svelte/test/runtime/samples/transition-js-intro-enabled-by-option/_config.js

export default {
	skipIntroByDefault: true,
	intro: true,

	test(assert, component, target, window, raf) {
		const div = target.querySelector('div');
		assert.equal(div.foo, 0);

		raf.tick(50);
		assert.equal(div.foo, 0.5);
	},
};