accounts-frontend/packages/app/polyfills.test.js

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import expect from 'app/test/unexpected';
describe('promise.prototype.finally', () => {
it('should be invoked after promise resolved', () =>
expect(
new Promise(resolve => Promise.resolve().finally(resolve)),
'to be fulfilled',
));
it('should be invoked after promise rejected', () =>
expect(
new Promise(resolve =>
expect(Promise.reject().finally(resolve), 'to be rejected'),
),
'to be fulfilled',
));
});