Migrated tests to jest

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

test6/sample/sample.test.js

@@ -0,0 +1,12 @@
+const expect = require('expect');
+const sample = require('./sample.js');
+
+test('Testing sample', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof sample === 'function').toBeTruthy();
+  const arr = [3,7,9,11];
+  expect(arr.includes(sample(arr))).toBeTruthy();
+  expect(sample([1])).toBe(1);
+  expect(sample([])).toBe(undefined);
+});