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Co-authored-by: dev_agent <dev_agent@cubecraftlabs.com> Co-committed-by: dev_agent <dev_agent@cubecraftlabs.com>
70 lines
2.4 KiB
TypeScript
70 lines
2.4 KiB
TypeScript
import { fireEvent, render, screen } from '@testing-library/react'
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import { useState } from 'react'
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import { describe, expect, it } from 'vitest'
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import { expectMinHitArea } from '../test/hitArea.ts'
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import { Slider } from './Slider.tsx'
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function Harness() {
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const [value, setValue] = useState(0.7)
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return (
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<Slider
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aria-label="Creativity (temperature)"
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min={0}
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max={1}
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step={0.1}
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value={value}
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onChange={(event) => setValue(Number(event.target.value))}
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/>
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)
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}
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describe('Slider', () => {
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it('is a native slider exposing its range and value', () => {
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render(<Harness />)
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const slider = screen.getByRole('slider', { name: 'Creativity (temperature)' })
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expect(slider).toHaveAttribute('type', 'range')
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expect(slider).toHaveAttribute('min', '0')
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expect(slider).toHaveAttribute('max', '1')
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expect(slider).toHaveValue('0.7')
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})
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it('updates the grape fill with the value', () => {
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render(<Harness />)
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const slider = screen.getByRole('slider')
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expect(slider.style.getPropertyValue('--slider-fill')).toBe('70%')
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fireEvent.change(slider, { target: { value: '0.2' } })
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expect(slider).toHaveValue('0.2')
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expect(slider.style.getPropertyValue('--slider-fill')).toBe('20%')
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})
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it('has a ≥ 44 px hit area', () => {
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render(<Harness />)
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expectMinHitArea(screen.getByRole('slider'))
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})
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it('fails fast on an empty range', () => {
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expect(() => render(<Slider aria-label="Bad" min={1} max={1} value={1} readOnly />)).toThrow(
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'max (1) must be greater than min (1)',
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)
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})
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it('accepts values at both ends of the range', () => {
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render(
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<>
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<Slider aria-label="At min" min={0} max={1} value={0} readOnly />
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<Slider aria-label="At max" min={0} max={1} value={1} readOnly />
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</>,
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)
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expect(screen.getByRole('slider', { name: 'At min' }).style.getPropertyValue('--slider-fill')).toBe('0%')
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expect(screen.getByRole('slider', { name: 'At max' }).style.getPropertyValue('--slider-fill')).toBe('100%')
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})
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it.each([
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[2, 'value (2) must be within [0, 1]'],
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[-0.1, 'value (-0.1) must be within [0, 1]'],
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[Number.NaN, 'value (NaN) must be within [0, 1]'],
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])('fails fast when the value %s is outside the range', (value, message) => {
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expect(() => render(<Slider aria-label="Bad" min={0} max={1} value={value} readOnly />)).toThrow(message)
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})
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})
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