Bug 183918 get relative file path of linkage library
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/library/DesignLoadLibraryTest.java
assertEquals( "LibA.lighterBlue", color.getQualifiedName( ) ); 
		assertTrue( color.getModule( ) instanceof Library );
		assertFalse( iter.hasNext( ) );
		iter = designHandle.customColorsIterator( );
		assertEquals( structure.getStructure( ), ( (StructureHandle) iter
				.next( ) ).getStructure( ) );
		propHandle = libAHandle.getPropertyHandle( Module.COLOR_PALETTE_PROP );
		structure = propHandle.getAt( 0 );
		assertEquals( structure.getStructure( ), ( (StructureHandle) iter
				.next( ) ).getStructure( ) );
	}
	/**
	 * Test the reference to one custom color.
	 * 
	 * @throws Exception
	 *             if any exception
	 */
	public void testCustomColorReference( ) throws Exception
	{
		openDesign( "DesignWithElementReferenceLibrary.xml" ); 
		LabelHandle label = (LabelHandle) designHandle.findElement( "label3" ); 
		assertEquals( 222, label.getPrivateStyle( ).getColor( ).getRGB( ) );
		assertEquals( 333, label.getPrivateStyle( ).getBackgroundColor( )
				.getRGB( ) );
		label.getPrivateStyle( ).getColor( ).setStringValue( "LibA.lighterRed" ); 
		assertEquals( 111, label.getPrivateStyle( ).getColor( ).getRGB( ) );
		label.getPrivateStyle( ).getColor( ).setStringValue( "lighterRed" ); 
		assertEquals( 333, label.getPrivateStyle( ).getColor( ).getRGB( ) );
		
		designHandle.getCommandStack( ).undo( );