Jest模拟点击嵌套函数

Question

当我在嵌套函数上编写测试时，我很困惑。这是代码示例。

 export const selectedItemFunc = (selectedLabel, selectedItem, item, mapSelectedItems) => {
      selectedItem.push(item);
      mapSelectedItem(selectedLabel, selectedItem, mapSelectedItems);
    };

  export const renderItemsList = (selectedLabel, filteredItems, selectedItem, mapSelectedItems) => {
          if (filteredItems && filteredItems.length) {
            return filteredItems.map((item) => {
              const checkedStatus = selectedItem && selectedItem.length ? selectedItem.filter((status) => status.value === item.value).length : false;
              return (
                <div
                  className="neighborhoodItemsContainer"
                  key={Math.random()}
                  onClick={() => checkedStatus ? removeSelectedItems(selectedLabel, selectedItem, item, mapSelectedItems) : selectedItemFunc(selectedLabel, selectedItem, item, mapSelectedItems)}
                >
                  <Col md="12">
                    <Row>
                      {renderCheckedIcon(checkedStatus, item)}
                    </Row>
                  </Col>
                </div>);
            });
          }
          return null;
        };

顺便说一句，这是我的组成部分：

 <Row>
              <Collapse
                isOpen={props.visibleItem}
                className="neighborhoodCollapse"
              >
                <Card className="neighborhoodExpandCard">
                  <CardBody className="neighborhoodCardBody">
                    {renderItemsList(props.label, props.itemList, props.selectedItem, props.mapSelectedItems)}
                  </CardBody>
                </Card>
              </Collapse>
            </Row>

我想为onClick方法编写测试。如果checkedStatus为false，我检查是否调用了selectedItemFunc函数。所以我正在写这样的测试：

describe('', () => {
beforeEach(() => {
   props = {
      openCollapse: jest.fn(),
      mapSelectedItems: jest.fn(),
      label: '',
      visibleItem: false,
      selectedItem: [],
      itemList: [
        { value: 'G1', label: 'G1', title: 'Regions', filterTitle: 'regions' }],
    };
    wrapper = shallow(<SelectableFiltering {...props} />);
})
 it('', () => {
      const button = wrapper.find('.neighborhoodItemsContainer');
      button.simulate('click');
      expect(selectedItemFunc).toHaveBeenCalled();
    });
});

但是我得到这样的错误：

expect(jest.fn())[.not].toHaveBeenCalled()

    jest.fn() value must be a mock function or spy.
    Received:
      function: [Function selectedItemFunc]

如果你能查看这些代码并且你告诉我我犯了错误的地方，我会非常高兴。谢谢。