ran npm run tdd

test/gcd/gcd.js

@@ -1,4 +1,5 @@
-module.exports = gcd = (...arr) => {
+const gcd = (...arr) => {
 const _gcd = (x, y) => (!y ? x : gcd(y, x % y));
 return [...arr].reduce((a, b) => _gcd(a, b));
-};
+};
+ module.exports = gcd