Fix “bad CAA” unit tests on single-threaded Perl

Instantiation of a malformed CAA resource record is a guaranteed croak
if and only if the Perl in use is compiled with support for interpreter
threads (-DUSE_ITHREADS). If not, it won’t. So the unit test is modified
to try to convert the bad CAA record back to presentation form, so that
it does become a guaranteed croak.

1 files changed, 5 insertions, 2 deletions

diff --git a/t/rr.t b/t/rr.t
index f9f0403..f0850fd 100644
--- a/t/rr.t
+++ b/t/rr.t
@@ -228,8 +228,11 @@ subtest 'SPF' => sub {
 
 subtest 'croak when given malformed CAA records' => sub {
     my $will_croak = sub {
-        Zonemaster::LDNS::RR->new(
-            'bad-caa.example.       3600    IN      CAA     \# 4 C0000202' )
+        # This will croak if LDNS.xs is compiled with -DUSE_ITHREADS
+        my $bad_caa = Zonemaster::LDNS::RR->new(
+            'bad-caa.example.       3600    IN      CAA     \# 4 C0000202' );
+        # This will always croak
+        $bad_caa->string();
     };
     like( exception { $will_croak->() }, qr/^Failed to convert RR to string/ );
 };