Test migration to jest by hand

Apparently using regular expressions is way easier.

test/takeRightWhile/takeRightWhile.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const takeRightWhile = require('./takeRightWhile.js');
+
+
+  test('takeRightWhile is a Function', () => {
+  expect(takeRightWhile).toBeInstanceOf(Function);
+});
+  t.deepEqual(takeRightWhile([1, 2, 3, 4], n => n < 3), [3, 4], 'Removes elements until the function returns true');
+  
+