Migrated tests to jest

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

test4/objectToPairs/objectToPairs.js

@@ -0,0 +1,2 @@
+const objectToPairs = obj => Object.keys(obj).map(k => [k, obj[k]]);
+module.exports = objectToPairs;

test4/objectToPairs/objectToPairs.test.js

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