/**
    * 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.pattern;
  
  import ch.qos.logback.classic.Level;
  import ch.qos.logback.classic.Logger;
  import ch.qos.logback.classic.LoggerContext;
  import ch.qos.logback.classic.PatternLayout;
  import ch.qos.logback.classic.spi.ILoggingEvent;
  import ch.qos.logback.classic.spi.LoggingEvent;
  import ch.qos.logback.core.util.EnvUtil;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import java.io.PrintWriter;
  import java.io.StringWriter;
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import static org.assertj.core.api.Assertions.assertThat;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class ExtendedThrowableProxyConverterTest {
  
      LoggerContext lc = new LoggerContext();
      ExtendedThrowableProxyConverter etpc = new ExtendedThrowableProxyConverter();
      StringWriter sw = new StringWriter();
      PrintWriter pw = new PrintWriter(sw);
  
      @BeforeEach
      public void setUp() throws Exception {
          lc.setPackagingDataEnabled(true);
          etpc.setContext(lc);
          etpc.start();
      }
  
      @AfterEach
      public void tearDown() throws Exception {
      }
  
      private ILoggingEvent createLoggingEvent(Throwable t) {
          return new LoggingEvent(this.getClass().getName(), lc.getLogger(Logger.ROOT_LOGGER_NAME), Level.DEBUG,
                  "test message", t, null);
      }
  
      @Test
      public void integration() {
          PatternLayout pl = new PatternLayout();
          pl.setContext(lc);
          pl.setPattern("%m%n%xEx");
          pl.start();
          ILoggingEvent e = createLoggingEvent(new Exception("x"));
          String res = pl.doLayout(e);
  
          // make sure that at least some package data was output
          Pattern p = Pattern.compile("\\s*at .*?\\[.*?\\]");
          Matcher m = p.matcher(res);
          int i = 0;
          while (m.find()) {
              i++;
          }
          assertThat(i).isGreaterThan(5);
      }
  
      @Test
      public void smoke() {
          Exception t = new Exception("smoke");
          verify(t);
      }
  
      @Test
      public void nested() {
          Throwable t = makeNestedException(1);
          verify(t);
      }
  
      @Test
      public void cyclicCause() {
          // the identical formatting check, see verify(e) call below, fails
          // under JDK 11. this does not mean that the presently tested code is wrong
          // but that JDK 11 formats things differently
          if (!EnvUtil.isJDK16OrHigher())
              return;
  
          Exception e = new Exception("foo");
          Exception e2 = new Exception(e);
          e.initCause(e2);
         verify(e);
     }
 
     @Test
     public void cyclicSuppressed() {
         // the identical formatting check, see verify(e) call below, fails
         // under JDK 11. this does not mean that the presently tested code is wrong
         // but that JDK 11 formats things differently
         if (!EnvUtil.isJDK16OrHigher())
             return;
 
         Exception e = new Exception("foo");
         Exception e2 = new Exception(e);
         e.addSuppressed(e2);
         verify(e);
     }
 
     void verify(Throwable t) {
         t.printStackTrace(pw);
 
         ILoggingEvent le = createLoggingEvent(t);
         String result = etpc.convert(le);
         result = result.replace("common frames omitted", "more");
         // replace ~[something:other] with "" but not if it contains "CIRCULAR"
         result = result.replaceAll(" ~?\\[(?!CIRCULAR).*\\]", "");
         assertEquals(sw.toString(), result);
     }
 
     Throwable makeNestedException(int level) {
         if (level == 0) {
             return new Exception("nesting level=" + level);
         }
         Throwable cause = makeNestedException(level - 1);
         return new Exception("nesting level =" + level, cause);
     }
 }