Add JSON.pm to third_party

third_party/JSON/JSON-2.59/t/xe08_decode.t

+#
+# decode on Perl 5.005, 5.6, 5.8 or later
+#
+use strict;
+use Test::More;
+
+BEGIN { plan tests => 6 };
+
+BEGIN { $ENV{PERL_JSON_BACKEND} = 1; }
+
+use JSON;
+
+BEGIN {
+    use lib qw(t);
+    use _unicode_handling;
+}
+
+no utf8;
+
+SKIP: {
+    skip "can't use JSON::XS.", 6, unless( JSON->backend->is_xs );
+
+my $json = JSON->new->allow_nonref;
+
+
+is($json->decode(q|"ü"|),                   "ü"); # utf8
+is($json->decode(q|"\u00fc"|),           "\xfc"); # latin1
+is($json->decode(q|"\u00c3\u00bc"|), "\xc3\xbc"); # utf8
+
+my $str = 'あ'; # Japanese 'a' in utf8
+
+is($json->decode(q|"\u00e3\u0081\u0082"|), $str);
+
+utf8::decode($str); # usually UTF-8 flagged on, but no-op for 5.005.
+
+is($json->decode(q|"\u3042"|), $str);
+
+
+my $utf8 = $json->decode(q|"\ud808\udf45"|); # chr 12345
+
+utf8::encode($utf8); # UTf-8 flaged off
+
+is($utf8, "\xf0\x92\x8d\x85");
+
+}