From 2ce4607366a05633598fb2a9a75881ba92ad658c Mon Sep 17 00:00:00 2001
From: Patrick Stewart <pstewart@nogac.org>
Date: Fri, 27 Dec 2024 09:19:24 -0700
Subject: [PATCH] refactor: add flush() for container reset 167 pass 4 fail

---
 .../container/lib/src/container.dart          |  27 +++
 .../container/container/test/flush_test.dart  | 222 ++++++++++++++++++
 2 files changed, 249 insertions(+)
 create mode 100644 incubation/container/container/test/flush_test.dart

diff --git a/incubation/container/container/lib/src/container.dart b/incubation/container/container/lib/src/container.dart
index 1e513b1..988e461 100644
--- a/incubation/container/container/lib/src/container.dart
+++ b/incubation/container/container/lib/src/container.dart
@@ -1248,6 +1248,33 @@ class Container {
     bindIf<T>(concrete, singleton: true);
   }
 
+  /// Reset the container's state
+  ///
+  /// This method clears all bindings, aliases, extenders, and callbacks,
+  /// effectively resetting the container to its initial state.
+  ///
+  /// ```dart
+  /// container.flush();
+  /// ```
+  void flush() {
+    _singletons.clear();
+    _factories.clear();
+    _namedSingletons.clear();
+    _aliases.clear();
+    _extenders.clear();
+    _reboundCallbacks.clear();
+    _refreshing.clear();
+    _parameterStack.clear();
+    _contextual.clear();
+    _methodBindings.clear();
+    _tags.clear();
+    _scopedInstances.clear();
+    _beforeResolvingCallbacks.clear();
+    _resolvingCallbacks.clear();
+    _afterResolvingCallbacks.clear();
+    _buildStack.clear();
+  }
+
   /// Make an instance with parameters
   ///
   /// This is an alias for making an instance while providing parameters.
diff --git a/incubation/container/container/test/flush_test.dart b/incubation/container/container/test/flush_test.dart
new file mode 100644
index 0000000..326b65a
--- /dev/null
+++ b/incubation/container/container/test/flush_test.dart
@@ -0,0 +1,222 @@
+import 'package:platformed_container/container.dart';
+import 'package:test/test.dart';
+
+abstract class Logger {
+  void log(String message);
+}
+
+class ConsoleLogger implements Logger {
+  @override
+  void log(String message) => print('Console: $message');
+}
+
+void main() {
+  late Container container;
+
+  setUp(() {
+    container = Container(MockReflector());
+  });
+
+  group('Flush Tests', () {
+    test('flush clears all bindings', () {
+      container.factory<Logger>(() => ConsoleLogger());
+      container.registerSingleton<String>('test');
+      container.registerNamedSingleton('logger', ConsoleLogger());
+      container.alias<Logger>(ConsoleLogger);
+      container.tag([Logger], 'logging');
+
+      container.flush();
+
+      expect(container.has<Logger>(), isFalse);
+      expect(container.has<String>(), isFalse);
+      expect(container.hasNamed('logger'), isFalse);
+      expect(container.isAlias(Logger), isFalse);
+      expect(container.tagged('logging'), isEmpty);
+    });
+
+    test('flush clears callbacks', () {
+      var beforeResolvingCalled = false;
+      var resolvingCalled = false;
+      var afterResolvingCalled = false;
+      var reboundCalled = false;
+
+      container.beforeResolving<Logger>((type, args, container) {
+        beforeResolvingCalled = true;
+      });
+
+      container.resolving<Logger>((instance, container) {
+        resolvingCalled = true;
+      });
+
+      container.afterResolving<Logger>((instance, container) {
+        afterResolvingCalled = true;
+      });
+
+      container.rebinding<Logger>((instance, container) {
+        reboundCalled = true;
+      });
+
+      container.flush();
+      container.factory<Logger>(() => ConsoleLogger());
+      container.make<Logger>();
+      container.refresh<Logger>();
+
+      expect(beforeResolvingCalled, isFalse);
+      expect(resolvingCalled, isFalse);
+      expect(afterResolvingCalled, isFalse);
+      expect(reboundCalled, isFalse);
+    });
+
+    test('flush clears contextual bindings', () {
+      container.bind(Logger).to(ConsoleLogger);
+      container.flush();
+
+      expect(() => container.make<Logger>(),
+          throwsA(isA<BindingResolutionException>()));
+    });
+
+    test('flush preserves parent bindings', () {
+      var parent = Container(MockReflector());
+      parent.registerSingleton<String>('parent');
+      var child = parent.createChild();
+      child.registerSingleton<Logger>(ConsoleLogger());
+
+      child.flush();
+
+      expect(child.has<String>(), isTrue);
+      expect(child.has<Logger>(), isFalse);
+    });
+  });
+}
+
+class MockReflector extends Reflector {
+  @override
+  String? getName(Symbol symbol) => null;
+
+  @override
+  ReflectedClass? reflectClass(Type clazz) {
+    if (clazz == ConsoleLogger) {
+      return MockReflectedClass(
+          'ConsoleLogger', [], [], [MockConstructor('', [])], ConsoleLogger);
+    }
+    return null;
+  }
+
+  @override
+  ReflectedType? reflectType(Type type) {
+    return reflectClass(type);
+  }
+
+  @override
+  ReflectedInstance? reflectInstance(Object? instance) => null;
+
+  @override
+  ReflectedFunction? reflectFunction(Function function) => null;
+
+  @override
+  ReflectedType reflectFutureOf(Type type) => throw UnimplementedError();
+
+  @override
+  Type? findTypeByName(String name) => null;
+
+  @override
+  ReflectedFunction? findInstanceMethod(Object instance, String methodName) =>
+      null;
+
+  @override
+  List<ReflectedInstance> getAnnotations(Type type) => [];
+
+  @override
+  List<ReflectedInstance> getParameterAnnotations(
+          Type type, String constructorName, String parameterName) =>
+      [];
+}
+
+class MockConstructor implements ReflectedFunction {
+  final String constructorName;
+  final List<ReflectedParameter> constructorParameters;
+
+  MockConstructor(this.constructorName, this.constructorParameters);
+
+  @override
+  List<ReflectedInstance> get annotations => [];
+
+  @override
+  bool get isGetter => false;
+
+  @override
+  bool get isSetter => false;
+
+  @override
+  String get name => constructorName;
+
+  @override
+  List<ReflectedParameter> get parameters => constructorParameters;
+
+  @override
+  ReflectedType? get returnType => null;
+
+  @override
+  List<ReflectedTypeParameter> get typeParameters => [];
+
+  @override
+  ReflectedInstance invoke(Invocation invocation) => throw UnimplementedError();
+}
+
+class MockReflectedClass extends ReflectedType implements ReflectedClass {
+  @override
+  final List<ReflectedInstance> annotations;
+  @override
+  final List<ReflectedFunction> constructors;
+  @override
+  final List<ReflectedDeclaration> declarations;
+
+  MockReflectedClass(
+    String name,
+    List<ReflectedTypeParameter> typeParameters,
+    this.annotations,
+    this.constructors,
+    Type reflectedType,
+  )   : declarations = [],
+        super(reflectedType.toString(), typeParameters, reflectedType);
+
+  @override
+  ReflectedInstance newInstance(
+      String constructorName, List positionalArguments,
+      [Map<String, dynamic> namedArguments = const {},
+      List<Type> typeArguments = const []]) {
+    if (reflectedType == ConsoleLogger) {
+      return MockReflectedInstance(ConsoleLogger());
+    }
+    throw UnsupportedError('Unknown type: $reflectedType');
+  }
+
+  @override
+  bool isAssignableTo(ReflectedType? other) {
+    if (reflectedType == other?.reflectedType) {
+      return true;
+    }
+    if (reflectedType == ConsoleLogger && other?.reflectedType == Logger) {
+      return true;
+    }
+    return false;
+  }
+}
+
+class MockReflectedInstance implements ReflectedInstance {
+  final dynamic value;
+
+  MockReflectedInstance(this.value);
+
+  @override
+  ReflectedClass get clazz => throw UnimplementedError();
+
+  @override
+  ReflectedInstance getField(String name) => throw UnimplementedError();
+
+  @override
+  dynamic get reflectee => value;
+
+  @override
+  ReflectedType get type => throw UnimplementedError();
+}