Add testcase

tests/by-util/test_tr.rs

@@ -1374,3 +1374,23 @@ fn check_disallow_blank_in_set2_when_translating() {
 fn check_class_in_set2_must_be_matched_in_set1() {
  new_ucmd!().args(&["-t", "1[:upper:]", "[:upper:]"]).fails();
 }
+
+#[test]
+fn check_complement_2_unique_in_set2() {
+ let x226 = "x".repeat(226);
+
+ // [y*] is expanded tp "y" here
+ let arg = x226 + "[y*]xxx";
+ new_ucmd!().args(&["-c", "[:upper:]", arg.as_str()]).fails();
+}
+
+#[test]
+fn check_complement_1_unique_in_set2() {
+ let x226 = "x".repeat(226);
+
+ // [y*] is expanded to "" here
+ let arg = x226 + "[y*]xxxx";
+ new_ucmd!()
+ .args(&["-c", "[:upper:]", arg.as_str()])
+ .succeeds();
+}