import { describe, it, expect, vi, beforeEach } from 'vitest';
import { requestPersistence } from './persist';

// Tests for navigator.storage.persist() — must surface granted=false
// respectfully without spamming the user (CORE-05 + RESEARCH Pitfall 2:
// iOS Safari often returns false). Each test stubs `navigator` globally
// to one of the four scenarios.

describe('requestPersistence (CORE-05)', () => {
  beforeEach(() => vi.unstubAllGlobals());

  it('returns granted=true when navigator.storage.persist resolves true', async () => {
    vi.stubGlobal('navigator', { storage: { persist: async () => true } });
    expect(await requestPersistence()).toEqual({
      granted: true,
      apiAvailable: true,
    });
  });

  it('returns granted=false when navigator.storage.persist resolves false', async () => {
    vi.stubGlobal('navigator', { storage: { persist: async () => false } });
    expect(await requestPersistence()).toEqual({
      granted: false,
      apiAvailable: true,
    });
  });

  it('returns granted=false when persist throws', async () => {
    vi.stubGlobal('navigator', {
      storage: {
        persist: async () => {
          throw new Error('boom');
        },
      },
    });
    expect(await requestPersistence()).toEqual({
      granted: false,
      apiAvailable: true,
    });
  });

  it('returns apiAvailable=false when navigator.storage is missing', async () => {
    vi.stubGlobal('navigator', {});
    expect(await requestPersistence()).toEqual({
      granted: false,
      apiAvailable: false,
    });
  });
});