Since you haven't said where the problem actually lies for you the specification is incomplete. Maybe a read of How to ask better questions using Test::More and sample data will help with that. However, it is pretty trivial to avoid the dotstar in this case.
#!/usr/bin/env perl
use strict;
use warnings;
use Test::More;
my @good = (
'Fruits{ Apple Mango Grape Watermelon }',
'Fruit{ Apple }'
);
my @bad = (
'who',
'knows{ what }',
'you expect here'
);
my $re = qr/^Fruits?{ [A-Za-z ]* }$/;
plan tests => @good + @bad;
for my $str (@good) {
like ($str, $re, "$str matched");
}
for my $str (@bad) {
unlike ($str, $re, "$str not matched");
}
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