Powermock:模拟静态最终记录器

时间:2018-02-27 16:18:05

标签: java unit-testing logging mockito powermockito

我正在尝试编写检查是否已记录某些行的测试。我用谷歌搜索了一段时间,但我无法弄清楚为什么LOG没有被替换。

要测试的课程:

public class Example {
    private static final Logger LOG = LoggerFactory.getLogger(Example.class);

    public void foo(...)
    {
       if(...)
         LOG.warn("Warning");
       //...
    }
}

测试:

@RunWith(PowerMockRunner.class)
@PrepareForTest({LoggerFactory.class})
public class MyTest
{
    @Mock
    Logger logger;

    @InjectMocks
    private final Example example = new Example();

    @Test
    public void test1() {
        PowerMockito.mockStatic(LoggerFactory.class);
        logger = PowerMockito.mock(Logger.class);
        PowerMockito.when(LoggerFactory.getLogger(Example.class)).thenReturn(logger);

        example.foo(...);

        Mockito.verify(logger).warn("Warning");
    }
}

使用SLF4J和PowerMock 1.7.1。

PS:在此项目中无法替换private static final Logger LOG

1 个答案:

答案 0 :(得分:1)

您过早地创建主题。在创建主题后,您可以很好地安排模拟。

在安排静态模拟后创建主题

@RunWith(PowerMockRunner.class)
@PrepareForTest({LoggerFactory.class})
public class MyTest {

    @Test
    public void test1() {
        //Arrange
        Logger logger = PowerMockito.mock(Logger.class);

        PowerMockito.mockStatic(LoggerFactory.class);           
        PowerMockito.when(LoggerFactory.getLogger(Example.class)).thenReturn(logger);

        Example example = new Example();

        //Act
        example.foo(..);

        //Assert
        Mockito.verify(logger).warn("Warning");
    }
}