Test migration to jest by hand

Apparently using regular expressions is way easier.

test/randomHexColorCode/randomHexColorCode.js

@@ -0,0 +1,5 @@
+const randomHexColorCode = () => {
+let n = (Math.random() * 0xfffff * 1000000).toString(16);
+return '#' + n.slice(0, 6);
+};
+module.exports = randomHexColorCode;

test/randomHexColorCode/randomHexColorCode.test.js

@@ -0,0 +1,16 @@
+const expect = require('expect');
+const randomHexColorCode = require('./randomHexColorCode.js');
+
+
+  test('randomHexColorCode is a Function', () => {
+  expect(randomHexColorCode).toBeInstanceOf(Function);
+});
+  t.equal(randomHexColorCode().length, 7);
+  test('The color code starts with "#"', () => {
+  expect(randomHexColorCode().startsWith('#')).toBeTruthy();
+});
+  test('The color code contains only valid hex-digits', () => {
+  expect(randomHexColorCode().slice(1).match(/[^0123456789abcdef]/i) === null).toBeTruthy();
+});
+  
+