/**
    * 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.spi;
  
  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.lang.reflect.InvocationTargetException;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  
  public class ThrowableProxyTest {
  
      StringWriter sw = new StringWriter();
      PrintWriter pw = new PrintWriter(sw);
  
      @BeforeEach
      public void setUp() throws Exception {
      }
  
      @AfterEach
      public void tearDown() throws Exception {
      }
  
      // compares Throwable.printStackTrace with output by ThrowableProxy
      public void verify(Throwable t) {
          t.printStackTrace(pw);
  
          IThrowableProxy tp = new ThrowableProxy(t);
  
          String result = ThrowableProxyUtil.asString(tp);
          result = result.replace("common frames omitted", "more");
          String expected = sw.toString();
  
          // System.out.println("========expected");
          // System.out.println(expected);
  
          // System.out.println("========result");
          // System.out.println(result);
  
          assertEquals(expected, result);
      }
  
      @Test
      public void smoke() {
          Exception e = new Exception("smoke");
          verify(e);
      }
  
      @Test
      public void nested() {
          Exception w = null;
          try {
              someMethod();
          } catch (Exception e) {
              w = new Exception("wrapping", e);
          }
          verify(w);
      }
  
      @Test
      public void suppressed() throws InvocationTargetException, IllegalAccessException {
          Exception ex = null;
          try {
              someMethod();
          } catch (Exception e) {
              Exception fooException = new Exception("Foo");
              Exception barException = new Exception("Bar");
              e.addSuppressed(fooException);
              e.addSuppressed(barException);
  
              ex = e;
          }
          verify(ex);
      }
  
      @Test
      public void suppressedWithCause() throws InvocationTargetException, IllegalAccessException {
          // sense.
          Exception ex = null;
          try {
              someMethod();
          } catch (Exception e) {
              ex = new Exception("Wrapper", e);
             Exception fooException = new Exception("Foo");
             Exception barException = new Exception("Bar");
 
             ex.addSuppressed(fooException);
             e.addSuppressed(barException);
 
         }
         verify(ex);
     }
 
     @Test
     public void suppressedWithSuppressed() throws Exception {
         Exception ex = null;
         try {
             someMethod();
         } catch (Exception e) {
             ex = new Exception("Wrapper", e);
             Exception fooException = new Exception("Foo");
             Exception barException = new Exception("Bar");
             barException.addSuppressed(fooException);
             e.addSuppressed(barException);
 
         }
         verify(ex);
     }
 
     // see also https://jira.qos.ch/browse/LOGBACK-453
     @Test
     public void nullSTE() {
         Throwable t = new Exception("someMethodWithNullException") {
             private static final long serialVersionUID = 1L;
 
             @Override
             public StackTraceElement[] getStackTrace() {
                 return null;
             }
         };
         // we can't test output as Throwable.printStackTrace method uses
         // the private getOurStackTrace method instead of getStackTrace
 
         // tests ThrowableProxyUtil.steArrayToStepArray
         new ThrowableProxy(t);
 
         // tests ThrowableProxyUtil.findNumberOfCommonFrames
         Exception top = new Exception("top", t);
         new ThrowableProxy(top);
     }
 
     @Test
     public void multiNested() {
         Exception w = null;
         try {
             someOtherMethod();
         } catch (Exception e) {
             w = new Exception("wrapping", e);
         }
         verify(w);
     }
 
     // see also https://jira.qos.ch/browse/LOGBACK-1454
     @Test
     public void cyclicCause() {
         // Earlier JDKs may format things differently
         if (!EnvUtil.isJDK16OrHigher())
             return;
         Exception e = new Exception("foo");
         Exception e2 = new Exception(e);
         e.initCause(e2);
         verify(e);
     }
 
     // see also https://jira.qos.ch/browse/LOGBACK-1454
     @Test
     public void cyclicSuppressed() {
         // Earlier JDKs may format things differently
         if (!EnvUtil.isJDK16OrHigher())
             return;
         Exception e = new Exception("foo");
         Exception e2 = new Exception(e);
         e.addSuppressed(e2);
         verify(e);
     }
 
     void someMethod() throws Exception {
         throw new Exception("someMethod");
     }
 
     void someMethodWithNullException() throws Exception {
         throw new Exception("someMethodWithNullException") {
             private static final long serialVersionUID = -2419053636101615373L;
 
             @Override
             public StackTraceElement[] getStackTrace() {
                 return null;
             }
         };
     }
 
     void someOtherMethod() throws Exception {
         try {
             someMethod();
         } catch (Exception e) {
             throw new Exception("someOtherMethod", e);
         }
     }
 }