Lazy singleton tests

angel_container/test/lazy_test.dart

@@ -0,0 +1,18 @@
+import 'package:angel_container/angel_container.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('returns the same instance', () {
+    var container = new Container(const EmptyReflector())
+      ..registerLazySingleton<Dummy>((_) => new Dummy('a'));
+
+    var first = container.make<Dummy>();
+    expect(container.make<Dummy>(), first);
+  });
+}
+
+class Dummy {
+  final String s;
+
+  Dummy(this.s);
+}