File size: 1,474 Bytes
1e92f2d |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 |
import createMockRaf, { MockRaf } from 'mock-raf'
import { raf, __raf } from './index'
import { Globals } from '@react-spring/shared'
let mockRaf: MockRaf
beforeEach(() => {
mockRaf = createMockRaf()
Globals.assign({
now: mockRaf.now,
requestAnimationFrame: mockRaf.raf,
})
raf.use(mockRaf.raf)
__raf.clear()
})
describe('raf looping', () => {
it('is not initially looping', () => {
expect(__raf.isRunning()).toBe(false)
})
it('loops when update is registered', () => {
raf(() => true)
expect(__raf.isRunning()).toBe(true)
mockRaf.step()
expect(__raf.isRunning()).toBe(true)
})
it('stops looping after single job', () => {
// eslint-disable-next-line @typescript-eslint/no-empty-function
raf(() => {})
mockRaf.step()
expect(__raf.isRunning()).toBe(true)
mockRaf.step()
expect(__raf.isRunning()).toBe(false)
})
it('resumes running jobs after stopping looping', () => {
const fn = jest.fn().mockReturnValue(false)
raf(fn)
mockRaf.step()
expect(fn).toHaveBeenCalledTimes(1)
raf(fn)
mockRaf.step()
expect(__raf.isRunning()).toBe(true)
mockRaf.step()
expect(__raf.isRunning()).toBe(false)
expect(fn).toHaveBeenCalledTimes(2)
})
it('loops as long as one update loop is scheduled', () => {
raf(() => true)
raf(() => false)
mockRaf.step()
expect(__raf.isRunning()).toBe(true)
mockRaf.step()
expect(__raf.isRunning()).toBe(true)
})
})
|