package org.apache.maven.shared.utils.xml.pull;
   
   /*
    * 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.io.IOException;
  import java.io.StringReader;
  import org.apache.maven.shared.utils.xml.Xpp3Dom;
  import org.apache.maven.shared.utils.xml.Xpp3DomBuilder;
  
  import org.junit.Test;
  
  import static org.apache.maven.shared.utils.xml.Xpp3Dom.mergeXpp3Dom;
  import static org.junit.Assert.*;
  
  /**
   * @author Kristian Rosenvold
   */
  public class Xpp3DomTest
  {
  
      private Xpp3Dom createElement( String element, String value )
      {
          Xpp3Dom t1s1 = new Xpp3Dom( element );
          t1s1.setValue( value );
          return t1s1;
      }
  
  
      @Test
      public void mergePrecedenceSelfClosed()
          throws XmlPullParserException, IOException
      {
          Xpp3Dom parentConfig = build( "<configuration><items><item/></items></configuration>" );
          Xpp3Dom childConfig = build( "<configuration><items><item>ooopise</item></items></configuration>" );
  
          Xpp3Dom result = Xpp3Dom.mergeXpp3Dom( childConfig, parentConfig );
          Xpp3Dom items = result.getChild( "items" );
  
          assertEquals( 1, items.getChildCount() );
          Xpp3Dom item = items.getChild( 0 );
          assertEquals( "ooopise", item.getValue() );
      }
  
      @Test
      public void mergePrecedenceOpenClose()
          throws XmlPullParserException, IOException
      {
          Xpp3Dom parentConfig = build( "<configuration><items><item></item></items></configuration>" );
          Xpp3Dom childConfig = build( "<configuration><items><item>ooopise</item></items></configuration>" );
  
          Xpp3Dom result = Xpp3Dom.mergeXpp3Dom( childConfig, parentConfig );
          Xpp3Dom items = result.getChild( "items" );
  
          assertEquals( 1, items.getChildCount() );
          Xpp3Dom item = items.getChild( 0 );
          assertEquals( "ooopise", item.getValue() );
      }
  
      @Test
      public void selfOverrideOnRootNode()
      {
          // Todo: This does not work when loaded. Probably a bug related to null vs "" handling
          //      Xpp3Dom t1 = build( "<top combine.self='override' attr='value'></top>" );
  
          Xpp3Dom t1 = new Xpp3Dom( "top" );
          t1.setAttribute( "attr", "value" );
  
          t1.setAttribute( Xpp3Dom.SELF_COMBINATION_MODE_ATTRIBUTE, Xpp3Dom.SELF_COMBINATION_OVERRIDE );
  
          Xpp3Dom t2 = build( "<top attr2='value2'>val2</top>" );
          Xpp3Dom result = mergeXpp3Dom( t1, t2 );
  
          assertEquals( 2, result.getAttributeNames().length );
          assertNull( result.getValue() );
      }
  
      @Test
      public void mergeValuesOnRootNode()
      {
          Xpp3Dom t1 = build( "<root attr='value'/>" );
          Xpp3Dom t2 = build( "<root attr2='value2'>t2Val</root>" );
          Xpp3Dom result = mergeXpp3Dom( t1, t2 );
         assertEquals( 2, result.getAttributeNames().length );
         assertEquals( result.getValue(), t2.getValue() );
     }
 
     @Test
     public void mergeAttributesOnRootNode()
     {
         Xpp3Dom t1 = build( "<root combine.self='merge' attr='value'/>" );
         Xpp3Dom t2 = build( "<root attr2='value2'/>" );
 
         Xpp3Dom dom = mergeXpp3Dom( t1, t2 );
         assertEquals( 3, dom.getAttributeNames().length );
     }
 
     @Test
     public void combineAppend()
     {
         Xpp3Dom t1 = new Xpp3Dom( "root" );
         t1.setAttribute( Xpp3Dom.CHILDREN_COMBINATION_MODE_ATTRIBUTE, Xpp3Dom.CHILDREN_COMBINATION_APPEND );
         t1.addChild( createElement( "sub", "s1Value" ) );
 
         Xpp3Dom t2 = new Xpp3Dom( "root" );
         t2.addChild( createElement( "sub", "s1Value" ) );
 
         Xpp3Dom result = mergeXpp3Dom( t1, t2 );
 
         assertEquals( 2, result.getChildren( "sub" ).length );
     }
 
     @Test
     public void mergeOverride()
     {
         Xpp3Dom t1 = new Xpp3Dom( "root" );
         t1.setAttribute( Xpp3Dom.CHILDREN_COMBINATION_MODE_ATTRIBUTE, Xpp3Dom.CHILDREN_COMBINATION_APPEND );
         t1.addChild( createElement( "sub", "s1Value" ) );
 
         Xpp3Dom t2 = new Xpp3Dom( "root" );
         t2.addChild( createElement( "sub", "s1Value" ) );
 
         Xpp3Dom result = mergeXpp3Dom( t1, t2, Boolean.TRUE );
 
         assertEquals( 1, result.getChildren( "sub" ).length );
     }
 
 
     @Test( expected = NullPointerException.class )
     public void nullValue()
     {
         //noinspection ConstantConditions
         new Xpp3Dom( "top" ).setAttribute( null, "value" );
     }
 
     @Test( expected = NullPointerException.class )
     public void nullAttribute()
     {
         //noinspection ConstantConditions
         new Xpp3Dom( "root" ).setAttribute( "attr", null );
     }
 
 
     @Test
     public void testEquals()
     {
         Xpp3Dom dom = new Xpp3Dom( "single" );
         dom.addChild( new Xpp3Dom( "kid" ) );
 
         Xpp3Dom other = new Xpp3Dom( "single" );
         other.addChild( new Xpp3Dom( "kid2" ) );
 
         assertEquals( dom, dom );
         //noinspection ObjectEqualsNull
         assertFalse( dom.equals( null ) );
         assertFalse( dom.equals( new Xpp3Dom( (String) null ) ) );
         assertFalse( dom.equals( other ) );
     }
 
     @Test
     public void dominantWinsCollections()
         throws XmlPullParserException
     {
         Xpp3Dom parent = build( "<root><entries><entry>uno</entry><entry>dos</entry></entries></root>" );
         Xpp3Dom dominant = build( "<root><entries><entry>tres</entry></entries></root>" );
 
         Xpp3Dom result = mergeXpp3Dom( dominant, parent );
 
         Xpp3Dom items = result.getChild( "entries" );
         assertEquals( 1, items.getChildCount() );
 
         assertElemEquals( "tres", items.getChild( 0 ) );
     }
 
     @Test
     public void combineChildrenAppendTest()
         throws XmlPullParserException
     {
         Xpp3Dom parent =
             build( "<root><entries><entry>uno</entry><entry>dos</entry><entry>tres</entry></entries></root>" );
         Xpp3Dom child = build( "<root><entries combine.children=\"append\"><entry>quatro</entry></entries></root>" );
 
         Xpp3Dom result = mergeXpp3Dom( child, parent );
 
         Xpp3Dom items = result.getChild( "entries" );
         assertEquals( 4, items.getChildCount() );
 
         Xpp3Dom[] item = items.getChildren();
 
         assertElemEquals( "uno", item[0] );
         assertElemEquals( "dos", item[1] );
         assertElemEquals( "tres", item[2] );
         assertElemEquals( "quatro", item[3] );
     }
 
     @Test
     public void unchangedWithFirstOrLastEmpty()
         throws Exception
     {
         String configStr = "<root><entries><entry/><entry>test</entry><entry/></entries></root>";
         Xpp3Dom dominant = build( configStr );
         Xpp3Dom duplicatedDominant = build( configStr );
         validateEntries( dominant );
         Xpp3Dom result = mergeXpp3Dom( dominant, duplicatedDominant );
         validateEntries( result );
     }
 
     private void validateEntries( Xpp3Dom result )
     {
         Xpp3Dom entries = result.getChild( "entries" );
         assertEquals( 3, entries.getChildCount() );
         assertXpp3Null( entries.getChild( 0 ) );
         assertEquals( "test", entries.getChild( 1 ).getValue() );
         assertXpp3Null( entries.getChild( 2 ) );
     }
 
 
     static void assertElemEquals( String value, Xpp3Dom element )
     {
         assertEquals( value, element.getValue() );
     }
 
 
     void assertXpp3Null( Xpp3Dom entry )
     {
         // Todo: When we used xpp3dom, all methods using this assert used to return null
         assertEquals( "", entry.getValue() );
     }
 
     @Test
     public void recessiveChildrenIncludedWhenDominantEmpty()
         throws Exception
     {
         String dominant = "<root><baz>bazzy</baz></root>";
         String recessive = "<root><bar>barry</bar></root>";
 
         Xpp3Dom merged = mergeXpp3Dom( build( dominant ), build( recessive ) );
 
         assertEquals( 2, merged.getChildCount() );
         assertEquals( "bazzy", merged.getChild( "baz" ).getValue() );
         assertEquals( "barry", merged.getChild( "bar" ).getValue() );
     }
 
     static Xpp3Dom build( String stringContent )
     {
         return Xpp3DomBuilder.build( new StringReader( stringContent ) );
     }
 
     @Test
     public void duplicatedChildren()
         throws IOException, XmlPullParserException
     {
         String dupes = "<root><baz>x</baz><baz>y</baz></root>";
         assertEquals( "y", build( dupes ).getChild( "baz" ).getValue() );
     }
 
 }