let fulfil; const thePromise = new Promise(f => { fulfil = f; }); export default { props: { thePromise, show: true }, html: `

loading...

`, test({ assert, component, target }) { fulfil(42); return thePromise .then(() => { assert.htmlEqual(target.innerHTML, `

the value is 42

`); component.show = false; assert.htmlEqual(target.innerHTML, '
'); component.show = true; assert.htmlEqual(target.innerHTML, `

the value is 42

`); }); } };