update at 2026-02-14 11:20:38

tests/miniapp.spec.ts

@@ -103,4 +103,33 @@ describe('miniapp utils sankey', () => {
     expect(table.headers).toEqual(['source', 'target', 'value']);
     expect(table.rows).toEqual([['A', 'B', '1']]);
   });
+
+  it('文件名伪装为 csv 时，仍可根据二进制魔数识别 xlsx', () => {
+    const sheet = XLSX.utils.aoa_to_sheet([
+      ['source', 'target', 'value'],
+      ['A', 'B', 1]
+    ]);
+    const workbook = XLSX.utils.book_new();
+    XLSX.utils.book_append_sheet(workbook, sheet, 'S1');
+    const buffer = XLSX.write(workbook, { bookType: 'xlsx', type: 'buffer' });
+    const arrayBuffer = buffer.buffer.slice(buffer.byteOffset, buffer.byteOffset + buffer.byteLength);
+
+    const table = parseTableByFileName('wrong.csv', arrayBuffer);
+
+    expect(table.headers).toEqual(['source', 'target', 'value']);
+    expect(table.rows).toEqual([['A', 'B', '1']]);
+  });
+
+  it('csv 二进制内容应按 utf8 正常解析', () => {
+    const csvBuffer = Buffer.from('source,target,value\n甲,乙,1', 'utf8');
+    const arrayBuffer = csvBuffer.buffer.slice(
+      csvBuffer.byteOffset,
+      csvBuffer.byteOffset + csvBuffer.byteLength
+    );
+
+    const table = parseTableByFileName('demo.csv', arrayBuffer);
+
+    expect(table.headers).toEqual(['source', 'target', 'value']);
+    expect(table.rows).toEqual([['甲', '乙', '1']]);
+  });
 });