1 files changed, 34 insertions, 0 deletions
diff --git a/t/deep-recursion.t b/t/deep-recursion.t
new file mode 100644
index 0000000..9861c0a
--- /dev/null
+++ b/t/deep-recursion.t
@@ -0,0 +1,34 @@
+#!/usr/bin/perl -w
+
+use strict;
+use warnings;
+# use diagnostics;
+
+use Data::Compare;
+use Test::More tests => 3;
+
+my $warning= '';
+$SIG{__WARN__} = sub { $warning= shift; };
+
+my($data1, $data2) = ({}, {});
+foreach my $i (qw(a b c d e f g h i j)) {
+    foreach my $j (qw(k l m n o p q r s t)) {
+        $data1->{$i}->{$j} = 'i like pie';
+        $data2->{$i}->{$j} = 'i like pie';
+    }
+}
+
+# check that we DTRT on very deep recursion
+$a = [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[0]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]];
+$b = [[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[0]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]];
+Compare($a, $b);
+ok($warning, "warn on deep recursion");
+$warning = '';
+
+Compare([5], [5]) foreach(1..1000);
+ok(!$warning, "recursion counter correctly reset");
+
+
+Compare($data1, $data2);
+
+ok(!$warning, "no warnings emitted on large flat structures");