What experience do you have with using Mockito for testing mock objects?

Mockito is a popular library for creating mock objects in Java, which helps isolate the code under test from dependencies.

The main usage experience includes:

• Creating mocks using Mockito.mock() or the @Mock annotation.
• Configuring the behavior of mock methods with when(...).thenReturn(...).
• Verifying method calls with verify().
• Using ArgumentCaptor to capture and verify call arguments.

Example:

import static org.mockito.Mockito.*;

List<String> mockedList = mock(List.class);
when(mockedList.get(0)).thenReturn("first");

System.out.println(mockedList.get(0)); // outputs "first"

verify(mockedList).get(0);

This approach allows testing logic without real dependencies, speeding up and simplifying test writing.