Do you use the Mockito library for writing tests?

Yes, the Mockito library is widely used for writing unit tests in Java. It allows creating mock objects — simulations of real classes, to isolate the tested code from dependencies.

Main features of Mockito:

• Creating mock objects.
• Configuring the behavior of mock object methods.
• Verifying method calls (verify).

Example of usage:

import static org.mockito.Mockito.*;

// Creating a mock
List<String> mockedList = mock(List.class);

// Configuring behavior
when(mockedList.get(0)).thenReturn("First element");

// Using
System.out.println(mockedList.get(0)); // Will output "First element"

// Verifying call
verify(mockedList).get(0);

Mockito helps write clean and independent tests, especially when the code depends on external services or complex objects.