Setup Unit testing

[Ilyas Karim]

• Setup Unit testing [Assigned to @ilyaskarim]
• Write Unit tests for Database
• Write Unit tests for GraphQL
• Write Unit tests for Queue [Assigned to @Naveed-Harri ]
• Write Unit tests for WebSockets and Socket.IO [Assigned to @ilyaskarim]
• Write Unit tests for Cron Jobs
• Write Unit tests for Storage
• Write Unit tests for Mailer
• Write Unit tests for modules