Bug 168026 Still use the existing data binding even though the aggregate is different
I had a table in which a data binding which aggregates on a group. When I insert a new data item in the report, although the expressions are same, it aggregates on All, then it refered to the existing data binding. The expected behavior would be a new data binding is created with different aggregates.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/api/ReportItemHandleTest.java
public void testWriteVisibilityRules( ) throws Exception
	{
		openDesign( "ReportItemHandleTest.xml" ); 
		LabelHandle labelHandle = (LabelHandle) designHandle
				.findElement( "bodyLabel" ); 		
		Iterator rules = labelHandle.visibilityRulesIterator( );
		
		StructureHandle structHandle = (StructureHandle) rules.next( );
		assertNotNull( structHandle );
		MemberHandle memberHandle = structHandle
				.getMember( HideRule.FORMAT_MEMBER );
		memberHandle.setValue( DesignChoiceConstants.FORMAT_TYPE_REPORTLET );
		
		try
		{
			memberHandle.setValue( "noformat" ); 
		}
		catch ( PropertyValueException e )
		{
			assertEquals(
					PropertyValueException.DESIGN_EXCEPTION_CHOICE_NOT_FOUND, e
							.getErrorCode( ) );
		}
		memberHandle = structHandle.getMember( HideRule.VALUE_EXPR_MEMBER );
		memberHandle.setValue( "10*20" ); 
		DataItemHandle dataHandle = (DataItemHandle) designHandle
				.findElement( "bodyData" ); 		
		rules = dataHandle.visibilityRulesIterator( );
		
		structHandle = (StructureHandle) rules.next( );