Test migration to jest by hand

Apparently using regular expressions is way easier.

test/reverseString/reverseString.test.js

@@ -0,0 +1,9 @@
+const expect = require('expect');
+const reverseString = require('./reverseString.js');
+
+
+  test('reverseString is a Function', () => {
+  expect(reverseString).toBeInstanceOf(Function);
+});
+  t.equal(reverseString('foobar'), 'raboof', "Reverses a string.");
+