Java Log4j2:Junit测试用例失败
我正在为log4j2记录器编写JUnit测试用例,如下所示Java Log4j2:Junit测试用例失败,java,junit4,log4j2,Java,Junit4,Log4j2,我正在为log4j2记录器编写JUnit测试用例,如下所示 import static org.junit.Assert.assertTrue; import java.io.ByteArrayOutputStream; import java.io.PrintStream; import org.apache.logging.log4j.LogManager; import org.apache.logging.log4j.Logger; import org.junit.After; i
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
public class SampleLoggerTest {
private ByteArrayOutputStream outContent = new ByteArrayOutputStream();
private Logger logger = null;
private PrintStream sysOut = System.out;
@Before
public void setUpStreams() {
System.setOut(new PrintStream(outContent));
logger = LogManager.getLogger(SampleLoggerTest.class);
}
@After
public void restoreStreams() {
System.setOut(sysOut);
}
@Test
public void error() {
logger.error("OnLogger");
assertTrue(outContent.toString().contains("error"));
}
@Test
public void debug() {
logger.debug("OnLogger");
assertTrue(outContent.toString().contains("debug"));
}
@Test
public void fatal() {
logger.fatal("OnLogger");
assertTrue(outContent.toString().contains("fatal"));
}
@Test
public void info() {
logger.info("OnLogger");
assertTrue(outContent.toString().contains("info"));
}
@Test
public void warn() {
logger.warn("OnLogger");
assertTrue(outContent.toString().contains("warn"));
}
@Test
public void trace() {
logger.trace("OnLogger");
assertTrue(outContent.toString().contains("trace"));
}
}
但是只有一个测试用例是成功的,那就是,info()
我发现outContent
包含第一个测试用例的log语句,它是info()
,它是成功的,但是对于其余的测试用例outContent
是空白的
我尝试在restoreStreams()
中刷新/关闭流,但没有成功,我还检查了控制台输出,所有内容都被打印出来了,因为我一直将日志记录到跟踪
有人能帮我找到我在这件事上遗漏了什么吗
以下是控制台输出:
2018-04-19 11:53:31.636 INFO [main] [com.logger.SampleLoggerTest] [info] [com.logger.SampleLoggerTest.info(SampleLoggerTest.java:60)] - logger
2018-04-19 11:54:39.197 WARN [main] [com.logger.SampleLoggerTest] [warn] [com.logger.SampleLoggerTest.warn(SampleLoggerTest.java:69)] - logger
2018-04-19 11:54:41.790 DEBUG [main] [com.logger.SampleLoggerTest] [debug] [com.logger.SampleLoggerTest.debug(SampleLoggerTest.java:42)] - logger
2018-04-19 11:54:43.966 ERROR [main] [com.logger.SampleLoggerTest] [error] [com.logger.SampleLoggerTest.error(SampleLoggerTest.java:33)] - logger
2018-04-19 11:54:46.254 FATAL [main] [com.logger.SampleLoggerTest] [fatal] [com.logger.SampleLoggerTest.fatal(SampleLoggerTest.java:51)] - logger
2018-04-19 11:54:48.309 TRACE [main] [com.logger.SampleLoggerTest] [trace] [com.logger.SampleLoggerTest.trace(SampleLoggerTest.java:78)] - logger
log4j只初始化一次,因此
@Before
和@After
-方法不会影响Log4J2
SampleLoggerTest
中的另一个问题是ByteArrayOutputStream
,它在创建SampleLoggerTest
-类的实例时初始化一次,并且在第二次调用@Before
-方法时可能会关闭
以下代码适用于我:
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.Test;
public class SampleLoggerTest {
private static ByteArrayOutputStream outContent;
private static Logger logger = null;
private static PrintStream printStream;
@BeforeClass
public static void init() {
SampleLoggerTest.outContent = new ByteArrayOutputStream();
SampleLoggerTest.printStream = new PrintStream(SampleLoggerTest.outContent);
System.setOut(SampleLoggerTest.printStream);
SampleLoggerTest.logger = LogManager.getLogger(SampleLoggerTest.class);
}
@Test
public void debug() {
SampleLoggerTest.logger.debug("OnLogger");
Assert.assertTrue(SampleLoggerTest.outContent.toString().contains("DEBUG"));
}
@Test
public void error() {
SampleLoggerTest.logger.error("OnLogger");
Assert.assertTrue(SampleLoggerTest.outContent.toString().contains("ERROR"));
}
@Test
public void fatal() {
SampleLoggerTest.logger.fatal("OnLogger");
Assert.assertTrue(SampleLoggerTest.outContent.toString().contains("FATAL"));
}
@Test
public void info() {
SampleLoggerTest.logger.info("OnLogger");
Assert.assertTrue(SampleLoggerTest.outContent.toString().contains("INFO"));
}
@Test
public void trace() {
SampleLoggerTest.logger.trace("OnLogger");
Assert.assertTrue(SampleLoggerTest.outContent.toString().contains("TRACE"));
}
@Test
public void warn() {
SampleLoggerTest.logger.warn("OnLogger");
Assert.assertTrue(SampleLoggerTest.outContent.toString().contains("WARN"));
}
}
在执行最后一个@Test
-方法后,在我的例子中,它的跟踪
,ByteArrayOutputStream
如下所示:
10:44:32.848 [main] INFO de.crm.tools.SampleLoggerTest - OnLogger
10:44:32.848 [main] WARN de.crm.tools.SampleLoggerTest - OnLogger
10:44:47.601 [main] DEBUG de.crm.tools.SampleLoggerTest - OnLogger
10:44:47.601 [main] ERROR de.crm.tools.SampleLoggerTest - OnLogger
10:44:47.601 [main] FATAL de.crm.tools.SampleLoggerTest - OnLogger
10:44:47.601 [main] TRACE de.crm.tools.SampleLoggerTest - OnLogger
伟大的很好!谢谢你没有为我打印控制台。必须删除
系统。设置