Test migration to jest by hand

Apparently using regular expressions is way easier.

test/deepFlatten/deepFlatten.test.js

@@ -1,9 +1,9 @@
 const expect = require('expect');
 const deepFlatten = require('./deepFlatten.js');
 
-test('Testing deepFlatten', () => {
-  //For more information on all the methods supported by tape
-  //Please go to https://github.com/substack/tape
-  expect(typeof deepFlatten === 'function').toBeTruthy();
-  expect(deepFlatten([1, [2], [[3], 4], 5])).toEqual([1, 2, 3, 4, 5]);
-});
+
+  test('deepFlatten is a Function', () => {
+  expect(deepFlatten).toBeInstanceOf(Function);
+});
+  t.deepEqual(deepFlatten([1, [2], [[3], 4], 5]), [1, 2, 3, 4, 5], "Deep flattens an array");
+