运行单元测试时未调用Mockito模拟log4j appender

我想单元测试在我的代码中生成的日志语句。我正在使用slfj，log4j和Mockito。我现在用的是类似的代码如下从博客在 http://bloodredsun.com/2010/12/09/checking-logging-in-unit-tests/运行单元测试时未调用Mockito模拟log4j appender

当我运行它抛出异常的测试说，有0调用在行：

verify(mockAppender).doAppend(captorLoggingEvent.capture());

错误消息：

通缉但未调用：mockAppender.doAppend（）; - > at testClass.testLogAdviceAfterReturning（DpsOpsLoggerTest2.java:94）实际上，这个模拟与零交互。

我看到控制台上打印的日志。请求您提供帮助。

@RunWith(MockitoJUnitRunner.class) 
public class ExampleThatLogsTest { 

    @Mock 
    private Appender mockAppender; 
    @Captor 
    private ArgumentCaptor captorLoggingEvent; 

    @Before 
    public void setup() { 
     LogManager.getRootLogger().addAppender(mockAppender); 
    } 

    @After 
    public void teardown() { 
     LogManager.getRootLogger().removeAppender(mockAppender); 
    } 

    @Test 
    public void shouldConcatAndLog() { 
     //given 
     ExampleThatLogs example = new ExampleThatLogs(); 
     //when 
     String result = example.concat("foo", "bar"); 
     //then 
     assertEquals("foobar", result); 

     verify(mockAppender).doAppend(captorLoggingEvent.capture()); 
     LoggingEvent loggingEvent = captorLoggingEvent.getValue(); 
     //Check log level 
     assertThat(loggingEvent.getLevel(), is(Level.INFO)); 
     //Check the message being logged 
     assertThat(loggingEvent.getRenderedMessage(), 
      is("String a:foo, String b:bar")); 
    } 
}

来源

2015-10-07 John Liva

可以ü请给出错误日志 –

@AbdulManaf：我已更新错误消息。 –

@JohnLiva：你能告诉我们什么是ExampleThatLogs吗？它如何初始化其Logger？ – TobiSH

我试图模仿你的情况，在我结束它做工精细

//登录的Util

 public class LogUtil{ 

     final static Logger logger = Logger.getLogger(LogUtil.class); 

     public static Log`enter code here`ger getLogger() 
     { 
      return logger; 
     }

//类

public class RunMe { 

     public String runMe(String parameter) { 

      LogUtil.getLogger().info("This is info : " + parameter); 
      return "In runner " + parameter; 

     } 
    }

//单元测试

@RunWith(MockitoJUnitRunner.class) 
public class LoggerTest { 

    @Mock 
    private Appender mockAppender; 
    @Captor 
    private ArgumentCaptor captorLoggingEvent; 

    @Before 
    public void setup() { 

     LogUtil.getLogger().addAppender(mockAppender); 
     } 

    @Test 
    public void shouldConcatAndLog() { 

     RunMe runner=new RunMe(); 
     String result=runner.runMe("XYZ"); 
     assertEquals("In runner XYZ",result); 
     verify(mockAppender).doAppend((LoggingEvent) captorLoggingEvent.capture()); 
     LoggingEvent logevent= (LoggingEvent) captorLoggingEvent.getValue(); 
     assertThat(logevent.getLevel(), is(Level.INFO)); 
    } 

    @After 
    public void tearDown() { 
     LogUtil.getLogger().removeAllAppenders(); 
    } 
}

来源

2015-10-07 12:44:56

我知道这有些过时，但我也在为此而苦苦挣扎。我在被测试的类中的DEBUG级别上记录了语句。我在logback.xml中为被测试的类配置了INFO。将我的日志语句更改为INFO允许测试通过。另外，我还读了this Github帖子，它非常简洁并且测试日志输出的干净实现。希望别人会发现它有用。

来源

2016-10-20 17:13:45 Hodglem

运行单元测试时未调用Mockito模拟log4j appender

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