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我正在尝试使用 react-testing-library 测试属于 redux-form 一部分的代码。为文本输入字段调用 fireEvent.change 以设置新值我希望应该更新输入的值，但它从未发生过。请在下面找到测试的片段。完整代码可以在https://codesandbox.io/s/redux-form-simple-example-n3820找到 如何使用 react-testing-library 测试 redux-form 的好例子？

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const firstNameInput = getByTestId(container, "firstName");
const lastNameInput = getByTestId(container, "lastName");

const firstName = "firstName";
const lastName = "lastName";

fireEvent.change(firstNameInput, { target: { value: firstName } });
fireEvent.change(lastNameInput, { target: { value: lastName } });

const submitButton = getByTestId(container, "submitButton");
fireEvent.click(submitButton);

expect(onSubmit).toHaveBeenCalledTimes(1);
expect(onSubmit).toHaveBeenNthCalledWith(firstName, lastName);