Migrated tests to jest

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

test2/dropRightWhile/dropRightWhile.js

@@ -0,0 +1,5 @@
+const dropRightWhile = (arr, func) => {
+while (arr.length > 0 && !func(arr[arr.length - 1])) arr = arr.slice(0, -1);
+return arr;
+};
+module.exports = dropRightWhile;

test2/dropRightWhile/dropRightWhile.test.js

@@ -0,0 +1,9 @@
+const expect = require('expect');
+const dropRightWhile = require('./dropRightWhile.js');
+
+test('Testing dropRightWhile', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof dropRightWhile === 'function').toBeTruthy();
+  expect(dropRightWhile([1, 2, 3, 4], n => n < 3)).toEqual([1, 2]);
+});