Migrated tests to jest

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

test2/extendHex/extendHex.js

@@ -0,0 +1,8 @@
+const extendHex = shortHex =>
+'#' +
+shortHex
+.slice(shortHex.startsWith('#') ? 1 : 0)
+.split('')
+.map(x => x + x)
+.join('');
+module.exports = extendHex;

test2/extendHex/extendHex.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const extendHex = require('./extendHex.js');
+
+test('Testing extendHex', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof extendHex === 'function').toBeTruthy();
+  expect(extendHex('#03f')).toBe('#0033ff');
+  expect(extendHex('05a')).toBe('#0055aa');
+});