import { describe, expect, it } from 'vitest'
import { formCoverAspectRatio } from '@/features/subject-images/layout'
import { formFixture, imageFixture } from '@/features/subject-images/testing/fixtures'

describe('图库瀑布流图片比例', () => {
    it.each([
        [800, 1200],
        [1600, 900],
        [1024, 1024]
    ])('保留正式图片尺寸 %s × %s', (width, height) => {
        const form = formFixture()
        form.images = [imageFixture({ width, height })]
        expect(formCoverAspectRatio(form)).toBe(`${width} / ${height}`)
    })

    it.each([null, 0, -1, NaN, Infinity])('尺寸 %s 无效时使用稳定占位比例', width => {
        const form = formFixture()
        form.images = [imageFixture({ width })]
        expect(formCoverAspectRatio(form)).toBe('4 / 3')
        form.images = [imageFixture({ height: width })]
        expect(formCoverAspectRatio(form)).toBe('4 / 3')
    })

    it('无图片时保留占位，候选封面也使用自己的尺寸', () => {
        const form = formFixture()
        form.images = []
        expect(formCoverAspectRatio(form)).toBe('4 / 3')
        form.images = [imageFixture({ isPrimary: false, width: 800, height: 1200 })]
        expect(formCoverAspectRatio(form)).toBe('800 / 1200')
    })
})