解决React组件中可选回调属性未调用导致的测试失败问题

// ChooseLanguageModal.tsx
export interface ChooseLanguageModalProps {
    languageList: SelectOption[];
    onDownloadLanguage: (value?: string) => void;
    onDownload: () => void;
    onCancel?: () => void; // onCancel 被定义为可选属性
}

export const ChooseLanguageModal = (props: ChooseLanguageModalProps) => {
    // 注意：这里没有解构 onCancel 属性
    const { languageList } = props; 

    // ... 其他处理函数

    const handleCancel = async () => {
        // 问题所在：onCancel 属性在此处未被调用
        await hideChooseLanguageModal();
    };

    // ... JSX 渲染
    return (
        <Modal /* ... */>
            <ModalFooter>
                {/* ... */}
                <Button onClick={handleCancel}>{CANCEL_BUTTON_TEXT}</Button>
            </ModalFooter>
        </Modal>
    );
};

// ChooseLanguageModal.test.tsx
import { render, fireEvent, screen } from '@testing-library/react';
import React from 'react';
import { act } from 'react-dom/test-utils';
import { ChooseLanguageModal } from '../ChooseLanguageWindow.react';

describe('ChooseLanguageModal', () => {
    const languageList = [ /* ... */ ];
    const onDownloadLanguage = jest.fn();
    const handleDownload = jest.fn();
    const handleCancel = jest.fn(); // 模拟 onCancel 函数

    // ... 其他测试用例

    test('should call onCancel when cancel button is clicked', async () => {
        await act(async () => {
            render(
                <ChooseLanguageModal
                    languageList={languageList}
                    onDownloadLanguage={onDownloadLanguage}
                    onDownload={handleDownload}
                    onCancel={handleCancel} // 将模拟函数传递给组件的 onCancel 属性
                />
            );
        });

        const cancelButton = screen.getByText('Cancel');
        fireEvent.click(cancelButton);

        expect(handleCancel).toHaveBeenCalled(); // 期望 handleCancel 被调用
    });
});

// ChooseLanguageModal.tsx (修正后)
import React from 'react';
import { Button, Modal, ModalFooter } from 'react-bootstrap';
import ReactDOM from 'react-dom';

import Select from 'controls/Select/Select';
import { getModalRoot } from 'sd/components/layout/admin/forms/FvReplaceFormModal/helpers';
import { DOWNLOAD_BUTTON_TEXT, CANCEL_BUTTON_TEXT } from 'sd/constants/ModalWindowConstants';

import 'sd/components/layout/admin/forms/FvReplaceFormModal/style.scss';
import type { SelectOption } from 'shared/types/General';

const { Body: ModalBody, Header: ModalHeader, Title: ModalTitle } = Modal;

export interface ChooseLanguageModalProps {
    languageList: SelectOption[];
    onDownloadLanguage: (value?: string) => void;
    onDownload: () => void;
    onCancel?: () => void; // onCancel 仍然是可选属性
}

const HEADER_TITLE = 'Choose language page';
const CHOOSE_LANGUAGE_LABEL = 'Choose language';

export const ChooseLanguageModal = (props: ChooseLanguageModalProps) => {
    // 关键修改：解构出 onCancel 属性
    const { languageList, onCancel } = props; 

    const onChangeLanguage = (value?: string | undefined) => {
        const { onDownloadLanguage } = props;
        onDownloadLanguage(value);
    };

    const handleCancel = async () => {
        // 关键修改：调用 onCancel 属性，并进行空值检查
        onCancel && onCancel(); 
        await hideChooseLanguageModal();
    };

    const handleDownload = async () => {
        const { onDownload } = props;
        onDownload();
        await hideChooseLanguageModal();
    };

    return (
        <Modal
            show
            backdrop="static"
            animation={false}
            container={getModalRoot()}
            onHide={() => hideChooseLanguageModal()}
        >
            <ModalHeader closeButton>
                <ModalTitle>{HEADER_TITLE}</ModalTitle>
            </ModalHeader>
            <ModalBody>
                <div>
                    <p>This project has one or more languages set up in the Translation Manager.</p>
                    <p>
                        To download the translation in the BRD export, select one language from the drop-down below.
                        English will always be shown as the base language.
                    </p>
                    <p>
                        If a language is selected, additional columns will be added to display the appropriate
                        translation for labels, rules and text messages.
                    </p>
                    <p>You may click Download without selecting a language to export the default language.</p>
                </div>
                <div>{CHOOSE_LANGUAGE_LABEL}</div>
                <div>
                    <Select
                        clearable={false}
                        canEnterFreeText={false}
                        searchable={false}
                        options={languageList}
                        onChange={onChangeLanguage}
                    />
                </div>
            </ModalBody>
            <ModalFooter>
                <Button bsStyle="primary" onClick={handleDownload}>
                    {DOWNLOAD_BUTTON_TEXT}
                </Button>
                <Button onClick={handleCancel}>{CANCEL_BUTTON_TEXT}</Button>
            </ModalFooter>
        </Modal>
    );
};

export async function showChooseLanguageModal(props: ChooseLanguageModalProps): Promise<void> {
    await ReactDOM.render(<ChooseLanguageModal {...props} />, getModalRoot());
}

export async function hideChooseLanguageModal(): Promise<void> {
    const modalRoot = getModalRoot();
    modalRoot && ReactDOM.unmountComponentAtNode(modalRoot);
}