Update documentation for running Flutter Integration tests with Chrome (

#1408)

app/integration_test/README.md

@@ -111,24 +111,9 @@ For more information about running Android Device Testing for Flutter integratio
 
 ### Web
 
-_Note: The integration tests are not working for the web at the moment because we need to migrate our app to null safety. Otherwise, the build will fail because of this message:_
-
-```
-org-dartlang-app:/app_test.dart:27:11: Error: Non-nullable variable 'dependencies' must be assigned before it can be used.
-    await dependencies.blocDependencies.auth.signOut();
-          ^^^^^^^^^^^^
-org-dartlang-app:/app_test.dart:34:30: Error: Non-nullable variable 'dependencies' must be assigned before it can be used.
-          beitrittsversuche: dependencies.beitrittsversuche,
-                             ^^^^^^^^^^^^
-org-dartlang-app:/app_test.dart:35:29: Error: Non-nullable variable 'dependencies' must be assigned before it can be used.
-          blocDependencies: dependencies.blocDependencies,
-                            ^^^^^^^^^^^^
-org-dartlang-app:/app_test.dart:36:28: Error: Non-nullable variable 'dependencies' must be assigned before it can be used.
-          dynamicLinkBloc: dependencies.dynamicLinkBloc,
-                           ^^^^^^^^^^^^
-```
-
-To get started testing in a web browser, download [ChromeDriver](https://chromedriver.chromium.org/downloads).
+To get started testing in a web browser, download
+[ChromeDriver](https://chromedriver.chromium.org/downloads). You need have the
+same version of ChromeDriver as the version of Chrome you have installed.
 
 Launch WebDriver, for example:
 
@@ -139,8 +124,15 @@ chromedriver --port=4444
 And then run the following command in a different process:
 
 ```sh
-fvm flutter test \
-  integration_test
-  --flavor dev
-  -d web-server
+fvm flutter drive \
+   --driver=test_driver/integration_test.dart \
+   --target=integration_test/integration_test_old.dart \
+   --flavor dev \
+   --dart-define=USER_1_EMAIL=$USER_1_EMAIL \
+   --dart-define=USER_1_PASSWORD=$USER_1_PASSWORD \
+   -d chrome
 ```
+
+For more information about running Flutter integration tests on the web, check
+out the official Flutter repository documentation:
+https://github.com/flutter/flutter/wiki/Running-Flutter-Driver-tests-with-Web