test(server): make testing more isolated (#4290)

apps/server/src/modules/auth/index.ts

@@ -1,6 +1,6 @@
 import { Global, Module } from '@nestjs/common';
 
-import { SessionService } from '../../session';
+import { SessionModule } from '../../session';
 import { MAILER, MailService } from './mailer';
 import { NextAuthController } from './next-auth.controller';
 import { NextAuthOptionsProvider } from './next-auth-options';
@@ -9,9 +9,9 @@ import { AuthService } from './service';
 
 @Global()
 @Module({
+  imports: [SessionModule],
   providers: [
     AuthService,
-    SessionService,
     AuthResolver,
     NextAuthOptionsProvider,
     MAILER,

apps/server/src/session.ts

@@ -1,19 +1,23 @@
 import KeyvRedis from '@keyv/redis';
-import { Global, Injectable, Module } from '@nestjs/common';
+import {
+  FactoryProvider,
+  Global,
+  Inject,
+  Injectable,
+  Module,
+} from '@nestjs/common';
 import Redis from 'ioredis';
 import Keyv from 'keyv';
 
 import { Config } from './config';
 
-@Injectable()
-export class SessionService {
-  private readonly cache: Keyv;
-  private readonly prefix = 'session:';
-  private readonly sessionTtl = 30 * 60 * 1000; // 30 min
+export const KeyvProvide = Symbol('KeyvProvide');
 
-  constructor(protected readonly config: Config) {
+export const KeyvProvider: FactoryProvider<Keyv> = {
+  provide: KeyvProvide,
+  useFactory(config: Config) {
     if (config.redis.enabled) {
-      this.cache = new Keyv({
+      return new Keyv({
         store: new KeyvRedis(
           new Redis(config.redis.port, config.redis.host, {
             username: config.redis.username,
@@ -23,9 +27,18 @@ export class SessionService {
         ),
       });
     } else {
-      this.cache = new Keyv();
+      return new Keyv();
     }
-  }
+  },
+  inject: [Config],
+};
+
+@Injectable()
+export class SessionService {
+  private readonly prefix = 'session:';
+  private readonly sessionTtl = 30 * 60 * 1000; // 30 min
+
+  constructor(@Inject(KeyvProvide) private readonly cache: Keyv) {}
 
   /**
    * get session
@@ -54,7 +67,7 @@ export class SessionService {
 
 @Global()
 @Module({
-  providers: [SessionService],
-  exports: [SessionService],
+  providers: [KeyvProvider, SessionService],
+  exports: [KeyvProvider, SessionService],
 })
 export class SessionModule {}

apps/server/src/tests/session.spec.ts

@@ -1,40 +1,44 @@
 /// <reference types="../global.d.ts" />
 
 import { Test, TestingModule } from '@nestjs/testing';
-import { PrismaClient } from '@prisma/client';
-import test from 'ava';
+import ava, { TestFn } from 'ava';
 
 import { ConfigModule } from '../config';
 import { SessionModule, SessionService } from '../session';
 
-let session: SessionService;
-let module: TestingModule;
+const test = ava as TestFn<{
+  session: SessionService;
+  app: TestingModule;
+}>;
 
-// cleanup database before each test
-test.beforeEach(async () => {
-  const client = new PrismaClient();
-  await client.$connect();
-  await client.user.deleteMany({});
-  await client.$disconnect();
-});
-
-test.beforeEach(async () => {
-  module = await Test.createTestingModule({
-    imports: [ConfigModule.forRoot(), SessionModule],
+test.beforeEach(async t => {
+  const module = await Test.createTestingModule({
+    imports: [
+      ConfigModule.forRoot({
+        redis: {
+          enabled: false,
+        },
+      }),
+      SessionModule,
+    ],
   }).compile();
-  session = module.get(SessionService);
+  const session = module.get(SessionService);
+  t.context.app = module;
+  t.context.session = session;
 });
 
-test.afterEach(async () => {
-  await module.close();
+test.afterEach(async t => {
+  await t.context.app.close();
 });
 
 test('should be able to set session', async t => {
+  const { session } = t.context;
   await session.set('test', 'value');
   t.is(await session.get('test'), 'value');
 });
 
 test('should be expired by ttl', async t => {
+  const { session } = t.context;
   await session.set('test', 'value', 100);
   t.is(await session.get('test'), 'value');
   await new Promise(resolve => setTimeout(resolve, 500));