validators: ensure alpha routing number check digit is invalid
A user had masked the routing number in a bug report today, so we
should make sure that routing number check digit is always invalid.
@@ -30,6 +30,7 @@ func TestValidators__checkDigit(t *testing.T) {
"1a8ab": -1,
"0730002a": -1,
"0730A002": -1,
+ "YYYYYYYYY": -1, // users often mask ABA numbers
// valid
"07300022": 8, // Wells Fargo - Iowa
"10200007": 6, // Wells Fargo - Colorado
