Refactor code/initial tests

tests/javascripts/timeoutPopup.test.js

@@ -0,0 +1,18 @@
+const timeoutPopup = require('../../app/assets/javascripts/timeoutPopup.js');
+
+
+describe('Test popup process', () => {
+    beforeEach(() => {
+        jest.useFakeTimers();
+    });
+
+    afterEach(() => {
+        jest.useRealTimers();
+    });
+
+    it('Test timers work', () => {
+        jest.runAllTimers();
+    });
+
+}); 
+