Jest - 断言异步函数抛出测试失败

Question

得到以下失败的测试用例，我不知道为什么：

foo.js

async function throws() {
  throw 'error';
}

async function foo() {
  try {
    await throws();
  } catch(e) {
    console.error(e);
    throw e;
  }
}

测试.js

const foo = require('./foo');

describe('foo', () => {
  it('should log and rethrow', async () => {
    await expect(foo()).rejects.toThrow();
  });
});

我希望 foo 抛出但由于某种原因它只是解决并且测试失败：

FAILED foo › should log and rethrow - Received function did not throw

活生生的例子

可能缺少异步等待抛出行为的一些基本细节。

Answer 1

我认为你需要的是检查被拒绝的错误

const foo = require('./foo');
describe('foo', () => {
  it('should log and rethrow', async () => {
    await expect(foo()).rejects.toEqual('error');
  });
});