| import { createInterpolator, Globals } from '.' |
| import { createStringInterpolator } from './stringInterpolation' |
| import { colors } from './colors' |
|
|
| beforeAll(() => { |
| Globals.assign({ |
| createStringInterpolator, |
| colors, |
| }) |
| }) |
|
|
| describe('Interpolation', () => { |
| it('should work with defaults', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: [0, 1], |
| }) |
|
|
| expect(interpolation(0)).toBe(0) |
| expect(interpolation(0.5)).toBe(0.5) |
| expect(interpolation(0.8)).toBe(0.8) |
| expect(interpolation(1)).toBe(1) |
| }) |
|
|
| it('should work with interpolation function as argument', () => { |
| const interpolation = createInterpolator<number, string>( |
| value => `scale(${value})` |
| ) |
|
|
| expect(interpolation(0)).toBe('scale(0)') |
| expect(interpolation(10.5)).toBe('scale(10.5)') |
| }) |
|
|
| it('should work with range arrays as arguments', () => { |
| const interpolation = createInterpolator([0, 1], [100, 200]) |
|
|
| expect(interpolation(0)).toBe(100) |
| expect(interpolation(0.5)).toBe(150) |
| expect(interpolation(0.8)).toBe(180) |
| expect(interpolation(1)).toBe(200) |
| }) |
|
|
| it('should work with output range', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: [100, 200], |
| }) |
|
|
| expect(interpolation(0)).toBe(100) |
| expect(interpolation(0.5)).toBe(150) |
| expect(interpolation(0.8)).toBe(180) |
| expect(interpolation(1)).toBe(200) |
| }) |
|
|
| it('should work with input range', () => { |
| const interpolation = createInterpolator({ |
| range: [100, 200], |
| output: [0, 1], |
| }) |
|
|
| expect(interpolation(100)).toBe(0) |
| expect(interpolation(150)).toBe(0.5) |
| expect(interpolation(180)).toBe(0.8) |
| expect(interpolation(200)).toBe(1) |
| }) |
|
|
| it('should work with keyframes without extrapolate', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1, 2], |
| output: [0.2, 1, 0.2], |
| extrapolate: 'clamp', |
| }) |
|
|
| expect(interpolation(5)).toBeCloseTo(0.2) |
| }) |
|
|
| it('should work with output ranges as string', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['rgba(0, 100, 200, 0)', 'rgba(50, 150, 250, 0.4)'], |
| }) |
|
|
| expect(interpolation(0)).toBe('rgba(0, 100, 200, 0)') |
| expect(interpolation(0.5)).toBe('rgba(25, 125, 225, 0.2)') |
| expect(interpolation(1)).toBe('rgba(50, 150, 250, 0.4)') |
| }) |
|
|
| it('should work with output ranges as short hex string', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['#024', '#9BF'], |
| }) |
|
|
| expect(interpolation(0)).toBe('rgba(0, 34, 68, 1)') |
| expect(interpolation(0.5)).toBe('rgba(77, 111, 162, 1)') |
| expect(interpolation(1)).toBe('rgba(153, 187, 255, 1)') |
| }) |
|
|
| it('should work with output ranges as long hex string', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['#FF9500', '#87FC70'], |
| }) |
|
|
| expect(interpolation(0)).toBe('rgba(255, 149, 0, 1)') |
| expect(interpolation(0.5)).toBe('rgba(195, 201, 56, 1)') |
| expect(interpolation(1)).toBe('rgba(135, 252, 112, 1)') |
| }) |
|
|
| it('should work with output ranges with mixed hex and rgba strings', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['rgba(100, 120, 140, 0.4)', '#87FC70'], |
| }) |
|
|
| expect(interpolation(0)).toBe('rgba(100, 120, 140, 0.4)') |
| expect(interpolation(0.5)).toBe('rgba(118, 186, 126, 0.7)') |
| expect(interpolation(1)).toBe('rgba(135, 252, 112, 1)') |
| }) |
|
|
| it('should work with negative and decimal values in string ranges', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['-100.5deg', '100deg'], |
| }) |
|
|
| expect(interpolation(0)).toBe('-100.5deg') |
| expect(interpolation(0.5)).toBe('-0.25deg') |
| expect(interpolation(1)).toBe('100deg') |
| }) |
|
|
| it('should interpolate between number and unit', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['0', '100%'], |
| }) |
|
|
| expect(interpolation(0.5)).toBe('50%') |
| }) |
|
|
| it('should support a mix of color patterns', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1, 2], |
| output: ['rgba(0, 100, 200, 0)', 'rgb(50, 150, 250)', 'red'], |
| }) |
|
|
| expect(interpolation(0)).toBe('rgba(0, 100, 200, 0)') |
| expect(interpolation(0.5)).toBe('rgba(25, 125, 225, 0.5)') |
| expect(interpolation(1.5)).toBe('rgba(153, 75, 125, 1)') |
| expect(interpolation(2)).toBe('rgba(255, 0, 0, 1)') |
| }) |
|
|
| it('should round rgb values', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['rgba(0, 0, 0, 0)', 'rgba(3, 3, 3, 1)'], |
| }) |
|
|
| expect(interpolation(0.5)).toBe('rgba(2, 2, 2, 0.5)') |
| }) |
|
|
| it('should not match partial color names', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['grayscale(0%)', 'grayscale(100%)'], |
| }) |
|
|
| expect(interpolation(0.5)).toBe('grayscale(50%)') |
| }) |
|
|
| describe('CSS Variables', () => { |
| const originalGetComputedStyle = window.getComputedStyle |
|
|
| const getComputedStyleMock = () => ({ |
| getPropertyValue: (variableName: '--from' | '--to' | '--no') => { |
| switch (variableName) { |
| case '--from': |
| return '#3cffd0' |
| case '--to': |
| return '#277ef4' |
| case '--no': |
| return undefined |
| default: |
| throw Error('Should never happen') |
| } |
| }, |
| }) |
|
|
| beforeAll(() => { |
| |
| window.getComputedStyle = getComputedStyleMock |
| }) |
| afterAll(() => { |
| window.getComputedStyle = originalGetComputedStyle |
| }) |
|
|
| it('should correctly parse variables', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['var(--to)', 'var(--from)'], |
| }) |
|
|
| expect(interpolation(0.0)).toBe('rgba(39, 126, 244, 1)') |
| expect(interpolation(0.5)).toBe('rgba(50, 191, 226, 1)') |
| expect(interpolation(1.0)).toBe('rgba(60, 255, 208, 1)') |
| }) |
|
|
| it('should return the fallbacks if the variable cannot be found', () => { |
| const interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['var(--no, pink)', 'var(--no, purple)'], |
| }) |
|
|
| expect(interpolation(0.0)).toBe('rgba(255, 192, 203, 1)') |
| expect(interpolation(0.5)).toBe('rgba(192, 96, 166, 1)') |
| expect(interpolation(1.0)).toBe('rgba(128, 0, 128, 1)') |
| }) |
|
|
| it('should correctly parse the fallback if its a variable', () => { |
| let interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['var(--no, --to)', 'var(--no, --from)'], |
| }) |
|
|
| expect(interpolation(0.0)).toBe('rgba(39, 126, 244, 1)') |
| expect(interpolation(0.5)).toBe('rgba(50, 191, 226, 1)') |
| expect(interpolation(1.0)).toBe('rgba(60, 255, 208, 1)') |
|
|
| interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['var(--no, var(--to))', 'var(--no, var(--from))'], |
| }) |
|
|
| expect(interpolation(0.0)).toBe('rgba(39, 126, 244, 1)') |
| expect(interpolation(0.5)).toBe('rgba(50, 191, 226, 1)') |
| expect(interpolation(1.0)).toBe('rgba(60, 255, 208, 1)') |
|
|
| interpolation = createInterpolator({ |
| range: [0, 1], |
| output: ['var(--no, var(--no, pink))', 'var(--no, var(--no, purple))'], |
| }) |
|
|
| expect(interpolation(0.0)).toBe('rgba(255, 192, 203, 1)') |
| expect(interpolation(0.5)).toBe('rgba(192, 96, 166, 1)') |
| expect(interpolation(1.0)).toBe('rgba(128, 0, 128, 1)') |
| }) |
| }) |
| }) |
|
|
