start at -5: java.lang.ArrayIndexOutOfBoundsException: -5
start at -1: java.lang.ArrayIndexOutOfBoundsException: -1
start at limit: ok
start at limit-1: ok
first 10: ok
read all: ok
test huge len: ok
5 from 5: ok
20 from 5: ok
test len overflow: ok
start beyond limit: ok
read 0: ok
read -1: ok
invalid read 0: ok
invalid read -1: ok