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import * as React from 'react'
import { render, RenderResult } from '@testing-library/react'
import { type ISpringContext, SpringContextProvider } from './SpringContext'
import { SpringValue } from './SpringValue'
import { useSpring } from './hooks'
describe('SpringContext', () => {
let t: SpringValue<number>
const Child = () => {
t = useSpring({ t: 1, from: { t: 0 } }).t
return null
}
const update = createUpdater(props => (
<SpringContextProvider {...props}>
<Child />
</SpringContextProvider>
))
it('only merges when changed', () => {
const context: ISpringContext = {}
const onProps = jest.fn()
const Test = () => {
useSpring({ onProps, x: 0 })
return null
}
const getRoot = () => (
<SpringContextProvider {...context}>
<Test />
</SpringContextProvider>
)
const expectUpdates = (updates: any[]) => {
onProps.mock.calls.forEach((args, i) => {
const update = updates[i]
if (update) {
expect(args[0]).toMatchObject(update)
} else {
// Unexpected update.
expect(args[0]).toBeUndefined()
}
})
onProps.mockClear()
}
const elem = render(getRoot())
expectUpdates([{ onProps, to: { x: 0 } }])
context.pause = true
elem.rerender(getRoot())
expectUpdates([{ default: context }, { onProps, to: { x: 0 } }])
elem.rerender(getRoot())
expectUpdates([{ onProps, to: { x: 0 } }])
})
it('can pause current animations', () => {
update({})
global.mockRaf.step()
expect(t.idle).toBeFalsy()
update({ pause: true })
expect(t.idle).toBeTruthy()
expect(t.goal).toBe(1)
update({ pause: false })
expect(t.idle).toBeFalsy()
expect(t.goal).toBe(1)
})
it('can pause future animations', () => {
// Paused right away.
update({ pause: true })
expect(t.idle).toBeTruthy()
expect(t.goal).toBeUndefined()
// This update is paused too.
t.start(2)
expect(t.idle).toBeTruthy()
expect(t.goal).toBeUndefined()
// Let it roll.
update({ pause: false })
expect(t.idle).toBeFalsy()
// The `goal` is not 2, because the `useSpring` hook is
// executed by the SpringContext update.
expect(t.goal).toBe(1)
})
it('can make current animations immediate', () => {
update({})
global.mockRaf.step()
expect(t.idle).toBeFalsy()
update({ immediate: true })
global.mockRaf.step()
expect(t.idle).toBeTruthy()
expect(t.get()).toBe(1)
})
it('can make future animations immediate', () => {
update({ immediate: true })
global.mockRaf.step()
expect(t.idle).toBeTruthy()
expect(t.get()).toBe(1)
t.start(2)
global.mockRaf.step()
expect(t.idle).toBeTruthy()
expect(t.get()).toBe(2)
})
})
function createUpdater(Component: React.ComponentType<ISpringContext>) {
let result: RenderResult | undefined
afterEach(() => {
result = undefined
})
return (props: ISpringContext) => {
const elem = <Component {...props} />
if (result) result.rerender(elem)
else result = render(elem)
return result
}
}
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