我在用着MongoMemoryServer
编写集成测试。我有两个集成测试文件。当我运行 IT 测试时,我看到以下内容。我不明白为什么。我正在使用 jestjs 测试框架。
当我有两个 IT 测试文件时,我看到以下错误
MongoError: pool is draining, new operations prohibited
37 | for (const key in collections) {
38 | const collection = collections[key];
> 39 | await collection.deleteMany();
| ^
40 | }
41 | };
这是我的设置
//db-handler.js
const mongoose = require("mongoose");
const { MongoMemoryServer } = require("mongodb-memory-server");
const mongod = new MongoMemoryServer();
module.exports.connect = async () => {
const uri = await mongod.getConnectionString();
const mongooseOpts = {
useNewUrlParser: true,
autoReconnect: true,
reconnectTries: Number.MAX_VALUE,
reconnectInterval: 1000,
};
await mongoose.connect(uri, mongooseOpts);
};
module.exports.closeDatabase = async () => {
await mongoose.connection.dropDatabase();
await mongoose.connection.close();
await mongod.stop();
};
module.exports.clearDatabase = async () => {
const collections = mongoose.connection.collections;
for (const key in collections) {
const collection = collections[key];
await collection.deleteMany();
}
};
我所有的 IT 测试设置都是这样的
//example.it.test.js
const supertest = require("supertest");
const dbHandler = require("./db-handler");
const app = require("../../src/app");
const request = supertest(app);
const SomeModel = require("../Some");
beforeAll(async () => await dbHandler.connect());
afterEach(async () => await dbHandler.clearDatabase());
afterAll(async () => await dbHandler.closeDatabase());
describe("Some Test Block", () => {
it("Test One", async (done) => {
await SomeModel.create({a: "a", b "b"});
const response = await request.get("/endPointToTest");
expect(response.status).toBe(200);
done();
});
当我只有一个 IT 测试文件时,一切都工作正常。当我引入一个新的 IT 测试文件时,类似的设置如下example.it.test.js
,则新测试失败。上面的错误消息示例。
我缺少什么?当我有多个 IT 测试文件时,我的设置是否需要更改?
更新一:
我的 package.json 文件看起来像
{
"scripts": {
"start": "node index.js",
"dev": "nodemon index.js",
"test": "jest --runInBand ./tests"
},
"devDependencies": {
"jest": "^25.2.7",
"mongodb-memory-server": "^6.5.2",
"nodemon": "^2.0.2",
"supertest": "^4.0.2"
},
"jest": {
"testEnvironment": "node",
"coveragePathIgnorePatterns": [
"/node_modules/"
]
}
}