Add test

Author: Julien Heller

test/decorators/Service.spec.ts

@@ -1,6 +1,7 @@
 import "reflect-metadata";
 import {Container} from "../../src/Container";
 import {Service} from "../../src/decorators/Service";
+import {AsyncInitializedService} from "../../src/types/AsyncInitializedService";
 
 describe("Service Decorator", function() {
 
@@ -99,7 +100,7 @@ describe("Service Decorator", function() {
 
     });
 
-    it("should support factory function with arguments", function() {
+    it("should support factory class with arguments on create method", function() {
 
         @Service()
         class Engine {
@@ -183,4 +184,28 @@ describe("Service Decorator", function() {
         scopedContainer.get(Engine).name.should.be.equal("sporty");
     });
 
+    it("should support services with asynchronous initialization", async function() {
+
+        @Service({ asyncInitialization: true })
+        class Engine extends AsyncInitializedService {
+            ignition: string = "off";
+
+            protected initialize() {
+                return new Promise((resolve) => {
+                    setTimeout(() => {
+                        this.ignition = "running";
+                        resolve();
+                    }, 0);
+                });
+            }
+        }
+
+        @Service()
+        class Car {
+            constructor(public engine: Engine) {
+            }
+        }
+
+        (await Container.getAsync(Car)).engine.ignition.should.be.equal("running");
+    });
 });