svelte/test/runtime/samples/await-then-catch/_config.js

let fulfil;

let thePromise = new Promise(f => {
	fulfil = f;
});

export default {
	solo: true,

	data: {
		thePromise
	},

	html: `
		<p>loading...</p>
	`,

	async test(assert, component, target) {
		fulfil(42);
		await thePromise;

		assert.htmlEqual(target.innerHTML, `
			<p>the value is 42</p>
		`);

		let reject;

		thePromise = new Promise((f, r) => {
			reject = r;
		});

		component.set({
			thePromise
		});

		assert.htmlEqual(target.innerHTML, `
			<p>loading...</p>
		`);

		reject(new Error('something broke'));
		await thePromise;

		assert.htmlEqual(target.innerHTML, `
			<p>oh no! something broke</p>
		`);
	}
};