refactor: adding parameter dependency injection
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a07bd666c2
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433da78695
3 changed files with 307 additions and 7 deletions
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@ -1039,7 +1039,9 @@ class Container {
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/// ```dart
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/// container.call('Logger@log', ['Hello world']);
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/// ```
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dynamic call(String target, [List<dynamic> parameters = const []]) {
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dynamic call(String target,
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[List<dynamic> parameters = const [],
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Map<Symbol, dynamic> namedParameters = const {}]) {
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var parts = target.split('@');
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if (parts.length != 2) {
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throw ArgumentError('Invalid Class@method syntax: $target');
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@ -1063,8 +1065,39 @@ class Container {
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throw ArgumentError('Method not found: $methodName on $className');
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}
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// Get method parameters
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var methodParams = method.parameters;
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var resolvedParams = [];
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var paramIndex = 0;
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// Resolve each parameter
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for (var param in methodParams) {
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// If a value was provided for this parameter position, use it
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if (paramIndex < parameters.length) {
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var value = parameters[paramIndex++];
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// If null was provided and we can resolve from container, do so
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if (value == null && has(param.type.reflectedType)) {
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resolvedParams.add(make(param.type.reflectedType));
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} else {
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resolvedParams.add(value);
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}
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continue;
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}
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// Otherwise try to resolve from container
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var paramType = param.type.reflectedType;
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if (has(paramType)) {
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resolvedParams.add(make(paramType));
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} else if (param.isRequired) {
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throw BindingResolutionException(
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'No value provided for required parameter ${param.name} of type $paramType in $className@$methodName');
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}
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}
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// Call the method with resolved parameters
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return method
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.invoke(Invocation.method(Symbol(methodName), parameters))
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.invoke(Invocation.method(
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Symbol(methodName), resolvedParams, namedParameters))
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.reflectee;
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}
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@ -39,20 +39,32 @@ class MockReflector extends Reflector {
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case 'log':
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return MockMethod('log', (invocation) {
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var args = invocation.positionalArguments;
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if (args.isEmpty) {
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throw ArgumentError('Method log requires a message parameter');
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}
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return MockReflectedInstance(instance.log(args[0] as String));
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});
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}, [MockParameter('message', String, true, false)]);
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case 'debug':
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return MockMethod('debug', (invocation) {
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var args = invocation.positionalArguments;
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if (args.isEmpty) {
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throw ArgumentError('Method debug requires a message parameter');
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}
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instance.debug(args[0] as String);
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return MockReflectedInstance(null);
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});
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}, [
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MockParameter('message', String, true, false),
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MockParameter('level', int, false, true)
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]);
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case 'count':
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return MockMethod('count', (invocation) {
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var args = invocation.positionalArguments;
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if (args.isEmpty) {
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throw ArgumentError('Method count requires a list parameter');
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}
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return MockReflectedInstance(
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instance.count(args[0] as List<String>));
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});
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}, [MockParameter('items', List<String>, true, false)]);
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}
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}
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return null;
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@ -62,8 +74,11 @@ class MockReflector extends Reflector {
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class MockMethod implements ReflectedFunction {
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final String methodName;
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final ReflectedInstance Function(Invocation) handler;
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final List<ReflectedParameter> _parameters;
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MockMethod(this.methodName, this.handler);
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MockMethod(this.methodName, this.handler,
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[List<ReflectedParameter>? parameters])
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: _parameters = parameters ?? [];
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@override
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List<ReflectedInstance> get annotations => [];
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@ -78,7 +93,7 @@ class MockMethod implements ReflectedFunction {
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String get name => methodName;
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@override
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List<ReflectedParameter> get parameters => [];
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List<ReflectedParameter> get parameters => _parameters;
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@override
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ReflectedType? get returnType => null;
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@ -90,6 +105,46 @@ class MockMethod implements ReflectedFunction {
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ReflectedInstance invoke(Invocation invocation) => handler(invocation);
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}
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class MockParameter implements ReflectedParameter {
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@override
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final String name;
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@override
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final bool isRequired;
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@override
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final bool isNamed;
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final Type paramType;
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MockParameter(this.name, this.paramType, this.isRequired, this.isNamed);
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@override
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List<ReflectedInstance> get annotations => [];
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@override
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ReflectedType get type => MockReflectedType(paramType);
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}
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class MockReflectedType implements ReflectedType {
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@override
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final String name;
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@override
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final Type reflectedType;
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MockReflectedType(this.reflectedType) : name = reflectedType.toString();
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@override
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List<ReflectedTypeParameter> get typeParameters => [];
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@override
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bool isAssignableTo(ReflectedType? other) => false;
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@override
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ReflectedInstance newInstance(
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String constructorName, List positionalArguments,
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[Map<String, dynamic> namedArguments = const {},
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List<Type> typeArguments = const []]) =>
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throw UnimplementedError();
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}
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class MockReflectedInstance implements ReflectedInstance {
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final dynamic value;
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@ -0,0 +1,212 @@
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import 'package:platformed_container/container.dart';
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import 'package:test/test.dart';
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class Config {
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final String environment;
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Config(this.environment);
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}
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class Logger {
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String log(String message) => message;
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void configure(Config config) {}
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String format(String message, {int? level}) => '$message (level: $level)';
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void setup(Config config, String name) {}
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}
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class MockReflector extends Reflector {
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@override
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String? getName(Symbol symbol) => null;
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@override
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ReflectedClass? reflectClass(Type clazz) => null;
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@override
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ReflectedType? reflectType(Type type) => null;
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@override
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ReflectedInstance? reflectInstance(Object? instance) => null;
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@override
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ReflectedFunction? reflectFunction(Function function) => null;
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@override
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ReflectedType reflectFutureOf(Type type) => throw UnimplementedError();
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@override
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Type? findTypeByName(String name) {
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if (name == 'Logger') return Logger;
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return null;
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}
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@override
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ReflectedFunction? findInstanceMethod(Object instance, String methodName) {
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if (instance is Logger) {
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switch (methodName) {
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case 'log':
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return MockMethod('log', (invocation) {
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var args = invocation.positionalArguments;
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return MockReflectedInstance(instance.log(args[0] as String));
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}, [MockParameter('message', String, true, false)]);
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case 'configure':
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return MockMethod('configure', (invocation) {
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var args = invocation.positionalArguments;
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instance.configure(args[0] as Config);
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return MockReflectedInstance(null);
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}, [MockParameter('config', Config, true, false)]);
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case 'format':
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return MockMethod('format', (invocation) {
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var args = invocation.positionalArguments;
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var namedArgs = invocation.namedArguments;
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return MockReflectedInstance(instance.format(args[0] as String,
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level: namedArgs[#level] as int?));
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}, [
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MockParameter('message', String, true, false),
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MockParameter('level', int, false, true)
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]);
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case 'setup':
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return MockMethod('setup', (invocation) {
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var args = invocation.positionalArguments;
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instance.setup(args[0] as Config, args[1] as String);
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return MockReflectedInstance(null);
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}, [
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MockParameter('config', Config, true, false),
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MockParameter('name', String, true, false)
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]);
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}
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}
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return null;
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}
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}
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class MockMethod implements ReflectedFunction {
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final String methodName;
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final ReflectedInstance Function(Invocation) handler;
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final List<ReflectedParameter> methodParameters;
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MockMethod(this.methodName, this.handler, this.methodParameters);
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@override
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List<ReflectedInstance> get annotations => [];
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@override
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bool get isGetter => false;
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@override
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bool get isSetter => false;
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@override
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String get name => methodName;
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@override
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List<ReflectedParameter> get parameters => methodParameters;
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@override
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ReflectedType? get returnType => null;
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@override
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List<ReflectedTypeParameter> get typeParameters => [];
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@override
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ReflectedInstance invoke(Invocation invocation) => handler(invocation);
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}
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class MockParameter implements ReflectedParameter {
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@override
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final String name;
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@override
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final bool isRequired;
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@override
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final bool isNamed;
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final Type paramType;
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MockParameter(this.name, this.paramType, this.isRequired, this.isNamed);
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@override
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List<ReflectedInstance> get annotations => [];
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@override
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ReflectedType get type => MockReflectedType(paramType);
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}
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class MockReflectedType implements ReflectedType {
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@override
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final String name;
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@override
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final Type reflectedType;
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MockReflectedType(this.reflectedType) : name = reflectedType.toString();
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@override
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List<ReflectedTypeParameter> get typeParameters => [];
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@override
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bool isAssignableTo(ReflectedType? other) => false;
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@override
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ReflectedInstance newInstance(
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String constructorName, List positionalArguments,
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[Map<String, dynamic> namedArguments = const {},
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List<Type> typeArguments = const []]) =>
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throw UnimplementedError();
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}
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class MockReflectedInstance implements ReflectedInstance {
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final dynamic value;
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MockReflectedInstance(this.value);
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@override
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ReflectedClass get clazz => throw UnimplementedError();
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@override
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ReflectedInstance getField(String name) => throw UnimplementedError();
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@override
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dynamic get reflectee => value;
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@override
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ReflectedType get type => throw UnimplementedError();
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}
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void main() {
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late Container container;
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setUp(() {
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container = Container(MockReflector());
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container.registerSingleton(Logger());
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container.registerSingleton(Config('test'));
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});
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group('Parameter Dependency Injection', () {
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test('can inject dependencies into method parameters', () {
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expect(() => container.call('Logger@configure'), returnsNormally);
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});
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test('uses provided parameters over container bindings', () {
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var prodConfig = Config('production');
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container.call('Logger@configure', [prodConfig]);
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});
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test('throws when required parameter is missing', () {
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expect(() => container.call('Logger@setup', [Config('test')]),
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throwsA(isA<BindingResolutionException>()));
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});
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test('handles mix of injected and provided parameters', () {
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// When null is provided for a parameter that can be resolved from container,
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// the container should resolve it
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container.call('Logger@setup', [null, 'test-logger']);
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});
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test('handles optional parameters', () {
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var result = container.call('Logger@format', ['test message']);
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expect(result, equals('test message (level: null)'));
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});
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test('handles optional parameters with provided values', () {
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var result =
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container.call('Logger@format', ['test message'], {#level: 1});
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expect(result, equals('test message (level: 1)'));
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});
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});
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}
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