1run_tr ()
2{
3	echo -n "echo '$1' | tr '$2' '$3': "
4	echo "$1" | $bb tr "$2" "$3"
5	echo
6}
7tr_test ()
8{
9	run_tr "cbaab"		abc 		zyx
10	run_tr "TESTING A B C" 	'[A-Z]' 	'[a-z]'
11	run_tr "abc[]" 		"a[b" 		AXB
12	run_tr abc		'[:alpha:]' 	A-ZA-Z
13	run_tr abc56		'[:alnum:]' 	A-ZA-Zxxxxxxxxxx
14	run_tr 012		'[:digit:]' 	abcdefghi
15	run_tr abc56		'[:lower:]' 	'[:upper:]'
16	run_tr " 	"	'[:space:]' 	12345
17	run_tr " 	"	'[:blank:]' 	12
18	run_tr 'a b'		'[= =]' 	X
19	run_tr "[:"		'[:' 		ab
20	run_tr " 	.,:"	'[:punct:]'	12
21	run_tr " 	.,:"	'[:cntrl:]'	12
22}
23
24bb=        tr_test > logfile.gnu
25bb=busybox tr_test > logfile.bb
26diff -u logfile.gnu logfile.bb
27