Test migration to jest by hand

Apparently using regular expressions is way easier.

test/sortedLastIndex/sortedLastIndex.test.js

@@ -0,0 +1,10 @@
+const expect = require('expect');
+const sortedLastIndex = require('./sortedLastIndex.js');
+
+
+  test('sortedLastIndex is a Function', () => {
+  expect(sortedLastIndex).toBeInstanceOf(Function);
+});
+  t.equal(sortedLastIndex([10, 20, 30, 30, 40], 30), 4, 'Returns the highest index to insert the element without messing up the list order');
+  
+