uni/fold.t: Prevent [] from being optimized out

This test hasn't been testing bracketed char classes because a single
character class gets optimized out.

1 files changed, 5 insertions, 4 deletions

diff --git a/t/uni/fold.t b/t/uni/fold.t
index f6f467cc9c..0f71c803b6 100644
--- a/t/uni/fold.t
+++ b/t/uni/fold.t
@@ -38,12 +38,13 @@ if (open(CF, $CF)) {
 	my $b = pack("U0U*", map { hex } split " ", $mapping);
 	my $t0 = ":$a:" =~ /:$a:/    ? 1 : 0;
 	my $t1 = ":$a:" =~ /:$a:/i   ? 1 : 0;
-	my $t2 = ":$a:" =~ /:[$a]:/  ? 1 : 0;
-	my $t3 = ":$a:" =~ /:[$a]:/i ? 1 : 0;
+	my $t2 = ":$a:" =~ /:[_$a]:/  ? 1 : 0; # Two chars in [] so doesn't get
+                                               # optimized to a non-charclass
+	my $t3 = ":$a:" =~ /:[_$a]:/i ? 1 : 0;
 	my $t4 = ":$a:" =~ /:$b:/i   ? 1 : 0;
-	my $t5 = ":$a:" =~ /:[$b]:/i ? 1 : 0;
+	my $t5 = ":$a:" =~ /:[_$b]:/i ? 1 : 0;
 	my $t6 = ":$b:" =~ /:$a:/i   ? 1 : 0;
-	my $t7 = ":$b:" =~ /:[$a]:/i ? 1 : 0;
+	my $t7 = ":$b:" =~ /:[_$a]:/i ? 1 : 0;
 	print $t0 && $t1 && $t2 && $t3 && $t4 && $t5 && $t6 && $t7 ?
 	    "ok $i \# - $code - $name - $mapping - $status\n" :
 	    "not ok $i \# - $code - $name - $mapping - $status - $t0 $t1 $t2 $t3 $t4 $t5 $t6 $t7\n";