let fulfil; let thePromise = new Promise(f => { fulfil = f; }); export default { props: { thePromise, show: true }, html: ` <div><p>loading...</p></div> `, test({ assert, component, target }) { fulfil(42); return thePromise .then(() => { assert.htmlEqual(target.innerHTML, ` <div><p>the value is 42</p></div> `); component.show = false; assert.htmlEqual(target.innerHTML, `<div></div>`); component.show = true; assert.htmlEqual(target.innerHTML, ` <div><p>the value is 42</p></div> `); }); } };