feat(fc3c): downloads Pinia store + sources.checkNow action + vitests

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/test/downloads.spec.js

@@ -0,0 +1,75 @@
+import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest'
+import { setActivePinia, createPinia } from 'pinia'
+import { useDownloadsStore } from '../src/stores/downloads.js'
+
+function stubFetch(handler) {
+  globalThis.fetch = vi.fn(async (url, init) => {
+    const { status, body } = handler(url, init)
+    return {
+      ok: status >= 200 && status < 300,
+      status, statusText: String(status),
+      text: async () => (body == null ? '' : JSON.stringify(body)),
+    }
+  })
+}
+
+describe('downloads store', () => {
+  beforeEach(() => setActivePinia(createPinia()))
+  afterEach(() => vi.restoreAllMocks())
+
+  it('loadFirst populates events and cursor', async () => {
+    const s = useDownloadsStore()
+    stubFetch(() => ({
+      status: 200,
+      body: [
+        { id: 10, status: 'ok', summary: {} },
+        { id: 9, status: 'error', summary: {} },
+      ],
+    }))
+    await s.loadFirst()
+    expect(s.events.map(e => e.id)).toEqual([10, 9])
+    expect(s.cursor).toBe(9)
+    expect(s.hasMore).toBe(false)
+  })
+
+  it('loadMore appends and updates cursor', async () => {
+    const s = useDownloadsStore()
+    s.events = [{ id: 10, summary: {} }, { id: 9, summary: {} }]
+    s.cursor = 9
+    s.hasMore = true
+    stubFetch(() => ({
+      status: 200,
+      body: [{ id: 8, status: 'ok', summary: {} }],
+    }))
+    await s.loadMore()
+    expect(s.events.map(e => e.id)).toEqual([10, 9, 8])
+    expect(s.cursor).toBe(8)
+  })
+
+  it('applyFilter merges and reloads', async () => {
+    const s = useDownloadsStore()
+    const urls = []
+    stubFetch((url) => {
+      urls.push(url)
+      return { status: 200, body: [] }
+    })
+    await s.applyFilter({ status: 'error' })
+    expect(s.filter.status).toBe('error')
+    expect(urls[0]).toContain('status=error')
+  })
+
+  it('loadOne populates selected', async () => {
+    const s = useDownloadsStore()
+    stubFetch(() => ({ status: 200, body: { id: 42, metadata: { run_stats: {} } } }))
+    const out = await s.loadOne(42)
+    expect(s.selected.id).toBe(42)
+    expect(out.id).toBe(42)
+  })
+
+  it('closeDetail clears selected', async () => {
+    const s = useDownloadsStore()
+    s.selected = { id: 1 }
+    s.closeDetail()
+    expect(s.selected).toBe(null)
+  })
+})

frontend/test/sources.spec.js

@@ -78,4 +78,29 @@ describe('sources store', () => {
     expect(urls[0]).toContain('/api/artists/autocomplete')
     expect(urls[0]).toContain('q=al')
   })
+
+  it('checkNow posts to /api/sources/<id>/check', async () => {
+    const s = useSourcesStore()
+    const calls = []
+    stubFetch((url, init) => {
+      calls.push({ url, method: init?.method, body: init?.body ? JSON.parse(init.body) : null })
+      return { status: 202, body: { download_event_id: 7, status: 'pending' } }
+    })
+    const out = await s.checkNow(5)
+    expect(calls[0].url).toBe('/api/sources/5/check')
+    expect(calls[0].method).toBe('POST')
+    expect(out.download_event_id).toBe(7)
+  })
+
+  it('checkNow exposes the 409 download_event_id via error.body', async () => {
+    const s = useSourcesStore()
+    stubFetch(() => ({ status: 409, body: { download_event_id: 12, status: 'already_running' } }))
+    try {
+      await s.checkNow(5)
+    } catch (e) {
+      expect(e.body?.download_event_id).toBe(12)
+      return
+    }
+    throw new Error('Expected checkNow to throw on 409')
+  })
 })