hasNamed

angel_container/CHANGELOG.md

@@ -1,3 +1,6 @@
+# 1.0.1
+* Added `hasNamed`.
+
 # 1.0.0
 * Removed `@GenerateReflector`.
 

angel_container/lib/src/container.dart

@@ -21,6 +21,7 @@ class Container {
     return new Container._child(this);
   }
 
+  /// Determines if the container has an injection of the given type.
   bool has<T>([Type t]) {
     var search = this;
     t ??= T == dynamic ? t : T;
@@ -38,6 +39,21 @@ class Container {
     return false;
   }
 
+  /// Determines if the container has a named singleton with the given [name].
+  bool hasNamed(String name) {
+    var search = this;
+
+    while (search != null) {
+      if (search._namedSingletons.containsKey(name)) {
+        return true;
+      } else {
+        search = search._parent;
+      }
+    }
+
+    return false;
+  }
+
   /// Instantiates an instance of [T].
   ///
   /// In contexts where a static generic type cannot be used, use

angel_container/pubspec.yaml

@@ -1,5 +1,5 @@
 name: angel_container
-version: 1.0.0
+version: 1.0.1
 author: Tobe O <thosakwe@gmail.com>
 description: "A better IoC container and dependency injector for Angel, ultimately allowing Angel to be used without dart:mirrors."
 homepage: https://github.com/angel-dart/container.git

angel_container/test/has_test.dart

@@ -7,6 +7,7 @@ void main() {
   setUp(() {
     container = new Container(const EmptyReflector())
       ..registerSingleton<Song>(new Song(title: 'I Wish'))
+      ..registerNamedSingleton('foo', 1)
       ..registerFactory<Artist>((container) {
         return new Artist(
           name: 'Stevie Wonder',
@@ -15,6 +16,13 @@ void main() {
       });
   });
 
+  test('hasNamed', () {
+    var child = container.createChild()..registerNamedSingleton('bar', 2);
+    expect(child.hasNamed('foo'), true);
+    expect(child.hasNamed('bar'), true);
+    expect(child.hasNamed('baz'), false);
+  });
+
   test('has on singleton', () {
     expect(container.has<Song>(), true);
   });