
PASS lang("en"): <root><match xml:lang="en"/></root> 
PASS lang("en"): <root><match xml:lang="EN"/></root> 
PASS lang("en"): <root><match xml:lang="en-us"/></root> 
PASS lang("en"): <root><unmatch/></root> 
PASS lang("ja"): <root xml:lang="ja"><match/></root> 
PASS lang("ja"): <root xml:lang="ja-jp"><unmatch xml:lang="ja_JP"/></root> 
FAIL lang("ko"): <root><match xml:lang="Ko"/></root> assert_equals: <match xml:lang="Ko"/> expected true but got false