Test migration to jest by hand

Apparently using regular expressions is way easier.

test/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;

test/pullBy/pullBy.test.js

@@ -0,0 +1,12 @@
+const expect = require('expect');
+const pullBy = require('./pullBy.js');
+
+
+  test('pullBy is a Function', () => {
+  expect(pullBy).toBeInstanceOf(Function);
+});
+  var myArray = [{ x: 1 }, { x: 2 }, { x: 3 }, { x: 1 }];
+  pullBy(myArray, [{ x: 1 }, { x: 3 }], o => o.x);
+  t.deepEqual(myArray, [{ x: 2 }], 'Pulls the specified values');
+  
+