package org.apache.archiva.redback.components.evaluator.sources;
   
   /*
    * 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 junit.framework.TestCase;
  import org.apache.archiva.redback.components.evaluator.DefaultExpressionEvaluator;
  import org.apache.archiva.redback.components.evaluator.EvaluatorException;
  import org.apache.archiva.redback.components.evaluator.sources.PropertiesExpressionSource;
  import org.apache.archiva.redback.components.evaluator.sources.SystemPropertyExpressionSource;
  import org.apache.archiva.redback.components.evaluator.ExpressionEvaluator;
  
  import java.util.Properties;
  
  /**
   * DefaultExpressionEvaluatorTest
   *
   * @author <a href="mailto:joakim@erdfelt.com">Joakim Erdfelt</a>
   *
   */
  public class DefaultExpressionEvaluatorTest
      extends TestCase
  {
      private ExpressionEvaluator evaluator;
  
      protected void setUp()
          throws Exception
      {
          super.setUp();
  
          evaluator = new DefaultExpressionEvaluator();
      }
  
      public void testSimple()
          throws EvaluatorException
      {
          Properties props = new Properties();
          props.setProperty( "fruit", "apple" );
  
          PropertiesExpressionSource propsSource = new PropertiesExpressionSource();
          propsSource.setProperties( props );
          evaluator.addExpressionSource( propsSource );
  
          String expression = "${fruit}";
          String expected = "apple";
  
          String actual = evaluator.expand( expression );
          assertEquals( expected, actual );
      }
  
      public void testSimpleStartOfLine()
          throws EvaluatorException
      {
          Properties props = new Properties();
          props.setProperty( "fruit", "apple" );
  
          PropertiesExpressionSource propsSource = new PropertiesExpressionSource();
          propsSource.setProperties( props );
          evaluator.addExpressionSource( propsSource );
  
          String expression = "${fruit} is good for you.";
          String expected = "apple is good for you.";
  
          String actual = evaluator.expand( expression );
          assertEquals( expected, actual );
      }
  
      public void testSimpleEndOfLine()
          throws EvaluatorException
      {
          Properties props = new Properties();
          props.setProperty( "fruit", "apple" );
  
          PropertiesExpressionSource propsSource = new PropertiesExpressionSource();
          propsSource.setProperties( props );
          evaluator.addExpressionSource( propsSource );
  
          String expression = "watch out for the worm in the ${fruit}";
          String expected = "watch out for the worm in the apple";
  
          String actual = evaluator.expand( expression );
          assertEquals( expected, actual );
      }
 
     public void testSimpleSystemProperty()
         throws EvaluatorException
     {
         evaluator.addExpressionSource( new SystemPropertyExpressionSource() );
 
         String userHome = System.getProperty( "user.home" );
         String expression = "My HOME directory is ${user.home}";
         String expected = "My HOME directory is " + userHome;
 
         String actual = evaluator.expand( expression );
         assertEquals( expected, actual );
     }
 
     public void testMultiExpression()
         throws EvaluatorException
     {
         evaluator.addExpressionSource( new SystemPropertyExpressionSource() );
 
         String userName = System.getProperty( "user.name" );
         String userHome = System.getProperty( "user.home" );
         String expression = "${user.name}'s home directory is ${user.home}";
         String expected = userName + "'s home directory is " + userHome;
 
         String actual = evaluator.expand( expression );
         assertEquals( expected, actual );
     }
 
     /**
      * This use case was discovered by a user of archiva.
      * The last expression doesn't get evaluated properly.
      * <p/>
      * The result (with the bug) was "2.0.4${prj.ver.suf}"
      */
     public void testMultiExpressionVersionBug()
         throws EvaluatorException
     {
         Properties props = new Properties();
         props.setProperty( "prj.ver.maj", "2" );
         props.setProperty( "prj.ver.min", "0" );
         props.setProperty( "prj.ver.inc", "4" );
         props.setProperty( "prj.ver.suf", "-SNAPSHOT" );
 
         PropertiesExpressionSource propsSource = new PropertiesExpressionSource();
         propsSource.setProperties( props );
         evaluator.addExpressionSource( propsSource );
 
         String expression = "${prj.ver.maj}.${prj.ver.min}.${prj.ver.inc}${prj.ver.suf}";
         String expected = "2.0.4-SNAPSHOT";
 
         String actual = evaluator.expand( expression );
         assertEquals( expected, actual );
     }
 
     public void testEscaping()
         throws EvaluatorException
     {
         evaluator.addExpressionSource( new SystemPropertyExpressionSource() );
 
         String userName = System.getProperty( "user.name" );
         String userHome = System.getProperty( "user.home" );
         String expression = "${user.name}'s home directory is ${user.home} (fetched via $${user.home} expression)";
         String expected = userName + "'s home directory is " + userHome + " (fetched via ${user.home} expression)";
 
         String actual = evaluator.expand( expression );
         assertEquals( expected, actual );
     }
 
     public void testRecursiveSimple()
         throws EvaluatorException
     {
         PropertiesExpressionSource propsource = new PropertiesExpressionSource();
         Properties props = new Properties();
 
         // Create intentional recursive lookup.
         props.setProperty( "main.dir", "${target.dir}/classes" );
         props.setProperty( "target.dir", "./target" );
 
         propsource.setProperties( props );
 
         evaluator.addExpressionSource( propsource );
         evaluator.addExpressionSource( new SystemPropertyExpressionSource() );
 
         String expression = "My classes directory is ${main.dir}";
         String expected = "My classes directory is ./target/classes";
 
         String actual = evaluator.expand( expression );
         assertEquals( expected, actual );
     }
 
     public void testRecursiveCycle()
     {
         PropertiesExpressionSource propsource = new PropertiesExpressionSource();
         Properties props = new Properties();
 
         // Create intentional recursive lookup.
         props.setProperty( "main.dir", "${test.dir}/target/classes" );
         props.setProperty( "test.dir", "${main.dir}/target/test-classes" );
 
         propsource.setProperties( props );
 
         evaluator.addExpressionSource( propsource );
         evaluator.addExpressionSource( new SystemPropertyExpressionSource() );
 
         try
         {
             evaluator.expand( "My main dir is ${main.dir}" );
             fail( "Should have thrown an EvaluatorException due to recursive cycle." );
         }
         catch ( EvaluatorException e )
         {
             // Expected path.
         }
     }
 }