测试异步函数不起作用

如何解决测试异步函数不起作用

上周我开始学习 TypeScript，拥有 4 年的 Java 编程经验。相当有变化。无论如何，我遇到了过去几个小时一直无法解决的问题。

我有一个架构：

const userSchema = new Schema({
username : { type: String,required: true },passwordHash : { type: String,passwordSalt : { type: String,email : { type: String,emailVerified : { type: Boolean,default: false },firstName : { type: String,lastName : { type: String,postUpVotes : [Schema.Types.ObjectId],postDownVotes : [Schema.Types.ObjectId],commentUpVotes : [Schema.Types.ObjectId],commentDownVotes : [Schema.Types.ObjectId],creationDate : { type: Date,default: Date.Now },};

现在在我的测试中，我想测试我的必填字段，这意味着测试我可以在我的 mongodb 中插入一个对象。

describe('Test required user fields',function(){
    const gandalfTheWizard = new Student();

    it('Test required username',function() {
        gandalfTheWizard.username = 'cooolboy';

        return gandalfTheWizard.save().then(() => Promise.reject(new Error('Expected method to reject.')),err => { return expect(err).to.be.instanceOf(Error) }
        );
    });

    it('Test required passwordHash',function() {
        gandalfTheWizard.passwordHash = 'tes1';

        return gandalfTheWizard.save().then(() => Promise.reject(new Error('Expected method to reject.')),err => { return expect(err).to.be.instanceOf(Error) }
        );
    });

    it('Test required passwordSalt',function() {
        gandalfTheWizard.passwordSalt = 'tes2';

        return gandalfTheWizard.save().then(() => Promise.reject(new Error('Expected method to reject.')),err => { return expect(err).to.be.instanceOf(Error) }
        );
    });

    it('Test required email',function() {
        gandalfTheWizard.email = 'tes3';

        return gandalfTheWizard.save().then(() => Promise.reject(new Error('Expected method to reject.')),err => { return expect(err).to.be.instanceOf(Error) }
        );
    });

    it('Test required firstName',function() {
        gandalfTheWizard.firstName = 'tes4';

        return gandalfTheWizard.save().then(() => Promise.reject(new Error('Expected method to reject.')),err => { return expect(err).to.be.instanceOf(Error) }
        );
    });

    it('Test required lastName - inserts correct object',function() {
        gandalfTheWizard.lastName = 'tes5';

       
        // i spent multiple hours trying to figure out why this exact test always fails on first time
        // i can not figure it out and i am kinda done trying to figure this out
        // insertOne() buffering timed out after 10000ms - is the underlying error
         this.timeout(50000);

        return gandalfTheWizard.save();
    });
});

我还有其他一些测试，其中我只是保存了一个对象，它通过了：

it('Save Student in database',function () {
    Student.findOne({ firstName: 'Harry' }).then(result => {
        if (result != null) {
            expect(result).to.be.null;
        }
    });

    timeWizardHarry.save();

    Student.findOne().then(result => {
        if (result != null) {
            expect(result._id).to.exist;
            expect(result.username).to.equal(timeWizardHarry.username);
            expect(result.email).to.equal(timeWizardHarry.email);
        }
    });
});

所以我有点想不通了，希望有人能帮助我解决整个问题。 抱歉，如果您需要更多信息。

解决方法

我遇到的问题是我实际上并没有连接到我的数据库。 我的测试完全错误，我的数据库设置也是如此。 我忘记使用 AWAIT 而我有

import * as mongoose from 'mongoose' 

这不起作用。

import mongoose from 'mongoose' 

让它发挥作用。