feat(di): injectable now accept InjectableOptions

packages/di/src/__tests__/injectable.spec.ts

@@ -304,4 +304,26 @@ describe('injectable specs', () => {
     const service = newInjector.getInstance(Service)
     expect(service.dep).toBe(1)
   })
+
+  it('should be able to inject provider via InjectableConfigs', () => {
+    @Injectable()
+    class Dep {}
+
+    const token = new InjectionToken<Dep>('whatever')
+
+    @Injectable({
+      providers: [
+        {
+          useClass: Dep,
+          provide: token,
+        },
+      ],
+    })
+    class Service {
+      constructor(@Inject(token) public dep: Dep) {}
+    }
+
+    expect(rootInjector.getInstance(Service).dep instanceof Dep).toBeTruthy()
+    expect(rootInjector.getInstance(Service).dep).toBe(rootInjector.getInstance(Dep))
+  })
 })

packages/di/src/injectable.ts

@@ -1,11 +1,19 @@
 import { rootInjector } from './root-injector'
+import { Provider } from './type'
 
-export function Injectable() {
+export interface InjectableOptions {
+  providers: Provider[]
+}
+
+export function Injectable(options?: InjectableOptions) {
   return function (target: any) {
     rootInjector.addProvider({
       useClass: target,
       provide: target,
     })
+    for (const provider of options?.providers ?? []) {
+      rootInjector.addProvider(provider)
+    }
     return target
   }
 }