slf4j-log4j12/src/test/java/org/slf4j/InvocationTest.java

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 * Copyright (c) 2004-2005 QOS.CH
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package org.slf4j;

import java.util.HashMap;
import java.util.Map;

import org.apache.log4j.spi.LoggingEvent;

import junit.framework.TestCase;

/**
 * Test whether invoking the SLF4J API causes problems or not.
 * 
 * @author Ceki Gulcu
 * 
 */
public class InvocationTest extends TestCase {

  ListAppender listAppender = new ListAppender();
  org.apache.log4j.Logger root;
  public InvocationTest(String arg0) {
    super(arg0);
  }

  protected void setUp() throws Exception {
    super.setUp();
    root = org.apache.log4j.Logger.getRootLogger();
    root.addAppender(listAppender);

  }

  protected void tearDown() throws Exception {
    super.tearDown();
    root.getLoggerRepository().resetConfiguration();
  }

  public void test1() {
    Logger logger = LoggerFactory.getLogger("test1");
    logger.debug("Hello world.");
    assertEquals(1, listAppender.list.size());
  }

  public void test2() {
    Integer i1 = new Integer(1);
    Integer i2 = new Integer(2);
    Integer i3 = new Integer(3);
    Exception e = new Exception("This is a test exception.");
    Logger logger = LoggerFactory.getLogger("test2");

    logger.trace("Hello trace.");
    
    logger.debug("Hello world 1.");
    logger.debug("Hello world {}", i1);
    logger.debug("val={} val={}", i1, i2);
    logger.debug("val={} val={} val={}", new Object[] { i1, i2, i3 });

    logger.debug("Hello world 2", e);
    logger.info("Hello world 2.");

    logger.warn("Hello world 3.");
    logger.warn("Hello world 3", e);

    logger.error("Hello world 4.");
    logger.error("Hello world {}", new Integer(3));
    logger.error("Hello world 4.", e);
    assertEquals(11, listAppender.list.size());
  }

  public void testNull() {
    Logger logger = LoggerFactory.getLogger("testNull");
    logger.trace(null);
    logger.debug(null);
    logger.info(null);
    logger.warn(null);
    logger.error(null);

    Exception e = new Exception("This is a test exception.");
    logger.debug(null, e);
    logger.info(null, e);
    logger.warn(null, e);
    logger.error(null, e);
    assertEquals(8, listAppender.list.size());
  }
  
  // http://bugzilla.slf4j.org/show_bug.cgi?id=78
  public void testNullParameter_BUG78() {
    Logger logger = LoggerFactory.getLogger("testNullParameter_BUG78");
    String[] parameters = null;
    String msg = "hello {}";
    
    logger.debug(msg, parameters);
    assertEquals(1, listAppender.list.size());
    LoggingEvent e = (LoggingEvent) listAppender.list.get(0);
    assertEquals(msg, e.getMessage());
  }
  
  public void testMarker() {
    Logger logger = LoggerFactory.getLogger("testMarker");
    Marker blue = MarkerFactory.getMarker("BLUE");
    logger.trace(blue, "hello");
    logger.debug(blue, "hello");
    logger.info(blue, "hello");
    logger.warn(blue, "hello");
    logger.error(blue, "hello");

    logger.debug(blue, "hello {}", "world");
    logger.info(blue, "hello {}", "world");
    logger.warn(blue, "hello {}", "world");
    logger.error(blue, "hello {}", "world");

    logger.debug(blue, "hello {} and {} ", "world", "universe");
    logger.info(blue, "hello {} and {} ", "world", "universe");
    logger.warn(blue, "hello {} and {} ", "world", "universe");
    logger.error(blue, "hello {} and {} ", "world", "universe");
    assertEquals(12, listAppender.list.size());
  }

  public void testMDC() {
    MDC.put("k", "v");
    assertNotNull(MDC.get("k"));
    assertEquals("v", MDC.get("k"));

    MDC.remove("k");
    assertNull(MDC.get("k"));

    MDC.put("k1", "v1");
    assertEquals("v1", MDC.get("k1"));
    MDC.clear();
    assertNull(MDC.get("k1"));

    try {
      MDC.put(null, "x");
      fail("null keys are invalid");
    } catch (IllegalArgumentException e) {
    }
  }
  
  public void testMDCContextMapValues() {
    Map map = new HashMap();
    map.put("ka", "va");
    map.put("kb", "vb");
    
    MDC.put("k", "v");
    assertEquals("v", MDC.get("k"));
    MDC.setContextMap(map);
    assertNull(MDC.get("k"));
    assertEquals("va", MDC.get("ka"));
    assertEquals("vb", MDC.get("kb"));
  }
  
}