/**
    * Logback: the reliable, generic, fast and flexible logging framework.
    * Copyright (C) 1999-2015, QOS.ch. All rights reserved.
    *
    * This program and the accompanying materials are dual-licensed under
    * either the terms of the Eclipse Public License v1.0 as published by
    * the Eclipse Foundation
    *
    *   or (per the licensee's choosing)
   *
   * under the terms of the GNU Lesser General Public License version 2.1
   * as published by the Free Software Foundation.
   */
  package ch.qos.logback.classic.jul;
  
  import ch.qos.logback.classic.Level;
  import ch.qos.logback.classic.Logger;
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.core.testUtil.RandomUtil;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  
  public class LevelChangePropagatorTest {
      int rand = RandomUtil.getPositiveInt();
      LoggerContext loggerContext = new LoggerContext();
      LevelChangePropagator levelChangePropagator = new LevelChangePropagator();
  
      @BeforeEach
      public void setUp() {
          levelChangePropagator.setContext(loggerContext);
          loggerContext.addListener(levelChangePropagator);
      }
  
      void checkLevelChange(String loggerName, Level level) {
          Logger logger = loggerContext.getLogger(loggerName);
          logger.setLevel(level);
          java.util.logging.Logger julLogger = JULHelper.asJULLogger(logger);
          java.util.logging.Level julLevel = JULHelper.asJULLevel(level);
  
          assertEquals(julLevel, julLogger.getLevel());
      }
  
  
  
      @Test
      public void smoke() {
          checkLevelChange("a", Level.INFO);
          checkLevelChange("a.b", Level.DEBUG);
      }
  
      @Test
      public void root() {
          checkLevelChange(Logger.ROOT_LOGGER_NAME, Level.TRACE);
      }
  
      // see http://jira.qos.ch/browse/LBCLASSIC-256
      @Test
      public void gc() {
          Logger logger = loggerContext.getLogger("gc" + rand);
          logger.setLevel(Level.INFO);
          // invoke GC so that the relevant julLogger can be garbage collected.
          System.gc();
          java.util.logging.Logger julLogger = JULHelper.asJULLogger(logger);
          java.util.logging.Level julLevel = JULHelper.asJULLevel(Level.INFO);
  
          assertEquals(julLevel, julLogger.getLevel());
      }
  
      // https://jira.qos.ch/browse/LOGBACK-1612
      @Test
      public void jonathan() {
          Level level = Level.INFO;
          Logger logger = loggerContext.getLogger("aaa");
          logger.setLevel(level);
  
          java.util.logging.Logger julLogger = JULHelper.asJULLogger(logger);
          java.util.logging.Level julLevel = JULHelper.asJULLevel(level);
  
          assertFalse(julLogger.isLoggable(java.util.logging.Level.CONFIG));
      }
  
      @Test
      public void julHelperAsJulLevelRejectsNull() {
          Exception e = assertThrows(IllegalArgumentException.class, () -> {
              JULHelper.asJULLevel(null);
          });
          assertEquals("Unexpected level [null]", e.getMessage());
      }
  
      @Test
      public void settingLevelToNullGetsParentLevel() {
          // first set level of "a" (the parent) to DEBUG
          Logger parent = loggerContext.getLogger("a");
          parent.setLevel(Level.DEBUG);
 
         // then set level of "a.b" (child logger of a) to null
         // for b to inherit its parent's level
         Logger child = loggerContext.getLogger("a.b");
         child.setLevel(Level.INFO);
         child.setLevel(null);
 
         assertEquals(parent.getEffectiveLevel(), child.getEffectiveLevel());
         assertEquals(Level.DEBUG, child.getEffectiveLevel());
     }
 }