How to set correct namespace in jest for a module attached to html in browser for testing a function's call to another function in that module?

The question is formulated this way as I'm able to step into tested code in IDE and the actual code runs as expected, but the test fails.

There's a javascript file attached to testing HTML with <script src="../example.js"></script> and its content looks like:

function myFunc(myId) {
  console.log(myId);
}

function someOtherFunc(arg) {
  if (arg == 0)
    myFunc("#id_0");
  else
    myFunc("#id_1");
}

/*
* * * * * * * * * * * * * * * * * * * * * * * * * * *
* SECTION: exports needed by jest testing framework
* * * * * * * * * * * * * * * * * * * * * * * * * * *
*/
if (typeof exports !== 'undefined') {
  module.exports = {
    myFunc,
    someOtherFunc,
  };
}

And the following is a simplified content of testing module example.test.js with one of (many) unsuccessful ways to test that call:

const fs = require('fs');
const path = require('path');
const html = fs.readFileSync(path.resolve(__dirname, './example.html'), 'utf8');
const jquery = require('../../static/js/jquery-2.2.4.min.js');

window.$ = jquery;
window.jQuery = jquery;

const mockSend = jest.fn();
global.WebSocket = jest.fn();
global.WebSocket.mockImplementation(() => {
  return {
    send: mockSend,
  };
});

const example = require('../example.js');

jest
  .dontMock('fs');

beforeEach(() => {
  document.documentElement.innerHTML = html.toString();
});

afterEach(() => {
  jest.resetModules();
});

describe('someOtherFunc function', function () {
  it('calls myFunc', function () {
    const spyFunc = jest.spyOn(example, "myFunc");
    const result = example.someOtherFunc(0);
    expect(spyFunc).toHaveBeenCalledWith("#id_0")
  });
});

I pasted this mockSend part here as I've managed to test that successfully with expect(mockSend).toHaveBeenCalledWith("...");. That send method is also inside another function and I test a calling function in jest module.

However, I can't find a way to make this 'calls myFunc' test to pass.