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');

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();
}

您可以使用react-native-testing-library "getAllByType"，然后检查该组件是否为空。优点是不必设置testd，也应该与第三方组件一起工作

 it('should contain Customer component', () => {
    const component = render(<Details/>);
    const customerComponent = component.getAllByType(Customer);
    expect(customerComponent).not.toBeNull();
  });

对我来说(如果你想使用getbytestd):

expect(() => getByTestId('time-label')).toThrow()

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

const submitButton = screen.queryByText('submit')
expect(submitButton).toBeNull() // it doesn't exist

expect(submitButton).not.toBeNull() // it exist