站点同步

server/utils/site-sync/runner.test.ts

@@ -0,0 +1,55 @@
+import { afterEach, describe, expect, it, vi } from 'vitest'
+import { fetchSiteSyncJson, retrySiteSyncOperation } from './runner'
+
+afterEach(() => {
+  vi.unstubAllGlobals()
+})
+
+describe('fetchSiteSyncJson', () => {
+  it('retries a broken connection up to three attempts', async () => {
+    const fetchMock = vi.fn()
+      .mockRejectedValueOnce(new Error('connection reset'))
+      .mockRejectedValueOnce(new Error('connection reset'))
+      .mockResolvedValueOnce(new Response('{"ok":true}', {
+        status: 200,
+        headers: { 'Content-Type': 'application/json' }
+      }))
+    vi.stubGlobal('fetch', fetchMock)
+
+    await expect(fetchSiteSyncJson('http://target/api', 'token')).resolves.toEqual({ ok: true })
+    expect(fetchMock).toHaveBeenCalledTimes(3)
+  })
+
+  it('retries client errors because every sync failure gets three attempts', async () => {
+    const fetchMock = vi.fn().mockImplementation(() => Promise.resolve(
+      new Response('{"message":"invalid"}', {
+        status: 400,
+        headers: { 'Content-Type': 'application/json' }
+      })
+    ))
+    vi.stubGlobal('fetch', fetchMock)
+
+    await expect(fetchSiteSyncJson('http://target/api', 'token')).rejects.toThrow('invalid')
+    expect(fetchMock).toHaveBeenCalledTimes(3)
+  })
+
+  it('fails after three server errors', async () => {
+    const fetchMock = vi.fn().mockImplementation(() => Promise.resolve(
+      new Response('{"message":"unavailable"}', {
+        status: 503,
+        headers: { 'Content-Type': 'application/json' }
+      })
+    ))
+    vi.stubGlobal('fetch', fetchMock)
+
+    await expect(fetchSiteSyncJson('http://target/api', 'token')).rejects.toThrow('unavailable')
+    expect(fetchMock).toHaveBeenCalledTimes(3)
+  })
+
+  it('retries local sync failures and stops after the third attempt', async () => {
+    const operation = vi.fn().mockRejectedValue(new Error('database is busy'))
+
+    await expect(retrySiteSyncOperation(operation)).rejects.toThrow('database is busy')
+    expect(operation).toHaveBeenCalledTimes(3)
+  })
+})