message: Add popup disable scroll test
diff: import Enzyme, { mount, shallow } from "enzyme";
  import Adapter from "enzyme-adapter-react-16";
  -import faker from "faker";
  import React from "react";
  import sinon from "sinon";
  import Popup from "../index";
  @@ -64,4 +63,12 @@ describe("popup specs", () => {
  wrapper.find(".popup-main").simulate("click", event);
  expect(onClose.calledOnce).toEqual(false);
  });
  +
  + it("should add disable-scroll class when popup is shown", () => {
  + const onClose = sandbox.spy();
  + const wrapper = mount(
  + <Popup onClose={onClose} show={true}/>,
  + );
  + expect(document.body.className).toBe("disable-scroll");
  + });
  });
  