IntegrationTestWidgetsFlutterBinding.ensureInitialized() in your
integration_test/<name>_test.dart file:
<code_start>import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:how_to/main.dart';
import 'package:integration_test/integration_test.dart';
void main() {
IntegrationTestWidgetsFlutterBinding.ensureInitialized(); // NEW
testWidgets('tap on the floating action button, verify counter',
(tester) async {
// Load app widget.
await tester.pumpWidget(const MyApp());
// Verify the counter starts at 0.
expect(find.text('0'), findsOneWidget);
// Finds the floating action button to tap on.
final fab = find.byKey(const Key('increment'));
// Emulate a tap on the floating action button.
await tester.tap(fab);
// Trigger a frame.
await tester.pumpAndSettle();
// Verify the counter increments by 1.
expect(find.text('0'), findsNothing);
expect(find.text('1'), findsOneWidget);
});
}<code_end>
In a separate process, run flutter_drive:To learn more, see the
Running Flutter driver tests with web wiki page.<topic_end>
<topic_start>
Testing on Firebase Test Lab
You can use the Firebase Test Lab with both Android
and iOS targets.<topic_end>
<topic_start>
Android setup
Follow the instructions in the Android Device Testing
section of the README.<topic_end>
<topic_start>
iOS setup
Follow the instructions in the iOS Device Testing
section of the README.<topic_end>
<topic_start>
Test Lab project setup
Go to the Firebase Console,
and create a new project if you don’t have one