jest mockgoose - jest 在测试运行完成后一秒钟没有退出

Question

我有一个猫鼬模型：

var mongoose = require("mongoose");

var transactionSchema = mongoose.Schema({
  category: { type: String, required: [true, "Category is required."] },
  amount: Number,
  comment: String,
  tags: Array,
  currency: String
});

var Transaction = mongoose.model("Transaction", transactionSchema);

module.exports = Transaction;

以及使用 mockgoose 和 jest 的简单单元测试：

var { Mockgoose } = require("mockgoose");
var mongoose = require("mongoose");
var Transaction = require("./transaction");

var mockgoose = new Mockgoose(mongoose);

describe("transaction", function() {
  afterEach(function() {
    mockgoose.helper.reset().then(() => {
      done();
    });
  });

  it("category is required", function() {
    mockgoose.prepareStorage().then(() => {
      mongoose.connect("mongodb://foobar/baz");
      mongoose.connection.on("connected", () => {
        var mockTransaction = new Transaction({
          category: "Transportation",
          amount: 25,
          comment: "Gas money, Petrol.",
          tags: ["Gas", "Car", "Transport"],
          currency: "EUR"
        });
        mockTransaction.save(function(err, savedTransaction) {
          if (err) return console.error(err);
          expect(savedTransaction).toEqual(mockTransaction);
        });
      });
    });
  });
});

现在，当我运行我的测试时，我收到了这两个警告：

(node:2199) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 1): ReferenceError: done is not defined (node:2199) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

然后单元测试通过，然后我得到这个错误信息：

Jest did not exit one second after the test run has completed.

This usually means that there are asynchronous operations that weren't stopped in your tests. Consider running Jest with --detectOpenHandles to troubleshoot this issue.

得到正确结果后如何终止测试？

Answer 1

错误的意思正是它所说的，done 未定义但已使用。如果使用承诺，则不需要它。 Jest 支持 promise，promise 应该从块中返回以便被正确处理：

afterEach(() => mockgoose.helper.reset());

如果打开句柄出现问题，如 this question，可以通过以下方式显式断开 Mongoose：

afterAll(() => mongoose.disconnect());

Answer 2

初始测试有一些问题。

第一个是@estus指出的，用jest测试时需要返回promise。第二个导致题目错误的问题是测试后没有正确关闭db连接造成的

这是最终代码，一切都按预期运行：

var { Mockgoose } = require("mockgoose");
var mongoose = require("mongoose");
var Transaction = require("./transaction");

var mockgoose = new Mockgoose(mongoose);

describe("transaction", function() {
  afterEach(function() {
    return mockgoose.helper.reset();
  });

  afterAll(function() {
    const { connections } = mongoose;
    const { childProcess } = mockgoose.mongodHelper.mongoBin;
    // kill mongod
    childProcess.kill();
    // close all connections
    for (const con of connections) {
      return con.close();
    }
    return mongoose.disconnect();
  });

  it("category is required", function() {
    expect.assertions(1);
    return mockgoose.prepareStorage().then(function() {
      mongoose.connect("mongodb://foobar/baz");
      return mongoose.connection.on("connected", function() {
        var mockTransaction = new Transaction({
          amount: 25,
          comment: "Gas money, Petrol.",
          tags: ["Gas", "Car", "Transport"],
          currency: "EUR"
        });
        return mockTransaction.save(function(err, savedTransaction) {
          console.log(err.errors.category.properties.message);
          expect(err.errors.category.properties.message).toBe(
            "Category is required."
          );
        });
      });
    });
  });
});

jest mockgoose - jest 在测试运行完成后一秒钟没有退出

jest mockgoose - jest did not exit one second after the test run has completed

javascript

mongoose

node.js

jestjs

mockgoose

jest mockgoose - jest 在测试 运行 完成后一秒钟没有退出

jest mockgoose - jest did not exit one second after the test run has completed

javascript

mongoose

node.js

jestjs

mockgoose

jest mockgoose - jest 在测试运行完成后一秒钟没有退出