import { redirectToPage, SAVED_STATE_KEY } from "./router.service";

describe("redirectToPage", () => {
  // jsdom only implements same-document navigation, so target a fragment of
  // the current page to observe the browser actually moving.
  const target = () =>
    `${window.location.origin}${window.location.pathname}#students`;

  beforeEach(() => {
    window.location.hash = "";
    sessionStorage.setItem(
      SAVED_STATE_KEY,
      JSON.stringify({ membership: "student" })
    );
  });

  afterEach(() => {
    sessionStorage.clear();
  });

  it("sends the browser to the given page", () => {
    redirectToPage(target());
    expect(window.location.hash).toBe("#students");
  });

  it("clears the saved form state so returning starts afresh", () => {
    redirectToPage(target());
    expect(sessionStorage.getItem(SAVED_STATE_KEY)).toBeNull();
  });
});