From https://stackoverflow.com/questions/57006369/testing-asynchronous-useeffect

enzyme_mount_wait_for_useeffect.js

it('handles async useEffect', async () => {
    const component = mount(<MyComponent />);
    await act(async () => {
        await Promise.resolve(component);
        await new Promise(resolve => setImmediate(resolve));
        component.update();
    });
    console.log(component.debug());
});