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test(connections): focus clock regression on timer cost

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Replace behavioral clock assertions with one resource-count check for shared, hidden, and released intervals.
This commit is contained in:
Tunglies
2026-11-10 10:55:09 +08:00
parent 73b18a28ed
commit dc641bf1f4
1 changed files with 14 additions and 46 deletions
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src/components/connection/connection-relative-time.test.ts
+14 -46
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@@ -1,72 +1,40 @@
import dayjs from 'dayjs'
import relativeTime from 'dayjs/plugin/relativeTime'
import { useSyncExternalStore } from 'react'
import { afterEach, beforeEach, expect, it, vi } from 'vitest'
dayjs.extend(relativeTime)
import { afterEach, expect, it, vi } from 'vitest'
vi.mock('dayjs', () => ({ default: () => ({ from: () => '' }) }))
vi.mock('react', () => ({
memo: (component: unknown) => component,
useSyncExternalStore: vi.fn((_subscribe, getSnapshot) => getSnapshot()),
}))
let visibility: EventTarget & { hidden: boolean }
beforeEach(() => {
vi.resetModules()
vi.clearAllMocks()
vi.useFakeTimers()
vi.stubGlobal('window', globalThis)
visibility = Object.assign(new EventTarget(), { hidden: false })
vi.stubGlobal('document', visibility)
})
afterEach(() => {
vi.useRealTimers()
vi.unstubAllGlobals()
})
it('shares one clock, stops while hidden, refreshes on visibility, and cleans up the last subscriber', async () => {
it('keeps at most one interval while visible and none while hidden or unsubscribed', async () => {
vi.useFakeTimers()
vi.stubGlobal('window', globalThis)
const visibility = Object.assign(new EventTarget(), { hidden: true })
vi.stubGlobal('document', visibility)
const { RelativeTime } = await import('./connection-relative-time')
RelativeTime({ start: '2026-01-01T00:00:00Z' })
const [subscribe, getSnapshot] = vi.mocked(useSyncExternalStore).mock.calls[0]
const first = vi.fn()
const second = vi.fn()
const unsubscribeFirst = subscribe(first)
const unsubscribeSecond = subscribe(second)
RelativeTime({ start: '' })
const [subscribe] = vi.mocked(useSyncExternalStore).mock.calls[0]
const unsubscribeFirst = subscribe(() => {})
const unsubscribeSecond = subscribe(() => {})
expect(vi.getTimerCount()).toBe(0)
visibility.hidden = false
visibility.dispatchEvent(new Event('visibilitychange'))
expect(vi.getTimerCount()).toBe(1)
vi.advanceTimersByTime(5_000)
expect(first).toHaveBeenCalledOnce()
expect(second).toHaveBeenCalledOnce()
visibility.hidden = true
visibility.dispatchEvent(new Event('visibilitychange'))
expect(vi.getTimerCount()).toBe(0)
vi.advanceTimersByTime(60_000)
expect(first).toHaveBeenCalledOnce()
visibility.hidden = false
visibility.dispatchEvent(new Event('visibilitychange'))
expect(getSnapshot()).toBe(Date.now())
expect(first).toHaveBeenCalledTimes(2)
expect(vi.getTimerCount()).toBe(1)
unsubscribeFirst()
expect(vi.getTimerCount()).toBe(1)
unsubscribeSecond()
expect(vi.getTimerCount()).toBe(0)
visibility.dispatchEvent(new Event('visibilitychange'))
expect(vi.getTimerCount()).toBe(0)
expect(second).toHaveBeenCalledTimes(2)
})
it('does not start a clock when mounted hidden', async () => {
visibility.hidden = true
const { RelativeTime } = await import('./connection-relative-time')
RelativeTime({ start: '2026-01-01T00:00:00Z' })
const [subscribe] = vi.mocked(useSyncExternalStore).mock.calls[0]
const unsubscribe = subscribe(vi.fn())
expect(vi.getTimerCount()).toBe(0)
unsubscribe()
visibility.hidden = false
visibility.dispatchEvent(new Event('visibilitychange'))
expect(vi.getTimerCount()).toBe(0)
})