=> test #0 :
factory[log4c_category_factory]:
{ name:'root' priority:NOTICE additive:1 appender:'(nil)' parent:'(nil)' }
{ name:'sub1' priority:ERROR additive:1 appender:'appender1' parent:'root' }

factory[log4c_appender_factory]:
{ name:'stderr' type:'stream' layout:'basic' isopen:0 udata:0x111111111111}
{ name:'stdout' type:'stream' layout:'basic' isopen:0 udata:0x111111111111}
{ name:'appender1' type:'stream' layout:'layout1' isopen:0 udata:0x111111111111}

factory[log4c_layout_factory]:
{ name:'layout1' type:'basic_r' udata:(nil) }
{ name:'basic' type:'basic' udata:(nil) }
{ name:'dated' type:'dated' udata:(nil) }

=> test #0 :  passed
=> test #1 :
[appender1] ERROR    sub1 - let's log
=> test #1 :  passed
=> test #2 :
[appender1] ERROR    sub1 - let's log a ...=> test #2 :  passed
=> test #3 :
=> test #3 :  passed