How did you perform testing using mock objects in your projects?

Testing with mock objects allows isolating the component under test from dependencies by replacing real objects with their simulations. In my projects, I have used libraries such as Mockito (for Java/Kotlin) or Moq (for C#) to create mocks.

Example of usage:

• Create a mock for a dependency (e.g., a service or repository).
• Configure the mock's behavior (e.g., return specified data).
• Pass the mock into the class under test.
• Verify that the methods of the class under test call the necessary mock methods and handle data correctly.

This helps test logic without needing to access real databases, network services, etc., which speeds up tests and makes them more stable.