feat: 集成漫画源并支持在线阅读

src/_test/atomic-file.test.js

@@ -89,3 +89,36 @@ test('目录 fsync 失败不影响写入结果', () => {
   }
   assert.deepStrictEqual(JSON.parse(fs.readFileSync(dest, 'utf8')), { ok: true });
 });
+
+test('writeBytes 原子覆盖二进制文件且不残留临时文件', () => {
+  const dir = fresh('bytes');
+  const dest = path.join(dir, 'book.epub');
+  fs.writeFileSync(dest, Buffer.from([1, 2, 3]));
+  atomic.writeBytes(dest, Buffer.from([4, 5, 0, 255]));
+  assert.deepStrictEqual([...fs.readFileSync(dest)], [4, 5, 0, 255]);
+  assert.strictEqual(fs.existsSync(`${dest}.tmp`), false);
+  assert.strictEqual(fs.existsSync(`${dest}.bak`), false);
+});
+
+test('writeBytes 替换失败时恢复旧二进制内容', () => {
+  const dir = fresh('bytes-rollback');
+  const dest = path.join(dir, 'book.epub');
+  fs.writeFileSync(dest, Buffer.from([1, 2, 3]));
+  const realRename = fs.renameSync;
+  let failed = false;
+  fs.renameSync = function failing(from, to) {
+    if (!failed && String(from) === `${dest}.tmp` && String(to) === dest) {
+      failed = true;
+      throw new Error('模拟二进制替换失败');
+    }
+    return realRename.apply(this, arguments);
+  };
+  try {
+    assert.throws(() => atomic.writeBytes(dest, Buffer.from([9, 9])), /模拟二进制替换失败/);
+  } finally {
+    fs.renameSync = realRename;
+  }
+  assert.deepStrictEqual([...fs.readFileSync(dest)], [1, 2, 3]);
+  assert.strictEqual(fs.existsSync(`${dest}.tmp`), false);
+  assert.strictEqual(fs.existsSync(`${dest}.bak`), false);
+});