File size: 2,264 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 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 |
import * as React from 'react'
import { render, RenderResult } from '@testing-library/react'
import { is } from '@react-spring/shared'
import { Lookup } from '@react-spring/types'
import { SpringValue } from '../SpringValue'
import { useTrail, UseTrailProps } from './useTrail'
describe('useTrail', () => {
let springs: Lookup<SpringValue>[]
// Call the "useSprings" hook and update local variables.
const update = createUpdater(({ args }) => {
const result = useTrail(...args)
// @ts-expect-error - TODO: fix this type error.
springs = is.arr(result[0]) ? result[0] : result
return null
})
it('has each spring follow the spring before it', () => {
update(2, { x: 100, from: { x: 0 } })
expect(springs.length).toBe(2)
expect(springs[1].x.animation.to).toBe(springs[0].x)
global.mockRaf.step()
expect(springs[0].x.get()).not.toBe(springs[1].x.get())
})
describe('when a props object is passed', () => {
it('updates every spring on rerender', () => {
const props = { opacity: 1, config: { tension: 100 } }
update(2, props)
const configs = springs.map(s => s.opacity.animation.config)
expect(configs.every(config => config.tension == 100)).toBeTruthy()
props.config.tension = 50
update(2, props)
expect(configs.every(config => config.tension == 50)).toBeTruthy()
})
})
describe('when a props function is passed', () => {
it.todo('does nothing on rerender')
})
describe('with the "reverse" prop', () => {
describe('when "reverse" becomes true', () => {
it.todo('swaps the "to" and "from" props')
it.todo('has each spring follow the spring after it')
})
describe('when "reverse" becomes false', () => {
it.todo('uses the "to" and "from" props as-is')
it.todo('has each spring follow the spring before it')
})
})
})
function createUpdater(
Component: React.ComponentType<{ args: [any, any, any?] }>
) {
let result: RenderResult | undefined
afterEach(() => {
result = undefined
})
type Args = [number, UseTrailProps, any[]?]
return (...args: Args) => {
const elem = <Component args={args} />
if (result) result.rerender(elem)
else result = render(elem)
return result
}
}
|