同步 sgs-frontend-mobile 源码

tests/unit/PersistentJsonCache.spec.ts

@@ -0,0 +1,42 @@
+import { beforeEach, describe, expect, it, vi } from 'vitest'
+import {
+  readPersistentJsonCache,
+  writePersistentJsonCache
+} from '@/utils/persistentJsonCache'
+
+describe('persistentJsonCache', () => {
+  const values = new Map<string, string>()
+  const localStorage = {
+    getItem: (key: string) => values.get(key) || null,
+    setItem: (key: string, value: string) => values.set(key, value),
+    removeItem: (key: string) => values.delete(key),
+    clear: () => values.clear()
+  }
+
+  beforeEach(() => {
+    vi.stubGlobal('window', { localStorage })
+    localStorage.clear()
+    vi.restoreAllMocks()
+  })
+
+  it('stores and reads a fresh JSON payload', () => {
+    expect(writePersistentJsonCache('map:manifest', { version: 'v1' }, 60_000)).toBe(true)
+    expect(readPersistentJsonCache<{ version: string }>('map:manifest')).toEqual({ version: 'v1' })
+  })
+
+  it('keeps expired data only for an explicit stale fallback', () => {
+    vi.spyOn(Date, 'now').mockReturnValue(1_000)
+    writePersistentJsonCache('map:floor:L1', ['poi-1'], 100)
+    vi.spyOn(Date, 'now').mockReturnValue(1_101)
+
+    expect(readPersistentJsonCache<string[]>('map:floor:L1')).toBeNull()
+    expect(readPersistentJsonCache<string[]>('map:floor:L1', true)).toEqual(['poi-1'])
+  })
+
+  it('does not persist an oversized payload', () => {
+    const largePayload = 'x'.repeat(200 * 1024)
+
+    expect(writePersistentJsonCache('map:large', largePayload, 60_000)).toBe(false)
+    expect(localStorage.getItem('map:large')).toBeNull()
+  })
+})