Question

在 Jest 中，当我使用拒绝的 Promise 时，我无法使用自己的代码看到堆栈跟踪...

async function throwReject() {
  return Promise.reject("There is an asynchron error")
}

it("should display an asynchron error", async () => {
  await expect(throwReject()).rejects.toBe(1)
})

对于这个测试，我有一条不太有用的消息：

expect(received).rejects.toBe(expected) // Object.is equality

Expected: 1
Received: "There is an asynchron error"

  12 |
  13 | it("should display an asynchron error", async () => {
> 14 |   await expect(throwReject()).rejects.toBe(1)
     |                                       ^
  15 | })
  16 |

  at Object.toBe (../../node_modules/expect/build/index.js:241:20)
  at _callee$ (unit/promise.spec.js:14:39)
  at tryCatch (../../node_modules/regenerator-runtime/runtime.js:63:40)
  at Generator.invoke [as _invoke] (../../node_modules/regenerator-runtime/runtime.js:293:22)
  at Generator.next (../../node_modules/regenerator-runtime/runtime.js:118:21)
  at asyncGeneratorStep (../../node_modules/@babel/runtime/helpers/asyncToGenerator.js:3:24)
  at _next (../../node_modules/@babel/runtime/helpers/asyncToGenerator.js:25:9)
  at ../../node_modules/@babel/runtime/helpers/asyncToGenerator.js:32:7
  at Object.<anonymous> (../../node_modules/@babel/runtime/helpers/asyncToGenerator.js:21:12)

另一方面，对于同步错误，堆栈跟踪要好得多，包括抛出错误的行：

function throwError() {
  throw new Error("There is an error")
}

it("should display error", () => {
  expect(throwError()).toBe(1)
})

● 应该显示错误

There is an error

  1 | function throwError() {
> 2 |   throw new Error("There is an error")
    |         ^
  3 | }
  4 |
  5 | async function throwReject() {

  at throwError (unit/promise.spec.js:2:9)
  at Object.<anonymous> (unit/promise.spec.js:10:10)

我的测试写错了吗？您有一些资源可以查看吗？

如何在 Jest 中对异步错误进行堆栈跟踪？

0 个答案: