{
ErrorHandler eh = (ErrorHandler) newMock(ErrorHandler.class);
Location l = newLocation();
MockControl control = newControl(SymbolSource.class);
SymbolSource source = (SymbolSource) control.getMock();
// Training
source.valueForSymbol("symbol");
control.setReturnValue(null);
eh.error(
LogFactory.getLog(SymbolExpander.class),
ImplMessages.noSuchSymbol("symbol"),