
[英]TypeError: Cannot read properties of undefined (reading 'length') JEST test
[英]Jest: TypeError: Cannot read properties of undefined (reading 'getFileName')
我最近开始使用 @testing-library/user-event 库,但遇到了很多问题。 我正在尝试测试文本框验证流程,但出现错误
TypeError: Cannot read properties of undefined (reading 'getFileName')
at _default (node_modules/@jest/source-map/build/getCallsite.js:86:60)
at Function.write (node_modules/@jest/console/build/BufferedConsole.js:104:51)
at console._logError (node_modules/@jest/console/build/CustomConsole.js:107:12)
at console.error (node_modules/@jest/console/build/CustomConsole.js:147:10)
这是我的测试用例
test('allows user to add comments in the comment Box', () => {
render(
<ApproveModal
showApproveModal={showApproveModal}
updateApproveModal={updateApproveModal}
requestId={requestId}
hierarchyId={hierarchyId}
/>
);
expect(screen.getByText('Enter few details before Approval')).toBeInTheDocument();
const commentTextBox = screen.getByRole('textbox');
userEvent.type(commentTextBox, 'Approved By Admin');
expect(screen.queryByText('Please input a Valid Comment!')).not.toBeInTheDocument();
userEvent.type(commentTextBox, '');
// expect(screen.queryByText('Please input a Valid Comment!')).toBeInTheDocument();
});
以前有人遇到过这个问题吗?
尝试使用const user = userEvent.setup()
行实例化 userEvent class 并将现有的 userEvent 调用替换为 user.
这也可能对您有所帮助: https://testing-library.com/docs/user-event/setup
此外,最好一次只渲染一个组件而不是多个组件,然后尝试测试您在该特定组件上测试的内容。
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