Feature 12: Regular dinners and onboarding (#94)

Co-authored-by: dev_agent <dev_agent@cubecraftlabs.com>

web/src/sw.test.ts

@@ -0,0 +1,47 @@
+// Runs the service worker's activate handler against mocked Cache Storage,
+// with the Workbox precache and router stubbed out. tsconfig.sw.json checks
+// this file with the worker's types, like src/sw.ts itself.
+import { afterEach, describe, expect, it, vi } from 'vitest'
+
+vi.mock('workbox-precaching', () => ({
+  PrecacheFallbackPlugin: class {},
+  matchPrecache: vi.fn(),
+  precacheAndRoute: vi.fn(),
+}))
+vi.mock('workbox-routing', () => ({ registerRoute: vi.fn() }))
+
+describe('service worker activation', () => {
+  afterEach(() => {
+    vi.unstubAllGlobals()
+  })
+
+  it('deletes the v1 API cache and keeps the precache, photo and font caches', async () => {
+    // A household on the v1 worker: its API cache held dinners with the
+    // pasted recipe_url; its photos and fonts are not in the precache.
+    const names = [
+      'mealquest-precache-v1',
+      'mealquest-api-v1',
+      'mealquest-media-v1',
+      'mealquest-fonts-v1',
+      'other-app-cache',
+    ]
+    const cacheStorage = {
+      keys: vi.fn(async () => names),
+      delete: vi.fn(async () => true),
+    }
+    vi.stubGlobal('caches', cacheStorage)
+    vi.stubGlobal('__WB_MANIFEST', [])
+    await import('./sw')
+
+    const pending: Promise<unknown>[] = []
+    const activate = Object.assign(new Event('activate'), {
+      waitUntil: (promise: Promise<unknown>) => pending.push(promise),
+    })
+    self.dispatchEvent(activate)
+    await Promise.all(pending)
+
+    expect(pending).toHaveLength(1)
+    expect(cacheStorage.delete).toHaveBeenCalledWith('mealquest-api-v1')
+    expect(cacheStorage.delete).toHaveBeenCalledTimes(1)
+  })
+})