Add JSON.pm to third_party

third_party/JSON/JSON-2.59/t/e09_encode.t

+#
+# decode on Perl 5.005, 5.6, 5.8 or later
+#
+use strict;
+use Test::More;
+
+BEGIN { plan tests => 7 };
+
+BEGIN { $ENV{PERL_JSON_BACKEND} = "JSON::backportPP"; }
+
+use JSON;
+
+BEGIN {
+    use lib qw(t);
+    use _unicode_handling;
+}
+
+no utf8;
+
+my $json = JSON->new->allow_nonref;
+
+is($json->encode("ü"),                   q|"ü"|); # as is
+
+$json->ascii;
+
+is($json->encode("\xfc"),           q|"\u00fc"|); # latin1
+is($json->encode("\xc3\xbc"), q|"\u00c3\u00bc"|); # utf8
+is($json->encode("ü"),        q|"\u00c3\u00bc"|); # utf8
+is($json->encode('あ'), q|"\u00e3\u0081\u0082"|);
+
+if ($] >= 5.006) {
+    is($json->encode(chr hex 3042 ),  q|"\u3042"|);
+    is($json->encode(chr hex 12345 ), q|"\ud808\udf45"|);
+}
+else {
+    is($json->encode(chr hex 3042 ),  $json->encode(chr 66));
+    is($json->encode(chr hex 12345 ), $json->encode(chr 69));
+}
+