Bug 176450 Support link to CSS Feature(Model Part)
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/parser/ReportDesignParseTest.java
openDesign( fileName, ULocale.ENGLISH );
		ConfigVariable configVar = new ConfigVariable( );
		configVar.setName( "VarToAdd" ); 
		configVar.setValue( "ValueToAdd" ); 
		ConfigVariable newConfigVar = new ConfigVariable( );
		newConfigVar.setName( "VarToReplace" ); 
		newConfigVar.setValue( "ValueToReplace" ); 
		ConfigVariable var = null;
		
		designHandle.addConfigVariable( configVar );
		var = designHandle.findConfigVariable( "VarToAdd" ); 
		assertNotNull( var );
		assertEquals( "ValueToAdd", var.getValue( ) ); 
		
		designHandle.replaceConfigVariable( configVar, newConfigVar );
		var = designHandle.findConfigVariable( "VarToAdd" ); 
		assertNull( var );
		var = designHandle.findConfigVariable( "VarToReplace" ); 
		assertNotNull( var );
		assertEquals( "ValueToReplace", var.getValue( ) ); 
		
		designHandle.dropConfigVariable( "VarToReplace" ); 
		var = designHandle.findConfigVariable( "ValueToReplace" ); 
		assertNull( var );
		
		try
		{
			configVar = new ConfigVariable( );
			configVar.setName( "   " ); 
			configVar.setValue( "value" );