Test migration to jest by hand

Apparently using regular expressions is way easier.

test/median/median.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const median = require('./median.js');
+
+
+  test('median is a Function', () => {
+  expect(median).toBeInstanceOf(Function);
+});
+  t.equal(median([5, 6, 50, 1, -5]), 5, "Returns the median of an array of numbers");
+  t.equal(median([1, 2, 3]), 2, "Returns the median of an array of numbers");
+