TJWaterFrontend_Refine/src/lib/logoutIntent.test.ts

import {
  clearIntentionalLogout,
  isIntentionalLogout,
  markIntentionalLogout,
} from "./logoutIntent";

describe("intentional logout marker", () => {
  afterEach(() => {
    jest.restoreAllMocks();
    clearIntentionalLogout();
  });

  it("stores a timestamp only for the current tab", () => {
    jest.spyOn(Date, "now").mockReturnValue(1_700_000_000_000);

    markIntentionalLogout();

    expect(sessionStorage.getItem("tjwater:intentional-logout")).toBe(
      "1700000000000",
    );
    expect(localStorage.getItem("tjwater:intentional-logout")).toBeNull();
    expect(isIntentionalLogout()).toBe(true);
  });

  it("accepts an intentional logout event from another open tab", () => {
    window.dispatchEvent(
      new StorageEvent("storage", {
        key: "tjwater:intentional-logout-event",
        newValue: JSON.stringify({
          type: "mark",
          markedAt: Date.now(),
        }),
      }),
    );

    expect(isIntentionalLogout()).toBe(true);
  });

  it("does not broadcast a clear event when the current tab has no marker", () => {
    clearIntentionalLogout();
    const setItem = jest.spyOn(Storage.prototype, "setItem");

    expect(isIntentionalLogout()).toBe(false);
    expect(setItem).not.toHaveBeenCalled();
  });

  it("expires a stale marker", () => {
    const now = 1_700_000_000_000;
    const nowSpy = jest.spyOn(Date, "now").mockReturnValue(now);
    markIntentionalLogout();

    nowSpy.mockReturnValue(now + 30 * 60 * 1000 + 1);

    expect(isIntentionalLogout()).toBe(false);
    expect(sessionStorage.getItem("tjwater:intentional-logout")).toBeNull();
  });
});