How to use MultiLevelNestedTest class of org.mockitousage package

Best Mockito code snippet using org.mockitousage.MultiLevelNestedTest

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...9import org.mockito.Mock;10import org.mockito.junit.jupiter.MockitoExtension;11import static org.assertj.core.api.Assertions.assertThat;12@ExtendWith(MockitoExtension.class)13class MultiLevelNestedTest {14 @Mock15 private Runnable level1Mock;16 @Nested17 class Level2Class {18 @Mock Runnable level2Mock;19 @Test20 void mocks_created() {21 assertThat(level1Mock).isNotNull();22 assertThat(level2Mock).isNotNull();23 }24 @Nested25 class Level3Class {26 @Mock Runnable level3Mock;27 @Test...

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You could refactor MyClass so that it uses dependency injection. Instead of having it create an AnythingPerformerClass instance you could pass in an instance of the class to the constructor of MyClass like so :

class MyClass {

   private final AnythingPerformerClass clazz;

   MyClass(AnythingPerformerClass clazz) {
      this.clazz = clazz;
   }

   public boolean performAnything() {         
     return clazz.doSomething();        
   }
}

You can then pass in the mock implementation in the unit test

@Test
public void testPerformAnything() throws Exception {
   AnythingPerformerClass mockedPerformer = Mockito.mock(AnythingPerformerClass.class);
   MyClass clazz = new MyClass(mockedPerformer);
   ...
}

Alternatively, if your AnythingPerformerClass contains state then you could pass a AnythingPerformerClassBuilder to the constructor.

https://stackoverflow.com/questions/17743141/mock-class-in-class-under-test

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