Test migration to jest by hand

Apparently using regular expressions is way easier.

test/sample/sample.test.js

@@ -0,0 +1,15 @@
+const expect = require('expect');
+const sample = require('./sample.js');
+
+
+  test('sample is a Function', () => {
+  expect(sample).toBeInstanceOf(Function);
+});
+  const arr = [3,7,9,11];
+  test('Returns a random element from the array', () => {
+  expect(arr.includes(sample(arr))).toBeTruthy();
+});
+  t.equal(sample([1]), 1, 'Works for single-element arrays');
+  t.equal(sample([]), undefined, 'Returns undefined for empty array');
+  
+