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Original file line number Diff line number Diff line change
@@ -0,0 +1,44 @@
import { act, renderHook, waitFor } from '@testing-library/react'
import { useGPUDetailed } from '../useGPUDetailed'

const response = (body, status = 200) => ({
ok: status >= 200 && status < 300,
status,
json: async () => body,
})

describe('useGPUDetailed', () => {
afterEach(() => {
vi.useRealTimers()
vi.restoreAllMocks()
Object.defineProperty(document, 'hidden', { configurable: true, value: false })
})

test('loads initial GPU state while the document is hidden', async () => {
Object.defineProperty(document, 'hidden', { configurable: true, value: true })
vi.stubGlobal('fetch', vi.fn()
.mockResolvedValueOnce(response({ gpus: [{ name: 'GPU' }] }))
.mockResolvedValueOnce(response({ samples: [] }))
.mockResolvedValueOnce(response({ links: [] })))

const { result } = renderHook(() => useGPUDetailed())

await waitFor(() => expect(result.current.loading).toBe(false))
expect(fetch).toHaveBeenCalledTimes(3)
expect(result.current.detailed.gpus[0].name).toBe('GPU')
expect(result.current.error).toBeNull()
})

test('pauses after hidden initial data and resumes immediately when visible', async () => {
vi.useFakeTimers()
Object.defineProperty(document, 'hidden', { configurable: true, value: true })
vi.stubGlobal('fetch', vi.fn().mockResolvedValue(response({ gpus: [] })))
const { unmount } = renderHook(() => useGPUDetailed())
await act(async () => { await vi.advanceTimersByTimeAsync(20000) })
expect(fetch).toHaveBeenCalledTimes(3)
Object.defineProperty(document, 'hidden', { configurable: true, value: false })
await act(async () => { document.dispatchEvent(new Event('visibilitychange')) })
expect(fetch).toHaveBeenCalledTimes(6)
unmount()
})
})
Original file line number Diff line number Diff line change
Expand Up @@ -16,9 +16,10 @@ export function useGPUDetailed() {
// the replacement lifetime or release its in-flight guard.
let fetchInFlight = false
let disposed = false
let hasFetched = false
let activeController = null
const fetchAll = async () => {
if (disposed || document.hidden || fetchInFlight) return
if (disposed || (document.hidden && hasFetched) || fetchInFlight) return
fetchInFlight = true
const controller = new AbortController()
activeController = controller
Expand All @@ -38,6 +39,7 @@ export function useGPUDetailed() {
if (details !== undefined) setDetailed(details)
if (samples !== undefined) setHistory(samples)
if (links !== undefined) setTopology(links)
hasFetched = true
setError(null)
} catch (err) {
if (!disposed) setError(err.message)
Expand Down
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