feat: prepare GoodBuddy 0.8.0

src/main/bounded-jpeg.test.ts

@@ -0,0 +1,45 @@
+import { describe, expect, it, vi } from 'vitest'
+import {
+  encodeBoundedJpeg,
+  MAX_BOUNDED_JPEG_BYTES
+} from './bounded-jpeg'
+
+function jpeg(size: number): Buffer {
+  const data = Buffer.alloc(size)
+  data[0] = 0xff
+  data[1] = 0xd8
+  data[data.length - 2] = 0xff
+  data[data.length - 1] = 0xd9
+  return data
+}
+
+describe('encodeBoundedJpeg', () => {
+  it('reduces quality and dimensions until the JPEG fits', () => {
+    const resize = vi.fn((options: { width: number }) =>
+      createImage(options.width)
+    )
+    const createImage = (width: number) => ({
+      getSize: () => ({ width, height: 800 }),
+      resize,
+      toJPEG: (quality: number) =>
+        jpeg(Math.ceil(width * quality * 12))
+    })
+
+    const result = encodeBoundedJpeg(createImage(2_000))
+
+    expect(result.byteLength).toBeLessThanOrEqual(
+      MAX_BOUNDED_JPEG_BYTES
+    )
+    expect(resize).toHaveBeenCalled()
+  })
+
+  it('rejects invalid encoder output', () => {
+    const image = {
+      getSize: () => ({ width: 100, height: 100 }),
+      resize: () => image,
+      toJPEG: () => Buffer.from('not-jpeg')
+    }
+
+    expect(() => encodeBoundedJpeg(image)).toThrow('内容无效')
+  })
+})