Migrated tests to jest

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

test6/sampleSize/sampleSize.test.js

@@ -0,0 +1,14 @@
+const expect = require('expect');
+const sampleSize = require('./sampleSize.js');
+
+test('Testing sampleSize', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof sampleSize === 'function').toBeTruthy();
+  const arr = [3,7,9,11];
+  expect(sampleSize(arr).length).toBe(1);
+  expect(sampleSize(arr, 2).every(x => arr.includes(x))).toBeTruthy();
+  expect(sampleSize(arr, 5).length).toBe(4);
+  expect(sampleSize([], 2)).toEqual([]);
+  expect(sampleSize(arr, 0)).toEqual([]);
+});