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import { Interpolation } from './Interpolation'
import { Globals } from '@react-spring/shared'
Globals.assign({
to: (...args) => new Interpolation(...args),
})
import { assert, _ } from 'spec.ts'
import { SpringValue } from './SpringValue'
import { to } from './interpolate'
function spring<T>(value: T): SpringValue<T> {
return new SpringValue(value!)
}
describe('AnimatedValue interpolation options', () => {
it('accepts an AnimatedValue and a range shortcut config', () => {
const value = to(spring(1), [0, 1, 2], [4, 5, 6])
expect(value.get()).toBe(5)
})
it('accepts a config object with extrapolate extend', () => {
const value = to(spring(2), {
range: [0, 1],
output: [10, 20],
extrapolate: 'extend',
})
expect(value.get()).toBe(30)
})
it('accepts a config object with extrapolate clamp', () => {
const value = to(spring(100), {
range: [0, 1],
output: [10, 20],
extrapolate: 'clamp',
})
expect(value.get()).toBe(20)
})
it('accepts a config object with extrapolate identity', () => {
const value = to(spring(100), {
output: [10, 20],
extrapolate: 'identity',
})
expect(value.get()).toBe(100)
})
it('accepts an AnimatedValueArray and a range shortcut config', () => {
const value = to(spring([1, 2]), [1, 2], [4, 5])
expect(value.get()).toBe(4)
})
it('accepts multiple AnimatedValues and a range shortcut config', () => {
const value = to(
[spring(2), spring(4)],
[0, 2, 4, 6, 8],
[10, 20, 30, 40, 50]
)
assert(value, _ as Interpolation<number>)
expect(value.get()).toBe(20)
})
it('accepts multiple AnimatedValues and an interpolation function', () => {
const value = to([spring(5), spring('text')] as const, (a, b) => {
assert(a, _ as number)
assert(b, _ as string)
return `t(${a}, ${b})`
})
assert(value, _ as Interpolation<string>)
expect(value.get()).toBe('t(5, text)')
})
it('accepts an AnimatedValueArray and an interpolation function', () => {
const value = to(spring([1, 2, 3]), (r, g, b) => `rgb(${r}, ${g}, ${b})`)
expect(value.get()).toBe('rgba(1, 2, 3, 1)')
})
it('chains interpolations', () => {
const value = to(spring(1), [0, 1], [1, 2])
.to(x => x * 2)
.to([3, 4], [30, 40])
.to(x => x / 2)
expect(value.get()).toBe(20)
})
})
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