Add JSON.pm to third_party

third_party/JSON/JSON-2.59/t/16_tied.t

Index: third_party/JSON/JSON-2.59/t/16_tied.t
diff --git a/third_party/JSON/JSON-2.59/t/16_tied.t b/third_party/JSON/JSON-2.59/t/16_tied.t
new file mode 100644
index 0000000000000000000000000000000000000000..50d7272b4b297c13b66823a8ade0ead1f22155de
--- /dev/null
+++ b/third_party/JSON/JSON-2.59/t/16_tied.t
@@ -0,0 +1,23 @@
+# copied over from JSON::XS and modified to use JSON
+
+use strict;
+use Test::More;
+BEGIN { plan tests => 2 };
+
+BEGIN { $ENV{PERL_JSON_BACKEND} = "JSON::backportPP"; }
+
+use JSON;
+use Tie::Hash;
+use Tie::Array;
+
+my $js = JSON->new;
+
+tie my %h, 'Tie::StdHash';
+%h = (a => 1);
+
+ok ($js->encode (\%h) eq '{"a":1}');
+
+tie my @a, 'Tie::StdArray';
+@a = (1, 2);
+
+ok ($js->encode (\@a) eq '[1,2]');