joywayerandClaude Opus 5
e49c28eae8
切分可逆, 故「重组(切分(原图)) 的像素 === 原图像素」是对全部 1006 帧的完全验证, 成本近零。比较解码后的像素缓冲而非文件字节(编码参数不同会让同像素图字节不同)。 verify-frames CLI 对全部 139 张多帧图跑该校验, 任一失败退出码 1。 Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
74 lines
3.0 KiB
JavaScript
74 lines
3.0 KiB
JavaScript
import { test } from 'node:test';
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import assert from 'node:assert/strict';
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import { PNG } from 'pngjs';
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import { splitSheet, reassemble, pixelsEqual, verifySheet } from '../ui-migration/frame-io.mjs';
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/** 造一张 w×h 网格的测试图，每格填不同颜色，便于验证切分位置 */
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function makeSheet(cols, rows, cellW, cellH) {
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const png = new PNG({ width: cols * cellW, height: rows * cellH });
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for (let r = 0; r < rows; r++) {
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for (let c = 0; c < cols; c++) {
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const idx = r * cols + c; // 行优先编号
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for (let y = 0; y < cellH; y++) {
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for (let x = 0; x < cellW; x++) {
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const o = ((r * cellH + y) * png.width + (c * cellW + x)) << 2;
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png.data[o] = (idx * 20) & 0xff; // R 编码帧号，便于断言
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png.data[o + 1] = 0x40;
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png.data[o + 2] = 0x80;
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png.data[o + 3] = 0xff;
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}
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}
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}
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}
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return PNG.sync.write(png);
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}
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const IMG = { id: 1, w_all: 60, h_all: 40, w: 3, h: 2, frame_all: 6, bmp: 'test.png', w1: 20, h1: 20 };
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test('splitSheet 切出 frame_all 张，尺寸为单帧尺寸', () => {
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const frames = splitSheet(makeSheet(3, 2, 20, 20), IMG);
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assert.equal(frames.length, 6);
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const first = PNG.sync.read(frames[0]);
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assert.equal(first.width, 20);
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assert.equal(first.height, 20);
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});
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test('splitSheet 按行优先取帧：下标 0..5 的 R 通道依次为 0,20,40,60,80,100', () => {
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const frames = splitSheet(makeSheet(3, 2, 20, 20), IMG);
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const reds = frames.map((b) => PNG.sync.read(b).data[0]);
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assert.deepEqual(reds, [0, 20, 40, 60, 80, 100],
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'若切成列优先，顺序会变为 0,60,20,80,40,100');
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});
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test('reassemble(splitSheet(x)) 的像素与 x 完全一致（完全验证的核心不变量）', () => {
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const sheet = makeSheet(3, 2, 20, 20);
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const back = reassemble(splitSheet(sheet, IMG), IMG);
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assert.equal(pixelsEqual(sheet, back), true);
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});
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test('pixelsEqual 对像素不同的图返回 false', () => {
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const a = makeSheet(3, 2, 20, 20);
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const bPng = PNG.sync.read(a);
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bPng.data[0] = (bPng.data[0] + 1) & 0xff; // 改一个字节
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assert.equal(pixelsEqual(a, PNG.sync.write(bPng)), false);
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});
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test('pixelsEqual 忽略编码差异：同像素不同压缩等级仍为 true', () => {
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const src = PNG.sync.read(makeSheet(3, 2, 20, 20));
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const enc0 = PNG.sync.write(src, { deflateLevel: 0 });
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const enc9 = PNG.sync.write(src, { deflateLevel: 9 });
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assert.notEqual(Buffer.compare(enc0, enc9), 0, '前提：两种编码的文件字节确实不同');
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assert.equal(pixelsEqual(enc0, enc9), true, '但像素数据必须判为相同');
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});
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test('verifySheet 对正常图返回 ok', () => {
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assert.deepEqual(verifySheet(makeSheet(3, 2, 20, 20), IMG), { ok: true });
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});
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test('verifySheet 对尺寸与网格声明不符的图返回失败原因', () => {
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const wrong = makeSheet(2, 2, 20, 20); // 实际 40x40，但 IMG 声明 60x40
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const r = verifySheet(wrong, IMG);
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assert.equal(r.ok, false);
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assert.match(r.reason, /尺寸/);
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});
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