import { afterEach, beforeEach, describe, expect, it, vi } from "vite-plus/test"; import { readUsagePagePreferences, saveUsagePagePreferences } from "./usagePagePreferences"; const key = "t3code:usage-page-preferences:v1";let values: Map<string, string>;let storage: Pick<Storage, "getItem" | "setItem">; beforeEach(() => {  values = new Map();  storage = {    getItem: (key) => values.get(key) ?? null,    setItem: (key, value) => {      values.set(key, value);    },  };  vi.stubGlobal("window", { localStorage: storage });  vi.spyOn(console, "error").mockImplementation(() => {});}); afterEach(() => {  vi.restoreAllMocks();  vi.unstubAllGlobals();}); describe("Usage page preferences", () => {  it("uses defaults when no preference has been saved", () => {    expect(readUsagePagePreferences()).toEqual({ metric: "cost", windowDays: 30 });  });   it.each([1, 7, 30, 90] as const)("round-trips every metric with a %i-day range", (windowDays) => {    for (const metric of ["cost", "tokens", "limits"] as const) {      saveUsagePagePreferences({ metric, windowDays });      expect(readUsagePagePreferences()).toEqual({ metric, windowDays });    }  });   it.each([    "not-json",    '{"metric":"unknown","windowDays":7}',    '{"metric":"cost","windowDays":365}',  ])("replaces invalid preferences on the next save: %s", (value) => {    values.set(key, value);    expect(readUsagePagePreferences()).toEqual({ metric: "cost", windowDays: 30 });    saveUsagePagePreferences({ metric: "tokens", windowDays: 7 });    expect(readUsagePagePreferences()).toEqual({ metric: "tokens", windowDays: 7 });  });   it("contains write failures and can save again after storage recovers", () => {    saveUsagePagePreferences({ metric: "cost", windowDays: 30 });    const write = vi.spyOn(storage, "setItem").mockImplementation(() => {      throw new Error("QuotaExceededError");    });    expect(() => saveUsagePagePreferences({ metric: "tokens", windowDays: 7 })).not.toThrow();    expect(readUsagePagePreferences()).toEqual({ metric: "cost", windowDays: 30 });    write.mockRestore();    saveUsagePagePreferences({ metric: "limits", windowDays: 7 });    expect(readUsagePagePreferences()).toEqual({ metric: "limits", windowDays: 7 });  });   it("contains failures when the browser blocks storage access", () => {    vi.stubGlobal("window", {      get localStorage() {        throw new Error("SecurityError");      },    });    expect(readUsagePagePreferences()).toEqual({ metric: "cost", windowDays: 30 });    expect(() => saveUsagePagePreferences({ metric: "tokens", windowDays: 7 })).not.toThrow();  });});