add IsValid::JSON goodie plugin

lib/DDG/Goodie/IsValid/JSON.pm

@@ -0,0 +1,24 @@
+package DDG::Goodie::IsValid::JSON;
+
+use DDG::Goodie;
+
+use Try::Tiny;
+use JSON qw(from_json);
+
+zci answer_type => 'isvalid';
+zci is_cached   => 1;
+
+triggers start => 'is valid json', 'validate json';
+
+handle remainder => sub {
+	my $result = try {
+		from_json($_);
+		return 'valid';
+	} catch {
+		return 'invalid';
+	};
+
+	return "Your JSON is $result!";
+};
+
+1;

t/IsValid.t

@@ -0,0 +1,22 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+
+use Test::More;
+use DDG::Test::Goodie;
+
+zci answer_type => 'isvalid';
+zci is_cached   => 1;
+
+ddg_goodie_test(
+	[qw(DDG::Goodie::IsValid::JSON)],
+	'is valid json {"test":"lol"}' => test_zci('Your JSON is valid!'),
+);
+
+ddg_goodie_test(
+	[qw(DDG::Goodie::IsValid::JSON)],
+	'is valid json {"test" "lol"}' => test_zci('Your JSON is invalid!'),
+);
+
+done_testing;