Function rejectsWith

test/36.database.backup.js:16–20

(type, p)

	const fulfillsWith = (value, p) => p.then(v => void expect(v).to.deep.equal(value));
	const rejectsWith = (type, p) => {
		const shouldReject = () => { throw new Error('Promise should have been rejected') };
		const reasonIs = (reason) => { if (!(reason instanceof type)) throw reason; }
		return p.then(shouldReject, reasonIs);
	};

	it('should be rejected when destination is not a string', async function () {
		await rejectsWith(TypeError, this.db.backup());