1 files changed, 45 insertions, 0 deletions
diff --git a/dist/Data-Dumper/t/recurse.t b/dist/Data-Dumper/t/recurse.t
new file mode 100644
index 0000000000..275a89d236
--- /dev/null
+++ b/dist/Data-Dumper/t/recurse.t
@@ -0,0 +1,45 @@
+#!perl
+
+# Test the Maxrecurse option
+
+use strict;
+use Test::More tests => 32;
+use Data::Dumper;
+
+SKIP: {
+    skip "no XS available", 16
+      if $Data::Dumper::Useperl;
+    local $Data::Dumper::Useperl = 1;
+    test_recursion();
+}
+
+test_recursion();
+
+sub test_recursion {
+    my $pp = $Data::Dumper::Useperl ? "pure perl" : "XS";
+    $Data::Dumper::Purity = 1; # make sure this has no effect
+    $Data::Dumper::Indent = 0;
+    $Data::Dumper::Maxrecurse = 1;
+    is(eval { Dumper([]) }, '$VAR1 = [];', "$pp: maxrecurse 1, []");
+    is(eval { Dumper([[]]) }, undef, "$pp: maxrecurse 1, [[]]");
+    ok($@, "exception thrown");
+    is(eval { Dumper({}) }, '$VAR1 = {};', "$pp: maxrecurse 1, {}");
+    is(eval { Dumper({ a => 1 }) }, q($VAR1 = {'a' => 1};),
+       "$pp: maxrecurse 1, { a => 1 }");
+    is(eval { Dumper({ a => {} }) }, undef, "$pp: maxrecurse 1, { a => {} }");
+    ok($@, "exception thrown");
+    is(eval { Dumper(\1) }, "\$VAR1 = \\1;", "$pp: maxrecurse 1, \\1");
+    is(eval { Dumper(\\1) }, undef, "$pp: maxrecurse 1, \\1");
+    ok($@, "exception thrown");
+    $Data::Dumper::Maxrecurse = 3;
+    is(eval { Dumper(\1) }, "\$VAR1 = \\1;", "$pp: maxrecurse 3, \\1");
+    is(eval { Dumper(\(my $s = {})) }, "\$VAR1 = \\{};", "$pp: maxrecurse 3, \\{}");
+    is(eval { Dumper(\(my $s = { a => [] })) }, "\$VAR1 = \\{'a' => []};",
+       "$pp: maxrecurse 3, \\{ a => [] }");
+    is(eval { Dumper(\(my $s = { a => [{}] })) }, undef,
+       "$pp: maxrecurse 3, \\{ a => [{}] }");
+    ok($@, "exception thrown");
+    $Data::Dumper::Maxrecurse = 0;
+    is(eval { Dumper([[[[[]]]]]) }, q($VAR1 = [[[[[]]]]];),
+       "$pp: check Maxrecurse doesn't set limit to 0 recursion");
+}