import { getLocalStorage } from ".";
import { MemoryStorage } from "./basic";
import { BrowserLocalStorage } from "./browser";

const localStorage = (window as any).localStorage;

describe(getLocalStorage, () => {
  it("returns the best storage available", () => {
    const mockWarn = jest.spyOn(console, "warn").mockImplementation();

    let storage = getLocalStorage();
    expect(storage).toBeInstanceOf(BrowserLocalStorage);
    expect(mockWarn).not.toHaveBeenCalled();

    delete (window as any)["localStorage"];
    storage = getLocalStorage();
    expect(storage).toBeInstanceOf(MemoryStorage);
    expect(mockWarn).toHaveBeenCalledWith("No persistent storage available, using in-memory volatile storage");
  });
});

afterEach(() => {
  (window as any).localStorage = localStorage;
});