import static org.mockito.Mockito.when;

import java.util.List;

import org.mockito.Mock;
import org.mockito.testng.MockitoTestNGListener;
import org.testng.Assert;
import org.testng.annotations.Listeners;
import org.testng.annotations.Test;

@Listeners(MockitoTestNGListener.class)
public class MockitoTest {
  
  @Mock
  List<String> mockList;

  @Test
  void mock_list_returns_correct_elements() {
    when(mockList.get(0)).thenReturn("foo");    
    Assert.assertEquals(mockList.get(0), "foo");
  }
}