✨feature: First push to git

tests/sheets.test.ts

@@ -0,0 +1,15 @@
+import { describe, expect, it } from 'vitest';
+import { escapeCell, sanitizeSheetName } from '../src/output/sheets.js';
+
+describe('sheet output helpers', () => {
+  it('sanitizes and truncates sheet names', () => {
+    const name = sanitizeSheetName('Bad:/\\\\?*[] name '.repeat(12));
+
+    expect(name).not.toMatch(/[:/\\?*[\]]/);
+    expect(name.length).toBeLessThanOrEqual(100);
+  });
+
+  it('escapes formula-like cell values', () => {
+    expect(escapeCell('=IMPORTXML("http://bad")')).toBe('\'=IMPORTXML("http://bad")');
+  });
+});