javascript - Mocking up static methods in jest

Question

I am having trouble mocking up a static method in jest. Immagine you have a class A with a static method:

export default class A {
  f() {
    return 'a.f()'
  }

  static staticF () {
    return 'A.staticF()'
  }
}

And a class B that imports A

import A from './a'

export default class B {
  g() {
    const a = new A()
    return a.f()  
  }

  gCallsStaticF() {
    return A.staticF()
  }
}

Now you want to mock up A. It is easy to mock up f():

import A from '../src/a'
import B from '../src/b'

jest.mock('../src/a', () => {
  return jest.fn().mockImplementation(() => {
    return { f: () => { return 'mockedA.f()'} }
  })
})

describe('Wallet', () => {
  it('should work', () => {
    const b = new B()
    const result = b.g()
    console.log(result) // prints 'mockedA.f()'
  })
})

However, I could not find any documentation on how to mock up A.staticF. Is this possible?

question from:https://stackoverflow.com/questions/50421732/mocking-up-static-methods-in-jest