Unit testing with jUnit5 and Mockito

Mocking for Spring injected dependencies

import org.junit.jupiter.api.Test;

@ExtendWith(MockitoExtension.class)

class Person {

   @Mock

   DependencyA dependencyA;

   // Don't use @InjectMocks if using constructor injection with final dependencies.
   // Mockito can't set the new mocks for each test

   TestedClass target;

   @BeforeEach

   public void setup() {

      // only needed if you do Mockito.when(dependencyA.methodAbc()).thenReturn() or similar

      MockitoAnnotations.initialize(this);  
      target = new TestedClass(dependencyA);

   }

   @Test

   public void testMethodWhatsyourname() {

      // given

      ...

      

      // when

      target.whatsYourName();

      // then 

      ...

   }

}