Migrated tests to jest

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

test5/pullBy/pullBy.js

@@ -0,0 +1,10 @@
+const pullBy = (arr, ...args) => {
+const length = args.length;
+let fn = length > 1 ? args[length - 1] : undefined;
+fn = typeof fn == 'function' ? (args.pop(), fn) : undefined;
+let argState = (Array.isArray(args[0]) ? args[0] : args).map(val => fn(val));
+let pulled = arr.filter((v, i) => !argState.includes(fn(v)));
+arr.length = 0;
+pulled.forEach(v => arr.push(v));
+};
+module.exports = pullBy;

test5/pullBy/pullBy.test.js

@@ -0,0 +1,11 @@
+const expect = require('expect');
+const pullBy = require('./pullBy.js');
+
+test('Testing pullBy', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof pullBy === 'function').toBeTruthy();
+  var myArray = [{ x: 1 }, { x: 2 }, { x: 3 }, { x: 1 }];
+  pullBy(myArray, [{ x: 1 }, { x: 3 }], o => o.x);
+  expect(myArray).toEqual([{ x: 2 }]);
+});