Bug 147977 Chart editor does not use container's column bindings
1) create data source 2) create data set: select * from customers 3) create table 4) bind country, customer name to table 5) group by country 6) create a binding for total_by_country which aggregates # of customers in each country. put a data element in group footer and bind to total_by_country 7) in group header put chart 8) in data tab specify inherit from container Result: You see columns for report data set created in step 2. Expected Result: Just 3 columns for the 3 bindings created in 4 and 6.
data/org.eclipse.birt.data.tests/test/org/eclipse/birt/data/engine/binding/ColumnBindingTest.java
*/
	public void testBlankExpression( ) throws Exception
	{
		QueryDefinition queryDefn = newReportQuery( );
		
		String[] name = new String[]{
				"testColumn1"
		};
		ScriptExpression[] se = new ScriptExpression[name.length];
		se[0] = new ScriptExpression( null );
		
		for ( int i = 0; i < name.length; i++ )
			queryDefn.addResultSetExpression( name[i], se[i] );
		IResultIterator ri = executeQuery( queryDefn );
		if ( ri.next( ) )
		{
			try
			{
				ri.getValue( name[0] );
			}
			catch ( BirtException e )
			{
				assertTrue( e.getErrorCode( ) == ResourceConstants.INVALID_JS_EXPR );
			}
		}
	}
	
	
	
	private FileArchiveWriter archiveWriter;