--TEST-- basic stream filter tests --FILE-- --EXPECT-- filter: string.rot13 bool(true) string(12) "Uryyb Gurer!" filter: string.toupper bool(true) string(12) "HELLO THERE!" filter: string.tolower bool(true) string(12) "hello there!" filter: string.rot13 bool(true) filter: string.toupper bool(true) string(12) "URYYB GURER!"