Test migration to jest by hand

Apparently using regular expressions is way easier.

test/howManyTimes/howManyTimes.js

@@ -0,0 +1,11 @@
+const howManyTimes = (num, divisor) => {
+if (divisor === 1 || divisor === -1) return Infinity;
+if (divisor === 0) return 0;
+let i = 0;
+while (Number.isInteger(num / divisor)) {
+i++;
+num = num / divisor;
+}
+return i;
+};
+module.exports = howManyTimes;