Migrated tests to jest

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

test2/delay/delay.test.js

@@ -0,0 +1,15 @@
+const expect = require('expect');
+const delay = require('./delay.js');
+
+test('Testing delay', () => {
+  //For more information on all the methods supported by tape
+  //Please go to https://github.com/substack/tape
+  expect(typeof delay === 'function').toBeTruthy();
+  delay(
+    function(text) {
+      expect(text).toBe('test');
+    },
+    1000,
+    'test'
+  );
+});