markdown-it demo

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```xml

<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-core</artifactId>
    <version>5.3.1</version>
    <scope>test</scope>
</dependency>
```
```java
import static org.mockito.Mockito.*;
public class CalculatorTest {
    @Test
    public void testAddition() {
        // 建立 Calculator 的 mock 物件
        Calculator calculator = mock(Calculator.class);
        // 設定當呼叫 calculator.add(2, 3) 時，回傳 5
        when(calculator.add(2, 3)).thenReturn(5);
        // 測試
        int result = calculator.add(2, 3);
        assertEquals(5, result);
        // 確認方法是否有被呼叫
        verify(calculator).add(2, 3);
    }
}
```

### MockitoJUnitRunner
```java
@RunWith(MockitoJUnitRunner.class)
public class MyServiceTest {
    @Mock
    private MyRepository repository;
    @InjectMocks
    private MyService service;
    @Test
    public void testMyService() {
        when(repository.findById(1L)).thenReturn(new MyEntity());
        MyEntity result = service.findById(1L);
        assertNotNull(result);
    }
}
```

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