package org.apache.maven.plugin.surefire;
   /*
    * 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.
   */
  
  
  import java.lang.reflect.Field;
  import org.apache.maven.toolchain.Toolchain;
  
  import junit.framework.TestCase;
  
  public class SurefirePluginTest
      extends TestCase
  {
  
      public void testForkMode()
          throws NoSuchFieldException, IllegalAccessException
      {
          SurefirePlugin surefirePlugin = new SurefirePlugin();
          setFieldValue( surefirePlugin, "toolchain", new MyToolChain() );
          setFieldValue( surefirePlugin, "forkMode", "never" );
          assertEquals( "once", surefirePlugin.getEffectiveForkMode() );
      }
  
      public void testForkCountComputation()
      {
          SurefirePlugin surefirePlugin = new SurefirePlugin();
          assertConversionFails( surefirePlugin, "nothing" );
  
          assertConversionFails( surefirePlugin, "5,0" );
          assertConversionFails( surefirePlugin, "5.0" );
          assertConversionFails( surefirePlugin, "5,0C" );
          assertConversionFails( surefirePlugin, "5.0CC" );
  
          assertForkCount( surefirePlugin, 5, "5" );
  
          int availableProcessors = Runtime.getRuntime().availableProcessors();
          assertForkCount( surefirePlugin, 3*availableProcessors, "3C" );
          assertForkCount( surefirePlugin, (int) ( 2.5*availableProcessors ), "2.5C" );
          assertForkCount( surefirePlugin, availableProcessors, "1.0001 C" );
          assertForkCount( surefirePlugin, 1, 1d / ( (double) availableProcessors + 1 ) + "C" );
          assertForkCount( surefirePlugin, 0, "0 C" );
      }
  
      private void assertForkCount( SurefirePlugin surefirePlugin, int expected, String value )
      {
          assertEquals( expected, surefirePlugin.convertWithCoreCount( value ));
      }
  
      private void assertConversionFails( SurefirePlugin surefirePlugin, String value )
      {
          try {
              surefirePlugin.convertWithCoreCount( value );
          } catch (NumberFormatException nfe)
          {
              return;
          }
          fail( "Expected NumberFormatException when converting " + value );
      }
  
      private void setFieldValue( SurefirePlugin plugin, String fieldName, Object value )
          throws NoSuchFieldException, IllegalAccessException
      {
          Field field = findField( plugin.getClass(), fieldName );
          field.setAccessible( true );
          field.set( plugin, value );
  
      }
  
      private Field findField( Class clazz, String fieldName )
      {
          while ( clazz != null )
          {
              try
              {
                  return clazz.getDeclaredField( fieldName );
              }
              catch ( NoSuchFieldException e )
              {
                  clazz = clazz.getSuperclass();
              }
          }
          throw new IllegalArgumentException( "Field not found" );
      }
 
     private class MyToolChain
         implements Toolchain
     {
         @Override
         public String getType()
         {
             return null;
         }
 
         @Override
         public String findTool( String s )
         {
             return null;
         }
     }
 }