export default { props : { value : 1 } , test ( { assert , component , target , window } ) { const buttons = target . querySelectorAll ( 'button' ) ; const click = new window . MouseEvent ( 'click' ) ; const events = [ ] ; component . $on ( 'value' , event => { events . push ( event . detail ) ; } ) ; buttons [ 0 ] . dispatchEvent ( click ) ; buttons [ 1 ] . dispatchEvent ( click ) ; component . value = 2 ; buttons [ 0 ] . dispatchEvent ( click ) ; buttons [ 1 ] . dispatchEvent ( click ) ; assert . deepEqual ( events , [ { value : 1 } , { value : 1 } , { value : 2 } , { value : 2 } ] ) ; } } ;