export default { test ( { assert , component , target , raf } ) { component . visible = true ; const div = target . querySelector ( 'div' ) ; assert . equal ( div . foo , 0 ) ; raf . tick ( 50 ) ; assert . equal ( div . foo , 0 ) ; raf . tick ( 150 ) ; assert . equal ( div . foo , 1 ) ; component . visible = false ; assert . equal ( div . bar , undefined ) ; raf . tick ( 200 ) ; assert . equal ( div . bar , 1 ) ; raf . tick ( 300 ) ; assert . equal ( div . bar , 0 ) ; } } ;