Javascript 我如何开玩笑地模拟单个类静态

我有一门课是这样的

import axios frome "axios";
...
class A extends Component{
  constructor(){
    A.callUnmockable();
    ...
  }
  static callUnmockable(){
    axios.defaults.withCredentials = true;
  }
}

问题是我不知道如何在不模拟整个类的情况下模拟

callUnmockable

我明白了

jest.spyOn(A,"callUnmockable").mockImplementation(() => null);

我明白了

jest.spyOn(A,"callUnmockable").mockImplementation(() => null);