你必须使用querybytestd而不是getbytestd。

这里是一个代码示例，我想测试是否组件与“汽车”id不存在。

 describe('And there is no car', () => {
  it('Should not display car mark', () => {
    const props = {
      ...defaultProps,
      base: null,
    }
    const { queryByTestId } = render(
      <IntlProvider locale="fr" messages={fr}>
        <CarContainer{...props} />
      </IntlProvider>,
    );
    expect(queryByTestId(/car/)).toBeNull();
  });
});

另一个解决方案:您也可以使用try/catch块

expect.assertions(1)
try {
    // if the element is found, the following expect will fail the test
    expect(getByTestId('your-test-id')).not.toBeVisible();
} catch (error) {
    // otherwise, the expect will throw, and the following expect will pass the test
    expect(true).toBeTruthy();
}

你必须使用querybytestd而不是getbytestd。

这里是一个代码示例，我想测试是否组件与“汽车”id不存在。

 describe('And there is no car', () => {
  it('Should not display car mark', () => {
    const props = {
      ...defaultProps,
      base: null,
    }
    const { queryByTestId } = render(
      <IntlProvider locale="fr" messages={fr}>
        <CarContainer{...props} />
      </IntlProvider>,
    );
    expect(queryByTestId(/car/)).toBeNull();
  });
});

来自DOM测试库文档-出现和消失

Asserting elements are not present The standard getBy methods throw an error when they can't find an element, so if you want to make an assertion that an element is not present in the DOM, you can use queryBy APIs instead: const submitButton = screen.queryByText('submit') expect(submitButton).toBeNull() // it doesn't exist The queryAll APIs version return an array of matching nodes. The length of the array can be useful for assertions after elements are added or removed from the DOM. const submitButtons = screen.queryAllByText('submit') expect(submitButtons).toHaveLength(2) // expect 2 elements not.toBeInTheDocument The jest-dom utility library provides the .toBeInTheDocument() matcher, which can be used to assert that an element is in the body of the document, or not. This can be more meaningful than asserting a query result is null. import '@testing-library/jest-dom/extend-expect' // use `queryBy` to avoid throwing an error with `getBy` const submitButton = screen.queryByText('submit') expect(submitButton).not.toBeInTheDocument()

当没有找到元素时，getBy*将抛出一个错误，因此您可以检查它

expect(() => getByText('your text')).toThrow('Unable to find an element');

希望这对你有所帮助

该表显示了函数错误的原因/时间

哪些函数是异步的

函数的return语句是什么