增加post服务

src/modules/post/post.module.ts

@@ -1,7 +1,9 @@
 import { Module } from '@nestjs/common';
 import { PostController } from './post.controller';
+import { PostService } from './post.service';
 
 @Module({
-  controllers: [PostController]
+  controllers: [PostController],
+  providers: [PostService]
 })
 export class PostModule {}

src/modules/post/post.service.spec.ts

@@ -0,0 +1,18 @@
+import { Test, TestingModule } from '@nestjs/testing';
+import { PostService } from './post.service';
+
+describe('PostService', () => {
+  let service: PostService;
+
+  beforeEach(async () => {
+    const module: TestingModule = await Test.createTestingModule({
+      providers: [PostService],
+    }).compile();
+
+    service = module.get<PostService>(PostService);
+  });
+
+  it('should be defined', () => {
+    expect(service).toBeDefined();
+  });
+});

src/modules/post/post.service.ts

@@ -0,0 +1,4 @@
+import { Injectable } from '@nestjs/common';
+
+@Injectable()
+export class PostService {}