import { describe, expect, it } from 'vitest'
import { getGuideRendererPixelRatio } from '@/services/performance/rendererPerformance'

describe('rendererPerformance', () => {
  it('keeps desktop high-density displays within the desktop cap', () => {
    expect(getGuideRendererPixelRatio({ devicePixelRatio: 3, viewportWidth: 1440 }, 1.5)).toBe(1.5)
  })

  it('uses a lower pixel ratio cap on mobile displays', () => {
    expect(getGuideRendererPixelRatio({
      devicePixelRatio: 3,
      maxTouchPoints: 5,
      viewportWidth: 390,
      userAgent: 'iPhone'
    }, 1.5)).toBe(1.25)
  })

  it('uses the minimum cap for constrained devices or save-data mode', () => {
    expect(getGuideRendererPixelRatio({
      devicePixelRatio: 2,
      deviceMemory: 2,
      hardwareConcurrency: 2,
      saveData: true
    }, 1.5)).toBe(1)
  })
})