added di unit test

tests/unit/di.test.ts

@@ -0,0 +1,30 @@
+import "reflect-metadata";
+
+import {
+  destroyContainer,
+  getInjection,
+  initializeContainer,
+} from "@/di/container";
+import { MockTodosRepository } from "@/src/infrastructure/repositories/todos.repository.mock";
+import { MockUsersRepository } from "@/src/infrastructure/repositories/users.repository.mock";
+import { MockAuthenticationService } from "@/src/infrastructure/services/authentication.service.mock";
+import { afterEach, beforeEach, expect, it } from "vitest";
+
+beforeEach(() => {
+  initializeContainer();
+});
+
+afterEach(() => {
+  destroyContainer();
+});
+
+it("should use Mock versions of repos and services", async () => {
+  const authService = getInjection("IAuthenticationService");
+  expect(authService).toBeInstanceOf(MockAuthenticationService);
+
+  const usersRepository = getInjection("IUsersRepository");
+  expect(usersRepository).toBeInstanceOf(MockUsersRepository);
+
+  const todosRepository = getInjection("ITodosRepository");
+  expect(todosRepository).toBeInstanceOf(MockTodosRepository);
+});