atlas/packages/components/__tests__/Button.test.js

import React from "react";
import { mount } from "enzyme";
import Button from "./../src/components/Button";

describe("Button component", () => {
	it("Should render default button correctly", () => {
		expect(mount(<Button>Click me!</Button>)).toMatchSnapshot();
	});

	it("Should render custom button correctly", () => {
		expect(mount(<Button size="large">Hello Atlas</Button>)).toMatchSnapshot();
	});
});