test_binder › Classes › TestBinder

TestBinder

class TestBinder

Proxy Binder implementation that records all registrations and resolutions, useful for testing module behavior.

Wraps a real Binder delegate and tracks every registerLazySingleton, registerFactory, registerSingleton, get, and tryGet call. After module initialization, use inspection methods to assert registration behavior:

await testModule(MyModule(), (module, binder) {
  expect(binder.hasSingleton<MyService>(), isTrue);
  expect(binder.hasFactory<MyRepo>(), isTrue);
  expect(binder.wasResolved<MyService>(), isFalse);
});

Implements ExportableBinder so it can be used in place of any binder in tests that exercise export-mode registrations. When the underlying delegate is itself an ExportableBinder, calls are forwarded; otherwise the export-mode methods operate on local tracking state only.

See also:

• testModule which creates and uses this binder automatically.

Constructors

TestBinder()

TestBinder(dynamic _delegate)

Create a test binder wrapping the given _delegate.

Implementation

TestBinder(this._delegate);

Properties

hashCode no setter inherited

int get hashCode

The hash code for this object.

A hash code is a single integer which represents the state of the object that affects operator == comparisons.

All objects have hash codes. The default hash code implemented by Object represents only the identity of the object, the same way as the default operator == implementation only considers objects equal if they are identical (see identityHashCode).

If operator == is overridden to use the object state instead, the hash code must also be changed to represent that state, otherwise the object cannot be used in hash based data structures like the default Set and Map implementations.

Hash codes must be the same for objects that are equal to each other according to operator ==. The hash code of an object should only change if the object changes in a way that affects equality. There are no further requirements for the hash codes. They need not be consistent between executions of the same program and there are no distribution guarantees.

Objects that are not equal are allowed to have the same hash code. It is even technically allowed that all instances have the same hash code, but if clashes happen too often, it may reduce the efficiency of hash-based data structures like HashSet or HashMap.

If a subclass overrides hashCode, it should override the operator == operator as well to maintain consistency.

Inherited from Object.

Implementation

external int get hashCode;

isExportModeEnabled no setter

bool get isExportModeEnabled

Implementation

@override
bool get isExportModeEnabled => _isExportMode;

isPublicScopeSealed no setter

bool get isPublicScopeSealed

Implementation

@override
bool get isPublicScopeSealed => _publicSealed;

registeredEagerSingletons no setter

List<Type> get registeredEagerSingletons

Unmodifiable list of types registered as eager singletons.

Implementation

List<Type> get registeredEagerSingletons =>
    List.unmodifiable(_registeredEagerSingletons);

registeredFactories no setter

List<Type> get registeredFactories

Unmodifiable list of types registered via registerFactory.

Implementation

List<Type> get registeredFactories => List.unmodifiable(_registeredFactories);

registeredInstances no setter

List<Type> get registeredInstances

Unmodifiable list of types registered via registerSingleton.

Implementation

List<Type> get registeredInstances => List.unmodifiable(_registeredInstances);

registeredSingletons no setter

List<Type> get registeredSingletons

Unmodifiable list of types registered via registerLazySingleton.

Implementation

List<Type> get registeredSingletons =>
    List.unmodifiable(_registeredSingletons);

resolvedTypes no setter

List<Type> get resolvedTypes

Unmodifiable list of types that were resolved via get or tryGet.

Implementation

List<Type> get resolvedTypes => List.unmodifiable(_resolvedTypes);

runtimeType no setter inherited

Type get runtimeType

A representation of the runtime type of the object.

Inherited from Object.

Implementation

external Type get runtimeType;

Methods

addImports()

void addImports(List<dynamic> binders)

Implementation

@override
void addImports(List<Binder> binders) {
  _delegate.addImports(binders);
}

contains()

bool contains(Type type)

Implementation

@override
bool contains(Type type) {
  return _delegate.contains(type);
}

containsPublic()

bool containsPublic(Type type)

Implementation

@override
bool containsPublic(Type type) {
  final delegate = _delegate;
  if (delegate is ExportableBinder) {
    return delegate.containsPublic(type);
  }
  return false;
}

disableExportMode()

void disableExportMode()

Implementation

@override
void disableExportMode() {
  _isExportMode = false;
  final delegate = _delegate;
  if (delegate is ExportableBinder) {
    delegate.disableExportMode();
  }
}

enableExportMode()

void enableExportMode()

Implementation

@override
void enableExportMode() {
  _isExportMode = true;
  final delegate = _delegate;
  if (delegate is ExportableBinder) {
    delegate.enableExportMode();
  }
}

get()

T get<T extends Object>()

Implementation

@override
T get<T extends Object>() {
  _resolvedTypes.add(T);
  return _delegate.get<T>();
}

hasFactory()

bool hasFactory<T>()

Returns true if T was registered via registerFactory.

Implementation

bool hasFactory<T>() => _registeredFactories.contains(T);

hasInstance()

bool hasInstance<T>()

Returns true if T was registered via registerSingleton.

Implementation

bool hasInstance<T>() => _registeredInstances.contains(T);

hasSingleton()

bool hasSingleton<T>()

Returns true if T was registered via registerLazySingleton.

Implementation

bool hasSingleton<T>() => _registeredSingletons.contains(T);

noSuchMethod() inherited

dynamic noSuchMethod(Invocation invocation)

Invoked when a nonexistent method or property is accessed.

A dynamic member invocation can attempt to call a member which doesn't exist on the receiving object. Example:

dynamic object = 1;
object.add(42); // Statically allowed, run-time error

This invalid code will invoke the noSuchMethod method of the integer 1 with an Invocation representing the .add(42) call and arguments (which then throws).

Classes can override noSuchMethod to provide custom behavior for such invalid dynamic invocations.

A class with a non-default noSuchMethod invocation can also omit implementations for members of its interface. Example:

class MockList<T> implements List<T> {
  noSuchMethod(Invocation invocation) {
    log(invocation);
    super.noSuchMethod(invocation); // Will throw.
  }
}
void main() {
  MockList().add(42);
}

This code has no compile-time warnings or errors even though the MockList class has no concrete implementation of any of the List interface methods. Calls to List methods are forwarded to noSuchMethod, so this code will log an invocation similar to Invocation.method(#add, [42]) and then throw.

If a value is returned from noSuchMethod, it becomes the result of the original invocation. If the value is not of a type that can be returned by the original invocation, a type error occurs at the invocation.

The default behavior is to throw a NoSuchMethodError.

Inherited from Object.

Implementation

@pragma("vm:entry-point")
@pragma("wasm:entry-point")
external dynamic noSuchMethod(Invocation invocation);

parent()

T parent<T extends Object>()

Implementation

@override
T parent<T extends Object>() {
  return _delegate.parent<T>();
}

registerFactory()

void registerFactory<T extends Object>(T Function() factory)

Implementation

@override
void registerFactory<T extends Object>(T Function() factory) {
  _registeredFactories.add(T);
  _delegate.registerFactory<T>(factory);
}

registerLazySingleton()

void registerLazySingleton<T extends Object>(T Function() factory)

Implementation

@override
void registerLazySingleton<T extends Object>(T Function() factory) {
  _registeredSingletons.add(T);
  _delegate.registerLazySingleton<T>(factory);
}

registerSingleton()

void registerSingleton<T extends Object>(T instance)

Implementation

@override
void registerSingleton<T extends Object>(T instance) {
  _registeredInstances.add(T);
  _delegate.registerSingleton<T>(instance);
}

resetPublicScope()

void resetPublicScope()

Implementation

@override
void resetPublicScope() {
  _publicSealed = false;
  final delegate = _delegate;
  if (delegate is ExportableBinder) {
    delegate.resetPublicScope();
  }
}

sealPublicScope()

void sealPublicScope()

Implementation

@override
void sealPublicScope() {
  _publicSealed = true;
  final delegate = _delegate;
  if (delegate is ExportableBinder) {
    delegate.sealPublicScope();
  }
}

toString() inherited

String toString()

A string representation of this object.

Some classes have a default textual representation, often paired with a static parse function (like int.parse). These classes will provide the textual representation as their string representation.

Other classes have no meaningful textual representation that a program will care about. Such classes will typically override toString to provide useful information when inspecting the object, mainly for debugging or logging.

Inherited from Object.

Implementation

external String toString();

tryGet()

T? tryGet<T extends Object>()

Implementation

@override
T? tryGet<T extends Object>() {
  _resolvedTypes.add(T);
  return _delegate.tryGet<T>();
}

tryGetPublic()

T? tryGetPublic<T extends Object>()

Implementation

@override
T? tryGetPublic<T extends Object>() {
  final delegate = _delegate;
  if (delegate is ExportableBinder) {
    return delegate.tryGetPublic<T>();
  }
  return null;
}

tryParent()

T? tryParent<T extends Object>()

Implementation

@override
T? tryParent<T extends Object>() {
  return _delegate.tryParent<T>();
}

wasResolved()

bool wasResolved<T>()

Returns true if T was resolved via get or tryGet.

Implementation

bool wasResolved<T>() => _resolvedTypes.contains(T);

Operators

operator ==() inherited

bool operator ==(Object other)

The equality operator.

The default behavior for all Objects is to return true if and only if this object and other are the same object.

Override this method to specify a different equality relation on a class. The overriding method must still be an equivalence relation. That is, it must be:

• Total: It must return a boolean for all arguments. It should never throw.

• Reflexive: For all objects o, o == o must be true.

• Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must either both be true, or both be false.

• Transitive: For all objects o1, o2, and o3, if o1 == o2 and o2 == o3 are true, then o1 == o3 must be true.

The method should also be consistent over time, so whether two objects are equal should only change if at least one of the objects was modified.

If a subclass overrides the equality operator, it should override the hashCode method as well to maintain consistency.

Inherited from Object.

Implementation

external bool operator ==(Object other);