added license header for src. Added changelog

.gitlab-ci.yml

@@ -0,0 +1,23 @@
+# This file is a template, and might need editing before it works on your project.
+# https://hub.docker.com/r/google/dart
+image: google/dart:latest
+
+variables:
+  # Use to learn more:
+  # pub run test --help
+  PUB_VARS: "--platform vm --timeout 30s --concurrency=6 --test-randomize-ordering-seed=random --reporter=expanded"
+
+# Cache downloaded dependencies and plugins between builds.
+# To keep cache across branches add 'key: "$CI_JOB_NAME"'
+cache:
+  paths:
+    - .pub-cache/global_packages
+
+before_script:
+  - export PATH="$PATH":"~/.pub-cache/bin"
+  - pub get --no-precompile
+
+test:
+  stage: test
+  script:
+    - pub run test $PUB_VARS

CHANGELOG.md

@@ -0,0 +1,6 @@
+
+---
+
+0.1.0  Initial release
+
+---

README.md

@@ -1,247 +1,13 @@
 # dart_di
 
-Экспериментальная разработка DI на ЯП Dart
+Experimental development of DI in the Dart language
 
-## Документация
-
-### Быстрый старт
-
-Основным классом для всех операций является `DiContainer`. Вы можете зарегистрировать свои зависимости,
-получив `ResolvingContext` через метод `bind<T>()` и используя его различные методы разрешений.
-Далее вы можете получить зависимости с помощью `resolve<T>()`.
-
-Пример:
-
-```dart
-final container = DiContainer();
-container.bind<SomeService>().toValue(SomeServiceImpl());
-/*
-...
- */
-
-// Метод `resolve` просто возвращает зарегистрированный ранее экземпляр
-final someService = container.resolve<SomeService>();
-```
-
-### Ленивая инициализация
-
-Если вам нужно создать объект в момент резолвинга, вы можете использовать ленивую (другими словами, по запросу) инициализацию объекта 
-с помощью метода `toFactoryN()`.
-
-Пример:
-
-```dart
-final container = DiContainer();
-// В методе `toFactory` вы просто определяете, как построить экземпляр через фабричную лямбду
-container.bind<SomeService>().toFactory( () => SomeServiceImpl() );
-/*
-...
- */
-// Метод `resolve()` будет создавать экземпляр через зарегистрированную фабричную лямбду каждый раз, когда вы вызываете его
-final someService = container.resolve<SomeService>();
-final anotherSomeService = container.resolve<SomeService>();
-assert(someService != anotherSomeService);
-```
-
-Но обычно у вас есть много типов с разными зависимостями, которые образуют граф зависимостей.
-
-Пример:
-
-```dart
-class A {}
-class B {}
-
-class C {
-    final A a;
-    final B b;
-
-    C(this.a, this.b);
-}
-```
+- [New Api ENG](/doc/quick_start_en.md)
+- [New Api RU](/doc/quick_start_ru.md)
 
 
-Если вам нужно зарегистрировать некоторый тип, зависящий от других типов из контейнера,
-вы можете использовать методы `toFactory1<T1>` - `toFactory8<T1 ... T8>`, где число в конце,
-является количеством запрошенных через аргументы типов зависимостей.
-(Обратите внимание, что вам нужно определить все зависимости в аргументах - `toFactory2<A1, A2>`).
+### Features
 
-
-Пример:
-
-```dart
-class SomeService {
-    final A a;
-    final B b;
-
-    SomeService(this.a, this.b);
-}
-
-final container = DiContainer();
-container.bind<A>(A::class).toFactory (() => A());
-container.bind<B>(B::class).toFactory (() => B());
-
-/// В фабричной лямбде вы определяете, как построить зависимость от других зависимостей
-/// (Порядок разрешенных экземпляров соответствует порядку типов аргументов)
-container.bind<SomeService>().toFactory2<A, B>((a, b) => SomeService(a, b));
-
-/*
-...
- */
-
-/// Получаем экземпляр `SomeService` через resolve своих зависимостей.
-/// В нашем случае - это resolve A и B
-/// Внимание!!! То, что он будет создавать новые экземпляры A и B каждый раз, когда вы вызываете `resolve` SomeService
-final someService = container.resolve<SomeService>();
-```
-
-### Время жизни экземпляров и контроль области видимости
-
-Если вы хотите создать экземпляр зарегистрированной зависимости только один раз,
-и вам нужно получить/разрешить зависимость много раз в контейнере, то вы можете зарегистрировать
-свою зависимость с добавлением `asSingeton()`. Например:
-
-```dart
-final container = DiContainer();
-container.bind<A>()
-  .toFactory(() => A())
-  .asSingleton();
-
-container
-  .bind<B>()
-  .toFactory(() => B());
-  .asSingleton();
-
-container.bind<SomeService>().toFactory2<A, B>((a, b) -> SomeService(a, b));
-
-// Код выше означает: Контейнер, регистрирует создание A и B только в первый раз, когда оно будет запрошен,
-// и регистрирует создание SomeService каждый раз, когда оно будет запрошен.
-
-final a = container.resolve<A>();
-final b = container.resolve<B>();
-final anotherA = container.resolve<A>();
-final anotherB = container.resolve<B>();
-
-assert(a == anotherA && b == anotherB);
-
-final someService = container.resolve<SomeService>();
-final anotherSomeService = container.resolve<SomeService>();
-
-assert(someService != anotherSomeService);
-```
-
-Если вы хотите сразу создать свой зарегистрированный экземпляр, вы можете вызвать `resolve()`. Например:
-
-
-```dart
-final container = DiContainer();
-// Это заставит создать зависимость после регистрации
-container.bind <SomeService>()
-  .toFactory(() => SomeService())
-  .asSingleton()
-  .resolve();
-```
-
-Когда вы работаете со сложным приложением, в большинстве случаев вы можете работать со многими модулями с собственными зависимостями.
-Эти модули могут быть настроены различными `DiContainer`-ми. И вы можете прикрепить контейнер к другому, как родительский.
-В этом случае родительские зависимости будут видны для дочернего контейнера,
-и через него вы можете формировать различные области видимости зависимостей. Например:
-
-```dart
-final parentContainer = DiContainer();
-parentContainer.bind<A>().toFactory(() => A())
-
-final childContainer =  DiContainer(parentContainer);
-// Обратите внимание, что родительская зависимость A видна для дочернего контейнера
-final a = childContainer.resolve<A>();
-
-/*
-// Но следующий код потерпит неудачу с ошибкой, потому что родитель не знает о своем потомке.
-final parentContainer = DiContainer();
-final childContainer = DiContainer();
-childContainer.bind<A>().toFactory(() => A());
-
-// Выдает ошибку
-final a = parentContainer.resolve<A>();
- */
-```
-
-### Структура библиотеки
-
-Библиотека состоит из DiContainer и Resolver. 
-DiContainer - это контейнер со всеми Resolver для разных типов. А `Resolver` - это просто объект, который знает, как разрешить данный тип.
-Многие из resolver-ов обернуты другими, поэтому они могут быть составлены для разных вариантов использования.
-Resolver - интерфейс, поэтому он имеет много реализаций. Основным является ResolvingContext. 
-Вы можете думать об этом как об объекте контекста, который имеет вспомогательные методы для создания различных вариантов  resolver-ов (`toFactory`,` toValue`, `asSingleton`).
-Но все они просто используют метод `toResolver` для определения некоторого корневого resolver в контексте.
-Когда вы запрашиваете тип из контейнера с помощью метода `resolve<T>()`, он просто находит контекст для типа и вызывает корневой resolver, который может вызывать другие resolver-ы.
-
-
-Пример (из ```example```): 
-
-```dart
-import 'dart:async';
-import 'package:meta/meta.dart';
-import 'package:dart_di/dart_di.dart';
-
-void main() async {
-  final dataModule = new DiContainer()
-    ..bind<ApiClient>().toValue(new ApiClientMock())
-    ..bind<DataRepository>()
-        .toFactory1<ApiClient>((c) => new NetworkDataRepository(c))
-    ..bind<DataBloc>().toFactory1<DataRepository>((s) => new DataBloc(s));
-
-  final dataBloc = dataModule.resolve<DataBloc>();
-  dataBloc.data.listen((d) => print('Received data: $d'),
-      onError: (e) => print('Error: $e'), onDone: () => print('DONE'));
-
-  await dataBloc.fetchData();
-}
-
-class DataBloc {
-  final DataRepository _dataRepository;
-
-  Stream<String> get data => _dataController.stream;
-  StreamController<String> _dataController = new StreamController.broadcast();
-
-  DataBloc(this._dataRepository);
-
-  Future<void> fetchData() async {
-    try {
-      _dataController.sink.add(await _dataRepository.getData());
-    } catch (e) {
-      _dataController.sink.addError(e);
-    }
-  }
-
-  void dispose() {
-    _dataController.close();
-  }
-}
-
-abstract class DataRepository {
-  Future<String> getData();
-}
-
-class NetworkDataRepository implements DataRepository {
-  final ApiClient _apiClient;
-  final _token = 'token';
-
-  NetworkDataRepository(this._apiClient);
-
-  @override
-  Future<String> getData() async => await _apiClient.sendRequest(
-      url: 'www.google.com', token: _token, requestBody: {'type': 'data'});
-}
-
-abstract class ApiClient {
-  Future sendRequest({@required String url, String token, Map requestBody});
-}
-
-class ApiClientMock implements ApiClient {
-  @override
-  Future sendRequest(
-      {@required String url, String token, Map requestBody}) async {
-    return 'hello world';
-  }
-}
-```
+- [x] Scope
+- [x] Sub scope
+- [x] Initialization instance with name

doc/quick_start_en.md

@@ -0,0 +1,195 @@
+# Quick start
+
+## Main components DI
+
+
+### Binding
+
+Binding is a custom instance configurator that contains methods for configuring a dependency.
+
+There are two main methods for initializing a custom instance `toInstance ()` and `toProvide ()` and auxiliary `withName ()` and `singeltone ()`.
+
+`toInstance()` - takes a initialized instance
+
+`toProvide()` -  takes a `provider` function (instance constructor)
+
+`withName()` - takes a string to name the instance. By this name, it will be possible to extract instance from the DI container
+
+`singeltone()` -  sets a flag in the Binding that tells the DI container that there is only one dependency.
+
+Example:
+
+```dart
+ // initializing a text string instance through a method toInstance()
+ Binding<String>().toInstance("hello world");
+
+ // or
+
+ // initializing a text string instance
+ Binding<String>().toProvide(() => "hello world");
+
+ // initializing an instance of a string named
+ Binding<String>().withName("my_string").toInstance("hello world");
+ // or
+ Binding<String>().withName("my_string").toProvide(() => "hello world");
+
+ // instance initialization like singleton
+ Binding<String>().toInstance("hello world");
+ // or
+ Binding<String>().toProvide(() => "hello world").singeltone();
+
+```
+
+### Module
+
+Module is a container of user instances, and on the basis of which the user can create their modules. The user in his module must implement the `void builder (Scope currentScope)` method.
+
+
+Example:
+
+```dart
+class AppModule extends Module {
+  @override
+  void builder(Scope currentScope) {
+    bind<ApiClient>().toInstance(ApiClientMock());
+  }
+}
+```
+
+### Scope
+
+Scope is a container that stores the entire dependency tree (scope, modules, instances).
+Through the scope, you can access the custom `instance`, for this you need to call the `resolve<T>()` method and specify the type of the object, and you can also pass additional parameters.
+
+Example:
+
+```dart
+    // open main scope
+    final rootScope =  DartDi.openRootScope();
+
+    // initializing scope with a custom module
+    rootScope.installModules([AppModule()]);
+
+    // takes custom instance
+    final str = rootScope.resolve<String>();
+    // or
+    final str = rootScope.tryResolve<String>();
+
+    // close main scope
+    DartDi.closeRootScope();
+```
+
+## Example app
+
+
+```dart
+import 'dart:async';
+import 'package:meta/meta.dart';
+import 'package:dart_di/experimental/scope.dart';
+import 'package:dart_di/experimental/module.dart';
+
+class AppModule extends Module {
+  @override
+  void builder(Scope currentScope) {
+    bind<ApiClient>().withName("apiClientMock").toInstance(ApiClientMock());
+    bind<ApiClient>().withName("apiClientImpl").toInstance(ApiClientImpl());
+  }
+}
+
+class FeatureModule extends Module {
+  bool isMock;
+
+  FeatureModule({required this.isMock});
+
+  @override
+  void builder(Scope currentScope) {
+    bind<DataRepository>()
+        .withName("networkRepo")
+        .toProvide(
+          () => NetworkDataRepository(
+            currentScope.resolve<ApiClient>(
+              named: isMock ? "apiClientMock" : "apiClientImpl",
+            ),
+          ),
+        )
+        .singeltone();
+    bind<DataBloc>().toProvide(
+      () => DataBloc(
+        currentScope.resolve<DataRepository>(named: "networkRepo"),
+      ),
+    );
+  }
+}
+
+void main() async {
+  final scope = openRootScope().installModules([
+    AppModule(),
+  ]);
+
+  final subScope = scope
+      .openSubScope("featureScope")
+      .installModules([FeatureModule(isMock: true)]);
+
+  final dataBloc = subScope.resolve<DataBloc>();
+  dataBloc.data.listen((d) => print('Received data: $d'),
+      onError: (e) => print('Error: $e'), onDone: () => print('DONE'));
+
+  await dataBloc.fetchData();
+}
+
+class DataBloc {
+  final DataRepository _dataRepository;
+
+  Stream<String> get data => _dataController.stream;
+  StreamController<String> _dataController = new StreamController.broadcast();
+
+  DataBloc(this._dataRepository);
+
+  Future<void> fetchData() async {
+    try {
+      _dataController.sink.add(await _dataRepository.getData());
+    } catch (e) {
+      _dataController.sink.addError(e);
+    }
+  }
+
+  void dispose() {
+    _dataController.close();
+  }
+}
+
+abstract class DataRepository {
+  Future<String> getData();
+}
+
+class NetworkDataRepository implements DataRepository {
+  final ApiClient _apiClient;
+  final _token = 'token';
+
+  NetworkDataRepository(this._apiClient);
+
+  @override
+  Future<String> getData() async => await _apiClient.sendRequest(
+      url: 'www.google.com', token: _token, requestBody: {'type': 'data'});
+}
+
+abstract class ApiClient {
+  Future sendRequest({@required String url, String token, Map requestBody});
+}
+
+class ApiClientMock implements ApiClient {
+  @override
+  Future sendRequest(
+      {@required String? url, String? token, Map? requestBody}) async {
+    return 'Local Data';
+  }
+}
+
+class ApiClientImpl implements ApiClient {
+  @override
+  Future sendRequest(
+      {@required String? url, String? token, Map? requestBody}) async {
+    return 'Network data';
+  }
+}
+```

doc/quick_start_ru.md

@@ -0,0 +1,195 @@
+# Быстрый старт
+
+## Основные компоненты DI
+
+
+### Binding
+
+Binding - по сути это конфигуратор  для  пользовательского instance, который соддержит методы для конфигурирования зависимости.
+
+Есть два основных метода для инициализации пользовательского instance `toInstance()` и `toProvide()` и вспомогательных `withName()` и `singeltone()`.
+
+`toInstance()` - принимает готовый экземпляр
+
+`toProvide()` -  принимает функцию `provider` (конструктор экземпляра)
+
+`withName()` - принимает строку для именования экземпляра. По этому имени можно будет извлечь instance из  DI контейнера
+
+`singeltone()` -  устанавливает флаг в Binding, который говорит DI контейнеру, что зависимость одна.
+
+Пример:
+
+```dart
+ // инициализация экземпляра текстовой строки через метод toInstance()
+ Binding<String>().toInstance("hello world");
+
+ // или
+
+ // инициализация экземпляра текстовой строки
+ Binding<String>().toProvide(() => "hello world");
+
+ // инициализация экземпляра строки с именем
+ Binding<String>().withName("my_string").toInstance("hello world");
+ // или
+ Binding<String>().withName("my_string").toProvide(() => "hello world");
+
+ // инициализация экземпляра, как сингелтон
+ Binding<String>().toInstance("hello world");
+ // или
+ Binding<String>().toProvide(() => "hello world").singeltone();
+
+```
+
+### Module
+
+Module - это контейнер пользовательских instances, и на основе которого пользователь может создавать свои модули. Пользователь в своем модуле должен реализовать метод `void builder(Scope currentScope)`.
+
+
+Пример:
+
+```dart
+class AppModule extends Module {
+  @override
+  void builder(Scope currentScope) {
+    bind<ApiClient>().toInstance(ApiClientMock());
+  }
+}
+```
+
+### Scope
+
+Scope - это контейнер, который хранит все дерево зависимостей (scope,modules,instances).
+Через scope можно получить доступ к `instance`, для этого нужно вызвать метод `resolve<T>()` и указать тип объекта, а так же можно передать дополнительные параметры.
+
+Пример:
+
+```dart
+    // открыть главный scope
+    final rootScope =  DartDi.openRootScope();
+
+    // инициализация scope пользовательским модулем
+    rootScope.installModules([AppModule()]);
+
+    // получаем экземпляр класса 
+    final str = rootScope.resolve<String>();
+    // или
+    final str = rootScope.tryResolve<String>();
+
+    // закрыть главный scope
+    DartDi.closeRootScope();
+```
+
+## Пример приложения
+
+
+```dart
+import 'dart:async';
+import 'package:meta/meta.dart';
+import 'package:dart_di/experimental/scope.dart';
+import 'package:dart_di/experimental/module.dart';
+
+class AppModule extends Module {
+  @override
+  void builder(Scope currentScope) {
+    bind<ApiClient>().withName("apiClientMock").toInstance(ApiClientMock());
+    bind<ApiClient>().withName("apiClientImpl").toInstance(ApiClientImpl());
+  }
+}
+
+class FeatureModule extends Module {
+  bool isMock;
+
+  FeatureModule({required this.isMock});
+
+  @override
+  void builder(Scope currentScope) {
+    bind<DataRepository>()
+        .withName("networkRepo")
+        .toProvide(
+          () => NetworkDataRepository(
+            currentScope.resolve<ApiClient>(
+              named: isMock ? "apiClientMock" : "apiClientImpl",
+            ),
+          ),
+        )
+        .singeltone();
+    bind<DataBloc>().toProvide(
+      () => DataBloc(
+        currentScope.resolve<DataRepository>(named: "networkRepo"),
+      ),
+    );
+  }
+}
+
+void main() async {
+  final scope = openRootScope().installModules([
+    AppModule(),
+  ]);
+
+  final subScope = scope
+      .openSubScope("featureScope")
+      .installModules([FeatureModule(isMock: true)]);
+
+  final dataBloc = subScope.resolve<DataBloc>();
+  dataBloc.data.listen((d) => print('Received data: $d'),
+      onError: (e) => print('Error: $e'), onDone: () => print('DONE'));
+
+  await dataBloc.fetchData();
+}
+
+class DataBloc {
+  final DataRepository _dataRepository;
+
+  Stream<String> get data => _dataController.stream;
+  StreamController<String> _dataController = new StreamController.broadcast();
+
+  DataBloc(this._dataRepository);
+
+  Future<void> fetchData() async {
+    try {
+      _dataController.sink.add(await _dataRepository.getData());
+    } catch (e) {
+      _dataController.sink.addError(e);
+    }
+  }
+
+  void dispose() {
+    _dataController.close();
+  }
+}
+
+abstract class DataRepository {
+  Future<String> getData();
+}
+
+class NetworkDataRepository implements DataRepository {
+  final ApiClient _apiClient;
+  final _token = 'token';
+
+  NetworkDataRepository(this._apiClient);
+
+  @override
+  Future<String> getData() async => await _apiClient.sendRequest(
+      url: 'www.google.com', token: _token, requestBody: {'type': 'data'});
+}
+
+abstract class ApiClient {
+  Future sendRequest({@required String url, String token, Map requestBody});
+}
+
+class ApiClientMock implements ApiClient {
+  @override
+  Future sendRequest(
+      {@required String? url, String? token, Map? requestBody}) async {
+    return 'Local Data';
+  }
+}
+
+class ApiClientImpl implements ApiClient {
+  @override
+  Future sendRequest(
+      {@required String? url, String? token, Map? requestBody}) async {
+    return 'Network data';
+  }
+}
+```

example/bin/main.dart

@@ -1,15 +1,51 @@
 import 'dart:async';
 import 'package:meta/meta.dart';
-import 'package:dart_di/dart_di.dart';
+import 'package:dart_di/scope.dart';
+import 'package:dart_di/module.dart';
+
+class AppModule extends Module {
+  @override
+  void builder(Scope currentScope) {
+    bind<ApiClient>().withName("apiClientMock").toInstance(ApiClientMock());
+    bind<ApiClient>().withName("apiClientImpl").toInstance(ApiClientImpl());
+  }
+}
+
+class FeatureModule extends Module {
+  bool isMock;
+
+  FeatureModule({required this.isMock});
+
+  @override
+  void builder(Scope currentScope) {
+    bind<DataRepository>()
+        .withName("networkRepo")
+        .toProvide(
+          () => NetworkDataRepository(
+            currentScope.resolve<ApiClient>(
+              named: isMock ? "apiClientMock" : "apiClientImpl",
+            ),
+          ),
+        )
+        .singeltone();
+    bind<DataBloc>().toProvide(
+      () => DataBloc(
+        currentScope.resolve<DataRepository>(named: "networkRepo"),
+      ),
+    );
+  }
+}
 
 void main() async {
-  final dataModule = new DiContainer()
-    ..bind<ApiClient>().toValue(new ApiClientMock())
-    ..bind<DataRepository>()
-        .toFactory1<ApiClient>((c) => new NetworkDataRepository(c))
-    ..bind<DataBloc>().toFactory1<DataRepository>((s) => new DataBloc(s));
+  final scope = openRootScope().installModules([
+    AppModule(),
+  ]);
 
-  final dataBloc = dataModule.resolve<DataBloc>();
+  final subScope = scope
+      .openSubScope("featureScope")
+      .installModules([FeatureModule(isMock: true)]);
+
+  final dataBloc = subScope.resolve<DataBloc>();
   dataBloc.data.listen((d) => print('Received data: $d'),
       onError: (e) => print('Error: $e'), onDone: () => print('DONE'));
 
@@ -59,7 +95,15 @@ abstract class ApiClient {
 class ApiClientMock implements ApiClient {
   @override
   Future sendRequest(
-      {@required String url, String token, Map requestBody}) async {
-    return 'hello world';
+      {@required String? url, String? token, Map? requestBody}) async {
+    return 'Local Data';
+  }
+}
+
+class ApiClientImpl implements ApiClient {
+  @override
+  Future sendRequest(
+      {@required String? url, String? token, Map? requestBody}) async {
+    return 'Network data';
   }
 }

example/pubspec.yaml

@@ -1,10 +1,10 @@
 name: example
 version: 1.0.0
 author: "Sergey Penkovsky <sergey.penkovsky@gmail.com>"
-homepage:
+homepage: localhost
 
 environment:
-  sdk: ">=2.2.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 
 dependencies:
@@ -12,3 +12,4 @@ dependencies:
     path: ../
 
 dev_dependencies:
+  test: ^1.16.8

lib/binding.dart

@@ -0,0 +1,117 @@
+/**
+ * Copyright 2021 Sergey Penkovsky <sergey.penkovsky@gmail.com>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+enum Mode { SIMPLE, INSTANCE, PROVIDER_INSTANCE }
+
+/// RU: Класс Binding<T> настраивает параметры экземпляра.
+/// ENG: The Binding<T> class configures the settings for the instance.
+///
+class Binding<T> {
+  late Mode _mode;
+  late Type _key;
+  late String _name;
+  T? _instance = null;
+  T? Function()? _provider = null;
+  late bool _isSingeltone = false;
+  late bool _isNamed = false;
+
+  Binding() {
+    _mode = Mode.SIMPLE;
+    _key = T;
+  }
+
+  /// RU: Метод возвращает [Mode] экземпляра.
+  /// ENG: The method returns the [Mode] of the instance.
+  ///
+  /// return [Mode]
+  Mode get mode => _mode;
+
+  /// RU: Метод возвращает тип экземпляра.
+  /// ENG: The method returns the type of the instance.
+  ///
+  /// return [Type]
+  Type get key => _key;
+
+  /// RU: Метод возвращает имя экземпляра.
+  /// ENG: The method returns the name of the instance.
+  ///
+  /// return [String]
+  String get name => _name;
+
+  /// RU: Метод проверяет сингелтон экземпляр или нет.
+  /// ENG: The method checks the singleton instance or not.
+  ///
+  /// return [bool]
+  bool get isSingeltone => _isSingeltone;
+
+  /// RU: Метод проверяет именован экземпляр или нет.
+  /// ENG: The method checks whether the instance is named or not.
+  ///
+  /// return [bool]
+  bool get isNamed => _isNamed;
+
+  /// RU: Добавляет имя для экземляпя [value].
+  /// ENG: Added name for instance [value].
+  ///
+  /// return [Binding]
+  Binding<T> withName(String name) {
+    _name = name;
+    _isNamed = true;
+    return this;
+  }
+
+  /// RU: Инициализация экземляпяра [value].
+  /// ENG: Initialization instance [value].
+  ///
+  /// return [Binding]
+  Binding<T> toInstance(T value) {
+    _mode = Mode.INSTANCE;
+    _instance = value;
+    _isSingeltone = true;
+    return this;
+  }
+
+  /// RU: Инициализация экземляпяра  через провайдер [value].
+  /// ENG: Initialization instance via provider [value].
+  ///
+  /// return [Binding]
+  Binding<T> toProvide(T Function() value) {
+    _mode = Mode.PROVIDER_INSTANCE;
+    _provider = value;
+    return this;
+  }
+
+  /// RU: Инициализация экземляпяра  как сингелтон [value].
+  /// ENG: Initialization instance as a singelton [value].
+  ///
+  /// return [Binding]
+  Binding<T> singeltone() {
+    if (_mode == Mode.PROVIDER_INSTANCE) {
+      _instance = _provider?.call();
+    }
+    _isSingeltone = true;
+    return this;
+  }
+
+  /// RU: Поиск экземпляра.
+  /// ENG: Resolve instance.
+  ///
+  /// return [T]
+  T? get instance => _instance;
+
+  /// RU: Поиск экземпляра.
+  /// ENG: Resolve instance.
+  ///
+  /// return [T]
+  T? get provider => _provider?.call();
+}

lib/dart_di.dart

@@ -1,5 +1,19 @@
+/**
+ * Copyright 2021 Sergey Penkovsky <sergey.penkovsky@gmail.com>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 library dart_di;
 
-export 'package:dart_di/di_container.dart';
-export 'package:dart_di/resolvers/resolvers.dart';
-export 'package:dart_di/resolvers/resolving_context.dart';
+export 'package:dart_di/scope.dart';
+export 'package:dart_di/module.dart';
+export 'package:dart_di/binding.dart';
+export 'package:dart_di/di.dart';

lib/di.dart

@@ -0,0 +1,38 @@
+/**
+ * Copyright 2021 Sergey Penkovsky <sergey.penkovsky@gmail.com>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import 'package:dart_di/scope.dart';
+
+Scope? _rootScope = null;
+
+class DartDi {
+  /// RU: Метод открывает главный [Scope].
+  /// ENG: The method opens the main [Scope].
+  ///
+  /// return
+  static Scope openRootScope() {
+    if (_rootScope == null) {
+      _rootScope = Scope(null);
+    }
+    return _rootScope!;
+  }
+
+  /// RU: Метод закрывает главный [Scope].
+  /// ENG: The method close the main [Scope].
+  ///
+  ///
+  static void closeRootScope() {
+    if (_rootScope != null) {
+      _rootScope = null;
+    }
+  }
+}

lib/di_container.dart

@@ -1,75 +0,0 @@
-import 'package:dart_di/resolvers/resolving_context.dart';
-
-/**
- * Контейнер - это объект, которой хранит все резолверы зависимостей.
- */
-class DiContainer {
-  final DiContainer _parent;
-
-  final _resolvers = <Type, ResolvingContext>{};
-
-  DiContainer([this._parent]);
-
-/**
-     * Добавляет resolver зависимостей типа [T] в контейнер.
-     * Обратите внимание, что перезапись значений внутри одного контейнера запрещена.
-     * @return - возвращает [ResolvingContext] или [StateError]
-     */
-  ResolvingContext<T> bind<T>() {
-    var context = ResolvingContext<T>(this);
-    if (hasInTree<T>()) {
-      throw StateError(
-          'Dependency of type `$T` is already exist in containers tree');
-    }
-
-    _resolvers[T] = context;
-    return context;
-  }
-
-  /**
-     * Возвращает разрешенную зависимость, определенную параметром типа [T].
-     * Выдает [StateError], если зависимость не может быть разрешена.
-     * Если вы хотите получить [null], если зависимость не может быть разрешена,
-     * то используйте вместо этого [tryResolve]
-     * @return - возвращает объект типа [T]  или [StateError]
-     */
-  T resolve<T>() {
-    var resolved = tryResolve<T>();
-    if (resolved != null) {
-      return resolved;
-    } else {
-      throw StateError(
-          'Can\'t resolve dependency `$T`. Maybe you forget register it?');
-    }
-  }
-
-  /**
-     * Возвращает разрешенную зависимость типа [T] или null, если она не может быть разрешена.
-     */
-  T tryResolve<T>() {
-    var resolver = _resolvers[T];
-    if (resolver != null) {
-      return resolver.resolve();
-    } else {
-      return _parent?.tryResolve<T>();
-    }
-  }
-
-  /**
-     * Возвращает true, если у этого контейнера есть средство разрешения зависимостей для типа [T].
-     * Если вы хотите проверить его для всего дерева контейнеров, используйте вместо него [hasInTree].
-     * @return - возвращает булево значение
-     */
-  bool has<T>() {
-    return _resolvers.containsKey(T);
-  }
-
-/**
-     * Возвращает true, если контейнер или его родители содержат средство разрешения зависимостей для типа [T].
-     * Если вы хотите проверить его только для этого контейнера, используйте вместо него [has].
-     * @return - возвращает булево значение
-     */
-  bool hasInTree<T>() {
-    return has<T>() || (_parent != null && _parent.hasInTree<T>());
-  }
-}

lib/factory.dart

@@ -0,0 +1,18 @@
+/**
+ * Copyright 2021 Sergey Penkovsky <sergey.penkovsky@gmail.com>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import 'package:dart_di/scope.dart';
+
+abstract class Factory<T> {
+  T createInstance(Scope scope);
+}

lib/module.dart

@@ -0,0 +1,54 @@
+/**
+ * Copyright 2021 Sergey Penkovsky <sergey.penkovsky@gmail.com>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import 'dart:collection';
+
+import 'package:dart_di/binding.dart';
+import 'package:dart_di/scope.dart';
+
+/// RU: Класс Module является основой для пользовательских модулей.
+///  Этот класс нужен для инициализации [Scope].
+///
+/// RU: The Module class is the basis for custom modules.
+/// This class is needed to initialize [Scope].
+///
+abstract class Module {
+  final Set<Binding> _bindingSet = HashSet();
+
+  /// RU: Метод добавляет в коллекцию модуля [Binding] экземпляр.
+  ///
+  /// ENG: The method adds an instance to the collection of the [Binding] module.
+  ///
+  /// return [Binding<T>]
+  Binding<T> bind<T>() {
+    final binding = Binding<T>();
+    _bindingSet.add(binding);
+    return binding;
+  }
+
+  /// RU: Метод возвращает коллекцию [Binding] экземпляров.
+  ///
+  /// ENG: The method returns a collection of [Binding] instances.
+  ///
+  /// return [Set<Binding>]
+  Set<Binding> get bindingSet => _bindingSet;
+
+  /// RU: Абстрактный метод для инициализации пользовательских экземпляров.
+  /// В этом методе осуществляется конфигурация зависимостей.
+  ///
+  /// ENG: Abstract method for initializing custom instances.
+  /// This method configures dependencies.
+  ///
+  /// return [void]
+  void builder(Scope currentScope);
+}

lib/resolvers/factory_resolver.dart

@@ -1,15 +0,0 @@
-import 'package:dart_di/resolvers/resolver.dart';
-
-/**
- * Разрешает зависимость для фабричной функции
- */
-class FactoryResolver<T> extends Resolver<T> {
-  final T Function() _factory;
-
-  FactoryResolver(this._factory);
-
-  @override
-  T resolve() {
-    return _factory();
-  }
-}

lib/resolvers/resolver.dart

@@ -1,11 +0,0 @@
-/**
- * Resolver - это абстракция, которая определяет,
- * как контейнер будет разрешать зависимость
- */
-abstract class Resolver<T> {
-  /**
-     * Разрешает зависимость типа [T]
-     * @return - возвращает объект типа [T]
-     */
-  T resolve();
-}

lib/resolvers/resolvers.dart

@@ -1,7 +0,0 @@
-/// Resolvers определяет, как разрешить зависимость для контейнера
-library resolvers;
-
-export 'resolver.dart';
-export 'factory_resolver.dart';
-export 'value_resolver.dart';
-export 'singelton_resolver.dart';

lib/resolvers/resolving_context.dart

@@ -1,170 +0,0 @@
-import 'package:dart_di/di_container.dart';
-import 'package:dart_di/resolvers/factory_resolver.dart';
-import 'package:dart_di/resolvers/resolver.dart';
-import 'package:dart_di/resolvers/singelton_resolver.dart';
-import 'package:dart_di/resolvers/value_resolver.dart';
-
-class ResolvingContext<T> extends Resolver {
-  /// Корневой резолвер
-  Resolver<T> get resolver => _resolver;
-
-  DiContainer _container;
-
-  Resolver _resolver;
-
-  ResolvingContext(this._container);
-
-/**
-     * Разрешает зависимость типа [T]
-     * @return - возвращает объект типа [T]
-     */
-  @override
-  T resolve() {
-    _verify();
-    return _resolver?.resolve();
-  }
-
-  /**
-     * Добавляет резолвер в качестве корневого резолвера
-     * С помощью этого метода вы можете добавить любой
-     * пользовательский резолвер
-     */
-  ResolvingContext<T> toResolver<TImpl extends T>(Resolver<TImpl> resolver) {
-    _resolver = resolver;
-    return this;
-  }
-
-  /**
-     *  Создать резолвер значения
-     */
-  ResolvingContext<T> toValue<TImpl extends T>(T value) {
-    Resolver<TImpl> resolver = ValueResolver(value);
-    return toResolver<TImpl>(resolver);
-  }
-
-  /**
-     * Преобразователь в сингелтон
-     */
-  ResolvingContext<T> asSingleton() {
-    return toResolver(SingletonResolver<T>(resolver));
-  }
-
-  /**
-     * Создать фабричный resolver без каких-либо зависимостей
-     */
-  ResolvingContext<T> toFactory<TImpl extends T>(TImpl Function() factory) {
-    Resolver<TImpl> resolver = FactoryResolver<TImpl>(factory);
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 1 зависимостью от контейнера
-     */
-  ResolvingContext<T> toFactory1<T1>(T Function(T1) factory) {
-    Resolver<T> resolver =
-        FactoryResolver<T>(() => factory(_container.resolve<T1>()));
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 2 зависимостями от контейнера
-     */
-  ResolvingContext<T> toFactory2<T1, T2>(T Function(T1, T2) factory) {
-    Resolver<T> resolver = FactoryResolver<T>(
-        () => factory(_container.resolve<T1>(), _container.resolve<T2>()));
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 3 зависимостями от контейнера
-     */
-  ResolvingContext<T> toFactory3<T1, T2, T3>(T Function(T1, T2, T3) factory) {
-    Resolver<T> resolver = FactoryResolver<T>(() => factory(
-        _container.resolve<T1>(),
-        _container.resolve<T2>(),
-        _container.resolve<T3>()));
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 4 зависимостями от контейнера
-     */
-  ResolvingContext<T> toFactory4<T1, T2, T3, T4>(
-      T Function(T1, T2, T3, T4) factory) {
-    Resolver<T> resolver = FactoryResolver<T>(() => factory(
-        _container.resolve<T1>(),
-        _container.resolve<T2>(),
-        _container.resolve<T3>(),
-        _container.resolve<T4>()));
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 5 зависимостями от контейнера
-     */
-  ResolvingContext<T> toFactory5<T1, T2, T3, T4, T5>(
-      T Function(T1, T2, T3, T4, T5) factory) {
-    Resolver<T> resolver = FactoryResolver<T>(() => factory(
-        _container.resolve<T1>(),
-        _container.resolve<T2>(),
-        _container.resolve<T3>(),
-        _container.resolve<T4>(),
-        _container.resolve<T5>()));
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 6 зависимостями от контейнера
-     */
-  ResolvingContext<T> toFactory6<T1, T2, T3, T4, T5, T6>(
-      T Function(T1, T2, T3, T4, T5, T6) factory) {
-    Resolver<T> resolver = FactoryResolver<T>(() => factory(
-        _container.resolve<T1>(),
-        _container.resolve<T2>(),
-        _container.resolve<T3>(),
-        _container.resolve<T4>(),
-        _container.resolve<T5>(),
-        _container.resolve<T6>()));
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 7 зависимостями от контейнера
-     */
-  ResolvingContext<T> toFactory7<T1, T2, T3, T4, T5, T6, T7>(
-      T Function(T1, T2, T3, T4, T5, T6, T7) factory) {
-    Resolver<T> resolver = FactoryResolver<T>(() => factory(
-        _container.resolve<T1>(),
-        _container.resolve<T2>(),
-        _container.resolve<T3>(),
-        _container.resolve<T4>(),
-        _container.resolve<T5>(),
-        _container.resolve<T6>(),
-        _container.resolve<T7>()));
-    return toResolver(resolver);
-  }
-
-  /**
-     * Создать фабричный resolver с 8 зависимостями от контейнера
-     */
-  ResolvingContext<T> toFactory8<T1, T2, T3, T4, T5, T6, T7, T8>(
-      T Function(T1, T2, T3, T4, T5, T6, T7, T8) factory) {
-    Resolver<T> resolver = FactoryResolver<T>(() => factory(
-        _container.resolve<T1>(),
-        _container.resolve<T2>(),
-        _container.resolve<T3>(),
-        _container.resolve<T4>(),
-        _container.resolve<T5>(),
-        _container.resolve<T6>(),
-        _container.resolve<T7>(),
-        _container.resolve<T8>()));
-    return toResolver(resolver);
-  }
-
-  void _verify() {
-    if (_resolver == null) {
-      throw StateError("Can\'t resolve T without any resolvers. " +
-          "Please check, may be you didn\'t do anything after bind()");
-    }
-  }
-}

lib/resolvers/singelton_resolver.dart

@@ -1,16 +0,0 @@
-import 'package:dart_di/resolvers/resolver.dart';
-
-class SingletonResolver<T> extends Resolver<T> {
-  Resolver<T> _decoratedResolver;
-  T _value = null;
-
-  SingletonResolver(this._decoratedResolver);
-
-  @override
-  T resolve() {
-    if (_value == null) {
-      _value = _decoratedResolver.resolve();
-    }
-    return _value;
-  }
-}

lib/resolvers/value_resolver.dart

@@ -1,15 +0,0 @@
-import 'package:dart_di/resolvers/resolver.dart';
-
-/**
- * Разрешает зависимость для значения
- */
-class ValueResolver<T> extends Resolver<T> {
-  T _value;
-
-  ValueResolver(this._value);
-
-  @override
-  T resolve() {
-    return _value;
-  }
-}

lib/scope.dart

@@ -0,0 +1,129 @@
+/**
+ * Copyright 2021 Sergey Penkovsky <sergey.penkovsky@gmail.com>
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import 'dart:collection';
+
+import 'package:dart_di/binding.dart';
+import 'package:dart_di/module.dart';
+
+Scope openRootScope() => Scope(null);
+
+class Scope {
+  final Scope? _parentScope;
+
+  /// RU: Метод возвращает родительский [Scope].
+  ///
+  /// ENG: The method returns the parent [Scope].
+  ///
+  /// return [Scope]
+  Scope? get parentScope => _parentScope;
+
+  final Map<String, Scope> _scopeMap = HashMap();
+
+  Scope(this._parentScope);
+
+  final Set<Module> _modulesList = HashSet();
+
+  /// RU: Метод открывает дочерний (дополнительный) [Scope].
+  ///
+  /// ENG: The method opens child (additional) [Scope].
+  ///
+  /// return [Scope]
+  Scope openSubScope(String name) {
+    if (!_scopeMap.containsKey(name)) {
+      _scopeMap[name] = Scope(this);
+    }
+    return _scopeMap[name]!;
+  }
+
+  /// RU: Метод закрывает дочерний (дополнительный) [Scope].
+  ///
+  /// ENG: The method closes child (additional) [Scope].
+  ///
+  /// return [Scope]
+  void closeSubScope(String name) {
+    _scopeMap.remove(name);
+  }
+
+  /// RU: Метод инициализирует пользовательские модули в  [Scope].
+  ///
+  /// ENG: The method initializes custom modules in [Scope].
+  ///
+  /// return [Scope]
+  Scope installModules(List<Module> modules) {
+    _modulesList.addAll(modules);
+    modules.forEach((module) => module.builder(this));
+    return this;
+  }
+
+  /// RU: Метод удаляет пользовательские модули из [Scope].
+  ///
+  /// ENG: This method removes custom modules from [Scope].
+  ///
+  /// return [Scope]
+  Scope dropModules() {
+    _modulesList.removeAll(_modulesList);
+    return this;
+  }
+
+  /// RU: Возвращает найденную зависимость, определенную параметром типа [T].
+  /// Выдает [StateError], если зависимость не может быть разрешена.
+  /// Если вы хотите получить [null], если зависимость не может быть найдена,
+  /// то используйте вместо этого [tryResolve]
+  /// return - возвращает объект типа [T]  или [StateError]
+  ///
+  /// ENG: Returns the found dependency specified by the type parameter [T].
+  /// Throws [StateError] if the dependency cannot be resolved.
+  /// If you want to get [null] if the dependency cannot be found then use [tryResolve] instead
+  /// return - returns an object of type [T] or [StateError]
+  ///
+  T resolve<T>({String? named}) {
+    var resolved = tryResolve<T>(named: named);
+    if (resolved != null) {
+      return resolved;
+    } else {
+      throw StateError(
+          'Can\'t resolve dependency `$T`. Maybe you forget register it?');
+    }
+  }
+
+  /// RU: Возвращает найденную зависимость типа [T] или null, если она не может быть найдена.
+  /// ENG: Returns found dependency of type [T] or null if it cannot be found.
+  ///
+  T? tryResolve<T>({String? named}) {
+    // 1 Поиск зависимости по всем модулям текущего скоупа
+    if (_modulesList.isNotEmpty) {
+      for (Module module in _modulesList) {
+        for (Binding binding in module.bindingSet) {
+          if (binding.key == T &&
+              ((!binding.isNamed && named == null) ||
+                  (binding.isNamed && named == binding.name))) {
+            switch (binding.mode) {
+              case Mode.INSTANCE:
+                return binding.instance;
+              case Mode.PROVIDER_INSTANCE:
+                return binding.isSingeltone
+                    ? binding.instance
+                    : binding.provider;
+              default:
+                return null;
+            }
+          }
+        }
+      }
+    }
+
+    // 2 Поиск зависимостей в родительском скоупе
+    return _parentScope != null ? _parentScope!.tryResolve(named: named) : null;
+  }
+}

pubspec.yaml

@@ -1,16 +1,16 @@
 name: dart_di
 description: Experimental Dependency Injection library.
-version: 0.0.1
+version: 0.1.0
 author: Sergey Penkovsky <sergey.penkovsky@gmail.com>
-homepage:
+homepage: locahost
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.12.0 <3.0.0"
 
 dependencies:
-  meta: ^1.1.8
+  meta: ^1.3.0
 
 dev_dependencies:
-  test: ^1.14.3
+  test: ^1.16.8
 
-  mockito: ^4.1.1
+  mockito: ^5.0.3

test/binding_test.dart

@@ -0,0 +1,296 @@
+import 'package:dart_di/binding.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group("Check instance.", () {
+    group("Without name.", () {
+      test("Binding resolves null", () {
+        final binding = Binding<int>();
+        expect(binding.instance, null);
+      });
+
+      test("Binding check mode", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toInstance(expectedValue);
+
+        expect(binding.mode, Mode.INSTANCE);
+      });
+
+      test("Binding check singeltone", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toInstance(expectedValue);
+
+        expect(binding.isSingeltone, true);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toInstance(expectedValue);
+
+        expect(binding.instance, expectedValue);
+      });
+
+      test("Binding resolves value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toInstance(expectedValue);
+        expect(binding.instance, expectedValue);
+      });
+    });
+
+    group("With name.", () {
+      test("Binding resolves null", () {
+        final binding = Binding<int>().withName("expectedValue");
+        expect(binding.instance, null);
+      });
+
+      test("Binding check mode", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().withName("expectedValue").toInstance(expectedValue);
+
+        expect(binding.mode, Mode.INSTANCE);
+      });
+
+      test("Binding check key", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().withName("expectedValue").toInstance(expectedValue);
+
+        expect(binding.key, int);
+      });
+
+      test("Binding check singeltone", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().withName("expectedValue").toInstance(expectedValue);
+
+        expect(binding.isSingeltone, true);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().withName("expectedValue").toInstance(expectedValue);
+
+        expect(binding.instance, expectedValue);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().withName("expectedValue").toInstance(expectedValue);
+
+        expect(binding.name, "expectedValue");
+      });
+
+      test("Binding resolves value", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().withName("expectedValue").toInstance(expectedValue);
+        expect(binding.instance, expectedValue);
+      });
+    });
+  });
+
+  group("Check provide.", () {
+    group("Without name.", () {
+      test("Binding resolves null", () {
+        final binding = Binding<int>();
+        expect(binding.provider, null);
+      });
+
+      test("Binding check mode", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toProvide(() => expectedValue);
+
+        expect(binding.mode, Mode.PROVIDER_INSTANCE);
+      });
+
+      test("Binding check singeltone", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toProvide(() => expectedValue);
+
+        expect(binding.isSingeltone, false);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toProvide(() => expectedValue);
+
+        expect(binding.provider, expectedValue);
+      });
+
+      test("Binding resolves value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>().toProvide(() => expectedValue);
+        expect(binding.provider, expectedValue);
+      });
+    });
+
+    group("With name.", () {
+      test("Binding resolves null", () {
+        final binding = Binding<int>().withName("expectedValue");
+        expect(binding.provider, null);
+      });
+
+      test("Binding check mode", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue);
+
+        expect(binding.mode, Mode.PROVIDER_INSTANCE);
+      });
+
+      test("Binding check key", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue);
+
+        expect(binding.key, int);
+      });
+
+      test("Binding check singeltone", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue);
+
+        expect(binding.isSingeltone, false);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue);
+
+        expect(binding.provider, expectedValue);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue);
+
+        expect(binding.name, "expectedValue");
+      });
+
+      test("Binding resolves value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue);
+        expect(binding.provider, expectedValue);
+      });
+    });
+  });
+
+  group("Check singeltone provide.", () {
+    group("Without name.", () {
+      test("Binding resolves null", () {
+        final binding = Binding<int>().singeltone();
+        expect(binding.provider, null);
+      });
+
+      test("Binding check mode", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().toProvide(() => expectedValue).singeltone();
+
+        expect(binding.mode, Mode.PROVIDER_INSTANCE);
+      });
+
+      test("Binding check singeltone", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().toProvide(() => expectedValue).singeltone();
+
+        expect(binding.isSingeltone, true);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().toProvide(() => expectedValue).singeltone();
+
+        expect(binding.provider, expectedValue);
+      });
+
+      test("Binding resolves value", () {
+        final expectedValue = 5;
+        final binding =
+            Binding<int>().toProvide(() => expectedValue).singeltone();
+        expect(binding.provider, expectedValue);
+      });
+    });
+
+    group("With name.", () {
+      test("Binding resolves null", () {
+        final binding = Binding<int>().withName("expectedValue").singeltone();
+        expect(binding.provider, null);
+      });
+
+      test("Binding check mode", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue)
+            .singeltone();
+
+        expect(binding.mode, Mode.PROVIDER_INSTANCE);
+      });
+
+      test("Binding check key", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue)
+            .singeltone();
+
+        expect(binding.key, int);
+      });
+
+      test("Binding check singeltone", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue)
+            .singeltone();
+
+        expect(binding.isSingeltone, true);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue)
+            .singeltone();
+
+        expect(binding.provider, expectedValue);
+      });
+
+      test("Binding check value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue)
+            .singeltone();
+
+        expect(binding.name, "expectedValue");
+      });
+
+      test("Binding resolves value", () {
+        final expectedValue = 5;
+        final binding = Binding<int>()
+            .withName("expectedValue")
+            .toProvide(() => expectedValue)
+            .singeltone();
+        expect(binding.provider, expectedValue);
+      });
+    });
+  });
+}

test/di_container_test.dart

@@ -1,458 +0,0 @@
-import 'package:dart_di/di_container.dart';
-import 'package:dart_di/resolvers/resolver.dart';
-import 'package:test/test.dart';
-import 'package:mockito/mockito.dart';
-
-void main() {
-  group('Without parent', () {
-    test('Container bind<T> throws state error if it\'s already has resolver',
-        () {
-      final container = new DiContainer();
-      container.bind<int>().toResolver(_makeResolver(5));
-
-      expect(() => container.bind<int>().toResolver(_makeResolver(3)),
-          throwsA(isA<StateError>()));
-    });
-
-    test("Container resolves value after adding a dependency", () {
-      final expectedValue = 3;
-      final container = new DiContainer();
-      container.bind<int>().toResolver(_makeResolver(expectedValue));
-      expect(container.resolve<int>(), expectedValue);
-    });
-
-    test("Container throws state error if the value can't be resolved", () {
-      final container = DiContainer();
-      expect(() => container.resolve<int>(), throwsA(isA<StateError>()));
-    });
-
-    test("Container has() returns true if it has resolver", () {
-      final expectedValue = 5;
-      final container = new DiContainer();
-      container.bind<int>().toResolver(_makeResolver(expectedValue));
-      expect(container.has<int>(), true);
-    });
-
-    test("Container has() returns false if it hasn't resolver", () {
-      final container = new DiContainer();
-      expect(container.has<int>(), false);
-    });
-
-    test("Container hasInTree() returns true if it has resolver", () {
-      final expectedValue = 5;
-      final container = DiContainer();
-      container.bind<int>().toResolver(_makeResolver(expectedValue));
-      expect(container.hasInTree<int>(), true);
-    });
-
-    test("Container hasInTree() returns true if it hasn`t resolver", () {
-      final container = DiContainer();
-      expect(container.hasInTree<int>(), false);
-    });
-  });
-
-  group('With parent', () {
-    test(
-        "Container bind() throws state error (if it's parent already has a resolver)",
-        () {
-      final parentContainer = new DiContainer();
-      final container = new DiContainer(parentContainer);
-
-      parentContainer.bind<int>().toResolver(_makeResolver(5));
-
-      expect(() => container.bind<int>().toResolver(_makeResolver(3)),
-          throwsA(isA<StateError>()));
-    });
-
-    test("Container resolve() returns a value from parent container", () {
-      final expectedValue = 5;
-      final parentContainer = DiContainer();
-      final container = DiContainer(parentContainer);
-
-      parentContainer.bind<int>().toResolver(_makeResolver(expectedValue));
-
-      expect(container.resolve<int>(), expectedValue);
-    });
-
-    test("Container resolve() returns a  several value from parent container",
-        () {
-      final expectedIntValue = 5;
-      final expectedStringValue = "Hello world";
-      final parentContainer = DiContainer();
-      final container = DiContainer(parentContainer);
-
-      parentContainer.bind<int>().toResolver(_makeResolver(expectedIntValue));
-      parentContainer
-          .bind<String>()
-          .toResolver(_makeResolver(expectedStringValue));
-
-      expect(container.resolve<int>(), expectedIntValue);
-      expect(container.resolve<String>(), expectedStringValue);
-    });
-
-    test("Container resolve() throws a state error if parent hasn't value too",
-        () {
-      final parentContainer = DiContainer();
-      final container = DiContainer(parentContainer);
-      expect(() => container.resolve<int>(), throwsA(isA<StateError>()));
-    });
-
-    test("Container has() returns false if parent has a resolver", () {
-      final parentContainer = DiContainer();
-      final container = DiContainer(parentContainer);
-
-      parentContainer.bind<int>().toResolver(_makeResolver(5));
-
-      expect(container.has<int>(), false);
-    });
-
-    test("Container has() returns false if parent hasn't a resolver", () {
-      final parentContainer = DiContainer();
-      final container = DiContainer(parentContainer);
-
-      expect(container.has<int>(), false);
-    });
-
-    test("Container hasInTree() returns true if parent has a resolver", () {
-      final parentContainer = DiContainer();
-      final container = DiContainer(parentContainer);
-
-      parentContainer.bind<int>().toResolver(_makeResolver(5));
-
-      expect(container.hasInTree<int>(), true);
-    });
-
-    test("Test asSingelton", () {
-      final expectedIntValue = 10;
-      final containerA = DiContainer();
-      final containerB = DiContainer(containerA);
-
-      containerA.bind<int>().toValue(expectedIntValue).asSingleton();
-
-      expect(containerB.resolve<int>(), expectedIntValue);
-    });
-
-    test("Child container can resolve parent container's value", () {
-      final containerA = DiContainer();
-      final a = AA();
-      containerA.bind<A>().toValue(a);
-
-      final containerB = DiContainer(containerA);
-      final containerC = DiContainer(containerB);
-      expect(containerC.resolve<A>(), a);
-    });
-  });
-
-  test("Bind to the factory resolves with value", () {
-    final container = DiContainer();
-    final a = AA();
-    container.bind<A>().toFactory(() => a);
-
-    expect(container.resolve<A>(), a);
-  });
-
-  test("Bind to the factory resolves with value", () {
-    final container = DiContainer();
-    final a = AA();
-    container.bind<A>().toValue(a);
-    container.bind<DependOnA>().toFactory1<A>((a) => DependOnA(a));
-
-    expect(container.resolve<DependOnA>().a, a);
-  });
-
-  test("Bind to the factory resolves with 2 value", () {
-    final container = DiContainer();
-    final a = AA();
-    final b = BB();
-    container.bind<A>().toValue(a);
-    container.bind<B>().toValue(b);
-    container.bind<DependOnAB>().toFactory2<A, B>((a, b) => DependOnAB(a, b));
-
-    expect(container.resolve<DependOnAB>().a, a);
-    expect(container.resolve<DependOnAB>().b, b);
-  });
-
-  test("Bind to the factory resolves with 3 value", () {
-    final container = DiContainer();
-    final a = AA();
-    final b = BB();
-    final c = CC();
-    container.bind<A>().toValue(a);
-    container.bind<B>().toValue(b);
-    container.bind<C>().toValue(c);
-    container
-        .bind<DependOnABC>()
-        .toFactory3<A, B, C>((a, b, c) => DependOnABC(a, b, c));
-
-    expect(container.resolve<DependOnABC>().a, a);
-    expect(container.resolve<DependOnABC>().b, b);
-    expect(container.resolve<DependOnABC>().c, c);
-  });
-
-  test("Bind to the factory resolves with 4 value", () {
-    final container = DiContainer();
-    final a = AA();
-    final b = BB();
-    final c = CC();
-    final d = DD();
-    container.bind<A>().toValue(a);
-    container.bind<B>().toValue(b);
-    container.bind<C>().toValue(c);
-    container.bind<D>().toValue(d);
-    container
-        .bind<DependOnABCD>()
-        .toFactory4<A, B, C, D>((a, b, c, d) => DependOnABCD(a, b, c, d));
-
-    expect(container.resolve<DependOnABCD>().a, a);
-    expect(container.resolve<DependOnABCD>().b, b);
-    expect(container.resolve<DependOnABCD>().c, c);
-    expect(container.resolve<DependOnABCD>().d, d);
-  });
-
-  test("Bind to the factory resolves with 5 value", () {
-    final container = DiContainer();
-    final a = AA();
-    final b = BB();
-    final c = CC();
-    final d = DD();
-    final e = EE();
-    container.bind<A>().toValue(a);
-    container.bind<B>().toValue(b);
-    container.bind<C>().toValue(c);
-    container.bind<D>().toValue(d);
-    container.bind<E>().toValue(e);
-    container.bind<DependOnABCDE>().toFactory5<A, B, C, D, E>(
-        (a, b, c, d, e) => DependOnABCDE(a, b, c, d, e));
-
-    expect(container.resolve<DependOnABCDE>().a, a);
-    expect(container.resolve<DependOnABCDE>().b, b);
-    expect(container.resolve<DependOnABCDE>().c, c);
-    expect(container.resolve<DependOnABCDE>().d, d);
-    expect(container.resolve<DependOnABCDE>().e, e);
-  });
-
-  test("Bind to the factory resolves with 6 value", () {
-    final container = DiContainer();
-    final a = AA();
-    final b = BB();
-    final c = CC();
-    final d = DD();
-    final e = EE();
-    final f = FF();
-    container.bind<A>().toValue(a);
-    container.bind<B>().toValue(b);
-    container.bind<C>().toValue(c);
-    container.bind<D>().toValue(d);
-    container.bind<E>().toValue(e);
-    container.bind<F>().toValue(f);
-    container.bind<DependOnABCDEF>().toFactory6<A, B, C, D, E, F>(
-        (a, b, c, d, e, f) => DependOnABCDEF(a, b, c, d, e, f));
-
-    expect(container.resolve<DependOnABCDEF>().a, a);
-    expect(container.resolve<DependOnABCDEF>().b, b);
-    expect(container.resolve<DependOnABCDEF>().c, c);
-    expect(container.resolve<DependOnABCDEF>().d, d);
-    expect(container.resolve<DependOnABCDEF>().e, e);
-    expect(container.resolve<DependOnABCDEF>().f, f);
-  });
-
-  test("Bind to the factory resolves with 7 value", () {
-    final container = DiContainer();
-    final a = AA();
-    final b = BB();
-    final c = CC();
-    final d = DD();
-    final e = EE();
-    final f = FF();
-    final g = GG();
-    container.bind<A>().toValue(a);
-    container.bind<B>().toValue(b);
-    container.bind<C>().toValue(c);
-    container.bind<D>().toValue(d);
-    container.bind<E>().toValue(e);
-    container.bind<F>().toValue(f);
-    container.bind<G>().toValue(g);
-    container.bind<DependOnABCDEFG>().toFactory7<A, B, C, D, E, F, G>(
-        (a, b, c, d, e, f, g) => DependOnABCDEFG(a, b, c, d, e, f, g));
-
-    expect(container.resolve<DependOnABCDEFG>().a, a);
-    expect(container.resolve<DependOnABCDEFG>().b, b);
-    expect(container.resolve<DependOnABCDEFG>().c, c);
-    expect(container.resolve<DependOnABCDEFG>().d, d);
-    expect(container.resolve<DependOnABCDEFG>().e, e);
-    expect(container.resolve<DependOnABCDEFG>().f, f);
-    expect(container.resolve<DependOnABCDEFG>().g, g);
-  });
-
-  test("Bind to the factory resolves with 8 value", () {
-    final container = DiContainer();
-    final a = AA();
-    final b = BB();
-    final c = CC();
-    final d = DD();
-    final e = EE();
-    final f = FF();
-    final g = GG();
-    final h = HH();
-    container.bind<A>().toValue(a);
-    container.bind<B>().toValue(b);
-    container.bind<C>().toValue(c);
-    container.bind<D>().toValue(d);
-    container.bind<E>().toValue(e);
-    container.bind<F>().toValue(f);
-    container.bind<G>().toValue(g);
-    container.bind<H>().toValue(h);
-    container.bind<DependOnABCDEFGH>().toFactory8<A, B, C, D, E, F, G, H>(
-        (a, b, c, d, e, f, g, h) => DependOnABCDEFGH(a, b, c, d, e, f, g, h));
-
-    expect(container.resolve<DependOnABCDEFGH>().a, a);
-    expect(container.resolve<DependOnABCDEFGH>().b, b);
-    expect(container.resolve<DependOnABCDEFGH>().c, c);
-    expect(container.resolve<DependOnABCDEFGH>().d, d);
-    expect(container.resolve<DependOnABCDEFGH>().e, e);
-    expect(container.resolve<DependOnABCDEFGH>().f, f);
-    expect(container.resolve<DependOnABCDEFGH>().g, g);
-    expect(container.resolve<DependOnABCDEFGH>().h, h);
-  });
-}
-
-ResolverMock<T> _makeResolver<T>(T expectedValue) {
-  final resolverMock = new ResolverMock<T>();
-  when(resolverMock.resolve()).thenReturn(expectedValue);
-  return resolverMock;
-}
-
-class ResolverMock<T> extends Mock implements Resolver<T> {}
-
-abstract class A {}
-
-class AA implements A {}
-
-abstract class B {}
-
-class BB implements B {}
-
-abstract class C {}
-
-class CC implements C {}
-
-abstract class D {}
-
-class DD implements D {}
-
-abstract class E {}
-
-class EE implements E {}
-
-abstract class F {}
-
-class FF implements F {}
-
-abstract class G {}
-
-class GG implements G {}
-
-abstract class H {}
-
-class HH implements H {}
-
-class DependOnA {
-  final A a;
-
-  DependOnA(this.a) : assert(a != null);
-}
-
-class DependOnAB {
-  final A a;
-  final B b;
-
-  DependOnAB(this.a, this.b) : assert(a != null && b != null);
-}
-
-class DependOnABC {
-  final A a;
-  final B b;
-  final C c;
-
-  DependOnABC(this.a, this.b, this.c)
-      : assert(a != null && b != null && c != null);
-}
-
-class DependOnABCD {
-  final A a;
-  final B b;
-  final C c;
-  final D d;
-
-  DependOnABCD(this.a, this.b, this.c, this.d)
-      : assert(a != null && b != null && c != null && d != null);
-}
-
-class DependOnABCDE {
-  final A a;
-  final B b;
-  final C c;
-  final D d;
-  final E e;
-
-  DependOnABCDE(this.a, this.b, this.c, this.d, this.e)
-      : assert(a != null && b != null && c != null && d != null && e != null);
-}
-
-class DependOnABCDEF {
-  final A a;
-  final B b;
-  final C c;
-  final D d;
-  final E e;
-  final F f;
-
-  DependOnABCDEF(this.a, this.b, this.c, this.d, this.e, this.f)
-      : assert(a != null &&
-            b != null &&
-            c != null &&
-            d != null &&
-            e != null &&
-            f != null);
-}
-
-class DependOnABCDEFG {
-  final A a;
-  final B b;
-  final C c;
-  final D d;
-  final E e;
-  final F f;
-  final G g;
-
-  DependOnABCDEFG(this.a, this.b, this.c, this.d, this.e, this.f, this.g)
-      : assert(a != null &&
-            b != null &&
-            c != null &&
-            d != null &&
-            e != null &&
-            f != null &&
-            g != null);
-}
-
-class DependOnABCDEFGH {
-  final A a;
-  final B b;
-  final C c;
-  final D d;
-  final E e;
-  final F f;
-  final G g;
-  final H h;
-
-  DependOnABCDEFGH(
-      this.a, this.b, this.c, this.d, this.e, this.f, this.g, this.h)
-      : assert(a != null &&
-            b != null &&
-            c != null &&
-            d != null &&
-            e != null &&
-            f != null &&
-            g != null &&
-            h != null);
-}

test/resolvers/factory_resolver_test.dart

@@ -1,27 +0,0 @@
-import 'package:dart_di/resolvers/factory_resolver.dart';
-import 'package:test/test.dart';
-import 'package:mockito/mockito.dart' as mockito;
-
-void main() {
-  test('Factory resolver resolves with factory', () {
-    const expected = 3;
-    final factoryResolver = new FactoryResolver(() => expected);
-
-    expect(factoryResolver.resolve(), expected);
-  });
-
-  test('Factory creates value only after resolve() call', () {
-    final spy = new SpyMock();
-    final factoryResolver = new FactoryResolver(() => spy.onFactory());
-
-    mockito.verifyNever(spy.onFactory());
-    factoryResolver.resolve();
-    mockito.verify(spy.onFactory());
-  });
-}
-
-abstract class Spy {
-  void onFactory();
-}
-
-class SpyMock extends mockito.Mock implements Spy {}

test/resolvers/singelton_resolver_test.dart

@@ -1,36 +0,0 @@
-import 'package:dart_di/resolvers/factory_resolver.dart';
-import 'package:dart_di/resolvers/singelton_resolver.dart';
-import 'package:test/test.dart';
-import 'package:mockito/mockito.dart' as mockito;
-
-void main() {
-  test(
-      'Not singleton resolver resolves different values after multiple resolve() calls',
-      () {
-    const callCount = 3;
-    final spy = new SpyMock();
-    final factoryResolver = new FactoryResolver(() => spy..onFactory());
-
-    for (var i = 0; i < callCount; i++) factoryResolver.resolve();
-
-    mockito.verify(spy.onFactory()).called(callCount);
-  });
-
-  test('Singleton resolver resolves same value after multiple resolve() calls',
-      () {
-    const callCount = 3;
-    final spy = new SpyMock();
-    final singletonResolver =
-        new SingletonResolver(new FactoryResolver(() => spy..onFactory()));
-
-    for (var i = 0; i < callCount; i++) singletonResolver.resolve();
-
-    mockito.verify(spy.onFactory()).called(1);
-  });
-}
-
-abstract class Spy {
-  void onFactory();
-}
-
-class SpyMock extends mockito.Mock implements Spy {}

test/resolvers/value_resolver_test.dart

@@ -1,11 +0,0 @@
-import 'package:dart_di/resolvers/value_resolver.dart';
-import 'package:test/test.dart';
-
-void main() {
-  test('Value resolver resolves with selected value', () {
-    var a = 3;
-    final valResolver = new ValueResolver(a);
-
-    expect(valResolver.resolve(), a);
-  });
-}

test/scope_test.dart

@@ -0,0 +1,91 @@
+import 'package:dart_di/module.dart';
+import 'package:dart_di/scope.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group("Without parent scope.", () {
+    test('Parent scope is null.', () {
+      final scope = new Scope(null);
+      expect(scope.parentScope, null);
+    });
+
+    test('Open sub scope.', () {
+      final scope = new Scope(null);
+      final subScope = scope.openSubScope("subScope");
+      expect(scope.openSubScope("subScope"), subScope);
+    });
+
+    test("Container throws state error if the value can't be resolved", () {
+      final scope = new Scope(null);
+      expect(() => scope.resolve<String>(), throwsA(isA<StateError>()));
+    });
+
+    test('Container resolves value after adding a dependency', () {
+      final expectedValue = "test string";
+      final scope = new Scope(null)
+          .installModules([TestModule<String>(value: expectedValue)]);
+      expect(scope.resolve<String>(), expectedValue);
+    });
+  });
+
+  group('With parent scope.', () {
+    /*  
+    test(
+        "Container bind() throws state error (if it's parent already has a resolver)",
+        () {
+      final parentScope = new Scope(null)
+          .installModules([TestModule<String>(value: "string one")]);
+      final scope = new Scope(parentScope);
+
+      expect(
+          () => scope.installModules([TestModule<String>(value: "string two")]),
+          throwsA(isA<StateError>()));
+    });
+*/
+    test("Container resolve() returns a value from parent container.", () {
+      final expectedValue = 5;
+      final parentScope = Scope(null);
+      final scope = Scope(parentScope);
+
+      parentScope.installModules([TestModule<int>(value: expectedValue)]);
+
+      expect(scope.resolve<int>(), expectedValue);
+    });
+
+    test("Container resolve() returns a  several value from parent container.",
+        () {
+      final expectedIntValue = 5;
+      final expectedStringValue = "Hello world";
+      final parentScope = Scope(null).installModules([
+        TestModule<int>(value: expectedIntValue),
+        TestModule<String>(value: expectedStringValue)
+      ]);
+      final scope = Scope(parentScope);
+
+      expect(scope.resolve<int>(), expectedIntValue);
+      expect(scope.resolve<String>(), expectedStringValue);
+    });
+
+    test("Container resolve() throws a state error if parent hasn't value too.",
+        () {
+      final parentScope = Scope(null);
+      final scope = Scope(parentScope);
+      expect(() => scope.resolve<int>(), throwsA(isA<StateError>()));
+    });
+  });
+}
+
+class TestModule<T> extends Module {
+  final T value;
+  final String? name;
+
+  TestModule({required this.value, this.name});
+  @override
+  void builder(Scope currentScope) {
+    if (name == null) {
+      bind<T>().toInstance(value);
+    } else {
+      bind<T>().withName(name!).toInstance(value);
+    }
+  }
+}