Test migration to jest by hand

Apparently using regular expressions is way easier.

test/maxBy/maxBy.js

@@ -0,0 +1,2 @@
+const maxBy = (arr, fn) => Math.max(...arr.map(typeof fn === 'function' ? fn : val => val[fn]));
+module.exports = maxBy;

test/maxBy/maxBy.test.js

@@ -0,0 +1,15 @@
+const expect = require('expect');
+const maxBy = require('./maxBy.js');
+
+
+  test('maxBy is a Function', () => {
+  expect(maxBy).toBeInstanceOf(Function);
+});
+  test('Produces the right result with a function', () => {
+  expect(maxBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], o => o.n), 8).toBe()
+});
+  test('Produces the right result with a property name', () => {
+  expect(maxBy([{ n: 4 }, { n: 2 }, { n: 8 }, { n: 6 }], 'n'), 8).toBe()
+});
+  
+