Test migration to jest by hand

Apparently using regular expressions is way easier.

test/stableSort/stableSort.test.js

@@ -0,0 +1,13 @@
+const expect = require('expect');
+const stableSort = require('./stableSort.js');
+
+
+  test('stableSort is a Function', () => {
+  expect(stableSort).toBeInstanceOf(Function);
+});
+  
+  const arr = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
+  const compare = () => 0;
+  t.deepEqual(stableSort(arr, compare), arr, 'Array is properly sorted');
+  
+