node.js mocha before function 在測試執行后運行

Question

我已經移動了這么多，並嘗試使用done() ， async和鏈接then() ，移動describe()並且我最近的嘗試是在之前返回一個 promise 因為Async function 在 mocha before() 中總是完成在它（）規范之前？ 建議。

指示表已創建的console.log('finished!')在指示測試開始的console.log('starting tests')之后打印。

我應該提到，以某種方式創建了用戶表，並且所有用戶測試都像魅力一樣工作。

我所有的測試都失敗了，因為它們試圖對不存在的表執行操作。 我不確定了。 如何確保在實際測試before運行之前？

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!

---

編輯：摩卡版本 8.1.1

Answer 1

我以前遇到過類似的問題，但我不確定這是否相同。

請嘗試這種風格。 注意async function()而不是箭頭函數。

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!')
})

Answer 2

請檢查您的摩卡咖啡版本，因為我知道以前的版本類似於

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

done()是這里的關鍵

在新版本中它就像

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

關聯

Answer 3

通常我不太願意回答我自己的問題 - 但刪除內部描述塊完美地修復了它。 我還沒有弄清楚為什么。

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()

    })
})