Jest.js - 节点：内部/进程/承诺：246 triggerUncaughtException(错误，真/* 来自承诺 */);

2j4z5cfb 于 2022-12-08 发布在 Jest

关注(0)|答案(3)|浏览(663)

我有下面的代码在React。

useEffect(() => {
        (async () => {
            await httpClient
                .get(`${config.resourceServerUrl}/inventory/`)
                .then((response) => {
                    setSponsor(response.data.sponsor);
                    setAddress(response.data.address);
                    setPhaseOfTrial(response.data.phaseOfTrial);
                })
                .catch((error) => {
                    alert(error);
                });
        })();
    }, []);

此代码成功运行。唯一的问题是，它在jest测试用例中失败。

describe('ListInventory', () => {
    it('should render successfully', () => {
        const { baseElement } = render(<ListInventory />);
        expect(baseElement).toBeTruthy();
    });
});

下面是错误。

node:internal/process/promises:246
          triggerUncaughtException(err, true /* fromPromise */);
          ^

[UnhandledPromiseRejection: 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(). The promise rejected with the reason "TypeError: Cannot read properties of undefined (reading 'get')".] {
  code: 'ERR_UNHANDLED_REJECTION'
}

我已经在使用catch块了。代码有什么问题吗？你能帮我解决吗？

jestjs

来源：https://stackoverflow.com/questions/71077701/react-jest-nodeinternal-process-promises246-triggeruncaughtexceptionerr-tr

3条答案

按热度按时间

pu3pd22g1#

尝试使用try-catch块处理该承诺，如下所示：

useEffect(() => {
    (async () => {
      try {
        let response = await httpClient.get(
          `${config.resourceServerUrl}/inventory/`
        );
        setSponsor(response.data.sponsor);
        setAddress(response.data.address);
        setPhaseOfTrial(response.data.phaseOfTrial);
      } catch(error) {
        alert(error);
      }
    })();
  }, []);

或

useEffect(() => {
    (async () => {
        let response = await httpClient.get(
          `${config.resourceServerUrl}/inventory/`
        );
        setSponsor(response.data.sponsor);
        setAddress(response.data.address);
        setPhaseOfTrial(response.data.phaseOfTrial);
    })().catch(e=>alert(e));
  }, []);

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sy5wg1nm2#

你应该让你的测试异步，因为你的代码中有异步调用：

describe('ListInventory', () => {
    it('should render successfully', async() => {
        const { baseElement } = render(<ListInventory />);
        expect(baseElement).toBeTruthy();
    });
});

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lxkprmvk3#

我遇到了类似的问题。
此问题可能是由于www.example.com旁边的某个对象response.data未定义。请添加条件以检查其是否存在。
这解决了我的问题

赞(0）回复(0）举报 2022-12-08