svelte/test/runtime/samples/css/_config.js

export default {
	test ( assert, component, target, window ) {
		const [ control, test ] = target.querySelectorAll( 'p' );

		assert.equal( window.getComputedStyle( control ).color, '' );
		assert.equal( window.getComputedStyle( test ).color, 'rgb(255, 0, 0)' );
	}
};