/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you under the Apache License, Version 2.0 (the
    * "License"); you may not use this file except in compliance
    * with the License.  You may obtain a copy of the License at
    *
   *   http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing,
   * software distributed under the License is distributed on an
   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
   * KIND, either express or implied.  See the License for the
   * specific language governing permissions and limitations
   * under the License.
   */
  package org.apache.maven.exception;
  
  import java.io.IOException;
  import java.net.ConnectException;
  import java.util.concurrent.atomic.AtomicReference;
  
  import org.apache.maven.model.Plugin;
  import org.apache.maven.plugin.MojoExecution;
  import org.apache.maven.plugin.MojoExecutionException;
  import org.apache.maven.plugin.PluginContainerException;
  import org.apache.maven.plugin.PluginExecutionException;
  import org.apache.maven.plugin.descriptor.MojoDescriptor;
  import org.apache.maven.plugin.descriptor.PluginDescriptor;
  import org.junit.Test;
  
  import static org.junit.Assert.assertEquals;
  
  /**
   * @author <a href="mailto:baerrach@apache.org">Barrie Treloar</a>
   */
  public class DefaultExceptionHandlerTest {
      /**
       * Running Maven under JDK7 may cause connection issues because IPv6 is used by default.
       * <p>
       * e.g running mvn site:run will cause Jetty to fail.
       * </p>
       * <p>
       * The resolution is to add -Djava.net.preferIPv4Stack=true to the command line as documented in
       * http://cwiki.apache.org/confluence/display/MAVEN/ConnectException
       * </p>
       */
      @Test
      public void testJdk7ipv6() {
          ConnectException connEx = new ConnectException("Connection refused: connect");
          IOException ioEx = new IOException("Unable to establish loopback connection", connEx);
          MojoExecutionException mojoEx =
                  new MojoExecutionException("Error executing Jetty: Unable to establish loopback connection", ioEx);
  
          ExceptionHandler exceptionHandler = new DefaultExceptionHandler();
          ExceptionSummary exceptionSummary = exceptionHandler.handleException(mojoEx);
  
          String expectedReference = "http://cwiki.apache.org/confluence/display/MAVEN/ConnectException";
          assertEquals(expectedReference, exceptionSummary.getReference());
      }
  
      @Test
      public void testHandleExceptionAetherClassNotFound() {
          Throwable cause2 = new NoClassDefFoundError("org/sonatype/aether/RepositorySystem");
          Plugin plugin = new Plugin();
          Exception cause = new PluginContainerException(plugin, null, null, cause2);
          PluginDescriptor pluginDescriptor = new PluginDescriptor();
          MojoDescriptor mojoDescriptor = new MojoDescriptor();
          mojoDescriptor.setPluginDescriptor(pluginDescriptor);
          MojoExecution mojoExecution = new MojoExecution(mojoDescriptor);
          Throwable exception = new PluginExecutionException(mojoExecution, null, cause);
  
          DefaultExceptionHandler handler = new DefaultExceptionHandler();
          ExceptionSummary summary = handler.handleException(exception);
  
          String expectedReference = "http://cwiki.apache.org/confluence/display/MAVEN/AetherClassNotFound";
          assertEquals(expectedReference, summary.getReference());
      }
  
      @Test
      public void testHandleExceptionNoClassDefFoundErrorNull() {
          Throwable cause2 = new NoClassDefFoundError();
          Plugin plugin = new Plugin();
          Exception cause = new PluginContainerException(plugin, null, null, cause2);
          PluginDescriptor pluginDescriptor = new PluginDescriptor();
          MojoDescriptor mojoDescriptor = new MojoDescriptor();
          mojoDescriptor.setPluginDescriptor(pluginDescriptor);
          MojoExecution mojoExecution = new MojoExecution(mojoDescriptor);
          Throwable exception = new PluginExecutionException(mojoExecution, null, cause);
  
          DefaultExceptionHandler handler = new DefaultExceptionHandler();
          ExceptionSummary summary = handler.handleException(exception);
  
          String expectedReference = "http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException";
          assertEquals(expectedReference, summary.getReference());
      }
  
     @Test
     public void testHandleExceptionLoopInCause() {
         // Some broken exception that does return "this" as getCause
         AtomicReference<Throwable> causeRef = new AtomicReference<>(null);
         Exception cause2 = new RuntimeException("loop") {
             @Override
             public synchronized Throwable getCause() {
                 return causeRef.get();
             }
         };
         causeRef.set(cause2);
 
         Plugin plugin = new Plugin();
         Exception cause = new PluginContainerException(plugin, null, null, cause2);
         cause2.initCause(cause);
         PluginDescriptor pluginDescriptor = new PluginDescriptor();
         MojoDescriptor mojoDescriptor = new MojoDescriptor();
         mojoDescriptor.setPluginDescriptor(pluginDescriptor);
         MojoExecution mojoExecution = new MojoExecution(mojoDescriptor);
         Throwable exception = new PluginExecutionException(mojoExecution, null, cause);
 
         DefaultExceptionHandler handler = new DefaultExceptionHandler();
         ExceptionSummary summary = handler.handleException(exception);
 
         String expectedReference = "http://cwiki.apache.org/confluence/display/MAVEN/PluginContainerException";
         assertEquals(expectedReference, summary.getReference());
     }
 }