React ugly async user scenario

reset.test.js

it('can reset a TodoList', (done)=>{
  // .. set up component and store ...

  const unsubscribe = reduxStore.subscribe(()=>{
    expect( reduxStore.getState().get('todos').size )
      .toEqual( TodoList.initState.get('todos').size );
	  
    unsubscribe();
    done();
  });

  const resetButton = mountedComponent.find('button.reset').first();
  resetButton.simulate('click');
});