javascript - 单元测试中的去抖函数 'not a function'

Question

我正在尝试模拟去抖动，以便可以在单元测试中测试去抖动函数，但它告诉我该函数不是函数

错误:

TypeError: (0 , _usersDialog.debounceUpdateSearchText) is not a function

功能:

export const debounceUpdateSearchText = debounce(
  (updateText, searchString) => {
    if (searchString === '' || searchString.length === 1) {
      updateText(' ');
    }
    updateText(searchString);
  },
  500
);

测试代码:

// earlier in the file
import debounce from 'lodash/debounce';
jest.mock('lodash/debounce');
// test
it('updates the search text', () => {
      // jest.useFakeTimers();
      debounce.mockImplementation(fn => fn);
      const updateText = jest.fn();
      // call function
      debounceUpdateSearchText(updateText, 'fuego');

      // jest.advanceTimersByTime(501);
      expect(props.updateText).toHaveBeenCalledWith('fuego');
    });

Answer 1

事实证明，我的去抖模拟只需轻轻一触即可关闭，工作代码:

import debounce from 'lodash/debounce';
jest.mock('lodash/debounce', () => jest.fn(fn => fn));