同步 sgs-frontend-mobile 源码

tests/unit/RendererPerformance.spec.ts

@@ -0,0 +1,26 @@
+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)
+  })
+})