test(server): make server testing utils (#5544)

packages/backend/server/tests/session.spec.ts

@@ -1,19 +1,20 @@
 /// <reference types="../src/global.d.ts" />
 
-import { Test, TestingModule } from '@nestjs/testing';
+import { TestingModule } from '@nestjs/testing';
 import ava, { type TestFn } from 'ava';
 
 import { CacheModule } from '../src/cache';
 import { ConfigModule } from '../src/config';
 import { SessionModule, SessionService } from '../src/session';
+import { createTestingModule } from './utils';
 
 const test = ava as TestFn<{
   session: SessionService;
-  app: TestingModule;
+  module: TestingModule;
 }>;
 
 test.beforeEach(async t => {
-  const module = await Test.createTestingModule({
+  const module = await createTestingModule({
     imports: [
       ConfigModule.forRoot({
         redis: {
@@ -23,14 +24,14 @@ test.beforeEach(async t => {
       CacheModule,
       SessionModule,
     ],
-  }).compile();
+  });
   const session = module.get(SessionService);
-  t.context.app = module;
+  t.context.module = module;
   t.context.session = session;
 });
 
 test.afterEach.always(async t => {
-  await t.context.app.close();
+  await t.context.module.close();
 });
 
 test('should be able to set session', async t => {