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Messaging App Initial Commit

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Pages Already Implemented Login and Registeration Page
This commit is contained in:
onasanya.lanre
2025-01-01 00:35:25 +00:00
commit 8ec33980c6
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README.md
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# messaging_app
A chat app built using Flutter for Both iOS and Android.
Backend is being covered by Appwrite. It is opensource and can be selfhosted, which is the main reason for using is a backend.
analysis_options.yaml
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# This file configures the analyzer, which statically analyzes Dart code to
# check for errors, warnings, and lints.
#
# The issues identified by the analyzer are surfaced in the UI of Dart-enabled
# IDEs (https://dart.dev/tools#ides-and-editors). The analyzer can also be
# invoked from the command line by running `flutter analyze`.
# The following line activates a set of recommended lints for Flutter apps,
# packages, and plugins designed to encourage good coding practices.
include: package:flutter_lints/flutter.yaml
linter:
# The lint rules applied to this project can be customized in the
# section below to disable rules from the `package:flutter_lints/flutter.yaml`
# included above or to enable additional rules. A list of all available lints
# and their documentation is published at https://dart.dev/lints.
#
# Instead of disabling a lint rule for the entire project in the
# section below, it can also be suppressed for a single line of code
# or a specific dart file by using the `// ignore: name_of_lint` and
# `// ignore_for_file: name_of_lint` syntax on the line or in the file
# producing the lint.
rules:
# avoid_print: false # Uncomment to disable the `avoid_print` rule
# prefer_single_quotes: true # Uncomment to enable the `prefer_single_quotes` rule
# Additional information about this file can be found at
# https://dart.dev/guides/language/analysis-options
lib/components/constants.dart
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//const endPoint = 'http://10.15.45.11/v1';
const endPoint = 'https://api.theonasanyas.com/v1';
const projectId = 'chatapp';
const selfSigned = false;
const databaseId = '676d7bc5000ffc9ca2a4';
const userCollectionId = '676d7d05000253c91d27';
const chatsCollectionId = '67734e8b002936f64abd';
const convCollectionId = '67734e7f00205b8f40a6';
const imageStorageBucket = '6771b9000011f84c14fa';
lib/components/messaging_provider.dart
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import 'dart:io';
import 'package:appwrite/appwrite.dart';
import 'package:appwrite/models.dart' as models;
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:messaging_app/components/constants.dart';
import 'package:messaging_app/service/navigation_service.dart';
import 'package:messaging_app/service/snackbar_service.dart';
enum AuthStatus {
notAuthenticated,
authenticated,
authenticating,
userNotFound,
error,
}
class MessagingProviders extends ChangeNotifier {
//
Client client = Client();
late final Account account;
late final Databases database;
late final Storage storage;
// Auth Status
AuthStatus? status;
//User Details
models.User? user;
models.Session? session;
// var _email;
// var _name;
// var _imageURL;
// var _timeStamp;
static MessagingProviders instance = MessagingProviders();
MessagingProviders() {
init();
loadUser();
}
init() {
client.setEndpoint(endPoint).setProject(projectId).setSelfSigned();
account = Account(client);
database = Databases(client);
storage = Storage(client);
}
loadUser() async {
try {
user = await account.get();
status = AuthStatus.authenticated;
} catch (e) {
status = AuthStatus.notAuthenticated;
} finally {
notifyListeners();
}
}
void loginWithEmailAndPassword(String _email, String _password) async {
//
status = AuthStatus.authenticating;
notifyListeners();
try {
session = await account.createEmailPasswordSession(
email: _email, password: _password);
// user = await account.get();
status = AuthStatus.authenticated;
SnackBarService.instance.showSnackBarSuccess("Welcome! ${user!.name}");
NavigationService.instance.navigateToReplacement("home");
// account.deleteSession(sessionId: 'current');
} on AppwriteException catch (e) {
SnackBarService.instance.showSnackBarError(e.message!);
status = AuthStatus.error;
user = null;
//
} on Exception catch (e) {
SnackBarService.instance.showSnackBarError(e.toString());
//
}
notifyListeners();
}
Future<void> createUser(String _email, String _password,
Future<void> onSuccess(String _uid)) async {
try {
models.User _user = await account.create(
userId: ID.unique(), email: _email, password: _password);
status = AuthStatus.authenticated;
await onSuccess(_user.$id);
SnackBarService.instance.showSnackBarSuccess("Welcome! ${_user.email}");
NavigationService.instance.goBack();
NavigationService.instance.navigateToReplacement("home");
} on AppwriteException catch (e) {
status = AuthStatus.error;
user = null;
SnackBarService.instance.showSnackBarError(e.message!);
} on Exception catch (e) {
SnackBarService.instance.showSnackBarError(e.toString());
//
}
notifyListeners();
}
Future<void> createUserInDB(
String _documentId, String _email, String _name, String _imageURL) async {
try {
await database.createDocument(
databaseId: databaseId,
collectionId: userCollectionId,
documentId: _documentId,
data: {
"name": _name,
"email": _email,
"timeStamp": DateTime.now().toUtc().toIso8601String(),
"image": _imageURL
});
status = AuthStatus.authenticated;
} on AppwriteException catch (e) {
SnackBarService.instance.showSnackBarError(e.message!);
//
} on Exception catch (e) {
SnackBarService.instance.showSnackBarError(e.toString());
//
}
notifyListeners();
}
uploadUserImage(XFile? file, String _uid) async {
try {
File _file = File(file!.path);
var _test = await storage.createFile(
bucketId: imageStorageBucket,
fileId: ID.unique(),
file: InputFile.fromPath(path: _file.path, filename: file.name),
permissions: [
Permission.read(Role.any()),
],
);
return "$endPoint/storage/buckets/${_test.bucketId}/files/${_test.$id}/view?project=$projectId";
} on AppwriteException catch (e) {
SnackBarService.instance.showSnackBarError(e.message!);
print(e.message);
//
} on Exception catch (e) {
SnackBarService.instance.showSnackBarError(e.toString());
//
}
notifyListeners();
}
}
lib/components/messaging_routes.dart
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import 'package:flutter/material.dart';
import 'package:messaging_app/pages/home_page.dart';
import 'package:messaging_app/pages/login_page.dart';
import 'package:messaging_app/pages/registeration_page.dart';
class MessagingRoutes {
//
static MessagingRoutes instance = MessagingRoutes();
Map<String, WidgetBuilder> get messagingRoutes {
return {
"login": (BuildContext _context) => LoginPage(),
"register": (BuildContext _context) => RegisterationPage(),
"home": (BuildContext _context) => HomePage(),
};
}
}
lib/main.dart
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import 'package:flutter/material.dart';
import 'package:messaging_app/components/messaging_routes.dart';
import 'package:messaging_app/service/navigation_service.dart';
void main() {
WidgetsFlutterBinding.ensureInitialized();
runApp(const MessagingApp());
}
class MessagingApp extends StatelessWidget {
const MessagingApp({super.key});
// This widget is the root of your application.
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Messaging App',
navigatorKey: NavigationService.instance.navigatorKey,
theme: ThemeData(
brightness: Brightness.dark,
scaffoldBackgroundColor: Colors.black,
primaryColor: Color.fromRGBO(42, 117, 188, 1.0),
colorScheme: ColorScheme.dark(),
useMaterial3: true,
),
routes: MessagingRoutes.instance.messagingRoutes,
initialRoute: "login",
// home: RegisterationPage(),
);
}
}
lib/pages/home_page.dart
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import 'package:flutter/material.dart';
class HomePage extends StatefulWidget {
const HomePage({super.key});
@override
State<StatefulWidget> createState() {
//
return _HomePageState();
}
}
class _HomePageState extends State<HomePage> {
@override
Widget build(BuildContext context) {
//
return Scaffold(
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
appBar: AppBar(
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
title: Text("Messaging App"),
titleTextStyle: TextStyle(fontSize: 15),
),
);
}
}
lib/pages/login_page.dart
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import 'package:flutter/material.dart';
import 'package:messaging_app/components/messaging_provider.dart';
import 'package:messaging_app/service/navigation_service.dart';
import 'package:messaging_app/service/snackbar_service.dart';
import 'package:provider/provider.dart';
class LoginPage extends StatefulWidget {
const LoginPage({super.key});
@override
State<StatefulWidget> createState() {
return _LoginPageState();
}
}
class _LoginPageState extends State<LoginPage> {
//
var _deviceHeight;
var _deviceWidth;
String? _email;
String? _password;
late GlobalKey<FormState> _formKey;
late MessagingProviders _auth;
_LoginPageState() {
_formKey = GlobalKey<FormState>();
}
@override
Widget build(BuildContext context) {
//
_deviceHeight = MediaQuery.of(context).size.height;
_deviceWidth = MediaQuery.of(context).size.width;
return Scaffold(
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
body: Align(
child: ChangeNotifierProvider<MessagingProviders>.value(
value: MessagingProviders.instance,
child: _loginPageUI(),
),
//_loginPageUI(),
),
);
}
Widget _loginPageUI() {
return Builder(builder: (BuildContext _context) {
SnackBarService.instance.buildContext = _context;
_auth = Provider.of<MessagingProviders>(_context);
return Container(
height: _deviceHeight * 0.60,
// color: Colors.red,
padding: EdgeInsets.symmetric(horizontal: _deviceWidth * 0.10),
alignment: Alignment.center,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.center,
children: [
_headingWidget(),
_inputForm(),
_loginButton(),
_registerButton(),
],
),
);
});
}
Widget _headingWidget() {
return SizedBox(
height: _deviceHeight * 0.12,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'Welcome Back!',
style: TextStyle(fontSize: 35, fontWeight: FontWeight.w700),
),
Text(
'Please Login to your Account',
style: TextStyle(fontSize: 25, fontWeight: FontWeight.w200),
)
],
),
);
}
Widget _inputForm() {
return SizedBox(
height: _deviceHeight * 0.16,
child: Form(
key: _formKey,
onChanged: () {
_formKey.currentState?.save();
},
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_emailTextField(),
_passwordTextField(),
],
),
),
);
}
Widget _emailTextField() {
return TextFormField(
autocorrect: false,
style: TextStyle(
color: Colors.white,
),
validator: (_input) {
return _input!.isNotEmpty && _input.contains("@")
? null
: "Please enter a valid Email";
},
onSaved: (_input) {
setState(() {
_email = _input!;
});
},
cursorColor: Colors.white,
decoration: InputDecoration(
hintText: "Email Address",
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.white))),
);
}
Widget _passwordTextField() {
return TextFormField(
autocorrect: false,
style: TextStyle(
color: Colors.white,
),
validator: (_input) {
return _input!.isNotEmpty ? null : "Please enter a Password";
},
onSaved: (_input) {
setState(() {
_password = _input!;
});
},
obscureText: true,
cursorColor: Colors.white,
decoration: InputDecoration(
hintText: "Password",
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.white))),
);
}
Widget _loginButton() {
return _auth.status == AuthStatus.authenticating
? Align(
alignment: Alignment.center,
child: CircularProgressIndicator(),
)
: SizedBox(
height: _deviceHeight * 0.06,
width: _deviceWidth,
child: MaterialButton(
onPressed: () {
if (_formKey.currentState!.validate()) {
//Login User
_auth.loginWithEmailAndPassword(_email!, _password!);
}
},
color: Colors.blue,
child: Text(
'Login',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w700,
),
),
),
);
}
Widget _registerButton() {
return GestureDetector(
onTap: () {
NavigationService.instance.navigateTo("register");
},
child: SizedBox(
height: _deviceHeight * 0.06,
width: _deviceWidth,
child: Text(
'REGISTER',
textAlign: TextAlign.center,
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w700,
),
),
),
);
}
}
lib/pages/registeration_page.dart
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import 'dart:io';
import 'package:flutter/material.dart';
import 'package:image_picker/image_picker.dart';
import 'package:messaging_app/components/messaging_provider.dart';
import 'package:messaging_app/service/media_service.dart';
import 'package:messaging_app/service/navigation_service.dart';
import 'package:messaging_app/service/snackbar_service.dart';
import 'package:provider/provider.dart';
class RegisterationPage extends StatefulWidget {
const RegisterationPage({super.key});
@override
State<StatefulWidget> createState() {
return _RegisterationPageState();
}
}
class _RegisterationPageState extends State<RegisterationPage> {
//
var _deviceHeight;
var _deviceWidth;
XFile? _image;
String? _name;
String? _email;
String? _password;
late GlobalKey<FormState> _formKey;
late MessagingProviders _auth;
_RegisterationPageState() {
_formKey = GlobalKey<FormState>();
}
@override
Widget build(BuildContext context) {
//
_deviceHeight = MediaQuery.of(context).size.height;
_deviceWidth = MediaQuery.of(context).size.width;
return Scaffold(
backgroundColor: Theme.of(context).scaffoldBackgroundColor,
body: Container(
// color: Colors.blue,
alignment: Alignment.center,
child: ChangeNotifierProvider<MessagingProviders>.value(
value: MessagingProviders.instance,
child: _registerationPageUI(),
),
),
);
}
Widget _registerationPageUI() {
return Builder(builder: (BuildContext _context) {
SnackBarService.instance.buildContext = _context;
_auth = Provider.of<MessagingProviders>(_context);
return Container(
// color: Colors.deepOrange,
height: _deviceHeight * 0.75,
padding: EdgeInsets.symmetric(horizontal: _deviceWidth * 0.10),
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_headingWidget(),
_inputForm(),
_registerButton(),
_backToLoginPage(),
],
),
);
});
}
Widget _headingWidget() {
return SizedBox(
height: _deviceHeight * 0.12,
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
'SignUp to Enjoy!',
style: TextStyle(fontSize: 35, fontWeight: FontWeight.w700),
),
Text(
'Please enter your details',
style: TextStyle(fontSize: 25, fontWeight: FontWeight.w200),
)
],
),
);
}
Widget _inputForm() {
return Container(
height: _deviceHeight * 0.35,
child: Form(
key: _formKey,
onChanged: () {
_formKey.currentState?.save();
},
child: Column(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
mainAxisSize: MainAxisSize.max,
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_imageSelectorWidgeet(),
_nameTextField(),
_emailTextField(),
_passwordTextField(),
],
),
),
);
}
Widget _imageSelectorWidgeet() {
return Align(
child: GestureDetector(
onTap: () async {
XFile? _imageFile = await MediaService.instance.getImageFromLibrary();
_imageFile!.name;
setState(() {
_image = _imageFile;
});
},
child: Container(
height: _deviceHeight * 0.10,
width: _deviceHeight * 0.10,
decoration: BoxDecoration(
color: Colors.transparent,
borderRadius: BorderRadius.circular(500),
image: DecorationImage(
fit: BoxFit.cover,
image: _image != null
? Image.file(File(_image!.path)).image
: NetworkImage('https://i.pravatar.cc/1000'),
// image: NetworkImage('https://cdn0.iconfinder.com/data/icons/occupation-002/64/programmer-programming-occupation-avatar-512.png'),
)),
),
),
);
}
Widget _nameTextField() {
return TextFormField(
autocorrect: false,
style: TextStyle(
color: Colors.white,
),
validator: (_input) {
return _input!.isNotEmpty ? null : "Please enter a valid Name";
},
onSaved: (_input) {
setState(() {
_name = _input!;
});
},
cursorColor: Colors.white,
decoration: InputDecoration(
hintText: "Name",
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.white))),
);
}
Widget _emailTextField() {
return TextFormField(
autocorrect: false,
style: TextStyle(
color: Colors.white,
),
validator: (_input) {
return _input!.isNotEmpty && _input.contains("@")
? null
: "Please enter a valid Email";
},
onSaved: (_input) {
setState(() {
_email = _input!;
});
},
cursorColor: Colors.white,
decoration: InputDecoration(
hintText: "Email",
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.white))),
);
}
Widget _passwordTextField() {
return TextFormField(
autocorrect: false,
style: TextStyle(
color: Colors.white,
),
validator: (_input) {
return _input!.isNotEmpty ? null : "Please enter a Password";
},
onSaved: (_input) {
setState(() {
_password = _input!;
});
},
obscureText: true,
cursorColor: Colors.white,
decoration: InputDecoration(
hintText: "Password",
focusedBorder: UnderlineInputBorder(
borderSide: BorderSide(color: Colors.white))),
);
}
Widget _registerButton() {
return _auth.status == AuthStatus.authenticating
? Align(
child: CircularProgressIndicator(),
)
: SizedBox(
height: _deviceHeight * 0.06,
width: _deviceWidth,
child: MaterialButton(
onPressed: () {
if (_formKey.currentState!.validate() && _image != null) {
//
_auth.createUser(_email!, _password!, (String _uid) async {
var _url = await _auth.uploadUserImage(_image, _uid);
_auth.createUserInDB(_uid, _email!, _name!, _url);
if (_auth.status == AuthStatus.authenticated) {
_auth.loginWithEmailAndPassword(_email!, _password!);
}
//
});
//Login User
// _auth.loginWithEmailAndPassword(_email!, _password!);
}
},
color: Colors.blue,
child: Text(
'Register',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w700,
),
),
),
);
}
Widget _backToLoginPage() {
return GestureDetector(
onTap: () {
NavigationService.instance.goBack();
},
child: Container(
height: _deviceHeight * 0.06,
width: _deviceWidth,
child: Icon(
Icons.arrow_back,
size: 40,
),
),
);
}
}
lib/service/media_service.dart
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import 'package:image_picker/image_picker.dart';
class MediaService {
//
static MediaService instance = MediaService();
Future<XFile?> getImageFromLibrary() async {
ImagePicker _picker = ImagePicker();
return await _picker.pickImage(source: ImageSource.gallery);
}
}
lib/service/navigation_service.dart
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import 'package:flutter/material.dart';
class NavigationService {
//
static NavigationService instance = NavigationService();
GlobalKey<NavigatorState>? navigatorKey;
NavigationService() {
navigatorKey = GlobalKey<NavigatorState>();
}
Future<dynamic>? navigateToReplacement(String _routeName) {
return navigatorKey!.currentState!.pushReplacementNamed(_routeName);
}
Future<dynamic>? navigateTo(String _routeName) {
return navigatorKey!.currentState!.pushNamed(_routeName);
}
Future<dynamic>? navigateToRoute(MaterialPageRoute _route) {
return navigatorKey!.currentState!.push(_route);
}
// Manually Call Function
goBack() {
return navigatorKey!.currentState!.pop();
}
}
lib/service/snackbar_service.dart
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import 'package:flutter/material.dart';
class SnackBarService {
//
BuildContext? _buildContext;
static SnackBarService instance = SnackBarService();
SnackBarService() {}
set buildContext(BuildContext _context) {
_buildContext = _context;
}
void showSnackBarError(String _message) {
ScaffoldMessenger.of(_buildContext!).showSnackBar(
SnackBar(
duration: Duration(seconds: 2),
content: Text(
_message,
style: TextStyle(
color: Colors.white,
fontSize: 15,
),
),
backgroundColor: Colors.red,
),
);
}
void showSnackBarSuccess(String _message) {
ScaffoldMessenger.of(_buildContext!).showSnackBar(
SnackBar(
duration: Duration(seconds: 2),
content: Text(
_message,
style: TextStyle(
color: Colors.white,
fontSize: 15,
),
),
backgroundColor: Colors.green,
),
);
}
}
pubspec.yaml
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name: messaging_app
description: "A new Flutter project."
# The following line prevents the package from being accidentally published to
# pub.dev using `flutter pub publish`. This is preferred for private packages.
publish_to: 'none' # Remove this line if you wish to publish to pub.dev
# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# In Android, build-name is used as versionName while build-number used as versionCode.
# Read more about Android versioning at https://developer.android.com/studio/publish/versioning
# In iOS, build-name is used as CFBundleShortVersionString while build-number is used as CFBundleVersion.
# Read more about iOS versioning at
# https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
# In Windows, build-name is used as the major, minor, and patch parts
# of the product and file versions while build-number is used as the build suffix.
version: 1.0.0+1
environment:
sdk: ^3.6.0
# Dependencies specify other packages that your package needs in order to work.
# To automatically upgrade your package dependencies to the latest versions
# consider running `flutter pub upgrade --major-versions`. Alternatively,
# dependencies can be manually updated by changing the version numbers below to
# the latest version available on pub.dev. To see which dependencies have newer
# versions available, run `flutter pub outdated`.
dependencies:
flutter:
sdk: flutter
# The following adds the Cupertino Icons font to your application.
# Use with the CupertinoIcons class for iOS style icons.
cupertino_icons: ^1.0.8
appwrite: 13.0.0
timeago: ^3.7.0
flutter_spinkit: ^5.2.1
provider: ^6.1.2
image_picker: ^1.1.2
dev_dependencies:
flutter_test:
sdk: flutter
# The "flutter_lints" package below contains a set of recommended lints to
# encourage good coding practices. The lint set provided by the package is
# activated in the `analysis_options.yaml` file located at the root of your
# package. See that file for information about deactivating specific lint
# rules and activating additional ones.
flutter_lints: ^5.0.0
# For information on the generic Dart part of this file, see the
# following page: https://dart.dev/tools/pub/pubspec
# The following section is specific to Flutter packages.
flutter:
# The following line ensures that the Material Icons font is
# included with your application, so that you can use the icons in
# the material Icons class.
uses-material-design: true
# To add assets to your application, add an assets section, like this:
# assets:
# - images/a_dot_burr.jpeg
# - images/a_dot_ham.jpeg
# An image asset can refer to one or more resolution-specific "variants", see
# https://flutter.dev/to/resolution-aware-images
# For details regarding adding assets from package dependencies, see
# https://flutter.dev/to/asset-from-package
# To add custom fonts to your application, add a fonts section here,
# in this "flutter" section. Each entry in this list should have a
# "family" key with the font family name, and a "fonts" key with a
# list giving the asset and other descriptors for the font. For
# example:
# fonts:
# - family: Schyler
# fonts:
# - asset: fonts/Schyler-Regular.ttf
# - asset: fonts/Schyler-Italic.ttf
# style: italic
# - family: Trajan Pro
# fonts:
# - asset: fonts/TrajanPro.ttf
# - asset: fonts/TrajanPro_Bold.ttf
# weight: 700
#
# For details regarding fonts from package dependencies,
# see https://flutter.dev/to/font-from-package
test/widget_test.dart
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// This is a basic Flutter widget test.
//
// To perform an interaction with a widget in your test, use the WidgetTester
// utility in the flutter_test package. For example, you can send tap and scroll
// gestures. You can also use WidgetTester to find child widgets in the widget
// tree, read text, and verify that the values of widget properties are correct.
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:messaging_app/main.dart';
void main() {
testWidgets('Counter increments smoke test', (WidgetTester tester) async {
// Build our app and trigger a frame.
await tester.pumpWidget(const MyApp());
// Verify that our counter starts at 0.
expect(find.text('0'), findsOneWidget);
expect(find.text('1'), findsNothing);
// Tap the '+' icon and trigger a frame.
await tester.tap(find.byIcon(Icons.add));
await tester.pump();
// Verify that our counter has incremented.
expect(find.text('0'), findsNothing);
expect(find.text('1'), findsOneWidget);
});
}