diff --git a/lib/src/protocol/notification.dart b/lib/src/protocol/notification.dart
index 7f26482..9f9ae84 100644
--- a/lib/src/protocol/notification.dart
+++ b/lib/src/protocol/notification.dart
@@ -54,7 +54,7 @@ class Notification extends Envelope {
     }
 
     if (reason != null) {
-      notification[reasonKey] = describeEnum(reasonKey);
+      notification[reasonKey] = reason?.toJson();
     }
 
     return notification;
diff --git a/pubspec.lock b/pubspec.lock
index ad3b701..b926d05 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -1,6 +1,27 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  _fe_analyzer_shared:
+    dependency: transitive
+    description:
+      name: _fe_analyzer_shared
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "38.0.0"
+  analyzer:
+    dependency: transitive
+    description:
+      name: analyzer
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.4.1"
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.0"
   async:
     dependency: transitive
     description:
@@ -15,6 +36,62 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  build:
+    dependency: transitive
+    description:
+      name: build
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.0"
+  build_config:
+    dependency: transitive
+    description:
+      name: build_config
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
+  build_daemon:
+    dependency: transitive
+    description:
+      name: build_daemon
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.0"
+  build_resolvers:
+    dependency: transitive
+    description:
+      name: build_resolvers
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.8"
+  build_runner:
+    dependency: "direct dev"
+    description:
+      name: build_runner
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.10"
+  build_runner_core:
+    dependency: transitive
+    description:
+      name: build_runner_core
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "7.2.3"
+  built_collection:
+    dependency: transitive
+    description:
+      name: built_collection
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.1.1"
+  built_value:
+    dependency: transitive
+    description:
+      name: built_value
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "8.2.3"
   characters:
     dependency: transitive
     description:
@@ -29,6 +106,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.3.1"
+  checked_yaml:
+    dependency: transitive
+    description:
+      name: checked_yaml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
   clock:
     dependency: transitive
     description:
@@ -36,6 +120,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
+  code_builder:
+    dependency: transitive
+    description:
+      name: code_builder
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.1.0"
   collection:
     dependency: transitive
     description:
@@ -43,6 +134,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.15.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.1"
   crypto:
     dependency: transitive
     description:
@@ -50,6 +148,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "3.0.1"
+  dart_style:
+    dependency: transitive
+    description:
+      name: dart_style
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.3"
   fake_async:
     dependency: transitive
     description:
@@ -57,6 +162,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.0"
+  file:
+    dependency: transitive
+    description:
+      name: file
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "6.1.2"
+  fixnum:
+    dependency: transitive
+    description:
+      name: fixnum
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -74,6 +193,62 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  frontend_server_client:
+    dependency: transitive
+    description:
+      name: frontend_server_client
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.2"
+  glob:
+    dependency: transitive
+    description:
+      name: glob
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
+  graphs:
+    dependency: transitive
+    description:
+      name: graphs
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  http_multi_server:
+    dependency: transitive
+    description:
+      name: http_multi_server
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.2.0"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.0.0"
+  io:
+    dependency: transitive
+    description:
+      name: io
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
+  js:
+    dependency: transitive
+    description:
+      name: js
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.6.4"
+  json_annotation:
+    dependency: transitive
+    description:
+      name: json_annotation
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "4.5.0"
   lints:
     dependency: transitive
     description:
@@ -109,6 +284,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.7.0"
+  mime:
+    dependency: transitive
+    description:
+      name: mime
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
+  mockito:
+    dependency: "direct dev"
+    description:
+      name: mockito
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.1.0"
+  package_config:
+    dependency: transitive
+    description:
+      name: package_config
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.2"
   path:
     dependency: transitive
     description:
@@ -116,6 +312,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
+  pool:
+    dependency: transitive
+    description:
+      name: pool
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.5.0"
   pretty_json:
     dependency: "direct main"
     description:
@@ -123,6 +326,34 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.0.0"
+  pub_semver:
+    dependency: transitive
+    description:
+      name: pub_semver
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.1"
+  pubspec_parse:
+    dependency: transitive
+    description:
+      name: pubspec_parse
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.0"
+  shelf:
+    dependency: transitive
+    description:
+      name: shelf
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
+  shelf_web_socket:
+    dependency: transitive
+    description:
+      name: shelf_web_socket
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
   simple_logger:
     dependency: "direct main"
     description:
@@ -135,6 +366,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.99"
+  source_gen:
+    dependency: transitive
+    description:
+      name: source_gen
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.2.2"
   source_span:
     dependency: transitive
     description:
@@ -156,6 +394,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  stream_transform:
+    dependency: transitive
+    description:
+      name: stream_transform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.0"
   string_scanner:
     dependency: transitive
     description:
@@ -177,6 +422,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.4.8"
+  timing:
+    dependency: transitive
+    description:
+      name: timing
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.0"
   typed_data:
     dependency: transitive
     description:
@@ -198,6 +450,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.1"
+  watcher:
+    dependency: transitive
+    description:
+      name: watcher
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.1"
+  web_socket_channel:
+    dependency: transitive
+    description:
+      name: web_socket_channel
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.0"
+  yaml:
+    dependency: transitive
+    description:
+      name: yaml
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.0"
 sdks:
-  dart: ">=2.14.0 <3.0.0"
+  dart: ">=2.16.0 <3.0.0"
   flutter: ">=1.17.0"
diff --git a/pubspec.yaml b/pubspec.yaml
index 52efe91..968d1b2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -19,7 +19,7 @@ dependencies:
 dev_dependencies:
   flutter_test:
     sdk: flutter
+  mockito: ^5.1.0
+  build_runner: ^2.1.10
   flutter_lints: ^1.0.0
 
-flutter:
-
diff --git a/test/protocol/client/client_channel_test.dart b/test/protocol/client/client_channel_test.dart
new file mode 100644
index 0000000..0e2ff73
--- /dev/null
+++ b/test/protocol/client/client_channel_test.dart
@@ -0,0 +1,68 @@
+import 'package:flutter_test/flutter_test.dart';
+import 'package:lime/lime.dart';
+import 'package:mockito/annotations.dart';
+import 'package:mockito/mockito.dart';
+import 'client_channel_test.mocks.dart';
+
+@GenerateMocks([],
+    customMocks: [MockSpec<WebSocketTransport>(returnNullOnMissingStub: true)])
+void main() {
+  final mockWebSocketTransport = MockWebSocketTransport();
+
+  ClientChannel clientChannel = ClientChannel(mockWebSocketTransport);
+
+  group('startNewSession', () {
+    test('should return a exception if state is not isNew', () {
+      clientChannel.state = SessionState.authenticating;
+
+      expect(clientChannel.startNewSession(), throwsException);
+      verifyNever(mockWebSocketTransport.send(any));
+    });
+    test('should called the send at transport if session state is new', () {
+      clientChannel.state = SessionState.isNew;
+
+      clientChannel.startNewSession();
+      verify(mockWebSocketTransport.send(any)).called(1);
+    });
+  });
+
+  group('authenticateSession', () {
+    test('should return a exception if state is not authenticating', () {
+      clientChannel.state = SessionState.isNew;
+
+      expect(
+          clientChannel.authenticateSession('', '', ExternalAuthentication()),
+          throwsException);
+      verifyNever(mockWebSocketTransport.send(any));
+    });
+    test(
+        'should called the send at transport if session state is authenticating',
+        () {
+      clientChannel.state = SessionState.authenticating;
+
+      clientChannel.authenticateSession(
+          'name@domain',
+          'instance',
+          ExternalAuthentication(
+              token: 'eyJhbGciOiJSUzI1NiIsImtpZCI6IjRlY2RmZmV...',
+              issuer: 'account.blip.ai'));
+      verify(mockWebSocketTransport.send(any)).called(1);
+    });
+  });
+
+  group('sendFinishingSession', () {
+    test('should return a exception if state is not established', () {
+      clientChannel.state = SessionState.isNew;
+
+      expect(clientChannel.sendFinishingSession(), throwsException);
+      verifyNever(mockWebSocketTransport.send(any));
+    });
+    test('should called the send at transport if session state is established',
+        () {
+      clientChannel.state = SessionState.established;
+
+      clientChannel.sendFinishingSession();
+      verify(mockWebSocketTransport.send(any)).called(1);
+    });
+  });
+}
diff --git a/test/protocol/client/client_channel_test.mocks.dart b/test/protocol/client/client_channel_test.mocks.dart
new file mode 100644
index 0000000..d85afe3
--- /dev/null
+++ b/test/protocol/client/client_channel_test.mocks.dart
@@ -0,0 +1,88 @@
+// Mocks generated by Mockito 5.1.0 from annotations
+// in lime/test/protocol/client/client_channel_test.dart.
+// Do not manually edit this file.
+
+import 'dart:async' as _i2;
+import 'dart:io' as _i5;
+
+import 'package:lime/src/protocol/enums/session_compression.enum.dart' as _i6;
+import 'package:lime/src/protocol/enums/session_encryption.enum.dart' as _i7;
+import 'package:lime/src/protocol/envelope.dart' as _i8;
+import 'package:lime/src/protocol/network/web_socket_transport.dart' as _i4;
+import 'package:mockito/mockito.dart' as _i1;
+import 'package:simple_logger/simple_logger.dart' as _i3;
+
+// ignore_for_file: type=lint
+// ignore_for_file: avoid_redundant_argument_values
+// ignore_for_file: avoid_setters_without_getters
+// ignore_for_file: comment_references
+// ignore_for_file: implementation_imports
+// ignore_for_file: invalid_use_of_visible_for_testing_member
+// ignore_for_file: prefer_const_constructors
+// ignore_for_file: unnecessary_parenthesis
+// ignore_for_file: camel_case_types
+
+class _FakeStreamController_0<T> extends _i1.Fake
+    implements _i2.StreamController<T> {}
+
+class _FakeSimpleLogger_1 extends _i1.Fake implements _i3.SimpleLogger {}
+
+/// A class which mocks [WebSocketTransport].
+///
+/// See the documentation for Mockito's code generation for more information.
+class MockWebSocketTransport extends _i1.Mock
+    implements _i4.WebSocketTransport {
+  @override
+  set stream(_i2.StreamController<Map<String, dynamic>>? _stream) =>
+      super.noSuchMethod(Invocation.setter(#stream, _stream),
+          returnValueForMissingStub: null);
+  @override
+  set socket(_i5.WebSocket? _socket) =>
+      super.noSuchMethod(Invocation.setter(#socket, _socket),
+          returnValueForMissingStub: null);
+  @override
+  set sessionId(String? _sessionId) =>
+      super.noSuchMethod(Invocation.setter(#sessionId, _sessionId),
+          returnValueForMissingStub: null);
+  @override
+  _i2.StreamController<bool> get onClose =>
+      (super.noSuchMethod(Invocation.getter(#onClose),
+              returnValue: _FakeStreamController_0<bool>())
+          as _i2.StreamController<bool>);
+  @override
+  set onClose(_i2.StreamController<bool>? _onClose) =>
+      super.noSuchMethod(Invocation.setter(#onClose, _onClose),
+          returnValueForMissingStub: null);
+  @override
+  _i3.SimpleLogger get logger => (super.noSuchMethod(Invocation.getter(#logger),
+      returnValue: _FakeSimpleLogger_1()) as _i3.SimpleLogger);
+  @override
+  set compression(_i6.SessionCompression? _compression) =>
+      super.noSuchMethod(Invocation.setter(#compression, _compression),
+          returnValueForMissingStub: null);
+  @override
+  set encryption(_i7.SessionEncryption? _encryption) =>
+      super.noSuchMethod(Invocation.setter(#encryption, _encryption),
+          returnValueForMissingStub: null);
+  @override
+  set onEvelope(_i2.StreamController<Map<String, dynamic>>? _onEvelope) =>
+      super.noSuchMethod(Invocation.setter(#onEvelope, _onEvelope),
+          returnValueForMissingStub: null);
+  @override
+  _i2.Future<void> open(String? uri) =>
+      (super.noSuchMethod(Invocation.method(#open, [uri]),
+          returnValue: Future<void>.value(),
+          returnValueForMissingStub: Future<void>.value()) as _i2.Future<void>);
+  @override
+  _i2.Future<void> close() => (super.noSuchMethod(Invocation.method(#close, []),
+      returnValue: Future<void>.value(),
+      returnValueForMissingStub: Future<void>.value()) as _i2.Future<void>);
+  @override
+  void send(_i8.Envelope? envelope) =>
+      super.noSuchMethod(Invocation.method(#send, [envelope]),
+          returnValueForMissingStub: null);
+  @override
+  void ensureSocketOpen() =>
+      super.noSuchMethod(Invocation.method(#ensureSocketOpen, []),
+          returnValueForMissingStub: null);
+}
diff --git a/test/protocol/command_test.dart b/test/protocol/command_test.dart
new file mode 100644
index 0000000..d5ca4c4
--- /dev/null
+++ b/test/protocol/command_test.dart
@@ -0,0 +1,60 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:lime/lime.dart';
+import 'dart:convert';
+import 'dart:io';
+
+void main() {
+  const String jsonPath = "test_resources/command.json";
+  Map<String, dynamic> json = <String, dynamic>{};
+
+  setUp(() async {
+    final file = File(jsonPath);
+    json = jsonDecode(await file.readAsString());
+  });
+
+  group('Command.fromJson', () {
+    test('should returns a Command object from a json document', () async {
+      final command = Command.fromJson(json);
+
+      expect(command, isA<Command>());
+    });
+    test('should set the Command properties ', () async {
+      final command = Command.fromJson(json);
+
+      expect(command.metadata, equals(json['metadata']));
+      expect(describeEnum(command.method!), equals(json['method']));
+      expect(command.resource, equals(json['resource']));
+      expect(describeEnum(command.status!), equals(json['status']));
+      expect(command.type, equals(json['type']));
+      expect(command.uri, equals(json['uri']));
+      expect(
+          command.reason!.description, equals(json['reason']['description']));
+      expect(command.reason!.code, equals(json['reason']['code']));
+    });
+  });
+
+  group('Command.toJson', () {
+    test('should returns a Json object from a Command object', () async {
+      final command = Command.fromJson(json);
+      final jsonDoc = command.toJson();
+
+      expect(jsonDoc, isA<Map>());
+    });
+    test('should set the json properties ', () async {
+      final command = Command.fromJson(json);
+      final jsonDoc = command.toJson();
+
+      expect(jsonDoc['metadata'], equals(command.metadata));
+      expect(jsonDoc['method'], equals(describeEnum(command.method!)));
+      expect(jsonDoc['resource'], equals(command.resource));
+      expect(jsonDoc['status'], equals(describeEnum(command.status!)));
+      expect(jsonDoc['type'], equals(command.type));
+      expect(jsonDoc['uri'], equals(command.uri));
+      expect(jsonDoc['reason']['description'],
+          equals(command.reason!.description));
+      expect(jsonDoc['reason']['code'], equals(command.reason!.code));
+    });
+  });
+}
diff --git a/test/protocol/envelope_test.dart b/test/protocol/envelope_test.dart
new file mode 100644
index 0000000..55618d0
--- /dev/null
+++ b/test/protocol/envelope_test.dart
@@ -0,0 +1,30 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:lime/lime.dart';
+import 'dart:convert';
+import 'dart:io';
+
+void main() async {
+  const String jsonPath = "test_resources/envelope.json";
+  Map<String, dynamic> json = <String, dynamic>{};
+
+  final file = File(jsonPath);
+  json = jsonDecode(await file.readAsString());
+
+  group('Envelope.fromJson', () {
+    test('should returns a Envelope object from a json document', () async {
+      final envelope = Envelope.fromJson(json);
+
+      expect(envelope, isA<Envelope>());
+    });
+    test('should set the Envelope properties ', () async {
+      final envelope = Envelope.fromJson(json);
+
+      expect(envelope.id, equals(json['id']));
+      expect(envelope.to.toString(), equals(json['to']));
+      expect(envelope.from.toString(), equals(json['from']));
+      expect(envelope.pp.toString(), equals(json['pp']));
+      expect(envelope.metadata, equals(json['metadata']));
+    });
+  });
+}
diff --git a/test/protocol/message_test.dart b/test/protocol/message_test.dart
new file mode 100644
index 0000000..146aebc
--- /dev/null
+++ b/test/protocol/message_test.dart
@@ -0,0 +1,43 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:lime/lime.dart';
+import 'dart:convert';
+import 'dart:io';
+
+void main() async {
+  const String jsonPath = "test_resources/message.json";
+  Map<String, dynamic> json = <String, dynamic>{};
+
+  final file = File(jsonPath);
+  json = jsonDecode(await file.readAsString());
+
+  group('Message.fromJson', () {
+    test('should returns a Message object from a json document', () async {
+      final message = Message.fromJson(json);
+
+      expect(message, isA<Message>());
+    });
+    test('should set the Message properties ', () async {
+      final message = Message.fromJson(json);
+
+      expect(message.type, equals(json['type']));
+      expect(message.content, equals(json['content']));
+    });
+  });
+
+  group('Message.toJson', () {
+    test('should returns a Json object from a Message object', () async {
+      final message = Message.fromJson(json);
+      final jsonDoc = message.toJson();
+
+      expect(jsonDoc, isA<Map>());
+    });
+    test('should set the json properties ', () async {
+      final message = Message.fromJson(json);
+      final jsonDoc = message.toJson();
+
+      expect(jsonDoc['type'], equals(message.type));
+      expect(jsonDoc['content'], equals(message.content));
+    });
+  });
+}
diff --git a/test/protocol/notification_test.dart b/test/protocol/notification_test.dart
new file mode 100644
index 0000000..383de32
--- /dev/null
+++ b/test/protocol/notification_test.dart
@@ -0,0 +1,48 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:lime/lime.dart';
+import 'dart:convert';
+import 'dart:io';
+
+void main() async {
+  const String jsonPath = "test_resources/notification.json";
+  Map<String, dynamic> json = <String, dynamic>{};
+
+  final file = File(jsonPath);
+  json = jsonDecode(await file.readAsString());
+
+  group('Notification.fromJson', () {
+    test('should returns a Notification object from a json document', () async {
+      final notification = Notification.fromJson(json);
+
+      expect(notification, isA<Notification>());
+    });
+    test('should set the Notification properties ', () async {
+      final notification = Notification.fromJson(json);
+
+      expect(describeEnum(notification.event!), equals(json['event']));
+      expect(notification.reason!.description,
+          equals(json['reason']['description']));
+      expect(notification.reason!.code, equals(json['reason']['code']));
+    });
+  });
+
+  group('Notification.toJson', () {
+    test('should returns a Json object from a Notification object', () async {
+      final notification = Notification.fromJson(json);
+      final jsonDoc = notification.toJson();
+
+      expect(jsonDoc, isA<Map>());
+    });
+    test('should set the json properties ', () async {
+      final notification = Notification.fromJson(json);
+      final jsonDoc = notification.toJson();
+
+      expect(jsonDoc['event'], equals(describeEnum(notification.event!)));
+      expect(jsonDoc['reason']['description'],
+          equals(notification.reason!.description));
+      expect(jsonDoc['reason']['code'], equals(notification.reason!.code));
+    });
+  });
+}
diff --git a/test/protocol/reason_test.dart b/test/protocol/reason_test.dart
new file mode 100644
index 0000000..09448eb
--- /dev/null
+++ b/test/protocol/reason_test.dart
@@ -0,0 +1,51 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:lime/lime.dart';
+import 'dart:convert';
+import 'dart:io';
+
+void main() async {
+  const String jsonPath = "test_resources/reason.json";
+  Map<String, dynamic> json = <String, dynamic>{};
+
+  final file = File(jsonPath);
+  json = jsonDecode(await file.readAsString());
+
+  group('Reason.fromJson', () {
+    test('should returns a Reason object from a json document', () async {
+      final reason = Reason.fromJson(json);
+
+      expect(reason, isA<Reason>());
+    });
+    test('should set the Reason properties ', () async {
+      final reason = Reason.fromJson(json);
+
+      expect(reason.code, equals(json['code']));
+      expect(reason.description, equals(json['description']));
+    });
+  });
+
+  group('Reason.toJson', () {
+    test('should returns a Json object from a Reason object', () async {
+      final reason = Reason.fromJson(json);
+      final jsonDoc = reason.toJson();
+
+      expect(jsonDoc, isA<Map>());
+    });
+    test('should set the json properties ', () async {
+      final reason = Reason.fromJson(json);
+      final jsonDoc = reason.toJson();
+
+      expect(jsonDoc['code'], equals(reason.code));
+      expect(jsonDoc['description'], equals(reason.description));
+    });
+  });
+
+  group('toString()', () {
+    test("should returns 'description (Code code)'", () {
+      final reason = Reason(code: 0, description: 'timeout');
+
+      expect(reason.toString(), equals('timeout (Code 0)'));
+    });
+  });
+}
diff --git a/test/protocol/session_test.dart b/test/protocol/session_test.dart
new file mode 100644
index 0000000..ecd5b85
--- /dev/null
+++ b/test/protocol/session_test.dart
@@ -0,0 +1,41 @@
+import 'package:flutter/foundation.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:lime/lime.dart';
+import 'dart:convert';
+import 'dart:io';
+
+void main() async {
+  const String jsonPath = "test_resources/session.json";
+  Map<String, dynamic> json = <String, dynamic>{};
+
+  final file = File(jsonPath);
+  json = jsonDecode(await file.readAsString());
+
+  group('Session.fromJson', () {
+    test('should returns a Session object from a json document', () async {
+      final session = Session.fromJson(json);
+
+      expect(session, isA<Session>());
+    });
+    test('should set the Session properties ', () async {
+      final session = Session.fromJson(json);
+
+      expect(describeEnum(session.state!), equals(json['state']));
+      expect(
+          session.reason!.description, equals(json['reason']['description']));
+      expect(session.reason!.code, equals(json['reason']['code']));
+      expect((session.schemeOptions!.length),
+          equals(json['schemeOptions'].length));
+    });
+  });
+
+  group('Session.toJson', () {
+    test('should returns a Json object from a Session object', () async {
+      final session = Session.fromJson(json);
+      final jsonDoc = session.toJson();
+
+      expect(jsonDoc, isA<Map>());
+    });
+  });
+}
diff --git a/test_resources/command.json b/test_resources/command.json
new file mode 100644
index 0000000..87ed98a
--- /dev/null
+++ b/test_resources/command.json
@@ -0,0 +1,12 @@
+{
+    "from": "postmaster@desk.msging.net/!hmg-az-iris2",
+    "id": "78bf09f7-39ae-46bb-a293-3f66d3464ce0",
+    "metadata": {"server.shouldStore": "True", "#command.uri": "lime://andre.rossi%40take.net@blip.ai/tickets/active"},
+    "method": "get",
+    "resource": {"total": 8, "itemType": "application/vnd.iris.ticket+json", "items": []},
+    "status": "success",
+    "to": "andre.rossi%40take.net@blip.ai/!desk",
+    "type": "application/vnd.lime.collection+json",
+    "uri": "/ping",
+    "reason": {"code": 0, "description": "Timeout"}
+}
\ No newline at end of file
diff --git a/test_resources/envelope.json b/test_resources/envelope.json
new file mode 100644
index 0000000..d2582b9
--- /dev/null
+++ b/test_resources/envelope.json
@@ -0,0 +1,7 @@
+{
+    "id": "78bf09f7-39ae-46bb-a293-3f66d3464ce0",
+    "to": "postmaster@desk.msging.net",
+    "from": "postmaster@desk.msging.net",
+    "pp": "postmaster@desk.msging.net",
+    "metadata": {"server.shouldStore": "true"}
+}
\ No newline at end of file
diff --git a/test_resources/message.json b/test_resources/message.json
new file mode 100644
index 0000000..151da5e
--- /dev/null
+++ b/test_resources/message.json
@@ -0,0 +1,6 @@
+{
+    "id": "78bf09f7-39ae-46bb-a293-3f66d3464ce0",
+    "to": "bfba9ce2-e461-4b42-9ba1-01806751fde1@desk.msging.net/Lime",
+    "type": "text/plain",
+    "content": "oi"
+}
\ No newline at end of file
diff --git a/test_resources/notification.json b/test_resources/notification.json
new file mode 100644
index 0000000..1367154
--- /dev/null
+++ b/test_resources/notification.json
@@ -0,0 +1,7 @@
+{
+    "id": "78bf09f7-39ae-46bb-a293-3f66d3464ce0",
+    "from": "postmaster@blip.ai/#hmg-az-iris2",
+    "to": "andre.rossi%40take.net@blip.ai/!desk",
+    "event": "failed",
+    "reason": {"code": 0, "description": "Timeout"}
+}
\ No newline at end of file
diff --git a/test_resources/reason.json b/test_resources/reason.json
new file mode 100644
index 0000000..e9a1041
--- /dev/null
+++ b/test_resources/reason.json
@@ -0,0 +1,4 @@
+{
+    "code": 0,
+    "description": "Timeout"
+}
\ No newline at end of file
diff --git a/test_resources/session.json b/test_resources/session.json
new file mode 100644
index 0000000..0edafa2
--- /dev/null
+++ b/test_resources/session.json
@@ -0,0 +1,13 @@
+{
+    "authentication": {
+        "issuer": "account.blip.ai",
+        "scheme": "external",
+        "token": "eyJhbGciOiJSUzI1NiIsImtpZCI6IjRlY2RmZmViNjJlYjA0ZW.."
+    },
+    "from": "andre.rossi%40take.net@blip.ai/!desk",
+    "id": "571c06ca-dfed-4101-9e97-0d0b9ccf8d24",
+    "scheme": "external",
+    "state": "authenticating",
+    "schemeOptions": ["guest", "plain", "transport", "key", "external"],
+    "reason": {"code": 0, "description": "Timeout"}
+}
\ No newline at end of file