How to spy on a class constructor jest?

@gillyb is right just forgot to “mock” the Foo module

// Foo.js
export class Foo {
    public static bar() {
        doSomething();
    }

    constructor(paramA, paramB) {

    } 
}

// Foo.spec.js
import Foo from './Foo.js';
jest.mock('./Foo.js');

it('test something...', () => {
    // Assuming we did something that called our constructor
    expect(Foo).toHaveBeenCalledTimes(1);
});