webpack/test/configCases/css/basic-initial-only/index.js

import * as style from "./style.css";

it("should compile and load initial style", () => {
	expect(style).toEqual({});
	const computedStyle = getComputedStyle(document.body);
	expect(computedStyle.getPropertyValue("background")).toBe(" red");
	expect(computedStyle.getPropertyValue("margin")).toBe(" 10px");
});