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diff --git a/cpan/JSON-PP/t/018_json_checker.t b/cpan/JSON-PP/t/018_json_checker.t
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+#! perl
+
+# use the testsuite from http://www.json.org/JSON::PP_checker/
+# except for fail18.json, as we do not support a depth of 20 (but 16 and 32).
+
+# copied over from JSON::PP::XS and modified to use JSON::PP
+
+use strict;
+#no warnings;
+local $^W = undef;
+use Test::More;
+BEGIN { plan tests => 39 };
+BEGIN { $ENV{PERL_JSON_BACKEND} = 0; }
+
+use JSON::PP;
+
+my $json = JSON::PP->new->utf8->max_depth(32)->canonical;
+
+binmode DATA;
+my $num = 1;
+for (;;) {
+
+ $/ = "\n# ";
+ chomp (my $test = <DATA>)
+ or last;
+ $/ = "\n";
+ my $name = <DATA>;
+ if (my $perl = eval { $json->decode ($test) }) {
+ ok ($name =~ /^pass/, $name);
+#print $json->encode ($perl), "\n";
+ is ($json->encode ($json->decode ($json->encode ($perl))), $json->encode ($perl));
+ } else {
+ ok ($name =~ /^fail/, "$name ($@)");
+ }
+
+}
+
+__DATA__
+"A JSON::PP payload should be an object or array, not a string."
+# fail1.json
+{"Extra value after close": true} "misplaced quoted value"
+# fail10.json
+{"Illegal expression": 1 + 2}
+# fail11.json
+{"Illegal invocation": alert()}
+# fail12.json
+{"Numbers cannot have leading zeroes": 013}
+# fail13.json
+{"Numbers cannot be hex": 0x14}
+# fail14.json
+["Illegal backslash escape: \x15"]
+# fail15.json
+[\naked]
+# fail16.json
+["Illegal backslash escape: \017"]
+# fail17.json
+[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[[["Too deep"]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
+# fail18.json
+{"Missing colon" null}
+# fail19.json
+["Unclosed array"
+# fail2.json
+{"Double colon":: null}
+# fail20.json
+{"Comma instead of colon", null}
+# fail21.json
+["Colon instead of comma": false]
+# fail22.json
+["Bad value", truth]
+# fail23.json
+['single quote']
+# fail24.json
+[" tab character in string "]
+# fail25.json
+["tab\ character\ in\ string\ "]
+# fail26.json
+["line
+break"]
+# fail27.json
+["line\
+break"]
+# fail28.json
+[0e]
+# fail29.json
+{unquoted_key: "keys must be quoted"}
+# fail3.json
+[0e+]
+# fail30.json
+[0e+-1]
+# fail31.json
+{"Comma instead if closing brace": true,
+# fail32.json
+["mismatch"}
+# fail33.json
+["extra comma",]
+# fail4.json
+["double extra comma",,]
+# fail5.json
+[ , "<-- missing value"]
+# fail6.json
+["Comma after the close"],
+# fail7.json
+["Extra close"]]
+# fail8.json
+{"Extra comma": true,}
+# fail9.json
+[
+ "JSON::PP Test Pattern pass1",
+ {"object with 1 member":["array with 1 element"]},
+ {},
+ [],
+ -42,
+ true,
+ false,
+ null,
+ {
+ "integer": 1234567890,
+ "real": -9876.543210,
+ "e": 0.123456789e-12,
+ "E": 1.234567890E+34,
+ "": 23456789012E66,
+ "zero": 0,
+ "one": 1,
+ "space": " ",
+ "quote": "\"",
+ "backslash": "\\",
+ "controls": "\b\f\n\r\t",
+ "slash": "/ & \/",
+ "alpha": "abcdefghijklmnopqrstuvwyz",
+ "ALPHA": "ABCDEFGHIJKLMNOPQRSTUVWYZ",
+ "digit": "0123456789",
+ "0123456789": "digit",
+ "special": "`1~!@#$%^&*()_+-={':[,]}|;.</>?",
+ "hex": "\u0123\u4567\u89AB\uCDEF\uabcd\uef4A",
+ "true": true,
+ "false": false,
+ "null": null,
+ "array":[ ],
+ "object":{ },
+ "address": "50 St. James Street",
+ "url": "http://www.JSON::PP.org/",
+ "comment": "// /* <!-- --",
+ "# -- --> */": " ",
+ " s p a c e d " :[1,2 , 3
+
+,
+
+4 , 5 , 6 ,7 ],"compact":[1,2,3,4,5,6,7],
+ "jsontext": "{\"object with 1 member\":[\"array with 1 element\"]}",
+ "quotes": "&#34; \u0022 %22 0x22 034 &#x22;",
+ "\/\\\"\uCAFE\uBABE\uAB98\uFCDE\ubcda\uef4A\b\f\n\r\t`1~!@#$%^&*()_+-=[]{}|;:',./<>?"
+: "A key can be any string"
+ },
+ 0.5 ,98.6
+,
+99.44
+,
+
+1066,
+1e1,
+0.1e1,
+1e-1,
+1e00,2e+00,2e-00
+,"rosebud"]
+# pass1.json
+[[[[[[[[[[[[[[[[[[["Not too deep"]]]]]]]]]]]]]]]]]]]
+# pass2.json
+{
+ "JSON::PP Test Pattern pass3": {
+ "The outermost value": "must be an object or array.",
+ "In this test": "It is an object."
+ }
+}
+
+# pass3.json