How to test a class designed with the Singleton Pattern?
To assess a class implemented with the Singleton Pattern, it is essential to first confirm its correct implementation. One method to validate the class involves creating multiple instances of it and subsequently comparing the memory addresses of each instance. This comparison helps ascertain whether they reference the same object, thereby confirming the proper utilization of the design pattern.
After confirming the class’s correctness, another approach to assess its functionality is to develop unit tests for each of its methods. These tests should encompass various scenarios, including positive, negative, and boundary cases that the method must handle. For instance, a unit test could be crafted to verify that a Singleton class appropriately returns an existing instance when a new instance is requested.
Most asked Singleton Design Pattern Interview Questions
This article comprises some of the most asked Singleton design pattern interview questions, which will help you tackle any Singleton design pattern question properly.