Spy on a function which is called by another function in Jasmine

How do I spy on a function which is called by another function in Jasmine?

The expectation is true if I call this.bar() but I'm not interested on that.

Spec

import * as src from './src;

describe('app', () => {
  it('should call bar', () => {
    spyOn(src, 'bar');
    src.foo();
    expect(src.bar).toHaveBeenCalled();
  });
});

Source

function foo() {
  bar();
}

function bar() {
  console.log('bar');
}

export {
  foo,
  bar,
};