Migrated tests to jest

Used jest-codemods to migrate, will have to pass everything by hand before we can merge.

test/randomIntegerInRange/randomIntegerInRange.js

@@ -1,2 +0,0 @@
-const randomIntegerInRange = (min, max) => Math.floor(Math.random() * (max - min + 1)) + min;
-module.exports = randomIntegerInRange;