add first test driver

example/pubspec.yaml

@@ -16,6 +16,9 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  flutter_driver:
+    sdk: flutter
+  test: any
 
 flutter:
   uses-material-design: true

example/test_driver/single_conversation.dart

@@ -0,0 +1,9 @@
+import 'package:flutter_driver/driver_extension.dart';
+
+import '../lib/single_conversation.dart' as app;
+
+void main() async {
+  enableFlutterDriverExtension();
+
+  await app.main();
+}

example/test_driver/single_conversation_test.dart

@@ -0,0 +1,46 @@
+import 'dart:io';
+
+import 'package:flutter_driver/flutter_driver.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('Single conversation', () async {
+    final inputFinder = find.byValueKey('messageInputText');
+    final sendButtonFinder = find.byValueKey('sendButton');
+    final messageListViewFinder = find.byValueKey('messageListView');
+
+    FlutterDriver driver = await FlutterDriver.connect();
+    // Connect to the Flutter driver before running any tests.
+
+    await sleep(Duration(seconds: 5));
+
+    await driver.waitFor(inputFinder);
+
+    await driver.tap(inputFinder);
+
+    await sleep(Duration(seconds: 1));
+
+    await driver.enterText('hey');
+
+    await sleep(Duration(seconds: 1));
+
+    await driver.tap(sendButtonFinder);
+
+    await sleep(Duration(seconds: 1));
+
+    await driver.scroll(
+      messageListViewFinder,
+      0,
+      2000,
+      Duration(seconds: 1),
+    );
+
+    await sleep(Duration(seconds: 1));
+
+    // Close the connection to the driver after the tests have completed.
+    await sleep(Duration(seconds: 5));
+    if (driver != null) {
+      await driver.close();
+    }
+  });
+}

lib/src/message_input.dart

@@ -132,6 +132,7 @@ class _MessageInputState extends State<MessageInput> {
   Expanded _buildTextInput(BuildContext context) {
     return Expanded(
       child: TextField(
+        key: Key('messageInputText'),
         minLines: null,
         maxLines: null,
         onSubmitted: (_) {
@@ -524,6 +525,7 @@ class _MessageInputState extends State<MessageInput> {
         ),
         color: Colors.transparent,
         child: IconButton(
+          key: Key('sendButton'),
           onPressed: () {
             _sendMessage(context);
           },

lib/src/message_list_view.dart

@@ -108,6 +108,7 @@ class _MessageListViewState extends State<MessageListView> {
         return true;
       },
       child: ListView.custom(
+        key: Key('messageListView'),
         physics: AlwaysScrollableScrollPhysics(),
         controller: _scrollController,
         reverse: true,