test: exports in barrel 😅

package.json

@@ -55,6 +55,7 @@
     "eslint-plugin-prettier": "5.2.1",
     "eslint-plugin-simple-import-sort": "12.1.1",
     "eslint-plugin-unused-imports": "4.1.4",
+    "fast-glob": "3.3.2",
     "highlight.js": "11.10.0",
     "jest": "29.7.0",
     "jest-junit": "16.0.0",

src/index.spec.ts

@@ -0,0 +1,15 @@
+import { readFile } from 'node:fs/promises';
+
+import glob from 'fast-glob';
+
+const exports = await glob.async('src/{transformers,utils}/!(*.spec).ts', { onlyFiles: true });
+const barrel = await readFile('./src/index.ts', 'utf-8');
+
+describe('barrel', () => {
+  // lazy boy does not want to check all exports every time
+  // and neither does he want to generate the barrel file
+  it.each(exports)('exports %s', async file => {
+    const js = file.replace(/^src/, '.').replace(/\.ts$/, '.js');
+    expect(barrel).toEqual(expect.stringContaining(`export * from '${js}';`));
+  });
+});