使用Mockito模拟回调函数

// 步骤2：定义回调函数的接口
public interface Callback {
    void onSuccess(String result);
    void onFailure(String error);
}

// 步骤3：创建被测试的类
public class CallbackExample {
    public void performOperation(Callback callback) {
        // 执行某些操作
        boolean success = true;
        
        if (success) {
            callback.onSuccess("Operation succeeded");
        } else {
            callback.onFailure("Operation failed");
        }
    }
}

// 步骤4：使用Mockito模拟回调函数
@Test
public void testPerformOperation() {
    Callback callback = Mockito.mock(Callback.class);
    Mockito.when(callback.onSuccess(Mockito.anyString())).thenReturn();
    Mockito.when(callback.onFailure(Mockito.anyString())).thenReturn();
    
    CallbackExample example = new CallbackExample();
    example.performOperation(callback);
    
    // 步骤6：验证回调函数的调用
    Mockito.verify(callback).onSuccess("Operation succeeded");
    Mockito.verify(callback, Mockito.never()).onFailure(Mockito.anyString());
}