测试执行后函数运行前的node.js mocha

Question

我已经移动了很多，并尝试使用done()、async 和链接then()，移动describe()，我最近的尝试是按照Async function in mocha before() is alway finished before it() spec? 的建议在之前返回一个承诺。

表示表已创建的console.log('finished!') 打印在表示测试开始的console.log('starting tests') 之后。

我应该提到，以某种方式创建了用户表，并且所有用户测试都像魅力一样工作。

我所有的测试都失败了，因为它们试图对不存在的表执行操作。我不确定了。如何确保before在实际测试之前运行？

describe('', async () => {
    before('setting up database', async () => {
        return new Promise(async resolve => {
            await db.users.createTable()
            await db.stores.createTable()
            await db.booths.createTable()
            await db.reservations.createTable()
            await db.clothing.createTable()
            console.log('finished!')
            resolve()
        })
    })
    describe('running datalayer test suite', async () => {
        try {
            console.log('starting tests')
            await userTest()
            await storeTest()
            await boothTest()
            await reservationTest()
            await clothingTest()
        } catch (e) {
            console.warn(e)
        }
    })
    after('destroying db', async () => {
        await db.clothing.dropTable()
        await db.reservations.dropTable()
        await db.booths.dropTable()
        await db.stores.dropTable()
        await db.users.dropTable()

    })
})

starting tests
(node:16339) UnhandledPromiseRejectionWarning: Error: something went wrong with persisting the store: error: relation "stores" does not exist
    at module.exports (/home/jonas/Projects/sellsome-backend/exceptions/query-exception.js:2:19)
    at Object.insert (/home/jonas/Projects/sellsome-backend/logiclayer/stores.js:23:19)
    at process._tickCallback (internal/process/next_tick.js:68:7)
(node:16339) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 2)
(node:16339) [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.
..... tons more
finished!

---

编辑：摩卡版本 8.1.1

Answer 1

通常我不会回答我自己的问题 - 但是删除内部描述块完美地修复了它。我还没有弄清楚究竟是为什么。

describe('', async () => {
    before('setting up database', async () => {
        return new Promise(async resolve => {
            await db.users.createTable()
            await db.stores.createTable()
            await db.booths.createTable()
            await db.reservations.createTable()
            await db.clothing.createTable()
            console.log('finished!')
            resolve()
        })
    })
    try {
        console.log('starting tests')
        await userTest()
        await storeTest()
        await boothTest()
        await reservationTest()
        await clothingTest()
    } catch (e) {
       console.warn(e)
    }
    after('destroying db', async () => {
        await db.clothing.dropTable()
        await db.reservations.dropTable()
        await db.booths.dropTable()
        await db.stores.dropTable()
        await db.users.dropTable()

    })
})

Answer 2

请检查您的摩卡咖啡版本，因为我知道以前的版本类似于

before(function (done) {
   db.collection('user').remove({}, function (res) { done(); }); // It is now guaranteed to finish before 'it' starts.
})

done() 是这里的关键

在新版本中是这样的

let message = '';
before(() => {
  return new Promise((resolve) => {
    setTimeout(() => {
      message = "hello";
      resolve();
    }, 10);
  });
});
it('message should be hello', () => {
  assert(message === 'hello');
});

Link

Answer 3

我之前也遇到过类似的问题，但不确定是不是一样。

请尝试这种风格。注意 async function() 而不是箭头函数。

before('setting up database', async function() {
       await db.users.createTable()
       await db.stores.createTable()
       await db.booths.createTable()
       await db.reservations.createTable()
       await db.clothing.createTable()
       console.log('finished!')
})