svelte/test/runtime/samples/each-block-keyed-unshift/_config.js

export default {
	data: {
		titles: [{ name: 'b' }, { name: 'c' }]
	},

	html: `
		<p>b</p>
		<p>c</p>
	`,

	test (assert, component, target) {
		component.set({
			titles: [{ name: 'a' }, { name: 'b' }, { name: 'c' }]
		});

		assert.htmlEqual(target.innerHTML, `
			<p>a</p>
			<p>b</p>
			<p>c</p>
		`);

		component.destroy();
	}
};