add tests

apps/api/src/domain/hello/HelloModule.test.ts

@@ -0,0 +1,30 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { HelloController } from './HelloController';
+import { HelloModule } from './HelloModule';
+import { HelloService } from './HelloService';
+
+describe('HelloModule', () => {
+  let module: TestingModule;
+
+  beforeEach(async () => {
+    module = await Test.createTestingModule({
+      imports: [HelloModule],
+    }).compile();
+  });
+
+  it('should compile the module', () => {
+    expect(module).toBeDefined();
+  });
+
+  it('should provide HelloController', () => {
+    const controller = module.get<HelloController>(HelloController);
+    expect(controller).toBeDefined();
+    expect(controller).toBeInstanceOf(HelloController);
+  });
+
+  it('should provide HelloService', () => {
+    const service = module.get<HelloService>(HelloService);
+    expect(service).toBeDefined();
+    expect(service).toBeInstanceOf(HelloService);
+  });
+});